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St. Louis to Seattle flight ticket price

Compare live prices for STL to SEA. Use the search panel to change origin, destination, passengers, cabin and trip type instantly.
STL → SEA Approx. 2744.34 km 08 May 2026 Live inventory
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Showing 25 of 133 live flights
Delta Air Lines
DL-2421
19:59
05/08/2026
STL
St Louis Lambert International Airport
4h 13m
1 Stop
⏱ SLC · 0h 48mSLC Airport
00:12
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹11,500
per person
✕ Non-refundable3 fare options
Delta Air Lines
DL-2455
14:27
05/08/2026
STL
St Louis Lambert International Airport
4h 21m
1 Stop
⏱ SLC · 0h 51mSLC Airport
18:48
05/08/2026
SEA
Seattle Tacoma International Airport
₹11,500
per person
✕ Non-refundable3 fare options
United Airlines
UA-1770
17:59
05/08/2026
STL
St Louis Lambert International Airport
5h 0m
1 Stop
⏱ DEN · 1h 25mDEN Airport
22:59
05/08/2026
SEA
Seattle Tacoma International Airport
₹15,540
per person
✕ Non-refundable7 fare options
American Airlines
AA-418
17:21
05/08/2026
STL
St Louis Lambert International Airport
7h 15m
1 Stop
⏱ ORD · 3h 5mORD Airport
00:36
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹16,128
per person
✕ Non-refundable8 fare options
United Airlines
UA-1729
14:35
05/08/2026
STL
St Louis Lambert International Airport
8h 54m
2 Stops
⏱ DEN · 0h 47mDEN Airport⏱ SFO · 2h 12mSFO Airport
23:29
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,631
per person
✕ Non-refundable🔥 Last 2 seats4 fare options
United Airlines
UA-4395
10:25
05/08/2026
STL
St Louis Lambert International Airport
9h 23m
2 Stops
⏱ ORD · 1h 22mORD Airport⏱ LAX · 0h 47mLAX Airport
19:48
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,631
per person
✕ Non-refundable🔥 Last 1 seats5 fare options
United Airlines
UA-4601
09:21
05/08/2026
STL
St Louis Lambert International Airport
10h 27m
2 Stops
⏱ ORD · 2h 35mORD Airport⏱ LAX · 0h 47mLAX Airport
19:48
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,631
per person
✕ Non-refundable🔥 Last 4 seats4 fare options
Southwest Airlines
WN-2952
15:00
05/08/2026
STL
St Louis Lambert International Airport
4h 5m
1 Stop
⏱ DEN · 0h 40mDEN Airport
19:05
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable🔥 Last 4 seats6 fare options
Southwest Airlines
WN-1183
14:25
05/08/2026
STL
St Louis Lambert International Airport
5h 40m
1 Stop
⏱ PHX · 1h 10mPHX Airport
20:05
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-2013
06:05
05/08/2026
STL
St Louis Lambert International Airport
6h 10m
1 Stop
⏱ PHX · 1h 35mPHX Airport
12:15
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-4459
18:45
05/08/2026
STL
St Louis Lambert International Airport
4h 45m
1 Stop
⏱ DEN · 1h 30mDEN Airport
23:30
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable🔥 Last 2 seats5 fare options
Southwest Airlines
WN-1688
17:15
05/08/2026
STL
St Louis Lambert International Airport
6h 15m
1 Stop
⏱ DEN · 3h 0mDEN Airport
23:30
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable🔥 Last 2 seats5 fare options
Southwest Airlines
WN-4473
19:20
05/08/2026
STL
St Louis Lambert International Airport
5h 20m
1 Stop
⏱ LAS · 1h 0mLAS Airport
00:40
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4472
13:30
05/08/2026
STL
St Louis Lambert International Airport
6h 55m
1 Stop
⏱ LAS · 2h 25mLAS Airport
20:25
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable🔥 Last 2 seats5 fare options
Southwest Airlines
WN-3153
06:00
05/08/2026
STL
St Louis Lambert International Airport
8h 10m
1 Stop
⏱ LAS · 3h 50mLAS Airport
14:10
05/08/2026
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable🔥 Last 4 seats5 fare options
Southwest Airlines
WN-3890
18:00
05/08/2026
STL
St Louis Lambert International Airport
6h 55m
1 Stop
⏱ PHX · 2h 30mPHX Airport
00:55
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-1764
16:40
05/08/2026
STL
St Louis Lambert International Airport
7h 25m
1 Stop
⏱ MDW · 3h 45mMDW Airport
00:05
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹16,644
per person
✕ Non-refundable5 fare options
United Airlines
UA-1729
14:35
05/08/2026
STL
St Louis Lambert International Airport
10h 37m
2 Stops
⏱ DEN · 0h 47mDEN Airport⏱ SFO · 3h 49mSFO Airport
01:12
05/09/2026
+1
SEA
Seattle Tacoma International Airport
₹16,959
per person
✕ Non-refundable🔥 Last 2 seats2 fare options
Southwest Airlines
WN-3562
11:30
05/08/2026
STL
St Louis Lambert International Airport
7h 35m
1 Stop
⏱ DEN · 4h 15mDEN Airport
19:05
05/08/2026
SEA
Seattle Tacoma International Airport
₹17,168
per person
✕ Non-refundable🔥 Last 3 seats5 fare options
Southwest Airlines
WN-2113
08:35
05/08/2026
STL
St Louis Lambert International Airport
8h 25m
1 Stop
⏱ SMF · 4h 10mSMF Airport
17:00
05/08/2026
SEA
Seattle Tacoma International Airport
₹17,168
per person
✕ Non-refundable5 fare options
Delta Air Lines
DL-1605
17:36
05/08/2026
STL
St Louis Lambert International Airport
6h 8m
1 Stop
⏱ MSP · 2h 49mMSP Airport
23:44
05/08/2026
SEA
Seattle Tacoma International Airport
₹17,697
per person
✕ Non-refundable3 fare options
American Airlines
AA-418
17:21
05/08/2026
STL
St Louis Lambert International Airport
5h 17m
1 Stop
⏱ ORD · 0h 59mORD Airport
22:38
05/08/2026
SEA
Seattle Tacoma International Airport
₹17,697
per person
✕ Non-refundable14 fare options
Southwest Airlines
WN-2940
11:35
05/08/2026
STL
St Louis Lambert International Airport
8h 30m
1 Stop
⏱ PHX · 4h 0mPHX Airport
20:05
05/08/2026
SEA
Seattle Tacoma International Airport
₹18,233
per person
✕ Non-refundable🔥 Last 3 seats5 fare options
Southwest Airlines
WN-2013
06:05
05/08/2026
STL
St Louis Lambert International Airport
8h 5m
1 Stop
⏱ PHX · 1h 55mPHX Airport
14:10
05/08/2026
SEA
Seattle Tacoma International Airport
₹18,729
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-3562
11:30
05/08/2026
STL
St Louis Lambert International Airport
8h 55m
2 Stops
⏱ DEN · 2h 40mDEN Airport⏱ LAS · 1h 5mLAS Airport
20:25
05/08/2026
SEA
Seattle Tacoma International Airport
₹18,904
per person
✕ Non-refundable🔥 Last 2 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 08 May 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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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.