Trip.com
>
Flights
>
Flights to United States
>
Flights to Washington
>
Flights to Seattle
>
Flights from St. Louis to Seattle

Cheap flight deals from St. Louis to Seattle

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from St. Louis to Seattle?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
From price
Search

  • Apr

    30 6
  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from St. Louis (STL) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from St. Louis to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around PHP 18,779.

  • How long does it take to fly from St. Louis (STL) to Seattle (SEA) and what is the distance?

    It takes around 4 hours 39 minutes to fly from St. Louis (STL) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.

  • What are the most popular airlines that fly from St. Louis (STL) to Seattle (SEA)?

    Airlines with flights from St. Louis (STL) to Seattle (SEA): Qatar Airways, Alaska Airlines, Air Tahiti Nui, American Airlines, Japan Airlines, Southwest Airlines and Hawaiian Airlines.

How to find a cheap flight from St. Louis to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Seattle. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | St. Louis to Seattle

Cheapest one-way flight price PHP 4,377
Cheapest round-trip ticket price PHP 10,078
Off-season for travel March
Peak season for travel June
Flight distance 2,765.15 km
Average flight time 4 hours 39 minutes
Popular airline Alaska Airlines

More Travel Options

  • Popular Flights From St. Louis
  • Top Routes to Seattle
  • Recommended Routes