SEA to STL (Seattle to St. Louis) Flights

Last Minute Flights from SEA to STL

Best airfare and ticket deals for SEA to STL flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
SEASt. LouisApril 7 to April 13$398
*Prices include taxes and fees

Cheapest SEA to STL Flights

Best airfare and ticket deals for SEA to STL flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
SEASt. LouisApril 23 to April 24$170
SEASt. LouisApril 20 to April 23$193
SEASt. LouisApril 27 to May 4$215
PAESt. LouisApril 23 to April 30$548
*Prices include taxes and fees
SEA to STL Flight Details
Origin airport
Seattle - Tacoma Intl.
Origin airport IATA code
SEA
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Distance
1705 mi

Frequently asked questions

Which airlines with flights from Seattle - Tacoma International Airport to STL allow free cancellation due to COVID-19?
It’s easy to find airfares with cancellation flexibility due to COVID-19. After you’ve entered your travel dates, simply click on the “No change fee” box. You’ll find it right under the “Flexible change policies” heading on the left. As always, be sure to read through the airline’s terms and conditions thoroughly before locking in your seats from Seattle - Tacoma International Airport to Lambert-St. Louis International Airport.
What airlines fly direct from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to STL?
Fly with Southwest Airlines (WN). It operates 30 flights per month that jet straight from SEA to STL. With 30 nonstop monthly flights of its own on this route, Alaska Airlines (AS) is another carrier to bear in mind.
How many flights are there from SEA to STL?
About 111 flights are available per day between Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) and St. Louis, MO Airport (STL-Lambert-St. Louis Intl.). Buckle up because your plane to St. Louis is ready to go.
How long does it take to fly from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.)?
Roughly 5 hours and 50 minutes. Booked on a daytime flight? Request a seat next to the window and take in the changing views. Or, if you’re jetting from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) at night, catch some z’s and arrive in St. Louis feeling refreshed and rested.
What is the flight distance from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.)?
At a distance of 1700 miles (2700 km), you’ll be cruising at altitude for a while during this medium-haul flight. Need legroom? Ask for an aisle seat. Otherwise, take the window and gaze out at the views between Seattle and St. Louis.
How many morning flights are there from SEA to STL?
Set your alarm and get ready to take off aboard one of the 385 morning flights from SEA to STL available every week.
  • If you want to jet off with Delta (DL), it offers 89 weekly flights that take off before noon. The 12:50AM flight is the first of the day.
  • Another top option is Alaska Airlines. This airline has 82 early flights per week. 6:00AM is the earliest.
  • You’ll have approximately 79 morning flights to select from if you book a ticket with Southwest Airlines (WN). 5:20AM is the earliest available.
How many afternoon flights are there from SEA to STL?
With 393 afternoon and evening flights from SEA to STL every week, you can forget all about hauling yourself out of bed at the crack of dawn.
  • Southwest Airlines (WN) has 93 weekly flights that leave after midday. The earliest departs at 12:05PM.
  • Alaska Airlines (AS) has 88 afternoon and evening flights a week. The first is scheduled for 12:37PM.
  • Alternatively, get up and go with United Airlines (UA). This airline has 69 flights per week after midday, with the earliest departing at 12:35PM.
What is the earliest departure time out of Seattle to St. Louis?
The earliest flight jets off from SEA at 12:30AM and lands at 6:28PM at STL. Remember to allow yourself adequate time in the morning to easily get to your departure gate.
What is the latest departure time out of Seattle to St. Louis?
The latest flight departs SEA at 11:59PM and touches down at 10:40PM at STL. You’ll have adequate time to get ready for this trip.
What is the average price from Seattle to St. Louis?
You can find a return airfare from SEA to STL starting from around $170. The best fares disappear fast, so book as soon as you’ve locked in your travel dates. 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.

Seattle to St. Louis Flights

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

We present you with some of the hottest deals on airfare so stop that Google flights search. We want you to spend less on your flight from Seattle to St. Louis, 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.