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$66+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Delta deal was found by Cheapflights users on 3/8. 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 4/75:50 pm
SEA
-
MCI
Nonstop3h 26m
Delta
Tue 5/57:42 am
MCI
-
SEA
Nonstop4h 09m
Delta
Deal found 3/8$159
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Fri 5/17:12 pm
SEA
-
MCI
1 stop16h 54m
Frontier
Sat 5/162:51 pm
MCI
-
SEA
1 stop20h 36m
Frontier
Deal found 3/5$166
This Delta deal was found by Cheapflights users on 3/8. 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 4/45:50 pm
SEA
-
MCI
Nonstop3h 26m
Delta
Wed 4/87:55 am
MCI
-
SEA
Nonstop4h 05m
Delta
Deal found 3/8$169
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/74:20 pm
SEA
-
MCI
1 stop19h 10m
Frontier
Mon 5/112:15 pm
MCI
-
SEA
1 stop21h 12m
Frontier
Deal found 3/6$171
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/66:57 pm
SEA
-
MCI
1 stop16h 33m
Frontier
Mon 5/112:15 pm
MCI
-
SEA
1 stop21h 12m
Frontier
Deal found 3/8$172
This Delta deal was found by Cheapflights users on 3/8. 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 5/87:15 am
SEA
-
MCI
1 stop8h 18m
Delta
Wed 5/137:40 pm
MCI
-
SEA
1 stop6h 32m
Delta
Deal found 3/8$179
This Southwest deal was found by Cheapflights users on 3/8. 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 5/811:55 pm
SEA
-
MCI
1 stop7h 30m
Southwest
Wed 5/134:25 pm
MCI
-
SEA
2 stops9h 10m
Southwest
Deal found 3/8$184
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Fri 4/177:12 pm
SEA
-
MCI
1 stop16h 54m
Frontier
Sat 4/252:51 pm
MCI
-
SEA
1 stop20h 36m
Frontier
Deal found 3/9$190
This Southwest deal was found by Cheapflights users on 3/8. 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 5/86:30 am
SEA
-
MCI
2 stops13h 35m
Southwest
Tue 5/123:40 pm
MCI
-
SEA
2 stops9h 15m
Southwest
Deal found 3/8$195
This Delta deal was found by Cheapflights users on 3/5. 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.
Thu 4/25:50 pm
SEA
-
MCI
Nonstop3h 26m
Delta
Thu 4/96:40 am
MCI
-
SEA
1 stop7h 47m
Delta
Deal found 3/5$198
This American Airlines deal was found by Cheapflights users on 3/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2711:55 pm
SEA
-
MCI
1 stop6h 59m
American Airlines
Fri 5/16:06 pm
MCI
-
SEA
1 stop8h 30m
American Airlines
Deal found 3/6$199
This Frontier deal was found by Cheapflights users on 3/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:12 pm
SEA
-
STL
1 stop22h 09m
Frontier
Sat 5/28:17 pm
STL
-
SEA
1 stop15h 10m
Frontier
Deal found 3/7$211

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$159
(Delta)

One-way from

$66
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$405

Good round-trip deal

$242 or less

Good one-way deal

$138 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. 5% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 10, 2026.
Use the filters below to find and compare flights from Seattle to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Tue 4/7

5:50 pm-11:16 pm

Nonstop3h 26m

Kansas City

Tue 5/5

7:42 am-9:51 am

Nonstop4h 09m

$159

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Sat 4/11

5:50 pm-11:16 pm

Nonstop3h 26m

Kansas City

Mon 4/20

7:59 pm-11:59 pm

1 stop6h 00m

$169

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Tue 4/7

11:45 pm-9:15 am

1 stop7h 30m

Kansas City

Tue 4/14

6:45 pm-12:10 am

1 stop7h 25m

$179

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Thu 4/30

1:45 pm-11:57 pm

1 stop8h 12m

Kansas City

Mon 5/4

12:25 pm-6:54 pm

1 stop8h 29m

$179

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Fri 5/8

11:55 pm-9:25 am

1 stop7h 30m

Kansas City

Wed 5/13

4:25 pm-11:35 pm

2 stops9h 10m

$184
Quickest round-trip

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Sat 4/4

5:50 pm-11:16 pm

Nonstop3h 26m

Kansas City

Thu 4/9

7:55 am-10:00 am

Nonstop4h 05m

$228

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 4/24

2:39 pm-11:11 pm

1 stop6h 32m

Lambert-St Louis

Tue 4/28

9:10 am-4:37 pm

1 stop9h 27m

$229

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 4/18

11:55 pm-9:30 am

1 stop7h 35m

Lambert-St Louis

Sun 4/26

4:40 pm-12:10 am

1 stop9h 30m

$229

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 5/28

11:55 pm-10:15 am

1 stop8h 20m

Lambert-St Louis

Sun 5/31

4:40 pm-12:10 am

1 stop9h 30m

$229

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 4/20

11:14 pm-9:42 am

1 stop8h 28m

Lambert-St Louis

Fri 4/24

6:45 pm-11:59 pm

1 stop7h 14m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, March is the cheapest month in which you can book a flight from Seattle to Missouri (average of $134). Flying from Seattle to Missouri in February is currently the most expensive (average of $207). 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 March 10, 2026.

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.

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 March 10, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta 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
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
12,016 reviews
Alaska Airlines
8.0
Very good
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Southwest
8.0
Very good
4,317 reviews
Alaska Airlines
8.0
Very good
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,276 reviews
Alaska Airlines
8.0
Very good
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Hawaiian Airlines
7.8
Good
2,837 reviews
Alaska Airlines
8.0
Very good
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,414 reviews
Alaska Airlines
8.0
Very good
12,016 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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, Southwest, and United Airlines can get you from Seattle to Missouri in just under 3h 26m. Your travel time can differ by up to 4h 04m. The distance between Seattle and Missouri is about 1485 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 United Airlines, with whom users have recently found tickets for as low as $74. However, be on the lookout for offers from American Airlines and Southwest, 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 - 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 Qatar Airways (97%), Japan Airlines (96%) or Hawaiian Airlines (95%) 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 - Kansas City) can be booked for $159 on average, our data indicates $318 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, March is the cheapest month in which you can book a flight from Seattle to Missouri (average of $134). Flying from Seattle to Missouri in February is currently the most expensive (average of $207). 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$94Average$287FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$133Average$249FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$148Average$375FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$157Average$448FlexibilityNo cancel feeOn-time69%
Spirit AirlinesCheapest$168Average$285FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$182Average$374FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$188Average$521FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$205Average$410FlexibilityNo cancel feeOn-time75%

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