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.

$109 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

Sat, Oct 24 - Sat, Oct 31

7:28 am - 3:43 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

10h 15m1 stop Chicago O'Hare Intl

3:14 pm - 12:19 amSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 05m1 stop Chicago O'Hare Intl

$217American Airlines

Wed, Nov 4 - Wed, Nov 18

5:00 am - 11:12 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 12m1 stop Dallas/Fort Worth

12:47 pm - 11:33 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

8h 46m1 stop Dallas/Fort Worth

$217American Airlines

Wed, Oct 28 - Sat, Oct 31

7:45 am - 12:52 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

7h 07m1 stop Salt Lake City

6:00 am - 3:37 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 37m1 stop Detroit Metropolitan Wayne County

$217Delta

Wed, Mar 3 - Mon, Mar 8

6:45 am - 2:23 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 38m1 stop Detroit Metropolitan Wayne County

6:05 am - 2:31 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 26m1 stop Minneapolis St Paul

$222Delta

Wed, Nov 4 - Wed, Nov 18

11:20 am - 6:40 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 20m2 stops Denver Intl Sacramento Intl

11:20 am - 10:00 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

8h 40m1 stop Chicago Midway

$222Southwest

Wed, Oct 28 - Sat, Oct 31

5:20 am - 1:35 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

10h 15m2 stops Las Vegas Harry Reid Intl Sacramento Intl

7:40 am - 6:45 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

9h 05m1 stop Phoenix Sky Harbor Intl

$222Southwest

Tue, Jan 12 - Wed, Jan 20

3:00 pm - 9:12 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 12m1 stop Denver Intl

7:00 am - 4:53 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 53m1 stop Chicago O'Hare Intl

$227United Airlines

Sun, Nov 1 - Wed, Nov 4

8:00 am - 2:39 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 39m1 stop San Francisco

9:05 am - 6:05 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

7h 00m1 stop San Francisco

$227United Airlines

Fri, Oct 16 - Tue, Oct 20

8:43 pm - 3:12 pmMCI Kansas City-SEA Seattle/Tacoma Intl

20h 29m1 stop Denver Intl

4:27 pm - 7:48 pmSEA Seattle/Tacoma Intl-MCI Kansas City

25h 21m1 stop Denver Intl

$269Frontier

Thu, Dec 10 - Mon, Dec 14

3:37 pm - 1:02 pmMCI Kansas City-SEA Seattle/Tacoma Intl

23h 25m1 stop Las Vegas Harry Reid Intl

4:58 pm - 7:35 pmSEA Seattle/Tacoma Intl-MCI Kansas City

24h 37m1 stop Denver Intl

$272Frontier

Recent last minute flight deals from Missouri to Seattle

Sun, Sep 27 - Wed, Oct 21

10:30 pm - 6:28 pmMCI Kansas City-SEA Seattle/Tacoma Intl

21h 58m1 stop Las Vegas Harry Reid Intl

4:27 pm - 7:48 pmSEA Seattle/Tacoma Intl-MCI Kansas City

25h 21m1 stop Denver Intl

$423Frontier

Fri, Oct 2 - Mon, Oct 5

8:32 pm - 3:08 pmMCI Kansas City-SEA Seattle/Tacoma Intl

20h 36m1 stop Denver Intl

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

25h 10m1 stop Denver Intl

$424Frontier

Wed, Sep 30 - Mon, Oct 5

5:43 am - 11:11 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

7h 28m1 stop Dallas/Fort Worth

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

7h 16m1 stop Dallas/Fort Worth

$451American Airlines

Fri, Oct 2 - Sun, Oct 4

7:21 am - 12:50 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

7h 29m1 stop Chicago O'Hare Intl

5:00 am - 3:46 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

8h 46m1 stop Charlotte Douglas

$451American Airlines

Wed, Sep 30 - Fri, Oct 9

6:08 pm - 10:39 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

6h 31m1 stop Portland

4:27 pm - 6:57 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

24h 30m1 stop Denver Intl

$466Multiple Airlines

Sun, Sep 27 - Tue, Oct 27

10:30 pm - 9:42 amMCI Kansas City-SEA Seattle/Tacoma Intl

13h 12m1 stop Las Vegas Harry Reid Intl

8:40 am - 5:18 pmSEA Seattle/Tacoma Intl-MCI Kansas City

6h 38m1 stop Portland

$499Multiple Airlines

Tue, Sep 29 - Mon, Oct 5

11:15 am - 6:52 pmCOU Columbia Regional-SEA Seattle/Tacoma Intl

9h 37m1 stop Chicago O'Hare Intl

1:56 pm - 10:55 pmSEA Seattle/Tacoma Intl-COU Columbia Regional

6h 59m1 stop Chicago O'Hare Intl

$537United Airlines

Sat, Oct 3 - Sat, Oct 10

1:50 pm - 8:00 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

8h 10m1 stop Phoenix Sky Harbor Intl

12:00 pm - 11:40 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

9h 40m1 stop Phoenix Sky Harbor Intl

$541Southwest

Tue, Sep 29 - Mon, Oct 5

9:00 am - 9:01 pmCOU Columbia Regional-SEA Seattle/Tacoma Intl

14h 01m2 stops Denver Intl San Francisco

1:56 pm - 10:55 pmSEA Seattle/Tacoma Intl-COU Columbia Regional

6h 59m1 stop Chicago O'Hare Intl

$543United Airlines

Sat, Oct 3 - Sat, Oct 10

1:50 pm - 9:40 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

9h 50m2 stops Dallas Love Field Denver Intl

12:00 pm - 8:45 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

6h 45m1 stop Phoenix Sky Harbor Intl

$546Southwest

Recent direct flight deals from Missouri to Seattle

Tue, Oct 27 - Tue, Oct 27

7:02 am - 9:35 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 33mnonstop

6:03 pm - 11:59 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

3h 56mnonstop

$377Alaska Airlines

Wed, Oct 28 - Sat, Oct 31

7:02 am - 9:35 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 33mnonstop

9:40 am - 3:44 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 04mnonstop

$377Alaska Airlines

Tue, Oct 27 - Sat, Nov 7

4:42 pm - 7:10 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 28mnonstop

9:25 am - 3:21 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

3h 56mnonstop

$377Alaska Airlines

Tue, Feb 9 - Tue, Feb 16

7:30 am - 9:42 amMCI Kansas City-SEA Seattle/Tacoma Intl

4h 12mnonstop

5:30 pm - 11:00 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 30mnonstop

$442Delta

Sat, Nov 14 - Tue, Nov 17

6:00 am - 8:36 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 36mnonstop

8:22 am - 2:25 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 03mnonstop

$457American Airlines

Sat, Oct 24 - Sat, Oct 31

4:42 pm - 7:10 pmSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 28mnonstop

9:40 am - 3:44 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 04mnonstop

$457American Airlines

Sun, Nov 1 - Tue, Nov 3

6:00 am - 8:36 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 36mnonstop

8:22 am - 2:25 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 03mnonstop

$477American Airlines

Tue, Dec 15 - Tue, Dec 29

7:00 am - 9:21 amMCI Kansas City-SEA Seattle/Tacoma Intl

4h 21mnonstop

6:20 pm - 11:51 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 31mnonstop

$487Delta

Fri, Oct 30 - Mon, Nov 2

7:00 am - 9:04 amMCI Kansas City-SEA Seattle/Tacoma Intl

4h 04mnonstop

5:55 pm - 11:31 pmSEA Seattle/Tacoma Intl-MCI Kansas City

3h 36mnonstop

$487Delta

Fri, Nov 6 - Sun, Nov 8

6:00 am - 8:36 amSTL Lambert-St Louis-SEA Seattle/Tacoma Intl

4h 36mnonstop

8:22 am - 2:25 pmSEA Seattle/Tacoma Intl-STL Lambert-St Louis

4h 03mnonstop

$496Multiple Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$109

Best time to beat the crowds with an average 26% 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

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$109 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?

More options for your flight to Seattle

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

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Missouri

Find direct flights for Seattle

Flights from domestic origins to Seattle

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Find deals for your return flight