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$63+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This Delta deal was found by Cheapflights users on 12/11. 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.
Fri 12/265:25 amSEA - STL
1 stop5h 58mDelta
Wed 1/75:00 pmSTL - SEA
1 stop8h 22mDelta
Deal found 12/11$243
This Delta deal was found by Cheapflights users on 12/11. 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.
Sun 12/286:00 amSEA - STL
1 stop9h 01mDelta
Wed 1/75:00 pmSTL - SEA
1 stop8h 22mDelta
Deal found 12/11$298
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
Tue 12/302:54 pmSEA - MCI
1 stop26h 56mMultiple Airlines
Tue 1/137:00 amMCI - SEA
2 stops54h 09mMultiple Airlines
Deal found 12/10$311
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:05 pmSEA - STL
Nonstop3h 54mAlaska Airlines
Tue 1/67:00 amSTL - SEA
Nonstop4h 39mAlaska Airlines
Deal found 12/11$312
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:05 pmSEA - STL
Nonstop3h 54mAlaska Airlines
Mon 1/55:26 pmSTL - SEA
Nonstop4h 33mAlaska Airlines
Deal found 12/11$322
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:33 pmSEA - STL
2 stops13h 29mFrontier
Wed 1/77:43 pmSTL - SEA
1 stop17h 38mFrontier
Deal found 12/11$324
This Delta deal was found by Cheapflights users on 12/11. 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.
Wed 12/316:00 amSEA - STL
1 stop9h 00mDelta
Tue 1/67:00 amSTL - SEA
2 stops15h 48mDelta
Deal found 12/11$327
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:15 amSEA - MCI
Nonstop3h 29mAlaska Airlines
Sun 1/44:56 pmMCI - SEA
1 stop23h 59mAlaska Airlines
Deal found 12/10$330
This Delta deal was found by Cheapflights users on 12/11. 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 12/3010:55 pmSEA - STL
1 stop8h 29mDelta
Mon 1/57:00 amSTL - SEA
1 stop7h 33mDelta
Deal found 12/11$332
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
Tue 12/301:25 pmSEA - STL
2 stops18h 37mFrontier
Thu 1/2910:01 pmSTL - SEA
1 stop13h 35mFrontier
Deal found 12/10$335
This Delta deal was found by Cheapflights users on 12/11. 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 12/305:50 pmSEA - MCI
Nonstop3h 32mDelta
Tue 1/137:00 amMCI - SEA
Nonstop4h 06mDelta
Deal found 12/11$337
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/242:46 pmSEA - STL
1 stop23h 38mFrontier
Wed 1/213:46 pmSTL - SEA
1 stop21h 33mFrontier
Deal found 12/10$342

Find flight deals from Seattle to Missouri

Keep the following information in mind while searching for Seattle to Missouri flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$237
(Alaska Airlines)

One-way from

$63
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$606

Good round-trip deal

$297 or less

Good one-way deal

$119 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Lambert-St Louis flights.
Search Deals
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. 10% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 December 12, 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

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Tue 1/20

3:35 pm-11:27 pm

1 stop5h 52m

Kansas City

Fri 1/23

7:00 am-9:06 am

Nonstop4h 06m

$249

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Fri 2/13

6:15 pm-11:44 pm

Nonstop3h 29m

Kansas City

Sun 2/15

7:00 am-9:06 am

Nonstop4h 06m

$258

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Mon 3/23

11:12 pm-9:51 am

1 stop8h 39m

Kansas City

Tue 4/7

7:55 am-10:00 am

Nonstop4h 05m

$268

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Mon 3/16

6:00 am-3:07 pm

1 stop7h 07m

Kansas City

Sat 3/21

6:40 am-12:25 pm

1 stop7h 45m

$278

SeattleSpringfield

SEA - SGF

SEASGF

Seattle/Tacoma Intl

Thu 1/8

9:00 am-9:58 pm

2 stops10h 58m

Springfield-Branson

Thu 1/15

5:03 pm-9:15 pm

1 stop6h 12m

$280

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Fri 1/30

5:58 pm-11:24 pm

Nonstop3h 26m

Kansas City

Sun 2/1

3:59 pm-2:43 pm

1 stop24h 44m

$282

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Sun 1/18

11:35 am-3:05 pm

1 stop25h 30m

Kansas City

Sun 1/25

2:38 pm-4:44 pm

Nonstop4h 06m

$282

SeattleSpringfield

SEA - SGF

SEASGF

Seattle/Tacoma Intl

Wed 1/7

8:35 am-6:04 pm

1 stop7h 29m

Springfield-Branson

Wed 1/14

12:45 pm-8:45 pm

1 stop10h 00m

$289

SeattleSpringfield

SEA - SGF

SEASGF

Seattle/Tacoma Intl

Fri 1/9

7:00 am-5:09 pm

1 stop8h 09m

Springfield-Branson

Mon 1/12

5:00 pm-10:20 pm

1 stop7h 20m

$289

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 1/8

7:55 am-1:54 pm

Nonstop3h 59m

Lambert-St Louis

Mon 1/12

2:50 pm-5:25 pm

Nonstop4h 35m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 58 results
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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, January is the cheapest month in which you can book a flight from Seattle to Missouri (average of $61). Flying from Seattle to Missouri in March is currently the most expensive (average of $232). 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 December 12, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 22% on flights from Seattle to Missouri by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Seattle to Missouri?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Missouri. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Missouri flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 12, 2025.

The most flights from SEA to USMO are scheduled on a Thursday (11 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 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 December 12, 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
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,817 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 4 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?

    Delta, United Airlines, and Alaska Airlines can get you from Seattle to Missouri in just under 3h 26m. Your travel time can differ by up to 7h 32m. The distance between Seattle and Missouri is about 1485 mi. This flight may include one or multiple stops.

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

    When deciding which route to take from Seattle to Missouri consider Seattle/Tacoma Intl - Kansas City, Seattle/Tacoma Intl - Lambert-St Louis 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 Hawaiian Airlines (90%), Air Tahiti Nui (90%) or Qatar Airways (81%) 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 $118. While the most popular route (Seattle/Tacoma Intl - Kansas City) can be booked for $199 on average, our data indicates $466 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, January is the cheapest month in which you can book a flight from Seattle to Missouri (average of $61). Flying from Seattle to Missouri in March is currently the most expensive (average of $232). 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.

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Alternative routes for Seattle to Missouri

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$123Average$304FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$136Average$284FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$168Average$295FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$178Average$398FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$182Average$378FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$186Average$508FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$453FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$228Average$424FlexibilityNo cancel feeOn-time75%

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