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Cheap flights from St Louis to Seattle

17 nonstop flights a week, 1 of them today. Operated by 2 airlines, about 4h 28m in the air, 1,720 mi (2,768 km). Tickets from $240.

Flights from St Louis to Seattle

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We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

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Best fares from St Louis to Seattle

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $240 14 November 2026, nonstop Cheapest nonstop $240 14 November 2026, Southwest Airlines Cheapest in the next 7 days $240 14 November, Sat Cheapest weekend departure $240 Sat, 14 November 2026 Cheapest month November 2026 tickets from $240

St Louis to Seattle at a glance

flight time, from 4h 25m to 7h
4h 28m
straight-line distance
1,720 mi (2,768 km)
flights a week
17
flight today
1
first and last departure
05:50 - 15:23
lowest price, nonstop, 14 November
$240
airlines
2

St Louis to Seattle flight schedule

17 flights a week, 1 today, 19 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
WN 1412
Southwest Airlines
05:50 Lambert-St. Louis International, terminal 2
10:50 Seattle-Tacoma International
7h
Sat
Boeing 737
AS 615
Alaska Airlines
06:00 Lambert-St. Louis International, terminal 1
08:36 Seattle-Tacoma International
4h 36m
Daily
Boeing 737-800
AS 669
Alaska Airlines
06:00 Lambert-St. Louis International, terminal 1
08:40 Seattle-Tacoma International
4h 40m
Mon, Fri, Sat, Sun
Boeing 737-800
AS 618
Alaska Airlines
15:20 Lambert-St. Louis International, terminal 1
17:55 Seattle-Tacoma International
4h 35m
Mon, Fri, Sat, Sun
Boeing 737
AS 618
Alaska Airlines
15:23 Lambert-St. Louis International, terminal 1
17:53 Seattle-Tacoma International
4h 30m
Mon, Thu, Fri, Sun
Boeing 737-900

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 1 December.

FlightDepartsArrivesDurationDaysAircraft
AS 615
Alaska Airlines
06:04 Lambert-St. Louis International, terminal 1
08:50 Seattle-Tacoma International
4h 46m
Seasonal
Boeing 737
AS 618
Alaska Airlines
16:04 Lambert-St. Louis International, terminal 1
18:44 Seattle-Tacoma International
4h 40m
Seasonal
Boeing 737
AS 512
Alaska Airlines
06:04 Lambert-St. Louis International, terminal 1
08:46 Seattle-Tacoma International
4h 42m
Seasonal
Boeing 737-900
AS 618
Alaska Airlines
16:32 Lambert-St. Louis International, terminal 1
19:11 Seattle-Tacoma International
4h 39m
Seasonal
Boeing 737-900
AS 618
Alaska Airlines
15:54 Lambert-St. Louis International, terminal 1
18:26 Seattle-Tacoma International
4h 32m
Seasonal
Boeing 737-900
AS 618
Alaska Airlines
15:04 Lambert-St. Louis International, terminal 1
17:32 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
AS 348
Alaska Airlines
07:00 Lambert-St. Louis International, terminal 1
09:28 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
AS 647
Alaska Airlines
15:24 Lambert-St. Louis International, terminal 1
17:52 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
WN 1417
Southwest Airlines
05:10 Lambert-St. Louis International, terminal 2
09:55 Seattle-Tacoma International
6h 45m
Seasonal
Boeing 737-800
AS 388
Alaska Airlines
15:24 Lambert-St. Louis International, terminal 1
17:52 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
AS 348
Alaska Airlines
06:00 Lambert-St. Louis International, terminal 1
08:28 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
AS 388
Alaska Airlines
16:12 Lambert-St. Louis International, terminal 1
18:40 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
AS 329
Alaska Airlines
19:41 Lambert-St. Louis International, terminal 1
22:09 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900
WN 3964
Southwest Airlines
13:15 Lambert-St. Louis International, terminal 2
15:40 Seattle-Tacoma International
4h 25m
Seasonal
WN 2544
Southwest Airlines
10:20 Lambert-St. Louis International, terminal 2
12:45 Seattle-Tacoma International
4h 25m
Seasonal
Boeing 737
WN 4670
Southwest Airlines
21:45 Lambert-St. Louis International, terminal 2
00:10 Seattle-Tacoma International
4h 25m
Seasonal
WN 3964
Southwest Airlines
17:00 Lambert-St. Louis International, terminal 2
19:25 Seattle-Tacoma International
4h 25m
Seasonal
Boeing 737
WN 3818
Southwest Airlines
17:55 Lambert-St. Louis International, terminal 2
20:20 Seattle-Tacoma International
4h 25m
Seasonal
Boeing 737
AS 329
Alaska Airlines
19:32 Lambert-St. Louis International, terminal 1
22:00 Seattle-Tacoma International
4h 28m
Seasonal
Boeing 737-900

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Seattle is 2 hours behind St Louis. The search shows seat availability and the price for your date.

Airlines flying St Louis to Seattle

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Alaska Airlines16 a week Southwest Airlines1 a week

Airports

Where flights from St Louis to Seattle depart and land

Departure from St Louis

Lambert-St. Louis International STL

17 flights a week, terminals 1, 2, 12 mi (19 km) from the city centre

About the airport

Arrival in Seattle

Seattle-Tacoma International SEA

17 flights a week, 11 mi (18 km) from the city centre

About the airport

When to visit Seattle

Weather by month

Best time to visit: May, June, July, August and September, +17° to +25° by day. In November it is +10° by day and +5° at night, with 17 rainy days.

Jan
+8° +2° 16 days
Feb
+8° +2° 14 days
Mar
+11° +4° 15 days
Apr
+13° +6° 14 days
May
+17° +9° 11 days
Jun
+21° +12° 7 days
Jul
+25° +15° 1 days
Aug
+25° +15° 6 days
Sep
+21° +13° 7 days
Oct
+15° +9° 14 days
Nov
+10° +5° 17 days
Dec
+8° +4° 20 days

Daytime and night temperatures in °C, rainy days. Months with the most comfortable weather are in green. Long-term averages.

Frequently asked questions

How long is the flight from St Louis to Seattle?
A nonstop flight takes 4 hours 28 minutes on average, from 4h 25m to 7h depending on the flight.
How far is Seattle from St Louis?
1,720 mi (2,768 km) in a straight line between the cities.
Which airlines fly nonstop from St Louis to Seattle?
Alaska Airlines (16 a week) and Southwest Airlines (1 a week).
How many flights a day are there from St Louis to Seattle?
1 flight today and 17 a week, about 2.4 a day on average.
When are the first and last flights from St Louis to Seattle?
The first departure is at 05:50 (WN1412), the last at 15:23 (AS618). Local time.
What is the cheapest upcoming date to fly from St Louis to Seattle?
14 November 2026 (Saturday): from $240 one way, nonstop, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from St Louis to Seattle?
Southwest Airlines: nonstop tickets from $240 on 14 November by recent searches. Prices change daily, so compare the sellers in the search.
What is the time difference between St Louis and Seattle?
Seattle is 2 hours behind St Louis. Schedule times on this page are local to each airport.
Which St Louis airport do flights to Seattle leave from?
Lambert-St. Louis International (17 a week).