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$59+ Cheap flights from Missouri to Washington

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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Missouri to Washington

Cheapest flights from Missouri to Washington
Explore the most affordable flight options available from Missouri to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:12 pm
STL
-
PDX
1 stop16h 57m
Frontier
Sun 3/1512:04 pm
PDX
-
STL
1 stop19h 45m
Frontier
Deal found 1/28$167
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/271:59 pm
STL
-
SEA
1 stop24h 02m
Frontier
Tue 3/37:33 pm
SEA
-
STL
2 stops18h 20m
Frontier
Deal found 1/27$172
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/78:12 pm
STL
-
SEA
1 stop16h 07m
Frontier
Fri 3/1312:24 pm
SEA
-
STL
1 stop19h 25m
Frontier
Deal found 1/28$173
This deal was found by Cheapflights users on 1/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:16 pm
MCI
-
PDX
Nonstop4h 04m
Alaska Airlines
Tue 3/1010:53 am
PDX
-
MCI
Nonstop3h 29m
Alaska Airlines
Deal found 1/27$177
This Delta deal was found by Cheapflights users on 1/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:45 pm
STL
-
SEA
1 stop7h 14m
Delta
Sat 5/28:20 am
SEA
-
STL
1 stop6h 30m
Delta
Deal found 1/28$177
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:12 pm
STL
-
SEA
1 stop17h 07m
Frontier
Sun 3/1512:24 pm
SEA
-
STL
1 stop19h 25m
Frontier
Deal found 1/28$181
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 3/110:11 pm
STL
-
SEA
2 stops23h 48m
Frontier
Sun 3/812:24 pm
SEA
-
STL
1 stop19h 25m
Frontier
Deal found 1/26$184
This Delta deal was found by Cheapflights users on 1/27. 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 3/106:12 pm
STL
-
SEA
1 stop7h 49m
Delta
Thu 3/1211:59 pm
SEA
-
STL
1 stop7h 02m
Delta
Deal found 1/27$185
This WAYA deal was found by Cheapflights users on 1/28. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:16 pm
MCI
-
PDX
Nonstop4h 04m
Multiple Airlines
Mon 3/912:04 pm
PDX
-
MCI
1 stop5h 49m
Multiple Airlines
Deal found 1/28$186
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 3/105:16 pm
MCI
-
PDX
Nonstop4h 04m
Alaska Airlines
Fri 3/1310:53 am
PDX
-
MCI
Nonstop3h 29m
Alaska Airlines
Deal found 1/26$187
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/269:24 pm
MCI
-
SEA
1 stop15h 31m
Frontier
Thu 3/51:16 pm
SEA
-
MCI
1 stop28h 39m
Frontier
Deal found 1/27$188
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/231:54 pm
STL
-
SEA
2 stops23h 00m
Frontier
Fri 2/2712:00 pm
SEA
-
STL
1 stop23h 56m
Frontier
Deal found 1/26$190

Find flight deals from Missouri to Washington

Keep the following information in mind while searching for Missouri to Washington flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(Kiwi.com)

One-way from

$59
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$382

Good round-trip deal

$314 or less

Good one-way deal

$154 or less
Provider with most accurate pricing for Lambert-St Louis-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Seattle/Tacoma Intl flights.
Search Deals
From Missouri to Washington
Search Deals
One-way flight from Missouri to Washington
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Missouri to Washington.
Search Deals
Price to beat on a one-way flight from Missouri to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Washington 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 January 29, 2026.
Use the filters below to find and compare flights from Missouri to Washington that are best for you.

Fly from

Missouri

Fly to

Washington

Route

Depart

Return

Price

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 4/21

2:20 pm-6:30 pm

1 stop6h 10m

Seattle/Tacoma Intl

Sat 4/25

5:35 am-2:40 pm

1 stop7h 05m

$177

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 4/21

6:45 pm-11:59 pm

1 stop7h 14m

Seattle/Tacoma Intl

Sat 5/2

8:20 am-4:50 pm

1 stop6h 30m

$177

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 2/25

7:00 am-2:44 pm

1 stop9h 44m

Seattle/Tacoma Intl

Wed 3/4

11:15 pm-9:32 am

1 stop8h 17m

$177

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 3/10

3:05 pm-8:48 pm

1 stop7h 43m

Seattle/Tacoma Intl

Fri 3/13

1:32 pm-12:21 am

1 stop8h 49m

$177

Kansas CityPortland

MCI - PDX

MCIPDX

Kansas City

Tue 3/10

5:16 pm-7:20 pm

Nonstop4h 04m

Portland

Thu 3/12

10:53 am-4:22 pm

Nonstop3h 29m

$187

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Mon 3/9

6:12 pm-12:01 am

1 stop7h 49m

Seattle/Tacoma Intl

Thu 3/12

11:59 pm-9:01 am

1 stop7h 02m

$193

Kansas CityPortland

MCI - PDX

MCIPDX

Kansas City

Wed 3/11

7:00 am-8:58 am

1 stop27h 58m

Portland

Fri 3/13

12:04 pm-7:55 pm

1 stop5h 51m

$194

Kansas CityPortland

MCI - PDX

MCIPDX

Kansas City

Fri 2/27

5:16 pm-7:20 pm

Nonstop4h 04m

Portland

Sun 3/1

10:53 am-4:22 pm

Nonstop3h 29m

$197

Kansas CityPortland

MCI - PDX

MCIPDX

Kansas City

Fri 2/20

5:16 pm-7:20 pm

Nonstop4h 04m

Portland

Fri 2/27

10:53 am-4:22 pm

Nonstop3h 29m

$197

Kansas CityPortland

MCI - PDX

MCIPDX

Kansas City

Mon 3/9

5:16 pm-7:20 pm

Nonstop4h 04m

Portland

Fri 3/13

10:53 am-4:22 pm

Nonstop3h 29m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 60 results
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Best time to book a flight from Missouri to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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 Washington

What is the cheapest month to book a flight from Missouri to State of Washington?

Currently, December is the cheapest month in which you can book a flight from Missouri to State of Washington (average of $119). Flying from Missouri to State of Washington in July is currently the most expensive (average of $188). 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 WA?

Find hourly flight availability from Missouri to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.

It’s typically best to fly out from Missouri to State of Washington in the afternoon. Doing so could potentially save you 13% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Missouri to State of Washington?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Washington. Price data was last updated on January 24, 2026.

Travelers seeking maximum savings on their Missouri to State of Washington flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated January 29, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Missouri to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,808 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,127 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,830 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
American Airlines
7.2
Good
11,206 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

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

  • How popular is this Missouri to State of Washington flight route?

    Flights from Missouri to Washington have been viewed 45 times in the past calendar month.

  • How long is the flight from Missouri to State of Washington?

    Airlines like Delta, Alaska Airlines, and United Airlines fly from Missouri to State of Washington in about 4h 04m. The time it takes to get you to your destination can typically vary by up to 5h 27m. Missouri and State of Washington are separated by a distance of 1477 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Missouri to Washington 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 State of Washington?

    Currently, December is the cheapest month in which you can book a flight from Missouri to State of Washington (average of $119). Flying from Missouri to State of Washington in July is currently the most expensive (average of $188). 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

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Alternative routes for Missouri to Washington

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 Washington

Discover the top 8 airlines that operate flights from Missouri to Washington. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$94Average$364FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$100Average$222FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$111Average$225FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$138Average$358FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$176Average$430FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$179Average$452FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$183Average$470FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$209Average$499FlexibilityNo cancel feeOn-time75%

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