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$65+ Cheap flights from Missouri to Seattle (SEA)

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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Missouri to Seattle

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

Round-trip from

$194
(Southwest)

One-way from

$65
(Alaska Airlines)

Popular in

June

Cheapest in

January

Average price

$418

Good round-trip deal

$325 or less

Good one-way deal

$184 or less
From Missouri to Seattle/Tacoma Intl
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One-way flight from Missouri to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 20% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Missouri to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Missouri to Seattle/Tacoma Intl.
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Find flight deals from Missouri to Seattle

Cheapest flights from Missouri to Seattle
Explore the most affordable flight options available from Missouri to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/74:20 pmSTL - SEA
1 stop9h 45mSouthwest
Tue 8/1210:45 pmSEA - STL
1 stop10h 05mSouthwest
Deal found 6/9$194
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 9/186:59 pmSTL - SEA
1 stop7h 10mDelta
Sat 9/275:45 pmSEA - STL
1 stop5h 37mDelta
Deal found 6/11$209
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Thu 8/214:32 pmSTL - SEA
1 stop8h 23mAmerican Airlines
Mon 8/2512:45 amSEA - STL
1 stop10h 09mAmerican Airlines
Deal found 6/12$212
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:40 pmSTL - SEA
1 stop8h 19mUnited Airlines
Sat 9/207:00 amSEA - STL
1 stop6h 44mUnited Airlines
Deal found 6/10$218
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:51 pmMCI - SEA
1 stop6h 40mFrontier
Mon 10/276:00 amSEA - MCI
1 stop11h 02mFrontier
Deal found 6/10$228
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/139:05 amMCI - SEA
1 stop8h 48mUnited Airlines
Sat 9/207:00 amSEA - MCI
1 stop6h 56mUnited Airlines
Deal found 6/11$237
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:52 pmSTL - SEA
1 stop6h 39mFrontier
Mon 9/158:34 pmSEA - STL
1 stop10h 33mFrontier
Deal found 6/10$239
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/305:50 amMCI - SEA
1 stop6h 35mAmerican Airlines
Wed 9/106:05 amSEA - MCI
1 stop12h 42mAmerican Airlines
Deal found 6/11$242
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/183:24 pmSTL - SEA
Nonstop4h 26mHawaiian Airlines
Mon 9/811:34 amSEA - STL
Nonstop4h 00mHawaiian Airlines
Deal found 6/11$249
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:50 pmMCI - SEA
1 stop22h 35mSpirit Airlines
Mon 7/145:30 pmSEA - MCI
1 stop18h 07mSpirit Airlines
Deal found 6/10$252
This Hawaiian Airlines deal was found by Cheapflights users on 6/9. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:56 pmMCI - SEA
Nonstop4h 00mHawaiian Airlines
Wed 8/273:40 pmSEA - MCI
Nonstop3h 32mHawaiian Airlines
Deal found 6/9$257
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:05 pmMCI - SEA
2 stops9h 45mSouthwest
Sat 9/1311:00 amSEA - MCI
Nonstop3h 30mSouthwest
Deal found 6/11$272

Cheapflights Fare Finder

Customize your flight search to find flights from Missouri to Seattle 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 June 12, 2025.
Use the filters below to find and compare flights from Missouri to Seattle that are best for you.

Fly from

Missouri

Fly to

Seattle

Route

Depart

Return

Price

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 8/7

4:20 pm-12:05 am

1 stop9h 45m

Seattle/Tacoma Intl

Tue 8/12

10:45 pm-10:50 am

1 stop10h 05m

$194

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 8/21

4:32 pm-10:55 pm

1 stop8h 23m

Seattle/Tacoma Intl

Mon 8/25

12:45 am-12:54 pm

1 stop10h 09m

$212

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 8/16

7:35 am-12:33 pm

1 stop6h 58m

Seattle/Tacoma Intl

Tue 8/19

5:30 am-1:29 pm

1 stop5h 59m

$213

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Sat 9/6

6:00 am-1:30 pm

2 stops9h 30m

Seattle/Tacoma Intl

Wed 9/10

5:07 am-12:40 pm

1 stop5h 33m

$242

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 7/9

5:00 am-9:50 am

1 stop6h 50m

Seattle/Tacoma Intl

Wed 7/16

7:00 am-4:45 pm

1 stop7h 45m

$247

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 8/15

8:01 pm-6:46 pm

1 stop24h 45m

Seattle/Tacoma Intl

Mon 8/18

6:25 am-7:04 pm

1 stop10h 39m

$249

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Mon 8/18

3:24 pm-5:50 pm

Nonstop4h 26m

Seattle/Tacoma Intl

Mon 9/8

11:34 am-5:34 pm

Nonstop4h 00m

$249

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Tue 7/8

7:50 pm-4:25 pm

1 stop22h 35m

Seattle/Tacoma Intl

Mon 7/14

5:30 pm-1:37 pm

1 stop18h 07m

$252

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Tue 8/19

7:56 pm-9:56 pm

Nonstop4h 00m

Seattle/Tacoma Intl

Wed 8/27

3:40 pm-9:12 pm

Nonstop3h 32m

$257

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Mon 8/11

7:29 pm-12:34 am

1 stop7h 05m

Seattle/Tacoma Intl

Sun 8/17

7:48 pm-9:11 am

1 stop11h 23m

$260

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 51 results
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Best time to book a flight from Missouri to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Missouri 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 Missouri to Seattle

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

Currently, January is the cheapest month in which you can book a flight from Missouri to Seattle (average of $238). Flying from Missouri to Seattle in July is currently the most expensive (average of $391). 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 MO to SEA?

Find hourly flight availability from Missouri to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

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

Weekly flight availability from Missouri to Seattle

Explore weekly flight availability from Missouri to Seattle. 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 June 12, 2025.

The most flights from USMO to SEA are scheduled on a Thursday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Missouri to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Missouri to Seattle. 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 into for flights to Seattle from Missouri?

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

  • How popular is this Missouri to Seattle flight route?

    The Missouri to Seattle/Tacoma Intl flight path was viewed by 40 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $65. American Airlines flights start at $109 while deals on Frontier start at $114 one-way.

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

    While some choose either Kansas City - Seattle/Tacoma Intl or Springfield-Branson - Seattle/Tacoma Intl, Lambert-St Louis - Seattle/Tacoma Intl is the most popular route from Missouri to Seattle.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Missouri to Seattle on time: Japan Airlines (87%), Qatar Airways (86%), American Airlines (80%).

  • What are the cheapest flights from Missouri to Seattle?

    While on average a flight from Missouri to Seattle is generally $1,118, our data shows the cheapest flight currently is $124. When looking at the most popular route, (Lambert-St Louis - Seattle/Tacoma Intl), you can expect to pay $179 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Missouri to Seattle 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 Missouri to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Missouri to Seattle (average of $238). Flying from Missouri to Seattle in July is currently the most expensive (average of $391). 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

Traveling to a place near Missouri?

Book flights to Missouri if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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Alternative routes for Missouri to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Missouri to Seattle

Discover the top 8 airlines that operate flights from Missouri to Seattle. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$94Average$284FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$110Average$186FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$136Average$233FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$149Average$401FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$188Average$401FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$196Average$506FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$456FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$216Average$390FlexibilityNo cancel feeOn-time75%

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