Alaska Airlines flights from STL to SEA
Find comprehensive Alaska Airlines flight information, schedules, and booking details for direct flights from STL to SEA. Alaska Airlines operates 1-2 flights daily flights on this route.• Flight Duration: 4h 15m - 4h 42m (average flight time)• Distance: 1714 miles (2758 km) (air miles between airports)• Daily Flights: 1-2 flights (scheduled departures per day)
STL
SEA
FLIGHT TIME
4h 15m - 4h 42m
FLIGHT DISTANCE
1714 miles (2758 km)
4h 38m - 4h 41m
07:00
16:15
1714 miles (2758 km)
January
1 (Show)
11
Alaska Airlines Flight Schedule from STL to SEA
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
AS473 |  Alaska Airlines | 07:00 | 09:41:00 | Boeing 737-900 (winglets) Passenger/BBJ3 |
AS388 | Alaska Airlines | 16:15 | 18:53:00 | Boeing 737-900 (winglets) Passenger/BBJ3 |
Alaska Airlines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 4h 15m - 4h 42m.
Pricing patterns: January typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 7:00, 16:00, offering more flight options and potentially better connections.
STL - SEA flight price statistics
$444
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$257
Jan$633
Feb$300
Mar$310
Apr$405
May$735
Jun$648
Jul$618
Aug$356
Sep$317
Oct$317
Nov$428
DecAlaska Airlines Terminal Information
Terminal information for Alaska Airlines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about Alaska Airlines Flights
How many Alaska Airlines flights operate from STL to SEA?
Alaska Airlines operates 2 flights from STL to SEA.
What city does SEA airport serve?
SEA airport serves SeaTac.
How long is the Alaska Airlines flight from STL to SEA?
The flight duration is approximately 4h 15m - 4h 42m.
What is the distance from STL to SEA?
The distance is 1714 miles (2758 km).
What aircraft does Alaska Airlines use on this route?
Alaska Airlines uses Boeing 737-900 (winglets) Passenger/BBJ3 on this route.
What are the earliest and latest Alaska Airlines flight departure times?
The earliest Alaska Airlines flight departs at 07:00 and the latest departs at 16:15.
What is the cheapest month to fly Alaska Airlines from STL to SEA?
January is typically the cheapest month to fly Alaska Airlines on this route.
What is the average price for a Alaska Airlines flight from STL to SEA?
The average price for a round-trip Alaska Airlines flight on this route is approximately $444. Prices can vary based on booking time and demand.
How many Alaska Airlines flights operate per week on this route?
Alaska Airlines operates approximately 11 flights per week from STL to SEA.