What is the cheapest airline that flies from Washington to Missouri?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Washington to Missouri

How many flights depart from State of Washington to Missouri on average per week?

The number of flights available between State of Washington and Missouri is 45 per week as of November 2025. The most frequent departure day is Tue, with 29% of weekly flights leaving on this day.

What airlines fly to Missouri?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Missouri from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 8 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

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

The flight from State of Washington to Missouri depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to St. Louis (the most popular airport in Missouri), then the flight time is 3h 52m on average. If you fly from Spokane (another popular airport in State of Washington) to St. Louis, then the average flight time is 5h 14m.

How many flights depart from State of Washington to Missouri on average per day?

6 flights are operational daily from State of Washington to Missouri as of November 2025. The most popular departure time for this route is 6:00PM, with 43% of flights per day taking off in the evening.

When did momondo last update prices for flights from Washington to Missouri?

Prices for flights from Washington to Missouri are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to Missouri?

The number of operators available for flights from Washington to Missouri is 8 as of November 2025.

How old do you have to be to fly from Washington to Missouri?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Missouri.

What documentation or ID do you need to fly to Missouri?

The required travel and health documents for your Missouri trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Missouri. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$56 Cheap Flights from Washington to Missouri in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:39 am - 3:05 pmPDX-MCI

3h 26mnonstop

3:59 pm - 5:57 pmMCI-PDX

3h 58mnonstop

$187Alaska Airlines

Find Deal

Thu, Jan 8 - Tue, Jan 13

11:14 am - 1:53 pmPDX-MCI

24h 39m2 stops

8:09 pm - 11:56 amMCI-PDX

17h 47m1 stop

$189Frontier

Find Deal

Thu, Dec 4 - Thu, Dec 11

6:15 am - 3:19 pmPDX-MCI

7h 04m1 stop

6:30 am - 12:32 pmMCI-PDX

8h 02m1 stop

$207Delta

Find Deal

Thu, Jan 8 - Tue, Jan 13

5:30 pm - 10:59 pmSEA-MCI

3h 29mnonstop

7:55 am - 10:05 amMCI-SEA

4h 10mnonstop

$208Delta

Find Deal

Wed, Mar 11 - Tue, Mar 17

10:15 am - 9:30 pmPDX-MCI

9h 15m2 stops

6:25 am - 11:45 amMCI-PDX

7h 20m1 stop

$212Southwest

Find Deal

Fri, Feb 27 - Tue, Mar 3

11:59 pm - 8:54 amPDX-MCI

6h 55m1 stop

5:05 am - 11:00 amMCI-PDX

7h 55m1 stop

$216American Airlines

Find Deal

Thu, Dec 11 - Thu, Dec 18

5:00 am - 12:37 pmSEA-MCI

5h 37m1 stop

5:45 am - 9:55 amMCI-SEA

6h 10m1 stop

$217United Airlines

Find Deal

Thu, Feb 5 - Sun, Feb 8

5:15 am - 5:15 pmSEA-STL

10h 00m2 stops

10:15 am - 6:40 pmSTL-SEA

10h 25m2 stops

$243Southwest

Find Deal

Thu, Dec 4 - Tue, Dec 9

6:00 am - 4:27 pmPDX-STL

8h 27m1 stop

5:30 pm - 10:52 pmSTL-PDX

7h 22m1 stop

$250United Airlines

Find Deal

Wed, Dec 3 - Wed, Dec 10

12:41 am - 10:36 amSEA-STL

7h 55m1 stop

7:38 am - 2:05 pmSTL-SEA

8h 27m1 stop

$259American Airlines

Find Deal

Tue, Dec 2 - Wed, Dec 10

United Airlines flights from State of Washington to Missouri

Our best United Airlines deals on State of Washington to Missouri flight tickets

United Airlines

Jan 9

SEA8:40 amSeattle/Tacoma Intl

5h 28m

1 stop

MCI4:08 pmKansas City

Jan 12

MCI7:00 amKansas City

10h 44m

1 stop

SEA3:44 pmSeattle/Tacoma Intl

$217

Find similar

United Airlines

Jan 9

SEA8:40 amSeattle/Tacoma Intl

5h 28m

1 stop

MCI4:08 pmKansas City

Jan 12

MCI1:42 pmKansas City

10h 16m

2 stops

SEA9:58 pmSeattle/Tacoma Intl

$222

Find similar

United Airlines

Dec 3

PDX6:00 amPortland

8h 27m

1 stop

STL4:27 pmLambert-St Louis

Dec 10

STL5:30 pmLambert-St Louis

7h 22m

1 stop

PDX10:52 pmPortland

$250

Find similar

American Airlines flights from State of Washington to Missouri

Our best American Airlines deals on State of Washington to Missouri flight tickets

American Airlines

Dec 11

PDX11:59 pmPortland

6h 55m

1 stop

MCI8:54 amKansas City

Dec 18

MCI5:05 amKansas City

7h 55m

1 stop

PDX11:00 amPortland

$216

Find similar

American Airlines

Dec 10

SEA12:38 amSeattle/Tacoma Intl

8h 28m

1 stop

MCI11:06 amKansas City

Dec 13

MCI10:45 amKansas City

9h 06m

1 stop

SEA5:51 pmSeattle/Tacoma Intl

$238

Find similar

American Airlines

Dec 2

SEA12:41 amSeattle/Tacoma Intl

7h 55m

1 stop

STL10:36 amLambert-St Louis

Dec 10

STL7:38 amLambert-St Louis

8h 27m

1 stop

SEA2:05 pmSeattle/Tacoma Intl

$259

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandKansas City

PDX - MCI

PDXMCI

Portland

Thu 1/8

9:39 am-3:05 pm

Nonstop3h 26m

Kansas City

Tue 1/13

3:59 pm-5:57 pm

Nonstop3h 58m

$187

PortlandKansas City

PDX - MCI

PDXMCI

Portland

Thu 12/4

11:14 am-1:53 pm

2 stops24h 39m

Kansas City

Thu 12/11

8:09 pm-11:56 am

1 stop17h 47m

$189

PortlandKansas City

PDX - MCI

PDXMCI

Portland

Thu 1/8

6:15 am-3:19 pm

1 stop7h 04m

Kansas City

Tue 1/13

6:30 am-12:32 pm

1 stop8h 02m

$207

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Wed 3/11

5:30 pm-10:59 pm

Nonstop3h 29m

Kansas City

Tue 3/17

7:55 am-10:05 am

Nonstop4h 10m

$208

PortlandKansas City

PDX - MCI

PDXMCI

Portland

Fri 2/27

10:15 am-9:30 pm

2 stops9h 15m

Kansas City

Tue 3/3

6:25 am-11:45 am

1 stop7h 20m

$212

PortlandKansas City

PDX - MCI

PDXMCI

Portland

Thu 12/11

11:59 pm-8:54 am

1 stop6h 55m

Kansas City

Thu 12/18

5:05 am-11:00 am

1 stop7h 55m

$216

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Thu 2/5

5:00 am-12:37 pm

1 stop5h 37m

Kansas City

Sun 2/8

5:45 am-9:55 am

1 stop6h 10m

$217

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 12/4

5:15 am-5:15 pm

2 stops10h 00m

Lambert-St Louis

Tue 12/9

10:15 am-6:40 pm

2 stops10h 25m

$243

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 12/3

6:00 am-4:27 pm

1 stop8h 27m

Lambert-St Louis

Wed 12/10

5:30 pm-10:52 pm

1 stop7h 22m

$250

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 12/2

12:41 am-10:36 am

1 stop7h 55m

Lambert-St Louis

Wed 12/10

7:38 am-2:05 pm

1 stop8h 27m

$259

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from State of Washington to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Missouri?

In general, September is the cheapest month to fly from State of Washington to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $328. If you aren’t able to travel to Missouri during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $330.

What is the cheapest day to depart on your flight to Missouri?

The cheapest day to depart from State of Washington to Missouri is on a Thursday when prices can be found for as low as $388. Flights from State of Washington to Missouri on a Sunday will generally be more expensive and average around $486. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Missouri?

According to our data, the cheapest time of day to fly to Missouri is in the evening. momondo users have found flights departing from State of Washington to Missouri in the evening for as low as $267. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the morning, with an average ticket price of $437. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington to Missouri flight route?

Fly from Seattle/Tacoma Intl to Lambert-St Louis for the best Washington - Missouri flight prices

How far in advance should I book a flight to Missouri?

You are more likely to see cheaper flights to Missouri from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $390 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from State of Washington for as low as $262 on momondo.

What cabin class options are available on Washington to Missouri flights?

There are 4 cabin classes available to choose from on Washington to Missouri flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Missouri flights?

You could potentially save up to 40% on your flight if you consider stops on a State of Washington to Missouri flight.

Cheap State of Washington to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Missouri

Best Price Found	$148
Fastest flight time	3h 20m
Direct flights	Every day
Airports in Missouri	1 airport

The best one-way flight to Missouri from State of Washington in the past 72 hours is $148. The best round-trip flight deal from State of Washington to Missouri found on momondo in the last 72 hours is $277.

The fastest flight from State of Washington to Missouri takes 3h 20m

Direct flights go from State of Washington to Missouri every day.

There is 1 airport near Missouri: Kansas City (MCI)

Search flight deals

When did momondo last update prices for flights from Washington to Missouri?
Prices for flights from Washington to Missouri are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Missouri?
The number of operators available for flights from Washington to Missouri is 8 as of November 2025.
How old do you have to be to fly from Washington to Missouri?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Missouri.
What documentation or ID do you need to fly to Missouri?
The required travel and health documents for your Missouri trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Missouri. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from State of Washington to Missouri?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to Missouri is Boeing 737, representing 36.46% of all bookings. The subsequent popular models are Boeing 737 MAX 9 at 23.68%, Boeing 737-900 Passenger/BBJ3 (winglets) at 18.84%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 11.65%.

Best airlines flying from State of Washington to Missouri

Compare and see reviews for airlines that fly from State of Washington to Missouri with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $134	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Frontier	PriceFrom $137	Free Cancellation	Rating 5.8 3,103 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $168	Free Cancellation	Rating 6.3 8,146 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $178	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $182	Free Cancellation	Rating 8.0 4,245 reviews	Search Southwest flights
American Airlines	PriceFrom $186	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $203	Free Cancellation	Rating 8.0 11,316 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 9,015 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Missouri?

It is quick and easy to find Washington to Missouri flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Missouri that suits you.

Can I find flights from Washington to Missouri with flexible booking policies on momondo?

Flights from Washington to Missouri with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington to Missouri?

Once you have performed a search for Washington to Missouri flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington to Missouri right now. Can momondo alert me if prices change?

Price alerts on flights to Missouri from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Missouri trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Missouri

Popular cities in Missouri

Flights to New Yorkfrom $44

Flights to Los Angelesfrom $50

Flights to Miamifrom $38

Flights to Chicagofrom $50

Flights to Orlandofrom $38

Flights to Las Vegasfrom $45

Flights to San Franciscofrom $54

Flights to Washington, D.C.from $38

Flights to Bostonfrom $53

Flights to Atlantafrom $38

Flights to Dallasfrom $48

Flights to Seattlefrom $58

State of Washington flight routes

Flights from Seattle/Tacoma Intl to Santa Rosa Sonoma County

Flights from Seattle/Tacoma Intl to Las Vegas Harry Reid Intl

Flights from Seattle/Tacoma Intl to Spokane

Flights from Seattle/Tacoma Intl to Portland

Flights from Seattle/Tacoma Intl to Phoenix Sky Harbor Intl

Flights from Seattle/Tacoma Intl to Oakland

Cheap flights from Washington to Missouri from $56

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Missouri departing on 12/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Filter for what you want

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Find the cheapest flights from Washington to Missouri

Cheap round-trip flights

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United Airlines flights from State of Washington to Missouri

Our best United Airlines deals on State of Washington to Missouri flight tickets

American Airlines flights from State of Washington to Missouri

Our best American Airlines deals on State of Washington to Missouri flight tickets

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How to get the cheapest flight ticket from State of Washington to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Missouri?

What is the cheapest day to depart on your flight to Missouri?

What is the cheapest time of day to depart on your flight to Missouri?

What is the cheapest Washington to Missouri flight route?

Fly from Seattle/Tacoma Intl to Lambert-St Louis for the best Washington - Missouri flight prices

How far in advance should I book a flight to Missouri?

What cabin class options are available on Washington to Missouri flights?

There are 4 cabin classes available to choose from on Washington to Missouri flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Missouri flights?

You could potentially save up to 40% on your flight if you consider stops on a State of Washington to Missouri flight.

What is the cheapest airline that flies from Washington to Missouri?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Washington to Missouri

What airlines fly to Missouri?

How many flights depart from State of Washington to Missouri on average per day?

6 flights are operational daily from State of Washington to Missouri as of November 2025. The most popular departure time for this route is 6:00PM, with 43% of flights per day taking off in the evening.

How many flights depart from State of Washington to Missouri on average per week?

The number of flights available between State of Washington and Missouri is 45 per week as of November 2025. The most frequent departure day is Tue, with 29% of weekly flights leaving on this day.

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

Cheap State of Washington to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Missouri

Best Price Found

Fastest flight time

Direct flights

Airports in Missouri

When did momondo last update prices for flights from Washington to Missouri?

How many operators does momondo search for flights from Washington to Missouri?

How old do you have to be to fly from Washington to Missouri?

What documentation or ID do you need to fly to Missouri?

What is the most popular plane model from State of Washington to Missouri?

Best airlines flying from State of Washington to Missouri

Compare and see reviews for airlines that fly from State of Washington to Missouri with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Missouri?

Can I find flights from Washington to Missouri with flexible booking policies on momondo?

How can momondo help me find flights from Washington to Missouri?

I’m not ready to book a flight from Washington to Missouri right now. Can momondo alert me if prices change?

An easier way to manage your Missouri trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Missouri

Popular cities in Missouri

Popular flights according to clicks in the last 7 days on momondo