How does KAYAK find such low prices on flights from Missouri to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Missouri is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Missouri to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Missouri with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$69 CHEAP FLIGHTS from Missouri to Seattle

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Cheap Flights from Missouri to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Missouri to Seattle

Thu, Dec 10 - Mon, Dec 14

5:30 am - 10:35 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

7h 05m1 stop Dallas Love Field

5:15 am - 9:05 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

13h 50m2 stops Sacramento Intl Dallas Love Field

$248Southwest

Sat, Sep 26 - Mon, Oct 5

8:30 am - 3:55 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 25m2 stops Omaha Eppley Airfield Las Vegas Harry Reid Intl

8:40 pm - 11:40 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

13h 00m1 stop Las Vegas Harry Reid Intl

$248Southwest

Wed, Nov 11 - Sun, Nov 15

6:00 am - 2:20 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

10h 20m1 stop Chicago O'Hare Intl

11:34 pm - 10:47 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

9h 13m1 stop Chicago O'Hare Intl

$259American Airlines

Thu, Nov 12 - Sun, Nov 15

7:26 am - 2:20 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 54m1 stop Chicago O'Hare Intl

10:43 am - 7:22 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 39m1 stop Chicago O'Hare Intl

$259American Airlines

Fri, Sep 18 - Tue, Sep 22

8:10 pm - 3:08 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

20h 58m1 stop Denver Intl

8:15 pm - 7:17 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

21h 02m2 stops Los Angeles Denver Intl

$260Frontier

Mon, Sep 28 - Tue, Sep 29

2:29 pm - 9:42 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

21h 13m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl

4:27 pm - 7:17 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

24h 50m1 stop Denver Intl

$263Frontier

Sat, Sep 19 - Sat, Oct 3

1:36 pm - 8:43 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 07m2 stops Denver Intl San Francisco

3:55 pm - 11:44 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

5h 49m1 stop Denver Intl

$271United Airlines

Mon, Nov 23 - Thu, Nov 26

1:45 pm - 11:18 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

11h 33m2 stops Denver Intl San Francisco

7:00 am - 3:43 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 43m1 stop Chicago O'Hare Intl

$289United Airlines

Fri, Oct 9 - Mon, Oct 12

7:00 pm - 11:59 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

6h 59m1 stop Salt Lake City

11:50 pm - 8:53 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 03m1 stop Minneapolis St Paul

$303Delta

Sun, Sep 20 - Mon, Oct 5

10:29 am - 6:45 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

10h 16m1 stop Detroit Metropolitan Wayne County

9:59 pm - 9:44 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

9h 45m1 stop Detroit Metropolitan Wayne County

$312Delta

Recent last minute flight deals from Missouri to Seattle

Sat, Aug 29 - Tue, Oct 20

5:13 pm - 12:13 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 00m1 stop Chicago O'Hare Intl

1:37 pm - 11:46 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

8h 09m1 stop Los Angeles

$340American Airlines

Sun, Aug 30 - Thu, Sep 24

1:38 pm - 9:19 amMCI Kansas City-SEA Seattle/Tacoma Intl

21h 41m1 stop Denver Intl

4:27 pm - 7:37 pmSEA Seattle/Tacoma Intl-MCI Kansas City

25h 10m1 stop Denver Intl

$342Frontier

Sat, Aug 29 - Wed, Oct 28

8:00 am - 12:59 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

6h 59m1 stop Salt Lake City

5:30 am - 1:32 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 02m1 stop Salt Lake City

$369Delta

Sat, Aug 29 - Wed, Sep 30

9:40 am - 3:55 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 15m1 stop Las Vegas Harry Reid Intl

5:20 am - 3:10 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 50m1 stop Chicago Midway

$369Southwest

Wed, Aug 26 - Wed, Sep 30

12:50 pm - 5:55 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

7h 05m1 stop Chicago Midway

5:20 am - 3:10 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 50m1 stop Chicago Midway

$369Southwest

Sat, Aug 29 - Tue, Oct 6

5:13 pm - 12:13 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 00m1 stop Chicago O'Hare Intl

2:26 pm - 11:42 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 16m1 stop Dallas/Fort Worth

$369American Airlines

Sun, Aug 30 - Wed, Sep 30

6:45 pm - 10:39 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

17h 54m1 stop Las Vegas Harry Reid Intl

9:45 pm - 11:17 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

11h 32m1 stop Las Vegas Harry Reid Intl

$372Frontier

Sat, Aug 29 - Thu, Oct 1

8:00 am - 12:59 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

6h 59m1 stop Salt Lake City

11:59 pm - 8:40 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 41m1 stop Minneapolis St Paul

$374Delta

Sun, Aug 30 - Wed, Sep 30

6:45 pm - 10:39 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

17h 54m1 stop Las Vegas Harry Reid Intl

8:13 am - 2:21 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 08mnonstop

$400Multiple Airlines

Sun, Aug 30 - Thu, Sep 24

4:47 pm - 10:39 amMCI Kansas City-SEA Seattle/Tacoma Intl

19h 52m1 stop Las Vegas Harry Reid Intl

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$418Multiple Airlines

Recent direct flight deals from Missouri to Seattle

Fri, Sep 25 - Tue, Sep 29

1:34 pm - 3:29 pmMCI Kansas City-SEA Seattle/Tacoma Intl

3h 55mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$331Alaska Airlines

Fri, Oct 16 - Thu, Oct 22

6:17 am - 8:20 amMCI Kansas City-SEA Seattle/Tacoma Intl

4h 03mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$331Alaska Airlines

Sat, Sep 26 - Fri, Oct 2

7:24 am - 9:15 amMCI Kansas City-SEA Seattle/Tacoma Intl

3h 51mnonstop

5:40 pm - 11:16 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 36mnonstop

$331Delta

Fri, Sep 18 - Wed, Sep 23

7:24 am - 9:15 amMCI Kansas City-SEA Seattle/Tacoma Intl

3h 51mnonstop

5:40 pm - 11:16 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 36mnonstop

$331Delta

Wed, Sep 16 - Fri, Sep 25

7:00 am - 8:57 amMCI Kansas City-SEA Seattle/Tacoma Intl

3h 57mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$331Alaska Airlines

Thu, Oct 1 - Mon, Oct 5

7:00 am - 8:57 amMCI Kansas City-SEA Seattle/Tacoma Intl

3h 57mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$407American Airlines

Thu, Sep 17 - Thu, Sep 24

7:00 am - 8:57 amMCI Kansas City-SEA Seattle/Tacoma Intl

3h 57mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$421American Airlines

Sun, Sep 6 - Thu, Sep 10

11:55 am - 2:15 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 20mnonstop

12:05 pm - 6:05 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 00mnonstop

$558Southwest

Fri, Oct 23 - Mon, Oct 26

7:00 am - 9:05 amMCI Kansas City-SEA Seattle/Tacoma Intl

4h 05mnonstop

5:00 pm - 10:25 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 25mnonstop

$589Southwest

Sun, Sep 6 - Tue, Sep 8

1:34 pm - 3:29 pmMCI Kansas City-SEA Seattle/Tacoma Intl

3h 55mnonstop

6:27 pm - 11:59 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 32mnonstop

$697Multiple Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$69

Best time to beat the crowds with an average 24% drop in price.

Most popular time to fly with an average 24% increase in price.

Flight from St. Louis to Seattle

How does KAYAK find such low prices on flights from Missouri to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Missouri is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Missouri to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Missouri with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lynnwood

Centralia

Fife

Lakewood

Westport

Lacey

Mukilteo

Woodinville

Poulsbo

Edmonds

Aberdeen

DuPont

Shoreline

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

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Complete your trip

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Information on the airport you'll fly into in Seattle

Seattle (SEA)

SEA

$69 Find Cheap Flights from Missouri to Seattle - Compare and Save

Cheap Flights from Missouri to Seattle

Recent round-trip flight deals from Missouri to Seattle

Recent one-way flight deals from Missouri to Seattle

Recent last minute flight deals from Missouri to Seattle

Recent direct flight deals from Missouri to Seattle

Good to know

Low season

High season

Cheapest flight

FAQs for booking flights from Missouri to Seattle

Traveling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Missouri

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights for Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight