Missouri

$109+ Cheap flights from Washington to Missouri

SEA — STL
Dec 4 — Dec 111
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Cheap flight deals from Washington to Missouri

Cheapest flights from Washington to Missouri

Sat 12/511:45 am -
1 stop6h 15m
Wed 12/96:20 am -
1 stop8h 30m
Deal found 11/2$222
Sat 12/510:49 am -
1 stop6h 17m
Sat 12/121:43 pm -
1 stop8h 48m
Deal found 11/2$227
Wed 12/29:01 am -
1 stop7h 10m
Wed 12/96:30 am -
2 stops9h 19m
Deal found 11/2$232
Sat 12/56:00 am -
1 stop7h 52m
Sat 12/127:08 am -
1 stop7h 28m
Deal found 11/3$237
Tue 12/811:05 am -
2 stops10h 05m
Fri 12/117:20 pm -
1 stop7h 25m
Deal found 10/30$242
Fri 12/410:52 am -
1 stop7h 06m
Sun 12/66:02 am -
1 stop10h 34m
Deal found 11/2$247
Tue 11/249:53 pm -
1 stop12h 41m
Wed 11/258:29 pm -
1 stop20h 53m
Deal found 11/1$250
Fri 12/41:00 pm -
1 stop7h 10m
Sun 12/65:05 am -
2 stops10h 50m
Deal found 11/2$252
Fri 12/44:58 pm -
1 stop24h 37m
Tue 12/88:32 pm -
1 stop21h 11m
Deal found 11/1$257
Fri 12/42:05 pm -
1 stop6h 54m
Sun 12/65:25 am -
1 stop8h 19m
Deal found 11/3$257
Thu 12/177:55 am -
2 stops9h 15m
Thu 12/242:25 pm -
1 stop11h 10m
Deal found 11/2$258
Thu 12/105:05 am -
1 stop5h 48m
Mon 12/148:40 am -
2 stops9h 42m
Deal found 11/2$269

Find flight deals from Washington to Missouri

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$222
(Southwest)

One-way from

$109
(Southwest)

Popular in

December

Cheapest in

January

Average price

$371

Good round-trip deal

$489 or less

Good one-way deal

$223 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Lambert-St Louis flights.
From Washington to Missouri
One-way flight from Washington to Missouri
High demand for flights, 7% potential price rise
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Average for round-trip flights in November 2026
Price to beat on a round-trip flight from Washington to Missouri.
Price to beat on a one-way flight from Washington to Missouri.

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Wed 1/13

6:00 am-2:38 pm

1 stop6h 38m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$114

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Fri 12/4

11:15 pm-9:19 am

1 stop8h 04m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$124

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Thu 12/17

7:55 am-7:10 pm

2 stops9h 15m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$129

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Thu 12/3

1:00 pm-10:10 pm

1 stop7h 10m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$129

SeattleKansas City

SEA Seattle/Tacoma Intl - MCI Kansas City

SEAMCI

Seattle/Tacoma Intl

Tue 12/22

6:25 pm-12:15 pm

1 stop15h 50m

Kansas City

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$168

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Wed 12/16

6:15 am-7:26 pm

2 stops11h 11m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$179

SeattleSt. Louis

SEA Seattle/Tacoma Intl - STL Lambert-St Louis

SEASTL

Seattle/Tacoma Intl

Tue 1/26

5:00 am-4:18 pm

2 stops9h 18m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$179

SeattleKansas City

SEA Seattle/Tacoma Intl - MCI Kansas City

SEAMCI

Seattle/Tacoma Intl

Wed 12/23

1:37 pm-7:56 pm

1 stop28h 19m

Kansas City

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$182

SpokaneSt. Louis

GEG Spokane - STL Lambert-St Louis

GEGSTL

Spokane

Fri 12/4

1:03 pm-11:34 pm

1 stop8h 31m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$185

SpokaneSt. Louis

GEG Spokane - STL Lambert-St Louis

GEGSTL

Spokane

Wed 12/9

1:44 pm-9:28 pm

1 stop5h 44m

Lambert-St Louis

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Washington with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Washington to Missouri

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Missouri (average of $319). Flying from State of Washington to Missouri in July is currently the most expensive (average of $525). 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 WA to MO?

When flying from State of Washington to Missouri, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from State of Washington to Missouri?

Airfare is below average for this route at the moment.
State of Washington to Missouri flights typically cost between $226 and $611 in December.
The cheapest round-trip price found within the last 5 days was $222 on Southwest (Dec 5-Dec 9).

How far ahead should I book a flight from State of Washington to Missouri?

The best time to book flights from State of Washington to Missouri is 90 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Missouri

Read through reviews of airlines operating flights from Washington to Missouri, such as Southwest,Alaska Airlines, andDelta. 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.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Related info for your journey

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

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

    Departing from State of Washington to Missouri will take you 6h 05m. Airlines will cover a distance of 1273 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Missouri one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $74. Southwest flights start at $79 while deals on American Airlines start at $88 one-way.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Missouri (average of $319). Flying from State of Washington to Missouri in July is currently the most expensive (average of $525). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Washington to Missouri

Top 6 airlines flying from Washington to Missouri

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$113Average$441FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$133Average$330FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$485FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$184Average$487FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$196Average$503FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$246Average$485FlexibilityNo cancel feeOn-time69%

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