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Cheap flights from Seattle to Missouri from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Missouri departing on 10/22. 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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0 bags

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Cheap round-trip flights

Frontier Logo
6:12 am - 9:06 amSEA-STL
24h 54m1 stop
Frontier Logo
7:55 pm - 12:07 pmSTL-SEA
18h 12m1 stop
$191Frontier
Find Deal
Fri, Oct 3 - Mon, Oct 6
Frontier Logo
8:43 pm - 7:53 pmSEA-MCI
21h 10m1 stop
Frontier Logo
8:38 pm - 12:13 pmMCI-SEA
17h 35m1 stop
$197Frontier
Find Deal
Wed, Oct 22 - Mon, Oct 27
American Airlines Logo
12:34 am - 9:09 amSEA-STL
6h 35m1 stop
American Airlines Logo
9:38 am - 2:48 pmSTL-SEA
7h 10m1 stop
$198American Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 8
American Airlines Logo
12:27 am - 9:57 amSEA-STL
7h 30m1 stop
American Airlines Logo
5:54 pm - 11:11 pmSTL-SEA
7h 17m1 stop
$203American Airlines
Find Deal
Tue, Jan 6 - Sun, Jan 11
Delta Logo
5:00 pm - 12:24 amSEA-STL
5h 24m1 stop
Delta Logo
7:30 pm - 11:59 pmSTL-SEA
6h 29m1 stop
$209Delta
Find Deal
Fri, Oct 17 - Mon, Oct 20
Alaska Airlines Logo
6:00 am - 3:31 pmSEA-STL
7h 31m1 stop
Alaska Airlines Logo
6:33 am - 9:05 amSTL-SEA
4h 32mnonstop
$224Alaska Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18
Alaska Airlines Logo
9:15 am - 3:18 pmSEA-STL
4h 03mnonstop
Alaska Airlines Logo
7:00 am - 9:33 amSTL-SEA
4h 33mnonstop
$228Alaska Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Delta Logo
5:50 pm - 11:22 pmSEA-MCI
3h 32mnonstop
Delta Logo
7:40 am - 9:52 amMCI-SEA
4h 12mnonstop
$233Delta
Find Deal
Sun, Dec 14 - Sun, Jan 4
Hawaiian Airlines Logo
6:02 pm - 12:03 amSEA-STL
4h 01mnonstop
Hawaiian Airlines Logo
6:33 am - 9:05 amSTL-SEA
4h 32mnonstop
$238Hawaiian Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18
Hawaiian Airlines Logo
8:00 am - 1:52 pmSEA-STL
3h 52mnonstop
Hawaiian Airlines Logo
2:55 pm - 5:21 pmSTL-SEA
4h 26mnonstop
$247Hawaiian Airlines
Find Deal
Wed, Jan 7 - Sun, Jan 11

Frontier flights from Seattle to Missouri

Our best Frontier deals on Seattle to Missouri flight tickets
Frontier
Oct 3
SEA6:12 amSeattle/Tacoma Intl
24h 54m
1 stop
STL9:06 amLambert-St Louis
Oct 6
STL7:55 pmLambert-St Louis
18h 12m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
$191
Find similar
Frontier
Oct 22
SEA8:43 pmSeattle/Tacoma Intl
21h 10m
1 stop
MCI7:53 pmKansas City
Oct 27
MCI8:38 pmKansas City
17h 35m
1 stop
SEA12:13 pmSeattle/Tacoma Intl
$197
Find similar
Frontier
Oct 14
SEA1:02 pmSeattle/Tacoma Intl
26h 53m
1 stop
MCI5:55 pmKansas City
Oct 22
MCI7:02 pmKansas City
19h 05m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
$203
Find similar

American Airlines flights from Seattle to Missouri

Our best American Airlines deals on Seattle to Missouri flight tickets
American Airlines
Oct 31
SEA12:34 amSeattle/Tacoma Intl
6h 35m
1 stop
STL9:09 amLambert-St Louis
Nov 8
STL9:38 amLambert-St Louis
7h 10m
1 stop
SEA2:48 pmSeattle/Tacoma Intl
$198
Find similar
American Airlines
Jan 6
SEA12:27 amSeattle/Tacoma Intl
7h 30m
1 stop
STL9:57 amLambert-St Louis
Jan 11
STL5:54 pmLambert-St Louis
7h 17m
1 stop
SEA11:11 pmSeattle/Tacoma Intl
$203
Find similar
American Airlines
Oct 1
SEA11:40 amSeattle/Tacoma Intl
6h 35m
1 stop
STL8:15 pmLambert-St Louis
Oct 8
STL6:39 amLambert-St Louis
8h 01m
1 stop
SEA12:40 pmSeattle/Tacoma Intl
$232
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Missouri 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, momondo users made 832,500 searches. Data last updated September 19, 2025.
Use the filters below to find and compare flights from Seattle to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 10/3

6:12 am-9:06 am

1 stop24h 54m

Lambert-St Louis

Mon 10/6

7:55 pm-12:07 pm

1 stop18h 12m

$191

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Wed 10/22

8:43 pm-7:53 pm

1 stop21h 10m

Kansas City

Mon 10/27

8:38 pm-12:13 pm

1 stop17h 35m

$197

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 10/31

12:34 am-9:09 am

1 stop6h 35m

Lambert-St Louis

Sat 11/8

9:38 am-2:48 pm

1 stop7h 10m

$198

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 1/6

12:27 am-9:57 am

1 stop7h 30m

Lambert-St Louis

Sun 1/11

5:54 pm-11:11 pm

1 stop7h 17m

$203

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 10/17

5:00 pm-12:24 am

1 stop5h 24m

Lambert-St Louis

Mon 10/20

7:30 pm-11:59 pm

1 stop6h 29m

$209

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 10/11

6:00 am-3:31 pm

1 stop7h 31m

Lambert-St Louis

Sat 10/18

6:33 am-9:05 am

Nonstop4h 32m

$224

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 11/1

9:15 am-3:18 pm

Nonstop4h 03m

Lambert-St Louis

Sat 11/8

7:00 am-9:33 am

Nonstop4h 33m

$228

SeattleKansas City

SEA - MCI

SEAMCI

Seattle/Tacoma Intl

Sun 12/14

5:50 pm-11:22 pm

Nonstop3h 32m

Kansas City

Sun 1/4

7:40 am-9:52 am

Nonstop4h 12m

$233

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 10/11

6:02 pm-12:03 am

Nonstop4h 01m

Lambert-St Louis

Sat 10/18

6:33 am-9:05 am

Nonstop4h 32m

$238

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 1/7

8:00 am-1:52 pm

Nonstop3h 52m

Lambert-St Louis

Sun 1/11

2:55 pm-5:21 pm

Nonstop4h 26m

$247

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Missouri from

How to get the cheapest flight ticket from Seattle 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?

In general, October is the cheapest month to fly from Seattle to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $336. If you aren’t able to travel to Missouri during the month of October, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $360.

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

The cheapest day to depart from Seattle to Missouri is on a Thursday when prices can be found for as low as $392. Flights from Seattle to Missouri on a Sunday will generally be more expensive and average around $487. 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 Seattle 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 $440. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

Fly from Seattle/Tacoma Intl to Lambert-St Louis for the best Seattle/Tacoma Intl - 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 Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $395 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Seattle for as low as $262 on momondo.

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

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

You could potentially save up to 7% on your flight if you consider stops on a Seattle to Missouri flight.

Cheap Seattle to Missouri flight deals and tips

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

Best Price Found

$169

Fastest flight time

3h 26m

Direct flights

Every day

Airports in Missouri

2 airports
The best one-way flight to Missouri from Seattle in the past 72 hours is $169. The best round-trip flight deal from Seattle to Missouri found on momondo in the last 72 hours is $289.
The fastest flight from Seattle to Missouri takes 3h 26m
Direct flights go from Seattle to Missouri every day.
There are 2 airports near Missouri: Kansas City (MCI), Lambert-St Louis (STL)
Search flight deals

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Missouri.

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

    The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Seattle to Missouri

Compare and see reviews for airlines that fly from Seattle to Missouri with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $118Free CancellationRating
5.8
3,171 reviews
Search Frontier flights
DeltaPriceFrom $137Free CancellationRating
7.9
7,964 reviews
Search Delta flights
Spirit AirlinesPriceFrom $168Free CancellationRating
6.3
8,030 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $178Free CancellationRating
7.8
2,732 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $186Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $188Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $216Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $223Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Why use momondo?

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

It is quick and easy to find Seattle 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 Seattle to Missouri with flexible booking policies on momondo?

All flight searches from Seattle to Missouri on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Missouri from Seattle.

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

Price alerts on flights to Missouri from Seattle 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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