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$84+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
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 julio 31, 2025.

Round-trip from

$236
(Southwest)

One-way from

$84
(United Airlines)

Popular in

July

Cheapest in

January

Average price

$432

Good round-trip deal

$317 or less

Good one-way deal

$147 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. 16% potential increase in price ($64 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 July 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 julio 31, 2025.

This Southwest deal was found by Cheapflights users on 7/30. 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.
sáb. 8/231:45 pmSTL - SEA
1 stop9h 15mSouthwest
sáb. 8/3011:10 pmSEA - STL
1 stop8h 00mSouthwest
Deal found 7/30$236
This Delta deal was found by Cheapflights users on 7/31. 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.
vie. 8/227:55 amMCI - SEA
Nonstop3h 57mDelta
lun. 8/255:35 pmSEA - MCI
Nonstop3h 27mDelta
Deal found 7/31$237
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
dom. 9/76:30 pmSTL - SEA
Nonstop4h 29mAlaska Airlines
vie. 9/128:36 amSEA - STL
Nonstop4h 03mAlaska Airlines
Deal found 7/29$237
This Frontier deal was found by Cheapflights users on 7/30. 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.
vie. 8/226:02 pmMCI - SEA
1 stop8h 32mFrontier
jue. 8/286:17 amSEA - MCI
1 stop5h 16mFrontier
Deal found 7/30$238
This Delta deal was found by Cheapflights users on 7/30. 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.
mié. 8/272:25 pmSTL - SEA
1 stop6h 35mDelta
mar. 9/211:55 pmSEA - STL
1 stop6h 41mDelta
Deal found 7/30$238
This CheapOair deal was found by Cheapflights users on 7/30. 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.
mié. 8/207:54 pmSTL - SEA
1 stop15h 40mFrontier
sáb. 8/236:25 amSEA - STL
1 stop24h 46mFrontier
Deal found 7/30$239
This Hawaiian Airlines deal was found by Cheapflights users on 7/30. 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.
lun. 11/32:57 pmMCI - SEA
Nonstop4h 03mHawaiian Airlines
lun. 11/36:16 pmSEA - MCI
Nonstop3h 30mHawaiian Airlines
Deal found 7/30$241
This Southwest deal was found by Cheapflights users on 7/31. 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.
mar. 8/263:05 pmMCI - SEA
2 stops9h 45mSouthwest
mié. 9/35:35 amSEA - MCI
1 stop8h 00mSouthwest
Deal found 7/31$242
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
sáb. 8/304:55 pmMCI - SEA
1 stop5h 40mAlaska Airlines
mié. 9/107:50 amSEA - MCI
1 stop6h 11mAlaska Airlines
Deal found 7/29$246
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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.
mié. 8/276:00 amSTL - SEA
Nonstop4h 30mHawaiian Airlines
mié. 9/311:31 amSEA - STL
Nonstop4h 03mHawaiian Airlines
Deal found 7/28$249
This American Airlines deal was found by Cheapflights users on 7/30. 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.
lun. 8/187:53 amSTL - SEA
1 stop8h 50mAmerican Airlines
jue. 8/216:30 amSEA - STL
1 stop9h 00mAmerican Airlines
Deal found 7/30$253
This United Airlines deal was found by Cheapflights users on 7/30. 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.
mié. 9/31:45 pmMCI - SEA
2 stops9h 09mUnited Airlines
jue. 9/115:02 amSEA - MCI
1 stop5h 38mUnited Airlines
Deal found 7/30$265

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 julio 31, 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

sáb. 8/23

1:45 pm-9:00 pm

1 stop9h 15m

Seattle/Tacoma Intl

sáb. 8/30

11:10 pm-9:10 am

1 stop8h 00m

$236

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

vie. 8/22

7:55 am-9:52 am

Nonstop3h 57m

Seattle/Tacoma Intl

lun. 8/25

5:35 pm-11:02 pm

Nonstop3h 27m

$237

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

dom. 9/7

6:30 pm-8:59 pm

Nonstop4h 29m

Seattle/Tacoma Intl

vie. 9/12

8:36 am-2:39 pm

Nonstop4h 03m

$237

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

vie. 8/22

6:02 pm-12:34 am

1 stop8h 32m

Seattle/Tacoma Intl

jue. 8/28

6:17 am-1:33 pm

1 stop5h 16m

$238

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

mié. 8/27

2:25 pm-7:00 pm

1 stop6h 35m

Seattle/Tacoma Intl

mar. 9/2

11:55 pm-8:36 am

1 stop6h 41m

$238

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

mié. 8/20

7:54 pm-9:34 am

1 stop15h 40m

Seattle/Tacoma Intl

sáb. 8/23

6:25 am-9:11 am

1 stop24h 46m

$239

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

mar. 8/26

3:05 pm-10:50 pm

2 stops9h 45m

Seattle/Tacoma Intl

mié. 9/3

5:35 am-3:35 pm

1 stop8h 00m

$242

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

sáb. 8/30

4:55 pm-8:35 pm

1 stop5h 40m

Seattle/Tacoma Intl

mié. 9/10

7:50 am-4:01 pm

1 stop6h 11m

$246

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

mié. 8/27

6:00 am-8:30 am

Nonstop4h 30m

Seattle/Tacoma Intl

mié. 9/3

11:31 am-5:34 pm

Nonstop4h 03m

$249

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

lun. 8/18

7:53 am-2:43 pm

1 stop8h 50m

Seattle/Tacoma Intl

jue. 8/21

6:30 am-5:30 pm

1 stop9h 00m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 44 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 June is currently the most expensive (average of $389). 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 julio 31, 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 julio 31, 2025.

The most flights from USMO to SEA are scheduled on a Thursday (16 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (4 on average).

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 julio 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Missouri to Seattle 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

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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 42 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 United Airlines, which is currently one of the cheapest options available, starting at $84. Delta flights start at $89 while deals on Alaska Airlines start at $106 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: Qatar Airways (89%), Japan Airlines (87%), Finnair (86%).

  • What are the cheapest flights from Missouri to Seattle?

    While on average a flight from Missouri to Seattle is generally $1,748, 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 $177 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 June is currently the most expensive (average of $389). 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 Seattle?

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

Browse thousands of different options on Cheapflights for your next trip

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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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$94Average$284FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$100Average$189FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$119Average$248FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$149Average$390FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$179Average$390FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$193Average$499FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$462FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$216Average$489FlexibilityNo cancel feeOn-time75%

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