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STL to SEA

St Louis to Seattle Flights

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.

Fare checked before payment All fees shown upfront Transparent cancellation policy 24×7 booking support
Lowest fare₹8,112Delta Air Lines
Fastest4h 28mgate to gate
Options found81flights on this route
Find your flight STL SEA

Available Flights & Fares

Compare fares, timings and baggage. Pick the flight that suits your trip.

Prices in INR
81 flight options

Fares are checked again before payment.

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Delta Air Lines
Delta Air Lines
DL-4653
06:21
2026-10-30
St Louis (STL)Lambert-St Louis Intl
6H :38 M
1 Stop
MSP · 0h 54m Minneapolis (MSP), United States
10:59
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-1626
06:47
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :58 M
1 Stop
DTW · 3h 20m Detroit (DTW), United States
14:45
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-2363
07:45
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :05 M
1 Stop
SLC · 3h 21m Salt Lake City (SLC), United States
14:50
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-2868
10:35
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :00 M
1 Stop
DTW · 3h 25m Detroit (DTW), United States
18:35
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-2455
14:22
2026-10-30
St Louis (STL)Lambert-St Louis Intl
6H :40 M
1 Stop
SLC · 1h 02m Salt Lake City (SLC), United States
19:02
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-1371
14:38
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :27 M
1 Stop
DTW · 2h 47m Detroit (DTW), United States
22:05
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-5324
12:28
2026-10-30
St Louis (STL)Lambert-St Louis Intl
6H :30 M
1 Stop
MSP · 0h 53m Minneapolis (MSP), United States
16:58
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-2261
05:40
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :34 M
1 Stop
DFW · 1h 00m Dallas (DFW), United States
11:14
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-537
06:32
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :20 M
1 Stop
DFW · 3h 50m Dallas (DFW), United States
14:52
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 6 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-1997
07:29
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :14 M
1 Stop
ORD · 3h 55m Chicago (ORD), United States
15:43
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-1959
08:48
2026-10-30
St Louis (STL)Lambert-St Louis Intl
8H :04 M
1 Stop
DFW · 1h 33m Dallas (DFW), United States
14:52
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-1959
08:48
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :00 M
1 Stop
DFW · 3h 33m Dallas (DFW), United States
16:48
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-2761
19:10
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :00 M
1 Stop
DFW · 0h 41m Dallas (DFW), United States
00:10
2026-10-31
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Delta Air Lines
Delta Air Lines
DL-2363
07:45
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :07 M
1 Stop
SLC · 1h 23m Salt Lake City (SLC), United States
12:52
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-2261
05:40
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :55 M
1 Stop
DFW · 3h 31m Dallas (DFW), United States
13:35
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 3 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-537
06:32
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :03 M
1 Stop
DFW · 2h 36m Dallas (DFW), United States
13:35
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 3 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
United Airlines
United Airlines
UA-4439
05:00
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :19 M
1 Stop
ORD · 2h 56m Chicago (ORD), United States
12:19
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1371
06:15
2026-10-30
St Louis (STL)Lambert-St Louis Intl
9H :10 M
1 Stop
IAH · 1h 45m Houston (IAH), United States
13:25
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2414
07:30
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :02 M
1 Stop
ORD · 3h 45m Chicago (ORD), United States
15:32
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1257
08:00
2026-10-30
St Louis (STL)Lambert-St Louis Intl
10H :27 M
1 Stop
SFO · 3h 34m San Francisco (SFO), United States
16:27
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-714
13:08
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :55 M
1 Stop
ORD · 1h 40m Chicago (ORD), United States
19:03
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-663
16:39
2026-10-30
St Louis (STL)Lambert-St Louis Intl
6H :40 M
1 Stop
DEN · 1h 00m Denver (DEN), United States
21:19
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces

Recommended hotels in Seattle

Stay options near the arrival city for the same travel date.

Search hotels
United Airlines
United Airlines
UA-663
16:39
2026-10-30
St Louis (STL)Lambert-St Louis Intl
8H :36 M
1 Stop
DEN · 2h 57m Denver (DEN), United States
23:15
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1251
18:50
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :09 M
1 Stop
ORD · 1h 01m Chicago (ORD), United States
23:59
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-214
19:05
2026-10-30
St Louis (STL)Lambert-St Louis Intl
7H :54 M
1 Stop
SFO · 0h 54m San Francisco (SFO), United States
00:59
2026-10-31
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2414
07:30
2026-10-30
St Louis (STL)Lambert-St Louis Intl
15H :17 M
1 Stop
ORD · 2h 52m Chicago (ORD), United States
20:47
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
No flights match the selected filters. Clear filters or open full search.

Airfare Highlights

From flights departing on Fri, 30 Oct 2026.

Lowest fare ₹8,112 Delta Air Lines 06:21
Earliest departure ₹16,497 United Airlines 05:00
Shortest duration ₹21,150 American Airlines 16:42
Night 00:00-05:59 ₹13,030 American Airlines at 05:40
Morning 06:00-11:59 ₹8,112 Delta Air Lines at 06:21
Afternoon 12:00-17:59 ₹8,112 Delta Air Lines at 14:22
Evening 18:00-23:59 ₹13,030 American Airlines at 19:10

Departure & Arrival Airport Details

St Louis (STL)

Lambert-St Louis Intl

United States

GMT -6

Latitude: 38.748697

Longitude: -90.370003

Seattle (SEA)

Seattle/tacoma International

United States

GMT -8

Latitude: 47.449001

Longitude: -122.308998

Distance: St Louis (STL), United States to Seattle (SEA), United States - 2,744.34 km
Flights shown for 30 Oct 2026. View all flights opens the complete search result.
Route forecast

Weather in St Louis and Seattle

Live forecast for both cities, 12 Oct to 15 Oct.

Departure city

St Louis

Thu, 15 Oct
28°CClear skyLow 20°
72% humidity 12 km/h wind 0.2 mm rain
  • Mon24° / 15°
  • Tue30° / 17°
  • Wed28° / 18°
Arrival city

Seattle

Thu, 15 Oct
17°CClear skyLow 7°
79% humidity 4 km/h wind
  • Mon13° / 8°
  • Tue13° / 7°
  • Wed16° / 7°

Forecast data from MET Norway, CC BY 4.0.

Smart travel dates

Holidays and peak dates for Seattle

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).

  • 12OctColumbus DayMonday
  • 12OctColumbus DayMonday
  • 12OctIndigenous Peoples' DayMonday
  • 11NovVeterans DayWednesday
  • 26NovThanksgiving DayThursday
  • 25DecChristmas DayFriday

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 St Louis to Seattle

Ways to make this trip that you can book on FlyX, compared by price and journey time.

OptionFromJourney timeAvailabilityAction
Non-stop flight Fastest₹17,9684h 28m4 flights
Connecting flight₹8,112Longer, includes a stop77 options

Air distance is about 2,744 km. 4 airlines operate this route.

Road distance and coach duration are approximate estimates from the air distance, not a timetable.

Airlines flying from St Louis to Seattle

Compare fares, stops, baggage and refundability across the airlines flying this route.

United Airlines Flights

from ₹16,49733 flights
Fares from
₹16,497
Non-stop
None in these results
Departures
33 in the list above

Delta Air Lines Flights

from ₹8,11224 flights
Fares from
₹8,112
Non-stop
None in these results
Departures
24 in the list above

American Airlines Flights

from ₹13,03022 flights
Fares from
₹13,030
Non-stop
2 in these results
Departures
22 in the list above

Route Overview & Flight Facts

Fastest flight duration4h 28m · American Airlines
First departure of the day05:00 · United Airlines
Last departure of the day19:10 · American Airlines
Flight options found81
Direct / non-stop options4
Airport codesSt Louis–STL, Seattle–SEA

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 Fri, 30 Oct found 81 flight options, 4 of them non-stop. The first flight leaves around 05:00 and the last around 19:10. The fastest flight takes about 4h 28m.

Morning vs Evening Departure Fares

Lowest fare by departure window: Morning from ₹8,112, Afternoon from ₹8,112, Night from ₹13,030, Evening from ₹13,030. 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. 1
    Enter your travel details

    Choose one-way or round-trip, pick your dates and travellers in the search form above.

  2. 2
    Compare search results

    Sort or filter the St Louis–Seattle results by price, departure time, stops and airline.

  3. 3
    Open the fare choices

    Check baggage allowance and refundability for each fare type before continuing.

  4. 4
    Review the final price

    Review the refreshed supplier fare, coupon saving and selected payment-method fee before you pay.

  5. 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 St Louis to Seattle 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

Exclusive Flight Offers & Promo Coupons

Coupon codeOfferMax saving
FLYX20Up to 20% Off on Flights₹1,500

Check coupon eligibility and the final discount on the review page before you pay. View full terms.

Frequently Asked Questions

Is it worth booking St Louis to Seattle 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 St Louis to Seattle dates shown on this page, the lowest fare is on a Friday at ₹8,112. This can change from week to week.

How far is St Louis from Seattle by air?

The direct air distance between St Louis (STL) and Seattle (SEA) is about 2,744 km. Actual flight time varies with the routing the airline files and with winds on the day.

Are there non-stop flights from STL to SEA?

Yes. 4 non-stop flights are listed on this page for St Louis to Seattle. Use the Stops filter to see only those.

Which airlines fly St Louis to Seattle?

United Airlines, Delta Air Lines and American 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 St Louis to Seattle?

The quickest non-stop St Louis to Seattle flight on this page takes about 4h 28m. Non-stop flights here take between 4h 28m and 4h 33m. Journeys with a stop take longer, since the total includes the layover.

What is the cheapest St Louis to Seattle flight fare?

The lowest St Louis to Seattle fare on this page is ₹8,112. Fares on the same dates run up to ₹75,880, depending on airline, timing and fare type. Airline prices change often, so search your dates for the current fare.

What time do St Louis to Seattle flights depart?

On the dates shown here, the first departure is around 05:00 and the last around 19:10, local time at St Louis. 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 STL–SEA, 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.

For payment, ticket issuance or a change request, see FlyX support. About FlyX.

United States travel guide for Indian travellers

Planning more than the flight? Our United States guide covers the visa process for Indian passport holders, 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.

Read the United States travel guide

What to Expect When Booking Your Flight

The STL to SEA 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: 2,744.34 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 St Louis to Seattle airfare, in 30 days and in 90 days

Cheapest FareFareDateAirlineDeparture
Lowest Airfare ₹8,112 30/10/2026 Delta Air Lines 06:21
Cheapest Airfare Within 30 Days ₹7,950 07/11/2026 Delta Air Lines 06:21
Cheapest Airfare Within 90 Days ₹7,706 06/01/2027 Delta Air Lines 06:21

Book St Louis to Seattle Flight Tickets on FlyX

FlyX lists each St Louis to Seattle 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.

St Louis to Seattle Flight Distance, Duration and Time

The aerial distance between St Louis and Seattle is about 2,744 KM. In these results, journey times range from 4h 28m to 15h 17m. Flights with a layover take longer because the total includes the connection time.

St Louis to Seattle Flight Schedule and Timing

The search for these dates returned 81 flight options, 4 of them non-stop. The first departure from St Louis is at 05:00 and the last is at 19:10. Flights leave from Lambert-St Louis Intl and land at Seattle/tacoma International.

Flight Route Details & Analysis

Flight DetailsInformation
RouteSt Louis to Seattle
Aerial Distance2,744 KM
Flight Duration4h 28m - 15h 17m
Airport CodesSt Louis - STL, Seattle - SEA
Total Flights Available81 flights4 direct77 with layovers
First Flight DepartureDeparts at 05:00
Last Flight DepartureDeparts at 19:10
Early Morning Flights (12 AM - 8 AM)26 flights2 direct24 with layovers
Morning Flights (8 AM - 12 PM)23 flights0 direct23 with layovers
Afternoon Flights (12 PM - 4 PM)20 flights0 direct20 with layovers
Evening Flights (4 PM - 8 PM)12 flights2 direct10 with layovers
Night Flights (8 PM - 12 AM)No flights in this time slot

Airport Information & Terminals

STL: St. Louis airport. St. Louis airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.

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.

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