STL to SEA (St. Louis to Seattle) Flights

Last Minute Flights from STL to SEA

Price found within the past 7 days for the specified period. Click for updated prices.

Cheapest STL to SEA Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
STLSeattleApril 27 to May 20$195
STLSeattleJune 2 to June 4$239
STLSeattleJune 1 to June 2$244
STLSeattleMay 7 to May 10$249
STLSeattleMay 8 to May 13$263
*Prices include taxes and fees
STL to SEA Flight Details
Origin airport
Lambert-St. Louis Intl.
Origin airport IATA code
STL
Destination airport
Seattle - Tacoma Intl.
Destination airport IATA code
SEA
Distance
1705 mi

Frequently asked questions

What airlines fly direct from Lambert Field to Seattle - Tacoma Intl. Airport (SEA)?
Enjoy a hassle-free journey from takeoff to touchdown on board Alaska Airlines (AS). This leading carrier advertises 60 nonstop flights on the route from STL to SEA every month.
How many flights are there from STL to SEA?
No less than 62 flights operate every day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Fasten your safety belt because your plane to SeaTac is ready to take off.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
While you won't be confined to your seat for hours and hours from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), 7 hours and 28 minutes isn't exactly a short hop either. Think about upgrading your fare if you'd prefer a few extra inches of space in front of you.
What is the flight distance from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Some 1,700 miles (2,700 1). If you fly regularly and have accrued a decent amount of air miles, this medium-haul journey may be the time to use them for an upgrade.
How many morning flights are there from STL to SEA?
With 235 morning flights each week from STL to SEA to take your pick of, you'll be jumping out of bed and taking to the skies in no time at all.

  • American Airlines (AA) offers around 95 weekly flights taking off before midday. The earliest one you can catch is 5:00AM.
  • United Airlines (UA) is another top option to consider. It offers 60 morning flights, with the earliest scheduled for takeoff at 6:00AM.
  • Book an airfare with Delta Air Lines (DL) and you'll have approximately 59 morning flights to pick from. The earliest departure time from STL is 5:36AM.

How many afternoon flights are there from STL to SEA?
With 199 afternoon and evening flights from STL to SEA every week, you can forget all about dragging yourself out of bed at the crack of dawn.

  • American Airlines (AA) offers 72 weekly services that leave after midday. The earliest departs at 12:03PM.
  • If you'd prefer to lock in a seat with Delta Air Lines (DL), check out the 55 weekly afternoon and evening flights that jet off from 12:00PM onward.
  • Or, fly out from 12:20PM onward with United Airlines (UA). This airline offers 51 afternoon and evening flights each week.

What is the earliest departure time out of St. Louis to SeaTac?
5:00AM is the first flight that takes off from STL, touching down at SEA at 1:49AM. Save time in the morning by having your bags packed and ready to be bundled into your ride.
What is the latest departure time out of St. Louis to SeaTac?
Book a ticket for the 10:59PM flight from STL, landing at 8:00PM at SEA, and allow yourself time to attend to any last-minute vacation preparations. This is the latest flight available on this route.
What is the average price from St. Louis to SeaTac?
Round-trip journeys between STL and SEA begin from around $195. When you're ready to take to the skies, we'll help you score the best possible price. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

St. Louis to Seattle Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from St. Louis to Seattle to attend your cousin’s wedding, to pitch a business idea to your boss, or simply treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find our cheapest flights from STL to SEA, we’ve got you covered here at Flights.com.

We present you with some of the most affordable deals on airfare, so stop that Google flights search. We want you to spend less on your flight from St. Louis to Seattle, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.

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