Seattle (SEA) to St. Louis (STL) Flights from ₹12,927
Fares on this route currently start from ₹12,927. Compare live SEA to STL 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.
SEA → STLApprox. 2744.34 km04 Jun 2026Live inventory
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Showing 25
of 151
live flights
Frontier Airlines
F9-2408
20:20
06/04/2026
SEA
Seattle Tacoma International Airport
23h 51m
1 Stop
⏱ LAS · 15h 44mLAS Airport
20:11
06/05/2026
+1
STL
St Louis Lambert International Airport
₹12,927
per person
✕ Non-refundable
American Airlines
AA-2524
15:05
06/04/2026
SEA
Seattle Tacoma International Airport
9h 11m
1 Stop
⏱ ORD · 1h 27mORD Airport
00:16
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,226
per person
✕ Non-refundable21 fare options
American Airlines
AA-1667
07:31
06/04/2026
SEA
Seattle Tacoma International Airport
10h 59m
1 Stop
⏱ DFW · 3h 14mDFW Airport
18:30
06/04/2026
STL
St Louis Lambert International Airport
₹13,226
per person
✓ Refundable21 fare options
American Airlines
AA-2003
23:24
06/04/2026
SEA
Seattle Tacoma International Airport
9h 26m
1 Stop
⏱ DFW · 1h 42mDFW Airport
08:50
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,226
per person
✓ Refundable18 fare options
American Airlines
AA-2520
13:58
06/04/2026
SEA
Seattle Tacoma International Airport
10h 18m
1 Stop
⏱ ORD · 2h 34mORD Airport
00:16
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,226
per person
✓ Refundable16 fare options
American Airlines
AA-2881
23:58
06/04/2026
SEA
Seattle Tacoma International Airport
8h 33m
1 Stop
⏱ ORD · 1h 6mORD Airport
08:31
06/05/2026
+1
STL
St Louis Lambert International Airport
₹17,970
per person
✓ Refundable21 fare options
American Airlines
AA-3440
15:20
06/04/2026
SEA
Seattle Tacoma International Airport
8h 37m
1 Stop
⏱ PHX · 0h 29mPHX Airport
23:57
06/04/2026
STL
St Louis Lambert International Airport
₹17,970
per person
✓ Refundable21 fare options
American Airlines
AA-717
14:03
06/04/2026
SEA
Seattle Tacoma International Airport
9h 56m
1 Stop
⏱ DFW · 1h 58mDFW Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹17,970
per person
✓ Refundable18 fare options
alaskaairlines
AS-647
12:45
06/04/2026
SEA
Seattle Tacoma International Airport
6h 0m
Non-stop
18:45
06/04/2026
STL
St Louis Lambert International Airport
₹18,250
per person
✕ Non-refundable11 fare options
alaskaairlines
AS-615
17:52
06/04/2026
SEA
Seattle Tacoma International Airport
6h 2m
Non-stop
23:54
06/04/2026
STL
St Louis Lambert International Airport
₹18,250
per person
✕ Non-refundable11 fare options
Delta Air Lines
DL-1265
10:59
06/04/2026
SEA
Seattle Tacoma International Airport
8h 4m
1 Stop
⏱ SLC · 1h 3mSLC Airport
19:03
06/04/2026
STL
St Louis Lambert International Airport
₹18,565
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-812
05:30
06/04/2026
SEA
Seattle Tacoma International Airport
11h 46m
1 Stop
⏱ DTW · 3h 46mDTW Airport
17:16
06/04/2026
STL
St Louis Lambert International Airport
₹18,565
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-943
06:00
06/04/2026
SEA
Seattle Tacoma International Airport
8h 31m
1 Stop
⏱ MSP · 1h 27mMSP Airport
14:31
06/04/2026
STL
St Louis Lambert International Airport
₹18,721
per person
✕ Non-refundable7 fare options
Southwest Airlines
WN-3354
17:20
06/04/2026
SEA
Seattle Tacoma International Airport
8h 30m
Non-stop
01:50
06/05/2026
+1
STL
St Louis Lambert International Airport
₹18,758
per person
✕ Non-refundable🔥 Last 1 seats10 fare options
Southwest Airlines
WN-2810
05:30
06/04/2026
SEA
Seattle Tacoma International Airport
8h 40m
1 Stop
⏱ MDW · 1h 35mMDW Airport
14:10
06/04/2026
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable14 fare options
Southwest Airlines
WN-2810
05:30
06/04/2026
SEA
Seattle Tacoma International Airport
10h 25m
1 Stop
⏱ MDW · 3h 20mMDW Airport
15:55
06/04/2026
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable14 fare options
Southwest Airlines
WN-2304
23:05
06/04/2026
SEA
Seattle Tacoma International Airport
10h 5m
1 Stop
⏱ MDW · 2h 50mMDW Airport
09:10
06/05/2026
+1
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable9 fare options
Southwest Airlines
WN-3081
11:45
06/04/2026
SEA
Seattle Tacoma International Airport
11h 5m
1 Stop
⏱ MDW · 3h 35mMDW Airport
22:50
06/04/2026
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable9 fare options
Southwest Airlines
WN-536
22:45
06/04/2026
SEA
Seattle Tacoma International Airport
8h 45m
1 Stop
⏱ BNA · 1h 10mBNA Airport
07:30
06/05/2026
+1
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-3620
12:45
06/04/2026
SEA
Seattle Tacoma International Airport
11h 25m
1 Stop
⏱ LAS · 3h 40mLAS Airport
00:10
06/05/2026
+1
STL
St Louis Lambert International Airport
₹18,924
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-3617
14:35
06/04/2026
SEA
Seattle Tacoma International Airport
8h 5m
1 Stop
⏱ DEN · 1h 10mDEN Airport
22:40
06/04/2026
STL
St Louis Lambert International Airport
₹19,365
per person
✕ Non-refundable🔥 Last 2 seats11 fare options
Southwest Airlines
WN-3617
14:35
06/04/2026
SEA
Seattle Tacoma International Airport
9h 20m
1 Stop
⏱ DEN · 2h 25mDEN Airport
23:55
06/04/2026
STL
St Louis Lambert International Airport
₹19,365
per person
✕ Non-refundable🔥 Last 4 seats6 fare options
Southwest Airlines
WN-3616
12:20
06/04/2026
SEA
Seattle Tacoma International Airport
10h 20m
1 Stop
⏱ DEN · 3h 20mDEN Airport
22:40
06/04/2026
STL
St Louis Lambert International Airport
₹19,365
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-3613
21:25
06/04/2026
SEA
Seattle Tacoma International Airport
10h 5m
1 Stop
⏱ BWI · 0h 55mBWI Airport
07:30
06/05/2026
+1
STL
St Louis Lambert International Airport
₹19,365
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-3616
12:20
06/04/2026
SEA
Seattle Tacoma International Airport
11h 35m
1 Stop
⏱ DEN · 4h 35mDEN Airport
23:55
06/04/2026
STL
St Louis Lambert International Airport
₹19,470
per person
✕ Non-refundable6 fare options
😕 No flights match your filters.
Seattle (SEA)
📍 Seattle Tacoma International Airport
🌍 United States
🕐 GMT -8
📐 Latitude: 47.449001
📐 Longitude: -122.308998
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003
✈ Distance: Seattle,USA to St. Louis,USA — 2744.34 km
📅 Results on this page are loaded for 04 Jun 2026. Click View all flights for the complete live search.
Seattle to St. Louis — what to expect when booking
The SEA–STL 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 Seattle,USA and St. Louis,USA is approximately
2744.34 km.
Before you book
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❓ Frequently asked questions — Seattle to St. Louis 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 Seattle,USA (SEA) and St. Louis,USA (STL) 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.