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Cheap flights from Missouri to Seattle from $69

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 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Missouri to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:58 pm - 9:19 am-
15h 21m
Frontier Logo
8:15 pm - 7:17 pm-
21h 02m
$331Frontier
Sun, Sep 6 - Sun, Sep 20
Southwest Logo
8:30 am - 3:55 pm-
9h 25m
Southwest Logo
2:10 pm - 12:35 am-
8h 25m
$332Southwest
Sat, Sep 26 - Mon, Oct 5
Multiple Airlines Logo
4:42 pm - 7:10 pm-
4h 28mnonstop
Multiple Airlines Logo
9:16 pm - 1:17 am-
26h 01m
$332Multiple Airlines
Wed, Oct 7 - Mon, Oct 12
Multiple Airlines Logo
6:45 pm - 10:39 am-
17h 54m
Multiple Airlines Logo
12:42 pm - 6:38 pm-
3h 56mnonstop
$333Multiple Airlines
Tue, Aug 25 - Tue, Sep 1
Frontier Logo
7:58 pm - 9:19 am-
15h 21m
Frontier Logo
7:25 pm - 9:35 am-
12h 10m
$333Frontier
Mon, Aug 31 - Wed, Sep 16
Alaska Airlines Logo
4:42 pm - 7:10 pm-
4h 28mnonstop
Alaska Airlines Logo
6:03 pm - 11:59 pm-
3h 56mnonstop
$337Alaska Airlines
Sat, Oct 17 - Sat, Oct 24
Alaska Airlines Logo
6:29 am - 8:56 am-
4h 27mnonstop
Alaska Airlines Logo
6:03 pm - 11:59 pm-
3h 56mnonstop
$337Alaska Airlines
Wed, Sep 30 - Sat, Oct 3
Southwest Logo
5:05 am - 4:30 pm-
13h 25m
Southwest Logo
12:10 am - 9:25 am-
7h 15m
$342Southwest
Thu, Oct 1 - Sat, Oct 10
Delta Logo
7:24 am - 9:15 am-
3h 51mnonstop
Delta Logo
5:55 pm - 11:31 pm-
3h 36mnonstop
$345Delta
Sat, Oct 3 - Mon, Oct 12
Delta Logo
7:24 am - 9:15 am-
3h 51mnonstop
Delta Logo
5:40 pm - 11:16 pm-
3h 36mnonstop
$345Delta
Wed, Sep 30 - Mon, Oct 5

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Frontier flights from Missouri to Seattle

Our best Frontier deals on Missouri to Seattle flight tickets
Frontier
Sep 6
STL7:58 pmLambert-St Louis
15h 21m
1 stop
SEA9:19 amSeattle/Tacoma Intl
Sep 20
SEA8:15 pmSeattle/Tacoma Intl
21h 02m
2 stops
STL7:17 pmLambert-St Louis
$331
Frontier
Sep 29
MCI8:32 pmKansas City
20h 36m
1 stop
SEA3:08 pmSeattle/Tacoma Intl
Oct 4
SEA4:27 pmSeattle/Tacoma Intl
25h 10m
1 stop
MCI7:37 pmKansas City
$340
Frontier
Aug 27
STL7:58 pmLambert-St Louis
15h 21m
1 stop
SEA9:19 amSeattle/Tacoma Intl
Aug 30
SEA7:06 pmSeattle/Tacoma Intl
20h 16m
2 stops
STL5:22 pmLambert-St Louis
$341

Delta flights from Missouri to Seattle

Our best Delta deals on Missouri to Seattle flight tickets
Delta
Sep 26
MCI7:24 amKansas City
3h 51m
SEA9:15 amSeattle/Tacoma Intl
Oct 3
SEA5:40 pmSeattle/Tacoma Intl
3h 36m
MCI11:16 pmKansas City
$345
Delta
Sep 3
STL5:34 pmLambert-St Louis
8h 20m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
Sep 17
SEA11:59 pmSeattle/Tacoma Intl
6h 41m
1 stop
STL8:40 amLambert-St Louis
$352
Delta
Oct 3
SGF4:00 pmSpringfield-Branson
9h 58m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
Oct 11
SEA6:00 amSeattle/Tacoma Intl
8h 52m
1 stop
SGF4:52 pmSpringfield-Branson
$359

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Seattle 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 August 4, 2026.
Use the filters below to find and compare flights from Missouri to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sun 9/6

7:58 pm-9:19 am

1 stop15h 21m

Seattle/Tacoma Intl

Sun 9/20

8:15 pm-7:17 pm

2 stops21h 02m

$331

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 9/26

8:30 am-3:55 pm

2 stops9h 25m

Seattle/Tacoma Intl

Mon 10/5

2:10 pm-12:35 am

2 stops8h 25m

$332

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 10/7

4:42 pm-7:10 pm

Nonstop4h 28m

Seattle/Tacoma Intl

Mon 10/12

9:16 pm-1:17 am

1 stop26h 01m

$332

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/25

6:45 pm-10:39 am

1 stop17h 54m

Seattle/Tacoma Intl

Tue 9/1

12:42 pm-6:38 pm

Nonstop3h 56m

$333

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Mon 8/31

7:58 pm-9:19 am

1 stop15h 21m

Seattle/Tacoma Intl

Wed 9/16

7:25 pm-9:35 am

2 stops12h 10m

$333

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 10/17

4:42 pm-7:10 pm

Nonstop4h 28m

Seattle/Tacoma Intl

Sat 10/24

6:03 pm-11:59 pm

Nonstop3h 56m

$337

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 9/30

6:29 am-8:56 am

Nonstop4h 27m

Seattle/Tacoma Intl

Sat 10/3

6:03 pm-11:59 pm

Nonstop3h 56m

$337

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 10/1

5:05 am-4:30 pm

1 stop13h 25m

Seattle/Tacoma Intl

Sat 10/10

12:10 am-9:25 am

1 stop7h 15m

$342
Quickest round-trip

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Sat 10/3

7:24 am-9:15 am

Nonstop3h 51m

Seattle/Tacoma Intl

Mon 10/12

5:55 pm-11:31 pm

Nonstop3h 36m

$345

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Wed 9/30

7:24 am-9:15 am

Nonstop3h 51m

Seattle/Tacoma Intl

Mon 10/5

5:40 pm-11:16 pm

Nonstop3h 36m

$345

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 Seattle from

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?

In general, February 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 $237. If you don’t want to visit Seattle in February, then you should wait until April 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 Friday. momondo users have found tickets for Friday departures for as low as $478. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday 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 $547.

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 $457 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $549. Departure times at noon 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 from Missouri 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 $358 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 $311 on momondo.

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

There are 4 cabin classes available to choose from on Missouri to Seattle 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?

You could potentially save up to 8% on your flight if you consider stops on a Missouri to Seattle flight.

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

$288

Fastest flight time

3h 51m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Missouri in the past 72 hours is $288. The best round-trip flight deal from Missouri to Seattle found on momondo in the last 72 hours is $406.
The fastest flight from Missouri to Seattle takes 3h 51m
Direct flights go from Missouri to Seattle every day.
There is 1 airport in Seattle. From Missouri there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Missouri to Seattle

  • 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?

  • 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?

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
FrontierPriceFrom $119Free CancellationRating
5.6
2,738 reviews
Search Frontier flights
DeltaPriceFrom $136Free CancellationRating
7.8
8,483 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $138Free CancellationRating
7.8
2,819 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $152Free CancellationRating
8.0
4,222 reviews
Search Southwest flights
American AirlinesPriceFrom $188Free CancellationRating
7.1
11,848 reviews
Search American Airlines flights
United AirlinesPriceFrom $193Free CancellationRating
7.4
10,059 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $199Free CancellationRating
7.9
12,762 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Puyallup
Fife
Federal Way
Tukwila
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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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