Route guide
Cheap Flights from Seattle to St. Louis: Book Airline Tickets
- Distance
- about 1,710 mi
- Typical flight time
- 3 h 45 min – 4 h 45 min
- Airports
- 1 × 1
- Time difference
- 2 h ahead
This page covers the practical side of flying between Seattle and St. Louis: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Seattle to St. Louis is about 1,710 miles (2,750 km) and a typical flight takes 3 h 45 min to 4 h 45 min. St. Louis is 2 hours ahead of Seattle. Seattle has 1 airport to compare and St. Louis has 1.
Airport pairs to compare
Seattle's airport is connected to downtown by light rail, which makes arrival simple even at busy times. St. Louis has one main airport with a light rail link to downtown.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| SEA to STL | Seattle-Tacoma International | St. Louis Lambert International |
About the airports
- SEA · Seattle-Tacoma International
Connected to downtown by Link light rail. - STL · St. Louis Lambert International
The main airport, northwest of downtown and linked to the city by MetroLink light rail.
Airlines with a major base at either end
- At Seattle: Delta Air Lines, Alaska Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Seattle
July through September is the driest and busiest period. From November to March it is rainy, and fares are often lower.
St. Louis
Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice.
How long is Seattle to St. Louis?
At about 1,710 miles, Seattle to St. Louis is a long domestic-style flight of several hours. Meal options, seat choice and baggage rules matter more on a trip this long, so compare the full total rather than just the base fare.
Time zones and timing
St. Louis is 2 hours ahead of Seattle, so you land at a local time 2 hours later than departure time plus flight time would suggest. Plan your arrival day around local time at the destination.
Getting between the airport and town
Seattle: Link light rail runs from the airport to downtown in roughly 40 minutes.
St. Louis: MetroLink light rail runs from the airport to downtown St. Louis. Taxis, ride-hail and rental cars are also available.
Planning ground transport too? See our car rental guide.
Good to know
- Alaska cruises depart from the city roughly from spring through early fall, which can lift demand and hotel prices at that time.
- Winter storms and summer thunderstorms are the usual causes of delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying St. Louis to Seattle?
This route guide works in both directions. For other trips, see all flights from Seattle or all flights from St. Louis.
Frequently asked questions
How far is Seattle from St. Louis?
The straight-line distance between the main airports is about 1,710 miles (2,750 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Seattle to St. Louis?
A typical scheduled flight takes roughly 3 h 45 min to 4 h 45 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Seattle: SEA (Seattle-Tacoma International). At St. Louis: STL (St. Louis Lambert International). Ask for prices on more than one pairing.
Is there a time difference?
St. Louis is 2 hours ahead of Seattle.
When is the best time to fly from Seattle to St. Louis?
In Seattle: July through September is the driest and busiest period. From November to March it is rainy, and fares are often lower. In St. Louis: Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Seattle to St. Louis?
Airlines with a major base at either end include Delta Air Lines and Alaska Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.