What is the cheapest airline that flies from Missouri to Seattle/Tacoma Intl?

Frontier, United Airlines, and Southwest are the most popular carriers operating from Missouri to Seattle/Tacoma Intl

What airlines fly to Seattle?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Seattle from Missouri according to our data. Alaska Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How many flights depart from Missouri to Seattle on average per day?

As of August 2025, there are 18 flights per day flying from Missouri to Seattle. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

How long does it take to fly to Seattle?

Flight times vary depending on what airport in Missouri you fly out of and what airport in Seattle you fly into. For example, flying from Kansas City to Seattle takes 3h 52m on average. On the other hand, flying from St. Louis to Seattle takes 4h 19m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

How many flights depart from Missouri to Seattle on average per week?

128 flights are operational weekly from Missouri to Seattle as of August 2025. The most popular departure day for this route is Mon, with 27% of flights per week taking off on this day.

When did momondo last update prices for flights from Missouri to Seattle/Tacoma Intl Airport?

Prices for flights from Missouri to Seattle/Tacoma Intl Airport refresh daily.

How many operators does momondo search for flights from Missouri to Seattle/Tacoma Intl Airport?

There are 8 operators available for flights from Missouri to Seattle/Tacoma Intl Airport as of August 2025.

How old do you have to be to fly from Missouri to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$74 Cheap Flights from Missouri to Seattle in 2025

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Find the cheapest flights from Missouri to Seattle

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

3:01 pm - 12:30 amMCI-SEA

11h 29m1 stop

9:39 pm - 3:10 pmSEA-MCI

15h 31m1 stop

$224

Find Deal

Thu, Sep 4 - Sat, Sep 13

3:01 pm - 12:30 amMCI-SEA

11h 29m1 stop

3:40 pm - 9:12 pmSEA-MCI

3h 32mnonstop

$226

Find Deal

Fri, Sep 5 - Wed, Sep 10

6:00 am - 10:45 amSTL-SEA

6h 45m1 stop

11:40 pm - 8:37 amSEA-STL

6h 57m1 stop

$229Delta

Find Deal

Sun, Aug 31 - Fri, Sep 12

2:38 pm - 3:41 pmSTL-SEA

27h 03m1 stop

6:12 am - 9:06 amSEA-STL

24h 54m1 stop

$231Frontier

Find Deal

Sun, Sep 14 - Sun, Sep 21

4:50 pm - 11:10 pmSTL-SEA

8h 20m1 stop

8:25 am - 5:45 pmSEA-STL

7h 20m2 stops

$232Southwest

Find Deal

Wed, Sep 24 - Wed, Oct 1

3:01 pm - 12:30 amMCI-SEA

11h 29m1 stop

8:35 pm - 1:48 pmSEA-MCI

15h 13m2 stops

$233Frontier

Find Deal

Fri, Sep 26 - Sun, Sep 28

5:17 am - 1:10 pmSTL-SEA

9h 53m1 stop

12:59 am - 10:37 amSEA-STL

7h 38m1 stop

$243American Airlines

Find Deal

Sat, Nov 8 - Sun, Nov 9

7:15 pm - 12:50 amSTL-SEA

7h 35m1 stop

6:45 am - 5:40 pmSEA-STL

8h 55m2 stops

$248Southwest

Find Deal

Sun, Sep 21 - Tue, Sep 23

3:30 pm - 8:16 pmSTL-SEA

6h 46m1 stop

7:25 am - 11:09 pmSEA-STL

13h 44m2 stops

$251Delta

Find Deal

Tue, Sep 23 - Tue, Sep 30

6:20 am - 2:49 pmSTL-SEA

10h 29m1 stop

6:11 am - 6:00 pmSEA-STL

9h 49m1 stop

$252American Airlines

Find Deal

Sat, Sep 6 - Sat, Sep 13

Frontier flights from Missouri to Seattle

Our best Frontier deals on Missouri to Seattle flight tickets

Frontier

Sep 14

STL2:38 pmLambert-St Louis

27h 03m

1 stop

SEA3:41 pmSeattle/Tacoma Intl

Sep 21

SEA6:12 amSeattle/Tacoma Intl

24h 54m

1 stop

STL9:06 amLambert-St Louis

$231

Find similar

Frontier

Sep 26

MCI3:01 pmKansas City

11h 29m

1 stop

SEA12:30 amSeattle/Tacoma Intl

Sep 28

SEA8:35 pmSeattle/Tacoma Intl

15h 13m

2 stops

MCI1:48 pmKansas City

$233

Find similar

Frontier

Sep 16

STL7:55 pmLambert-St Louis

29h 04m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Sep 24

SEA7:00 amSeattle/Tacoma Intl

24h 06m

1 stop

STL9:06 amLambert-St Louis

$235

Find similar

Delta flights from Missouri to Seattle

Our best Delta deals on Missouri to Seattle flight tickets

Delta

Aug 31

STL6:00 amLambert-St Louis

6h 45m

1 stop

SEA10:45 amSeattle/Tacoma Intl

Sep 12

SEA11:40 pmSeattle/Tacoma Intl

6h 57m

1 stop

STL8:37 amLambert-St Louis

$229

Find similar

Delta

Sep 23

STL3:30 pmLambert-St Louis

6h 46m

1 stop

SEA8:16 pmSeattle/Tacoma Intl

Sep 30

SEA7:25 amSeattle/Tacoma Intl

13h 44m

2 stops

STL11:09 pmLambert-St Louis

$251

Find similar

Delta

Sep 21

STL5:50 pmLambert-St Louis

7h 53m

1 stop

SEA11:43 pmSeattle/Tacoma Intl

Sep 29

SEA11:40 pmSeattle/Tacoma Intl

6h 57m

1 stop

STL8:37 amLambert-St Louis

$254

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 9/4

3:01 pm-12:30 am

1 stop11h 29m

Seattle/Tacoma Intl

Sat 9/13

9:39 pm-3:10 pm

1 stop15h 31m

$224

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 9/5

3:01 pm-12:30 am

1 stop11h 29m

Seattle/Tacoma Intl

Wed 9/10

3:40 pm-9:12 pm

Nonstop3h 32m

$226

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sun 8/31

6:00 am-10:45 am

1 stop6h 45m

Seattle/Tacoma Intl

Fri 9/12

11:40 pm-8:37 am

1 stop6h 57m

$229

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sun 9/14

2:38 pm-3:41 pm

1 stop27h 03m

Seattle/Tacoma Intl

Sun 9/21

6:12 am-9:06 am

1 stop24h 54m

$231

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 9/24

4:50 pm-11:10 pm

1 stop8h 20m

Seattle/Tacoma Intl

Wed 10/1

8:25 am-5:45 pm

2 stops7h 20m

$232

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 9/26

3:01 pm-12:30 am

1 stop11h 29m

Seattle/Tacoma Intl

Sun 9/28

8:35 pm-1:48 pm

2 stops15h 13m

$233

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 11/8

5:17 am-1:10 pm

1 stop9h 53m

Seattle/Tacoma Intl

Sun 11/9

12:59 am-10:37 am

1 stop7h 38m

$243

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sun 9/21

7:15 pm-12:50 am

1 stop7h 35m

Seattle/Tacoma Intl

Tue 9/23

6:45 am-5:40 pm

2 stops8h 55m

$248

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/23

3:30 pm-8:16 pm

1 stop6h 46m

Seattle/Tacoma Intl

Tue 9/30

7:25 am-11:09 pm

2 stops13h 44m

$251

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 9/6

6:20 am-2:49 pm

1 stop10h 29m

Seattle/Tacoma Intl

Sat 9/13

6:11 am-6:00 pm

1 stop9h 49m

$252

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Missouri to Seattle

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 Seattle?

In general, September is the cheapest month to fly from Missouri to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $276. If you don’t want to visit Seattle in September, then you should wait until October to fly from Missouri, when ticket prices are also cheap, with an average price of $289.

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

On average, the least expensive day to fly to Seattle from Missouri is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $470. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Missouri because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $554.

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

Flying to Seattle from Missouri in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $448 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $513. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Missouri to Seattle/Tacoma Intl flight route?

Fly from Kansas City to Seattle/Tacoma Intl for the best Missouri - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $356 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Missouri for as low as $284 on momondo.

What cabin class options are available on Missouri to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Missouri to Seattle/Tacoma Intl 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 Missouri to Seattle flights?

No. A direct flight is the cheapest option for a flight between Missouri to Seattle.

Cheap Missouri to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Seattle

Best Price Found	$74
Fastest flight time	3h 52m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Missouri in the past 72 hours is $74. The best round-trip flight deal from Missouri to Seattle found on momondo in the last 72 hours is $224.

The fastest flight from Missouri to Seattle takes 3h 52m

Direct flights go from Missouri to Seattle every day.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

When did momondo last update prices for flights from Missouri to Seattle/Tacoma Intl Airport?
Prices for flights from Missouri to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Missouri to Seattle/Tacoma Intl Airport?
There are 8 operators available for flights from Missouri to Seattle/Tacoma Intl Airport as of August 2025.
How old do you have to be to fly from Missouri to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Missouri to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Missouri to Seattle is Boeing 737 (28.39% of total bookings). The next most popular plane models are Boeing 737 MAX 9 (24.40%), Boeing 737-900 Passenger/BBJ3 (winglets) (20.70%), and Boeing 737-800 Passenger/BBJ2 (winglets) (18.06%).

Best airlines flying from Missouri to Seattle

Compare and see reviews for airlines that fly from Missouri to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $94	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Frontier	PriceFrom $100	Free Cancellation	Rating 5.8 3,212 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $111	Free Cancellation	Rating 6.3 8,038 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $149	Free Cancellation	Rating 7.8 2,664 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $179	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
American Airlines	PriceFrom $188	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $216	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Kent

Lynnwood

Federal Way

Puyallup

Marysville

Tukwila

Kirkland

Lakewood

Centralia

Shoreline

Cle Elum

Fife

Westport

Redmond

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Missouri to Seattle. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Missouri to Seattle flights to just show those with flexible booking policies.

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

Once you have performed a search for Missouri to Seattle 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 Missouri to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Missouri and alert you when they change.

An easier way to manage your Seattle 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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Cheap flights from Missouri to Seattle from $74

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Seattle departing on 9/19. 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

Filter for what you want

Filter for what you want

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Trusted and free

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Price Alerts

Find the cheapest flights from Missouri to Seattle

Cheap round-trip flights

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Cheap last minute flights

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Frontier flights from Missouri to Seattle

Our best Frontier deals on Missouri to Seattle flight tickets

Delta flights from Missouri to Seattle

Our best Delta deals on Missouri to Seattle flight tickets

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How to get the cheapest flight ticket from Missouri to Seattle

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 Seattle?

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

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

What is the cheapest Missouri to Seattle/Tacoma Intl flight route?

Fly from Kansas City to Seattle/Tacoma Intl for the best Missouri - Seattle/Tacoma Intl flight prices

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

What cabin class options are available on Missouri to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Missouri to Seattle/Tacoma Intl 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 Missouri to Seattle flights?

No. A direct flight is the cheapest option for a flight between Missouri to Seattle.

What is the cheapest airline that flies from Missouri to Seattle/Tacoma Intl?

Frontier, United Airlines, and Southwest are the most popular carriers operating from Missouri to Seattle/Tacoma Intl

What airlines fly to Seattle?

How many flights depart from Missouri to Seattle on average per day?

As of August 2025, there are 18 flights per day flying from Missouri to Seattle. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

How many flights depart from Missouri to Seattle on average per week?

128 flights are operational weekly from Missouri to Seattle as of August 2025. The most popular departure day for this route is Mon, with 27% of flights per week taking off on this day.

How long does it take to fly to Seattle?

Cheap Missouri to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Seattle

Best Price Found

Fastest flight time

Direct flights

Airports in Seattle

When did momondo last update prices for flights from Missouri to Seattle/Tacoma Intl Airport?

How many operators does momondo search for flights from Missouri to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from Missouri to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Missouri to Seattle?

Best airlines flying from Missouri to Seattle

Compare and see reviews for airlines that fly from Missouri to Seattle with momondo

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle 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 the United States

Airports servicing Washington