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St. Louis (STL) to Seattle (SEA) Flights from ₹14,850

Fares on this route currently start from ₹14,850. 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 04 Jun 2026 Live inventory
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Showing 25 of 154 live flights
Frontier Airlines
F9-4567
20:08
06/04/2026
STL
St Louis Lambert International Airport
13h 58m
1 Stop
⏱ DEN · 10h 19mDEN Airport
10:06
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹14,850
per person
✕ Non-refundable
Delta Air Lines
DL-2421
19:59
06/04/2026
STL
St Louis Lambert International Airport
4h 11m
1 Stop
⏱ SLC · 0h 48mSLC Airport
00:10
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹18,721
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-2455
14:27
06/04/2026
STL
St Louis Lambert International Airport
4h 19m
1 Stop
⏱ SLC · 0h 51mSLC Airport
18:46
06/04/2026
SEA
Seattle Tacoma International Airport
₹18,721
per person
✕ Non-refundable7 fare options
Southwest Airlines
WN-596
18:30
06/04/2026
STL
St Louis Lambert International Airport
6h 0m
1 Stop
⏱ MDW · 2h 25mMDW Airport
00:30
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹19,365
per person
✕ Non-refundable🔥 Last 3 seats9 fare options
Southwest Airlines
WN-297
09:55
06/04/2026
STL
St Louis Lambert International Airport
11h 35m
2 Stops
⏱ RDU · 0h 35mRDU Airport⏱ PHX · 3h 45mPHX Airport
21:30
06/04/2026
SEA
Seattle Tacoma International Airport
₹20,049
per person
✕ Non-refundable🔥 Last 1 seats4 fare options
Frontier Airlines
F9-2017
21:06
06/04/2026
STL
St Louis Lambert International Airport
13h 30m
1 Stop
⏱ LAS · 9h 2mLAS Airport
10:36
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹21,077
per person
✕ Non-refundable
Southwest Airlines
WN-3935
19:45
06/04/2026
STL
St Louis Lambert International Airport
5h 5m
1 Stop
⏱ LAS · 1h 0mLAS Airport
00:50
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹23,200
per person
✕ Non-refundable🔥 Last 3 seats9 fare options
Southwest Airlines
WN-297
09:55
06/04/2026
STL
St Louis Lambert International Airport
8h 40m
1 Stop
⏱ BWI · 1h 15mBWI Airport
18:35
06/04/2026
SEA
Seattle Tacoma International Airport
₹23,707
per person
✕ Non-refundable🔥 Last 2 seats5 fare options
Southwest Airlines
WN-329
15:20
06/04/2026
STL
St Louis Lambert International Airport
9h 30m
1 Stop
⏱ LAS · 3h 25mLAS Airport
00:50
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹23,707
per person
✕ Non-refundable🔥 Last 4 seats4 fare options
Southwest Airlines
WN-3882
16:25
06/04/2026
STL
St Louis Lambert International Airport
8h 5m
2 Stops
⏱ ATL · 0h 35mATL Airport⏱ MDW · 1h 30mMDW Airport
00:30
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹23,883
per person
✕ Non-refundable🔥 Last 1 seats4 fare options
Southwest Airlines
WN-3944
16:45
06/04/2026
STL
St Louis Lambert International Airport
7h 45m
2 Stops
⏱ MCI · 2h 5mMCI Airport⏱ MDW · 0h 40mMDW Airport
00:30
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹23,883
per person
✕ Non-refundable🔥 Last 3 seats4 fare options
Southwest Airlines
WN-824
13:55
06/04/2026
STL
St Louis Lambert International Airport
10h 10m
2 Stops
⏱ DEN · 3h 45mDEN Airport⏱ SJC · 1h 30mSJC Airport
00:05
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹23,883
per person
✕ Non-refundable🔥 Last 3 seats4 fare options
Southwest Airlines
WN-329
15:20
06/04/2026
STL
St Louis Lambert International Airport
8h 45m
2 Stops
⏱ LAS · 1h 0mLAS Airport⏱ SJC · 0h 40mSJC Airport
00:05
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹24,392
per person
✕ Non-refundable🔥 Last 3 seats4 fare options
Southwest Airlines
WN-596
18:30
06/04/2026
STL
St Louis Lambert International Airport
12h 40m
1 Stop
⏱ OAK · 4h 50mOAK Airport
07:10
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹24,752
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-297
09:55
06/04/2026
STL
St Louis Lambert International Airport
8h 40m
2 Stops
⏱ RDU · 0h 35mRDU Airport⏱ BWI · 1h 15mBWI Airport
18:35
06/04/2026
SEA
Seattle Tacoma International Airport
₹25,015
per person
✓ Refundable🔥 Last 2 seats4 fare options
alaskaairlines
AS-618
16:12
06/04/2026
STL
St Louis Lambert International Airport
2h 29m
Non-stop
18:41
06/04/2026
SEA
Seattle Tacoma International Airport
₹26,257
per person
✕ Non-refundable11 fare options
alaskaairlines
AS-473
06:00
06/04/2026
STL
St Louis Lambert International Airport
2h 30m
Non-stop
08:30
06/04/2026
SEA
Seattle Tacoma International Airport
₹26,257
per person
✕ Non-refundable11 fare options
Southwest Airlines
WN-824
13:55
06/04/2026
STL
St Louis Lambert International Airport
9h 35m
2 Stops
⏱ DEN · 3h 40mDEN Airport⏱ OAK · 1h 5mOAK Airport
23:30
06/04/2026
SEA
Seattle Tacoma International Airport
₹26,280
per person
✕ Non-refundable🔥 Last 1 seats4 fare options
Frontier Airlines
F9-4567
20:08
06/04/2026
STL
St Louis Lambert International Airport
17h 53m
1 Stop
⏱ DEN · 14h 19mDEN Airport
14:01
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹26,829
per person
✕ Non-refundable🔥 Last 3 seats
Southwest Airlines
WN-4359
14:20
06/04/2026
STL
St Louis Lambert International Airport
5h 50m
1 Stop
⏱ LAS · 1h 40mLAS Airport
20:10
06/04/2026
SEA
Seattle Tacoma International Airport
₹27,513
per person
✕ Non-refundable🔥 Last 2 seats9 fare options
Southwest Airlines
WN-4615
19:20
06/04/2026
STL
St Louis Lambert International Airport
6h 20m
1 Stop
⏱ PHX · 2h 15mPHX Airport
01:40
06/05/2026
+1
SEA
Seattle Tacoma International Airport
₹27,513
per person
✕ Non-refundable🔥 Last 4 seats5 fare options
Alaska Airlines
AS-6586
14:37
06/04/2026
STL
St Louis Lambert International Airport
6h 52m
1 Stop
⏱ PHX · 2h 24mPHX Airport
21:29
06/04/2026
SEA
Seattle Tacoma International Airport
₹27,676
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-236
10:00
06/04/2026
STL
St Louis Lambert International Airport
11h 30m
2 Stops
⏱ ATL · 3h 5mATL Airport⏱ PHX · 2h 0mPHX Airport
21:30
06/04/2026
SEA
Seattle Tacoma International Airport
₹28,197
per person
✕ Non-refundable🔥 Last 2 seats4 fare options
Southwest Airlines
WN-329
15:20
06/04/2026
STL
St Louis Lambert International Airport
7h 45m
2 Stops
⏱ AUS · 1h 15mAUS Airport⏱ DEN · 1h 5mDEN Airport
23:05
06/04/2026
SEA
Seattle Tacoma International Airport
₹28,197
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-3344
12:40
06/04/2026
STL
St Louis Lambert International Airport
9h 10m
2 Stops
⏱ MDW · 0h 45mMDW Airport⏱ DEN · 3h 40mDEN Airport
21:50
06/04/2026
SEA
Seattle Tacoma International Airport
₹28,197
per person
✕ Non-refundable🔥 Last 4 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 04 Jun 2026. Click View all flights for the complete live search.

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

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St. Louis Milwaukee
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St. Louis Montego Bay
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St. Louis Nashville
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St. Louis New Orleans
STL → MSY
St. Louis New York
STL → JFK
St. Louis Oklahoma City
STL → OKC
St. Louis Omaha
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St. Louis Orlando
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St. Louis Owensboro
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St. Louis Philadelphia
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St. Louis Phoenix
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St. Louis Pittsburgh International Airport
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St. Louis Puerto Vallarta
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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.