HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Missouri

$57+ Cheap flights from Seattle (SEA) to Missouri

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Missouri with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Missouri

Keep the following information in mind while searching for Seattle to Missouri flight deals. Data was last updated September 11, 2025.

Round-trip from

$171
(Southwest)

One-way from

$57
(Southwest)

Popular in

May

Cheapest in

January

Average price

$294

Good round-trip deal

$237 or less

Good one-way deal

$188 or less
From Seattle/Tacoma Intl to Missouri
Search Deals
One-way flight from Seattle/Tacoma Intl to Missouri
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Missouri.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Missouri.
Search Deals

Find flight deals from Seattle to Missouri

Cheapest flights from Seattle to Missouri
Explore the most affordable flight options available from Seattle to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/249:35 amSEA - STL
2 stops7h 45mSouthwest
Tue 10/288:45 amSTL - SEA
1 stop9h 40mSouthwest
Deal found 9/10$171
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:00 amSEA - STL
1 stop24h 06mFrontier
Mon 10/69:29 pmSTL - SEA
2 stops16h 38mFrontier
Deal found 9/9$172
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/124:11 pmSEA - STL
2 stops14h 56mFrontier
Tue 10/147:52 pmSTL - SEA
1 stop18h 15mFrontier
Deal found 9/9$173
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:45 amSEA - STL
1 stop9h 15mSouthwest
Tue 11/42:25 pmSTL - SEA
2 stops10h 30mSouthwest
Deal found 9/10$174
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:22 pmSEA - STL
1 stop16h 45mFrontier
Fri 11/147:45 pmSTL - SEA
1 stop18h 28mFrontier
Deal found 9/9$175
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:00 pmSEA - STL
1 stop5h 24mDelta
Thu 10/237:30 pmSTL - SEA
1 stop6h 29mDelta
Deal found 9/11$177
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:00 amSEA - STL
1 stop7h 31mDelta
Wed 11/125:34 pmSTL - SEA
1 stop8h 25mDelta
Deal found 9/9$178
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:35 pmSEA - STL
1 stop7h 32mDelta
Sat 11/156:50 amSTL - SEA
1 stop8h 06mDelta
Deal found 9/9$179
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:00 amSEA - STL
1 stop24h 06mFrontier
Sun 10/510:39 amSTL - SEA
2 stops27h 02mFrontier
Deal found 9/10$180
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:12 amSEA - STL
1 stop24h 54mFrontier
Tue 10/77:52 pmSTL - SEA
2 stops25h 56mFrontier
Deal found 9/10$181
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:00 amSEA - STL
1 stop24h 06mFrontier
Sat 10/117:52 pmSTL - SEA
1 stop13h 41mFrontier
Deal found 9/10$182
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:58 pmSEA - STL
1 stop18h 09mFrontier
Sat 11/157:45 pmSTL - SEA
2 stops19h 52mFrontier
Deal found 9/9$183

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Seattle to Missouri that are best for you.

Fly from

Seattle

Fly to

Missouri

Route

Depart

Return

Price

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 10/22

1:20 pm-12:10 am

2 stops8h 50m

Lambert-St Louis

Tue 10/28

3:00 pm-10:55 pm

1 stop9h 55m

$172

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 11/1

5:45 am-5:00 pm

1 stop9h 15m

Lambert-St Louis

Tue 11/4

2:25 pm-10:55 pm

2 stops10h 30m

$174

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 10/2

11:40 pm-8:37 am

1 stop6h 57m

Lambert-St Louis

Mon 10/6

5:31 pm-11:57 pm

1 stop8h 26m

$177

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 10/25

6:00 am-3:31 pm

1 stop7h 31m

Lambert-St Louis

Sat 11/1

5:30 pm-10:22 pm

1 stop6h 52m

$177

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 11/15

6:00 am-4:49 pm

1 stop8h 49m

Lambert-St Louis

Mon 11/17

7:47 pm-12:11 am

1 stop6h 24m

$177

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 11/7

1:30 pm-12:24 am

1 stop8h 54m

Lambert-St Louis

Tue 11/11

6:50 am-12:56 pm

1 stop8h 06m

$177

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 10/29

12:50 pm-11:10 pm

2 stops8h 20m

Lambert-St Louis

Fri 10/31

3:15 pm-8:30 pm

1 stop7h 15m

$194

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 9/24

11:10 pm-7:40 am

1 stop6h 30m

Lambert-St Louis

Wed 10/8

5:40 am-11:45 am

1 stop8h 05m

$195

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 10/1

7:00 am-3:44 pm

1 stop6h 44m

Lambert-St Louis

Sun 10/5

5:00 am-9:43 am

1 stop6h 43m

$202

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Thu 11/13

5:50 am-2:40 pm

1 stop6h 50m

Kansas City

Sat 11/15

3:25 pm-8:20 pm

1 stop6h 55m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 58 results
1
2
3
...
6

Best time to book a flight from Seattle to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Missouri

What is the cheapest month to book a flight from Seattle to Missouri?

Currently, August is the cheapest month in which you can book a flight from Seattle to Missouri (average of $311). Flying from Seattle to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to MO?

Find hourly flight availability from Seattle to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Missouri as you normally would.

Weekly flight availability from Seattle to Missouri

Explore weekly flight availability from Seattle to Missouri. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from SEA to USMO are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated September 11, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to Missouri have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Missouri?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Missouri.

  • How popular is this Seattle to Missouri flight route?

    This flight path from Seattle/Tacoma Intl to Missouri was viewed by 5 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Missouri?

    Southwest, Delta, and American Airlines can get you from Seattle to Missouri in just under 5h 58m. Your travel time can differ by up to 2h 52m. The distance between Seattle and Missouri is about 1623 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Seattle to Missouri one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $69. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from Seattle to Missouri for a low price.

  • What are the most popular routes from Seattle to Missouri?

    When deciding which route to take from Seattle to Missouri consider Seattle/Tacoma Intl - Lambert-St Louis, Seattle/Tacoma Intl - Kansas City or Seattle/Tacoma Intl - Springfield-Branson as they are the most popular.

  • What are the most reliable airlines from Seattle to Missouri?

    No one likes to see their flight delayed. When booking a flight from Seattle to Missouri consider choosing Alaska Airlines (75%), Hawaiian Airlines (75%) or Air Tahiti Nui (69%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Missouri?

    Looking at all options, your cheapest flight can be booked for $128. While the most popular route (Seattle/Tacoma Intl - Lambert-St Louis) can be booked for $137 on average, our data indicates $366 when flying from Seattle to Missouri.

  • Can I find deals for flights from Seattle to Missouri that include hotel bookings?

    Yes. In addition to deals on Seattle to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Missouri?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Missouri.

  • Can I find deals for business class flights from Seattle to Missouri?

    Yes. Cheapflights offers flight deals from Seattle to Missouri by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Missouri?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Missouri (average of $311). Flying from Seattle to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Las Vegas flights
Seattle to Los Angeles flights
Seattle to Dallas/Fort Worth flights
Seattle to Sky Harbor Intl flights
Seattle to John F Kennedy Intl flights
Seattle to Ontario flights
Seattle to San Diego flights
Seattle to San Francisco flights
Seattle to Honolulu flights
Seattle to O'Hare Intl flights
Portland to Los Angeles flights
Seattle to Denver flights
Seattle to Santa Ana flights
Seattle to Dulles Intl flights
Seattle to Orlando flights
Portland to Las Vegas flights
Seattle to Newark flights
Seattle to Nashville flights
Everett to Las Vegas flights
Seattle to Boston flights
Seattle to LaGuardia flights
Seattle to Kahului flights
Seattle to Atlanta flights
Seattle to Reagan-National flights
Seattle to Hobby flights
Portland to Ontario flights
Seattle to Salt Lake City flights
Portland to Sky Harbor Intl flights
Seattle to Baltimore flights
Seattle to Austin flights
Seattle to Miami flights
Portland to John F Kennedy Intl flights
Portland to Dallas/Fort Worth flights
Portland to O'Hare Intl flights
Portland to San Francisco flights
Seattle to Palm Springs flights
Seattle to San Jose flights
Seattle to George Bush Intcntl flights
Seattle to New Orleans flights
Portland to Newark flights
Seattle to Kailua-Kona flights
Seattle to Philadelphia flights
Portland to Honolulu flights
Portland to Denver flights
Portland to Santa Ana flights
Seattle to Detroit flights
Seattle to Midway flights
Seattle to Lihue flights
Everett to Sky Harbor Intl flights
Portland to Boston flights

Top 8 airlines flying from Seattle to Missouri

Discover the top 8 airlines that operate flights from Seattle to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$137Average$323FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$168Average$310FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$178Average$396FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$186Average$525FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$188Average$405FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$453FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$223Average$419FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.