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St. Louis (STL) to Seattle (SEA) Flights from ₹17,872

Fares on this route currently start from ₹17,872. Compare live STL to SEA prices, non-stop and connecting flights, departure times and airline choices before booking. Use the search panel to change origin, destination, passengers, cabin and trip type instantly.
STL → SEA Approx. 2744.34 km 14 Jul 2026 Live inventory
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Showing 25 of 155 live flights
United Airlines
UA-2482
19:23
07/14/2026
STL
St Louis Lambert International Airport
5h 50m
1 Stop
⏱ SFO · 1h 16mSFO Airport
01:13
07/15/2026
+1
SEA
Seattle Tacoma International Airport
₹17,872
per person
✕ Non-refundable10 fare options
alaskaairlines
AS-647
19:56
07/14/2026
STL
St Louis Lambert International Airport
2h 28m
Non-stop
22:24
07/14/2026
SEA
Seattle Tacoma International Airport
₹17,905
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-1492
19:55
07/14/2026
STL
St Louis Lambert International Airport
4h 4m
1 Stop
⏱ SLC · 0h 40mSLC Airport
23:59
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,248
per person
✕ Non-refundable7 fare options
Southwest Airlines
WN-3912
16:00
07/14/2026
STL
St Louis Lambert International Airport
4h 30m
1 Stop
⏱ DEN · 0h 55mDEN Airport
20:30
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable🔥 Last 2 seats6 fare options
Southwest Airlines
WN-3935
18:55
07/14/2026
STL
St Louis Lambert International Airport
5h 40m
1 Stop
⏱ LAS · 1h 35mLAS Airport
00:35
07/15/2026
+1
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4810
16:25
07/14/2026
STL
St Louis Lambert International Airport
8h 10m
1 Stop
⏱ LAS · 4h 0mLAS Airport
00:35
07/15/2026
+1
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-1860
13:45
07/14/2026
STL
St Louis Lambert International Airport
6h 25m
1 Stop
⏱ BNA · 2h 20mBNA Airport
20:10
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable🔥 Last 1 seats5 fare options
Southwest Airlines
WN-3306
18:20
07/14/2026
STL
St Louis Lambert International Airport
6h 25m
1 Stop
⏱ PHX · 2h 15mPHX Airport
00:45
07/15/2026
+1
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4283
08:30
07/14/2026
STL
St Louis Lambert International Airport
8h 20m
1 Stop
⏱ SAN · 3h 45mSAN Airport
16:50
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable🔥 Last 1 seats5 fare options
Southwest Airlines
WN-824
17:20
07/14/2026
STL
St Louis Lambert International Airport
6h 15m
1 Stop
⏱ DEN · 2h 55mDEN Airport
23:35
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-5072
13:45
07/14/2026
STL
St Louis Lambert International Airport
6h 45m
1 Stop
⏱ DEN · 3h 15mDEN Airport
20:30
07/14/2026
SEA
Seattle Tacoma International Airport
₹18,815
per person
✕ Non-refundable🔥 Last 4 seats5 fare options
Southwest Airlines
WN-3967
06:10
07/14/2026
STL
St Louis Lambert International Airport
7h 25m
1 Stop
⏱ PHX · 1h 30mPHX Airport
13:35
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,321
per person
✕ Non-refundable🔥 Last 2 seats5 fare options
Southwest Airlines
WN-5072
13:45
07/14/2026
STL
St Louis Lambert International Airport
9h 30m
1 Stop
⏱ DEN · 3h 55mDEN Airport
23:15
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,321
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-3912
16:00
07/14/2026
STL
St Louis Lambert International Airport
7h 15m
1 Stop
⏱ DEN · 1h 35mDEN Airport
23:15
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,321
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-3928
08:45
07/14/2026
STL
St Louis Lambert International Airport
9h 35m
2 Stops
⏱ HOU · 2h 0mHOU Airport⏱ PHX · 1h 50mPHX Airport
18:20
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable🔥 Last 2 seats4 fare options
Southwest Airlines
WN-3967
06:10
07/14/2026
STL
St Louis Lambert International Airport
8h 10m
2 Stops
⏱ PHX · 1h 40mPHX Airport⏱ SJC · 1h 5mSJC Airport
14:20
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-4312
11:20
07/14/2026
STL
St Louis Lambert International Airport
10h 10m
2 Stops
⏱ DEN · 3h 55mDEN Airport⏱ SJC · 1h 15mSJC Airport
21:30
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-4359
15:05
07/14/2026
STL
St Louis Lambert International Airport
8h 30m
2 Stops
⏱ LAS · 1h 10mLAS Airport⏱ SMF · 2h 15mSMF Airport
23:35
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable🔥 Last 3 seats4 fare options
Southwest Airlines
WN-4359
15:05
07/14/2026
STL
St Louis Lambert International Airport
8h 10m
2 Stops
⏱ LAS · 1h 55mLAS Airport⏱ OAK · 1h 5mOAK Airport
23:15
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-5072
13:45
07/14/2026
STL
St Louis Lambert International Airport
7h 45m
2 Stops
⏱ DEN · 1h 25mDEN Airport⏱ SJC · 1h 15mSJC Airport
21:30
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-762
14:10
07/14/2026
STL
St Louis Lambert International Airport
6h 20m
2 Stops
⏱ MCI · 0h 55mMCI Airport⏱ DEN · 1h 15mDEN Airport
20:30
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable🔥 Last 4 seats4 fare options
Southwest Airlines
WN-824
17:20
07/14/2026
STL
St Louis Lambert International Airport
6h 15m
2 Stops
⏱ DEN · 0h 45mDEN Airport⏱ SMF · 0h 40mSMF Airport
23:35
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4312
11:20
07/14/2026
STL
St Louis Lambert International Airport
8h 0m
2 Stops
⏱ DEN · 2h 20mDEN Airport⏱ LAS · 0h 50mLAS Airport
19:20
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-3928
08:45
07/14/2026
STL
St Louis Lambert International Airport
10h 35m
2 Stops
⏱ HOU · 3h 50mHOU Airport⏱ LAS · 0h 45mLAS Airport
19:20
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable🔥 Last 4 seats4 fare options
Southwest Airlines
WN-170
13:40
07/14/2026
STL
St Louis Lambert International Airport
9h 55m
2 Stops
⏱ PHX · 1h 25mPHX Airport⏱ SMF · 3h 25mSMF Airport
23:35
07/14/2026
SEA
Seattle Tacoma International Airport
₹19,496
per person
✕ Non-refundable🔥 Last 5 seats4 fare options
😕 No flights match your filters.
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003
Seattle (SEA)
📍 Seattle Tacoma International Airport
🌍 United States
🕐 GMT -8
📐 Latitude: 47.449001
📐 Longitude: -122.308998

✈ Distance: St. Louis,USA to Seattle,USA2744.34 km

📅 Results on this page are loaded for 14 Jul 2026. Click Load more flights to expand the full list on this page.

St. Louis to Seattle — what to expect when booking

The STL–SEA route is served by multiple carriers throughout the year. Fares on this route can move quickly — a price available now may not be there 30 minutes later.

If your dates are flexible, try shifting your departure by a day or two using the date strip above. Mid-week departures often show lower base fares compared to weekend starts on many routes.

The distance between St. Louis,USA and Seattle,USA is approximately 2744.34 km.

Before you book

Compare nearby dates

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More flights from St. Louis (STL)
54 routes
St. Louis Atlanta
STL → ATL
St. Louis Boston
STL → BOS
St. Louis Burlington IA
STL → BRL
St. Louis Cancun
STL → CUN
St. Louis Cape Girardeau
STL → CGI
St. Louis Charlotte
STL → CLT
St. Louis Chicago
STL → MDW
St. Louis Cincinnati
STL → CVG
St. Louis Cleveland
STL → CLE
St. Louis Columbus
STL → CMH
St. Louis Dallas
STL → DAL
St. Louis Decatur
STL → DEC
St. Louis Denver
STL → DEN
St. Louis Detroit
STL → DTW
St. Louis Fort Lauderdale
STL → FLL
St. Louis Fort Leonard Wood
STL → TBN
St. Louis Fort Myers
STL → RSW
St. Louis Fort Worth
STL → DFW
St. Louis Grand Rapids
STL → GRR
St. Louis Houston
STL → IAH
St. Louis Houston
STL → HOU
St. Louis Jonesboro
STL → JBR
St. Louis Kansas City
STL → MCI
St. Louis Kirksville
STL → IRK
St. Louis Las Vegas
STL → LAS
St. Louis Little Rock
STL → LIT
St. Louis Los Angeles
STL → LAX
St. Louis Marion
STL → MWA
St. Louis Miami
STL → MIA
St. Louis Milwaukee
STL → MKE
St. Louis Minneapolis
STL → MSP
St. Louis Montego Bay
STL → MBJ
St. Louis Nashville
STL → BNA
St. Louis New Orleans
STL → MSY
St. Louis New York
STL → JFK
St. Louis Oklahoma City
STL → OKC
St. Louis Omaha
STL → OMA
St. Louis Orlando
STL → MCO
St. Louis Owensboro
STL → OWB
St. Louis Philadelphia
STL → PHL
St. Louis Phoenix
STL → PHX
St. Louis Pittsburgh International Airport
STL → PIT
St. Louis Puerto Vallarta
STL → PVR
St. Louis Punta Cana
STL → PUJ
St. Louis Quincy
STL → UIN
St. Louis Raleigh
STL → RDU
St. Louis Salt Lake City
STL → SLC
St. Louis San Antonio
STL → SAT
St. Louis San Diego
STL → SAN
St. Louis San Francisco
STL → SFO
St. Louis Tampa
STL → TPA
St. Louis Toronto
STL → YYZ
St. Louis Tulsa
STL → TUL
St. Louis Washington DC
STL → IAD
More flights from Seattle (SEA)
88 routes
Seattle Albuquerque
SEA → ABQ
Seattle Amsterdam
SEA → AMS
Seattle Anchorage
SEA → ANC
Seattle Atlanta
SEA → ATL
Seattle Austin
SEA → AUS
Seattle Beijing
SEA → PEK
Seattle Bellingham
SEA → BLI
Seattle Billings
SEA → BIL
Seattle Boise
SEA → BOI
Seattle Boston
SEA → BOS
Seattle Bozeman
SEA → BZN
Seattle Burbank
SEA → BUR
Seattle Calgary
SEA → YYC
Seattle Charlotte
SEA → CLT
Seattle Chicago
SEA → MDW
Seattle Colorado Springs
SEA → COS
Seattle Dallas
SEA → DAL
Seattle Denver
SEA → DEN
Seattle Detroit
SEA → DTW
Seattle Dubai
SEA → DXB
Seattle Edmonton
SEA → YEG
Seattle Eugene
SEA → EUG
Seattle Fairbanks
SEA → FAI
Seattle Fort Lauderdale
SEA → FLL
Seattle Fort Worth
SEA → DFW
Seattle Frankfurt
SEA → FRA
Seattle Fresno
SEA → FAT
Seattle Great Falls
SEA → GTF
Seattle Helena
SEA → HLN
Seattle Honolulu
SEA → HNL
Seattle Houston
SEA → IAH
Seattle Juneau
SEA → JNU
Seattle Kahului
SEA → OGG
Seattle Kalispell
SEA → FCA
Seattle Kansas City
SEA → MCI
Seattle Kelowna
SEA → YLW
Seattle Ketchikan
SEA → KTN
Seattle Kona
SEA → KOA
Seattle Las Vegas
SEA → LAS
Seattle Lewiston
SEA → LWS
Seattle Lihue
SEA → LIH
Seattle London
SEA → LHR
Seattle Long Beach
SEA → LGB
Seattle Los Angeles
SEA → LAX
Seattle Medford
SEA → MFR
Seattle Miami
SEA → MIA
Seattle Milwaukee
SEA → MKE
Seattle Minneapolis
SEA → MSP
Seattle Missula
SEA → MSO
Seattle New York
SEA → EWR
Seattle Oakland
SEA → OAK
Seattle Omaha
SEA → OMA
Seattle Ontario
SEA → ONT
Seattle Orlando
SEA → MCO
Seattle Palm Springs
SEA → PSP
Seattle Paris
SEA → CDG
Seattle Pasco
SEA → PSC
Seattle Philadelphia
SEA → PHL
Seattle Phoenix
SEA → PHX
Seattle Portland International
SEA → PDX
Seattle Pullman
SEA → PUW
Seattle Redmond
SEA → RDM
Seattle Reno
SEA → RNO
Seattle Reykjavik
SEA → KEF
Seattle Sacramento
SEA → SMF
Seattle Salt Lake City
SEA → SLC
Seattle San Antonio
SEA → SAT
Seattle San Diego
SEA → SAN
Seattle San Francisco
SEA → SFO
Seattle San Jose
SEA → SJC
Seattle Santa Ana
SEA → SNA
Seattle Santa Barbara
SEA → SBA
Seattle Santa Rosa
SEA → STS
Seattle Seoul
SEA → ICN
Seattle Shanghai
SEA → PVG
Seattle Spokane
SEA → GEG
Seattle St. Louis
SEA → STL
Seattle Taipei
SEA → TPE
Seattle Tampa
SEA → TPA
Seattle Tokyo
SEA → HND
Seattle Toronto
SEA → YYZ
Seattle Tucson
SEA → TUS
Seattle Vancouver
SEA → YVR
Seattle Victoria
SEA → YYJ
Seattle Walla Walla
SEA → ALW
Seattle Washington DC
SEA → BWI
Seattle Wenatchee
SEA → EAT
Seattle Yakima
SEA → YKM
❓ Frequently asked questions — St. Louis to Seattle flights

Generally yes — fares on most routes are most competitive around 4–6 weeks before departure. Booking earlier usually means better availability and a lower base fare when your dates are fixed.

The straight-line distance between St. Louis,USA (STL) and Seattle,USA (SEA) is approximately 2744.34 km. Actual flying distance may vary slightly depending on routing.

Non-stop availability on this route varies by airline schedule and season. Use the filters below to quickly check whether direct options are available on your selected date.

Mid-week departures often show lower prices than weekend travel on many routes. Use the date strip above to compare nearby days quickly.