Compare fares, departure times, stops and baggage details for this route, then open the full search when you are ready to check current availability and complete booking.
SEABOSSat, 14 Nov
Fare checked before payment All fees shown upfront Transparent cancellation policy 24×7 booking support
Lowest fare₹22,376United Airlines
Fastest5h 10mgate to gate
Options found147flights on this route
Find your flightSEA → BOS
Available Flights & Fares
Compare fares, timings and baggage. Pick the flight that suits your trip.
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United Airlines
UA-1372
09:05
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
9H :19 M
Non Stop
21:24
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 4 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,376
Flight DetailsSEA to BOS - 9H :19 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-2618
07:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :24 M
1 Stop
ORD
· 0h 49m Chicago (ORD), United States
17:24
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 7H :24 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1900
07:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :45 M
1 Stop
EWR
· 1h 11m New York (EWR), United States
17:45
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 7H :45 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1900
07:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :53 M
1 Stop
EWR
· 2h 15m New York (EWR), United States
18:53
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 8H :53 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-499
07:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
9H :25 M
1 Stop
SFO
· 1h 27m San Francisco (SFO), United States
19:25
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 9H :25 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-499
07:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
11H :24 M
1 Stop
SFO
· 3h 26m San Francisco (SFO), United States
21:24
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 11H :24 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-672
08:09
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :48 M
1 Stop
IAD
· 1h 07m Washington (IAD), United States
18:57
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 7H :48 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1505
08:30
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :09 M
1 Stop
DEN
· 1h 31m Denver (DEN), United States
19:39
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 4 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 8H :09 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1534
12:45
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :05 M
1 Stop
DEN
· 1h 30m Denver (DEN), United States
23:50
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 8H :05 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-2340
14:30
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :16 M
1 Stop
ORD
· 0h 40m Chicago (ORD), United States
00:46
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 7H :16 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-2478
15:35
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
11H :31 M
1 Stop
SFO
· 3h 40m San Francisco (SFO), United States
06:06
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 11H :31 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-2614
22:56
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :38 M
1 Stop
ORD
· 1h 09m Chicago (ORD), United States
09:34
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 7H :38 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-2614
22:56
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :23 M
1 Stop
ORD
· 1h 54m Chicago (ORD), United States
10:19
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 8H :23 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1538
23:17
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :50 M
1 Stop
EWR
· 2h 24m New York (EWR), United States
11:07
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 8H :50 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1538
23:17
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
10H :09 M
1 Stop
EWR
· 3h 47m New York (EWR), United States
12:26
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,606
Flight DetailsSEA to BOS - 10H :09 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-459
07:38
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
5H :22 M
Non Stop
16:00
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,821
Flight DetailsSEA to BOS - 5H :22 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-474
13:40
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
5H :10 M
Non Stop
21:50
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,821
Flight DetailsSEA to BOS - 5H :10 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-473
23:07
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
5H :13 M
Non Stop
07:20
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹22,821
Flight DetailsSEA to BOS - 5H :13 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-757
05:05
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :25 M
1 Stop
DEN
· 0h 53m Denver (DEN), United States
15:30
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹24,971
Flight DetailsSEA to BOS - 7H :25 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-747
10:50
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
7H :40 M
1 Stop
ORD
· 0h 58m Chicago (ORD), United States
21:30
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹24,971
Flight DetailsSEA to BOS - 7H :40 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-747
10:50
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
10H :08 M
1 Stop
ORD
· 3h 28m Chicago (ORD), United States
23:58
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹24,971
Flight DetailsSEA to BOS - 10H :08 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-5402
19:27
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
9H :29 M
1 Stop
SFO
· 1h 28m San Francisco (SFO), United States
07:56
2026-11-15
BOSTON (BOS)Logan International
Non Refundable 3 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹24,971
Flight DetailsSEA to BOS - 9H :29 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
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Find a stay in Boston. Choose your dates, rooms and guests in hotel search.
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-812
06:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
6H :52 M
1 Stop
DTW
· 0h 41m Detroit (DTW), United States
15:52
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹25,911
Flight DetailsSEA to BOS - 6H :52 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-569
06:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
8H :04 M
1 Stop
ATL
· 0h 47m Atlanta (ATL), United States
17:04
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹25,911
Flight DetailsSEA to BOS - 8H :04 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Delta Air Lines
DL-943
06:00
2026-11-14
SEATTLE (SEA)Seattle/tacoma International
9H :27 M
1 Stop
MSP
· 3h 19m Minneapolis (MSP), United States
18:27
2026-11-14
BOSTON (BOS)Logan International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
₹25,911
Flight DetailsSEA to BOS - 9H :27 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Up to 120 of 147 options on this route. Open the full search to see them all with every filter.
No flights match the selected filters. Clear filters or open full search.
Airfare Highlights
From flights departing on Sat, 14 Nov 2026.
Lowest fare₹22,376United Airlines09:05
Earliest departure₹27,803American Airlines00:25
Shortest duration₹22,821Delta Air Lines13:40
Night
00:00-05:59
₹24,971United Airlines at 05:05Morning
06:00-11:59
₹22,376United Airlines at 09:05Afternoon
12:00-17:59
₹22,606United Airlines at 12:45Evening
18:00-23:59
₹22,606United Airlines at 22:56
Departure & Arrival Airport Details
Seattle (SEA)
Seattle/tacoma International
United States
GMT -8
Latitude: 47.449001
Longitude: -122.308998
Boston (BOS)
Logan International
United States
GMT -5
Latitude: 42.36429977
Longitude: -71.00520325
Distance: Seattle (SEA), United States to Boston (BOS), United States - 4,005.51 km
Flights shown for 14 Nov 2026. View all flights opens the complete search result.
Fares and hotel rates usually run higher around these dates. Booking earlier or moving your trip by a day or two often costs less.
Busiest periods: Summer travel (15 Jun – 31 Aug), Holiday season (18 Dec – 02 Jan).
11NovVeterans DayWednesdayPeak
26NovThanksgiving DayThursdayPeak
25DecChristmas DayFridayPeak
01JanNew Year's DayFridayPeak
18JanMartin Luther King, Jr. DayMondayPeak
12FebLincoln's BirthdayFridayPeak
Fixed-date national holidays. Festivals that follow the lunar calendar shift each year and are not listed here, so check the exact date for your travel year.
Compare your journey
How to travel Seattle to Boston
Ways to make this trip that you can book on FlyX, compared by price and journey time.
OptionFromJourney timeAvailabilityAction
Non-stop flight Fastest₹22,3765h 10m9 flights
Connecting flight₹22,606Longer, includes a stop138 options
Air distance is about 4,006 km. 4 airlines operate this route.
Road distance and coach duration are approximate estimates from the air distance, not a timetable.
Airlines flying from Seattle to Boston
Compare fares, stops, baggage and refundability across the airlines flying this route.
UN
United Airlines Flights
from ₹22,37652 flights
Fares from
₹22,376
Non-stop
1 in these results
Departures
52 in the list above
DE
Delta Air Lines Flights
from ₹22,82146 flights
Fares from
₹22,821
Non-stop
3 in these results
Departures
46 in the list above
AM
American Airlines Flights
from ₹27,80336 flights
Fares from
₹27,803
Non-stop
2 in these results
Departures
36 in the list above
AL
Alaska Airlines Flights
from ₹27,99613 flights
Fares from
₹27,996
Non-stop
3 in these results
Departures
13 in the list above
Route Overview & Flight Facts
Fastest flight duration
5h 10m · Delta Air Lines
First departure of the day
00:25 · American Airlines
Last departure of the day
23:59 · United Airlines
Flight options found
147
Direct / non-stop options
9
Airport codes
Seattle–SEA, Boston–BOS
Fares and timings are indicative. The exact price is confirmed with the airline when you search.
Flight Schedule, Timings & Airfare Insights
Daily Flight Schedule & Travel Duration
The search for Sat, 14 Nov found 147 flight options, 9 of them non-stop. The first flight leaves around 00:25 and the last around 23:59. The fastest flight takes about 5h 10m.
Morning vs Evening Departure Fares
Lowest fare by departure window: Morning from ₹22,376, Afternoon from ₹22,606, Evening from ₹22,606, Night from ₹24,971. These observations do not predict the cheapest departure window on other dates.
Cheapest Airfare & Best Time to Book
Search your travel dates to compare current fares. Prices change with airline seat availability.
One-Way vs Round-Trip Fare Comparison
Compare the complete cost and conditions of both options for your dates. A round-trip can have different fare and change rules from two one-way tickets. One booking may contain multiple airline PNRs; confirm baggage transfer and connection protection for separate tickets.
Online Web Check-In & Boarding Pass
Check the operating airline’s opening time and check-in deadline for each sector. Seat charges and availability depend on your fare. Use the airline reference and the links on Web Check-in.
How to Book Cheap Flights on FlyX
1
Enter your travel details
Choose one-way or round-trip, pick your dates and travellers in the search form above.
2
Compare search results
Sort or filter the Seattle–Boston results by price, departure time, stops and airline.
3
Open the fare choices
Check baggage allowance and refundability for each fare type before continuing.
4
Review the final price
Review the refreshed supplier fare, coupon saving and selected payment-method fee before you pay.
5
Pay securely
UPI, cards, net banking and wallets supported; payment and ticket issuance have separate statuses. If issuance is pending, follow the booking status; the confirmed ticket is sent after issuance.
Why Book Your Flight with FlyX?
Compare the available Seattle to Boston options by total price, stops, baggage and fare conditions. Search your dates for current availability, then review traveller details and the final price before paying.
Payment confirmation and ticket issuance are separate steps. If your booking is awaiting a PNR or ticket, follow its status and contact FlyX support when you need help. Your issued ticket contains the airline reference and itinerary. Change and cancellation charges depend on the purchased fare and any separately disclosed service fee.
Fare checked before paymentCoupon eligibility checkedBooking status trackingBooking support
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Frequently Asked Questions
Is it worth booking Seattle to Boston flights in advance?
There is no guaranteed cheapest booking window. Compare your planned dates early, check nearby dates and consider baggage, connection time and change conditions as well as price. On the Seattle to Boston dates shown on this page, the lowest fare is on a Saturday at ₹22,376. This can change from week to week.
How far is Seattle from Boston by air?
The direct air distance between Seattle (SEA) and Boston (BOS) is about 4,006 km. Actual flight time varies with the routing the airline files and with winds on the day.
Is there a direct flight from Seattle to Boston?
Yes. 9 non-stop flights are listed on this page for Seattle to Boston, operated by United Airlines, Delta Air Lines, American Airlines and Alaska Airlines. Use the Stops filter to see only those.
Which airlines fly Seattle to Boston?
United Airlines, Delta Air Lines, American Airlines and Alaska Airlines are listed on this route for the dates shown here. Fares, baggage allowance and refund rules differ by airline and by fare type, so compare the fare conditions and not only the headline price.
How long is the flight from Seattle to Boston?
The quickest non-stop Seattle to Boston flight on this page takes about 5h 10m. Non-stop flights here take between 5h 10m and 9h 19m. Journeys with a stop take longer, since the total includes the layover.
What is the cheapest Seattle to Boston flight fare?
The lowest Seattle to Boston fare on this page is ₹22,376. Fares on the same dates run up to ₹79,670, depending on airline, timing and fare type. Airline prices change often, so search your dates for the current fare.
Which is the cheapest airline for Seattle to Boston flight?
On this page, United Airlines has the lowest Seattle to Boston fare, starting from ₹22,376. Delta Air Lines is next, from ₹22,821. The cheapest airline can change with the date, so compare a few days around your trip.
What time do Seattle to Boston flights depart?
On the dates shown here, the first departure is around 00:25 and the last around 23:59, local time at Seattle. Use the departure-time filter on the results above to narrow to a morning, afternoon or evening slot.
Why does the price change after clicking Book Now?
Airline seat inventory and fares change continuously. Selecting Book Now runs a live fare verification with the airline so the price you approve is the price you pay. If it has moved, you see the new figure before any payment.
Before you book this route
Check the airport codes SEA–BOS, local departure and arrival dates, and every connecting airport. Connections can have different document and baggage requirements from your final destination.
Where these fares come from
The fares, durations, stops and baggage shown here come from real airline search results for this route. They are examples for the dates on this page, not a full timetable and not a locked price. Run a search to see what is available for your own dates.
Fares shown are for departures on .
Check official travel requirements
Confirm passport, visa and transit rules for your nationality and full itinerary with the relevant government and operating airline. IATA travel-document information explains why requirements vary.
Planning more than the flight? Our United States guide covers the best time to go, how long to plan for, and which places are worth the days you have. Long-haul city breaks and national parks.
The SEA to BOS cards above show selected flight options. Airline prices and seat availability can move quickly, so the final fare is rechecked in the booking flow.
Approx route distance: 4,005.51 km.
Before you book
Compare nearby dates
The date strip opens the complete search result for the route and selected date.
Use filters
Shortlist by price, stops, departure time and refundable fare preference.
Check fare choices
Continue to Booking opens the verified fare choices, including baggage and refundability, before review.
Lowest Seattle to Boston airfare, in 30 days and in 90 days
Cheapest Fare
Fare
Date
Airline
Departure
Lowest Airfare
₹22,376
14/11/2026
United Airlines
09:05
Cheapest Airfare Within 30 Days
₹21,928
27/11/2026
United Airlines
09:05
Cheapest Airfare Within 90 Days
₹21,257
26/01/2027
United Airlines
09:05
Book Seattle to Boston Flight Tickets on FlyX
FlyX lists each Seattle to Boston flight in these results with its fare, departure time, stops, layover airport and baggage, so you can compare air tickets side by side. To find a cheap ticket, sort by price and check what baggage the fare includes. The fare is checked with the airline again before you pay.
Seattle to Boston Flight Distance, Duration and Time
The aerial distance between Seattle and Boston is about 4,006 KM. In these results, journey times range from 5h 10m to 22h 50m. Flights with a layover take longer because the total includes the connection time.
Seattle to Boston flight duration is approximately 5 hours 10 minutes non-stop. There are 9 non-stop Seattle to Boston direct flights on the departure date shown on this page. Seattle to Boston flight distance is around 4,006 KM.
Seattle to Boston Flight Schedule and Timing
The search for these dates returned 147 flight options, 9 of them non-stop. The first departure from Seattle is at 00:25 and the last is at 23:59. Flights leave from Seattle/tacoma International and land at Logan International.
Flight Route Details & Analysis
Flight Details
Information
Route
Seattle to Boston
Aerial Distance
4,006 KM
Flight Duration
5h 10m - 22h 50m
Airport Codes
Seattle - SEA, Boston - BOS
Total Flights Available
147 flights9 direct138 with layovers
First Flight Departure
Departs at 00:25
Last Flight Departure
Departs at 23:59
Early Morning Flights (12 AM - 8 AM)
51 flights1 direct50 with layovers
Morning Flights (8 AM - 12 PM)
33 flights3 direct30 with layovers
Afternoon Flights (12 PM - 4 PM)
22 flights3 direct19 with layovers
Evening Flights (4 PM - 8 PM)
10 flights0 direct10 with layovers
Night Flights (8 PM - 12 AM)
31 flights2 direct29 with layovers
Airport Information & Terminals
SEA: Seattle-Tacoma International Airport. Sea-Tac connects to downtown by light rail, while cabs are useful for Bellevue, Redmond or late-night arrivals. Rain and freeway traffic should be part of the plan.
BOS: Boston Logan International Airport. Logan is close to downtown Boston compared with many US airports. Taxis, airport buses and transit work well, but winter weather and academic move-in dates can change travel ease.
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Seattle to Boston
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Seattle/tacoma International
