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SEA to STL

Seattle to St Louis 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
Fastest3h 56mgate to gate
Options found72flights on this route
Find your flight SEA STL

Available Flights & Fares

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

Prices in INR
72 flight options

Fares are checked again before payment.

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Delta Air Lines
Delta Air Lines
DL-2858
07:15
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :29 M
1 Stop
SLC · 3h 23m Salt Lake City (SLC), United States
17:44
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-810
23:10
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :39 M
1 Stop
DTW · 2h 42m Detroit (DTW), United States
09:49
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-953
23:50
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :48 M
1 Stop
MSP · 3h 57m Minneapolis (MSP), United States
10:38
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-3234
10:31
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :26 M
1 Stop
ORD · 2h 39m Chicago (ORD), United States
20:57
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-717
14:26
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
7H :16 M
1 Stop
DFW · 1h 25m Dallas (DFW), United States
23:42
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-1476
15:14
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
7H :05 M
1 Stop
ORD · 1h 31m Chicago (ORD), United States
00:19
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-2379
23:59
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :52 M
1 Stop
ORD · 3h 25m Chicago (ORD), United States
10:51
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Delta Air Lines
Delta Air Lines
DL-1128
05:30
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :02 M
1 Stop
SLC · 1h 03m Salt Lake City (SLC), United States
13:32
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-1872
06:12
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :41 M
1 Stop
ORD · 3h 02m Chicago (ORD), United States
16:53
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
United Airlines
United Airlines
UA-2618
07:00
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :43 M
1 Stop
ORD · 1h 02m Chicago (ORD), United States
15:43
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-499
07:00
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
9H :05 M
1 Stop
SFO · 2h 56m San Francisco (SFO), United States
18:05
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1372
09:05
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
7H :00 M
1 Stop
SFO · 0h 51m San Francisco (SFO), United States
18:05
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-737
10:40
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
9H :35 M
1 Stop
SFO · 3h 26m San Francisco (SFO), United States
22:15
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2416
13:16
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :59 M
1 Stop
SFO · 0h 54m San Francisco (SFO), United States
22:15
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2340
14:30
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :54 M
1 Stop
ORD · 1h 20m Chicago (ORD), United States
23:24
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2614
22:56
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
7H :59 M
1 Stop
ORD · 2h 21m Chicago (ORD), United States
08:55
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2614
22:56
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
9H :36 M
1 Stop
ORD · 3h 49m Chicago (ORD), United States
10:32
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2767
23:59
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :03 M
1 Stop
IAH · 1h 47m Houston (IAH), United States
10:02
2026-10-31
St Louis (STL)Lambert-St Louis Intl
Non Refundable 4 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-767
12:04
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
9H :38 M
1 Stop
DFW · 3h 44m Dallas (DFW), United States
23:42
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
AA
American Airlines
AA-7468
18:03
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
3H :56 M
Non Stop
23:59
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
United Airlines
United Airlines
UA-757
05:05
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
5H :33 M
1 Stop
DEN · 0h 53m Denver (DEN), United States
12:38
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 8 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2618
07:00
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
9H :09 M
1 Stop
ORD · 3h 25m Chicago (ORD), United States
18:09
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces

Recommended hotels in St Louis

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

Search hotels
United Airlines
United Airlines
UA-747
10:50
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :50 M
1 Stop
ORD · 3h 10m Chicago (ORD), United States
21:40
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-1833
11:03
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
10H :56 M
1 Stop
CLT · 3h 45m Charlotte (CLT), United States
23:59
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
United Airlines
United Airlines
UA-1534
12:45
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :14 M
1 Stop
DEN · 1h 26m Denver (DEN), United States
20:59
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
AA
American Airlines
AA-858
13:25
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
8H :34 M
1 Stop
CLT · 1h 26m Charlotte (CLT), United States
23:59
2026-10-30
St Louis (STL)Lambert-St Louis Intl
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 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 07:15
Earliest departure ₹27,683 American Airlines 00:25
Shortest duration ₹21,150 American Airlines 18:03
Night 00:00-05:59 ₹14,960 Delta Air Lines at 05:30
Morning 06:00-11:59 ₹8,112 Delta Air Lines at 07:15
Afternoon 12:00-17:59 ₹13,030 American Airlines at 14:26
Evening 18:00-23:59 ₹8,112 Delta Air Lines at 23:10

Departure & Arrival Airport Details

Seattle (SEA)

Seattle/tacoma International

United States

GMT -8

Latitude: 47.449001

Longitude: -122.308998

St Louis (STL)

Lambert-St Louis Intl

United States

GMT -6

Latitude: 38.748697

Longitude: -90.370003

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

Weather in Seattle and St Louis

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

Departure city

Seattle

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

Forecast data from MET Norway, CC BY 4.0.

Smart travel dates

Holidays and peak dates for St Louis

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 Seattle to St Louis

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

OptionFromJourney timeAvailabilityAction
Non-stop flight Fastest₹21,1503h 56m4 flights
Connecting flight₹8,112Longer, includes a stop68 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 Seattle to St Louis

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

United Airlines Flights

from ₹16,49727 flights
Fares from
₹16,497
Non-stop
None in these results
Departures
27 in the list above

Delta Air Lines Flights

from ₹8,11222 flights
Fares from
₹8,112
Non-stop
None in these results
Departures
22 in the list above

American Airlines Flights

from ₹13,03021 flights
Fares from
₹13,030
Non-stop
2 in these results
Departures
21 in the list above

Route Overview & Flight Facts

Fastest flight duration3h 56m · American Airlines
First departure of the day00:25 · American Airlines
Last departure of the day23:59 · American Airlines
Flight options found72
Direct / non-stop options4
Airport codesSeattle–SEA, St Louis–STL

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 72 flight options, 4 of them non-stop. The first flight leaves around 00:25 and the last around 23:59. The fastest flight takes about 3h 56m.

Morning vs Evening Departure Fares

Lowest fare by departure window: Morning from ₹8,112, Evening from ₹8,112, Afternoon from ₹13,030, Night from ₹14,960. 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 Seattle–St Louis 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 Seattle to St Louis 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 Seattle to St Louis 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 St Louis 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 Seattle from St Louis by air?

The direct air distance between Seattle (SEA) and St Louis (STL) 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 SEA to STL?

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

Which airlines fly Seattle to St Louis?

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 Seattle to St Louis?

The quickest non-stop Seattle to St Louis flight on this page takes about 3h 56m. Non-stop flights here take between 3h 56m and 4h 4m. Journeys with a stop take longer, since the total includes the layover.

What is the cheapest Seattle to St Louis flight fare?

The lowest Seattle to St Louis fare on this page is ₹8,112. Fares on the same dates run up to ₹90,879, depending on airline, timing and fare type. Airline prices change often, so search your dates for the current fare.

What time do Seattle to St Louis 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–STL, 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 SEA to STL 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 Seattle to St Louis airfare, in 30 days and in 90 days

Cheapest FareFareDateAirlineDeparture
Lowest Airfare ₹8,112 30/10/2026 Delta Air Lines 07:15
Cheapest Airfare Within 30 Days ₹7,950 07/11/2026 Delta Air Lines 07:15
Cheapest Airfare Within 90 Days ₹7,706 06/01/2027 Delta Air Lines 07:15

Book Seattle to St Louis Flight Tickets on FlyX

FlyX lists each Seattle to St Louis 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 St Louis Flight Distance, Duration and Time

The aerial distance between Seattle and St Louis is about 2,744 KM. In these results, journey times range from 3h 56m to 11h 48m. Flights with a layover take longer because the total includes the connection time.

Seattle to St Louis Flight Schedule and Timing

The search for these dates returned 72 flight options, 4 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 Lambert-St Louis Intl.

Flight Route Details & Analysis

Flight DetailsInformation
RouteSeattle to St Louis
Aerial Distance2,744 KM
Flight Duration3h 56m - 11h 48m
Airport CodesSeattle - SEA, St Louis - STL
Total Flights Available72 flights4 direct68 with layovers
First Flight DepartureDeparts at 00:25
Last Flight DepartureDeparts at 23:59
Early Morning Flights (12 AM - 8 AM)19 flights0 direct19 with layovers
Morning Flights (8 AM - 12 PM)24 flights2 direct22 with layovers
Afternoon Flights (12 PM - 4 PM)11 flights0 direct11 with layovers
Evening Flights (4 PM - 8 PM)2 flights2 direct0 with layovers
Night Flights (8 PM - 12 AM)16 flights0 direct16 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.

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.

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