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Cheap flights from Kansas City to Seattle from $129

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Kansas City to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:45 pm - 6:42 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
7h 57m1 stop Las Vegas Harry Reid Intl
Frontier Logo
2:29 pm - 7:30 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
27h 01m1 stop Denver Intl
$257Frontier
Sat, Dec 19 - Sat, Jan 9
Frontier Logo
8:05 pm - 12:11 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
18h 06m1 stop Denver Intl
Frontier Logo
4:29 pm - 7:36 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
25h 07m1 stop Denver Intl
$260Frontier
Tue, Jan 12 - Wed, Jan 20
Southwest Logo
6:05 am - 12:10 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
8h 05m1 stop Phoenix Sky Harbor Intl
Southwest Logo
5:40 am - 2:20 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
6h 40m1 stop Phoenix Sky Harbor Intl
$377Southwest
Fri, Dec 25 - Tue, Jan 26
Southwest Logo
5:30 pm - 10:20 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
6h 50m1 stop Las Vegas Harry Reid Intl
Southwest Logo
8:40 pm - 7:50 amSEA  Seattle/Tacoma Intl-MCI Kansas City
9h 10m1 stop Denver Intl
$382Southwest
Wed, Dec 16 - Tue, Dec 22
United Airlines Logo
3:22 pm - 11:12 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
9h 50m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
3:50 pm - 11:44 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
5h 54m1 stop Denver Intl
$382United Airlines
Fri, Feb 19 - Fri, Feb 26
United Airlines Logo
5:19 pm - 9:21 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
6h 02m1 stop Denver Intl
United Airlines Logo
12:25 pm - 11:44 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
9h 19m2 stops Los Angeles Denver Intl
$382United Airlines
Fri, Dec 4 - Fri, Dec 11
Multiple Airlines Logo
8:29 pm - 3:40 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
21h 11m1 stop Denver Intl
Multiple Airlines Logo
9:55 am - 3:23 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 28mnonstop
$384Multiple Airlines
Tue, Dec 1 - Sat, Dec 5
Multiple Airlines Logo
4:19 pm - 6:32 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
4h 13mnonstop
Multiple Airlines Logo
4:58 pm - 7:35 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
24h 37m1 stop Denver Intl
$404Multiple Airlines
Mon, Dec 7 - Mon, Dec 14
Alaska Airlines Logo
4:19 pm - 6:32 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
4h 13mnonstop
Alaska Airlines Logo
6:34 pm - 11:59 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 25mnonstop
$407Alaska Airlines
Mon, Dec 7 - Sun, Dec 13
Alaska Airlines Logo
6:30 am - 8:50 amMCI  Kansas City-SEA Seattle/Tacoma Intl
4h 20mnonstop
Alaska Airlines Logo
9:55 am - 3:23 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 28mnonstop
$407Alaska Airlines
Sun, Dec 6 - Mon, Dec 14

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Frontier flights from Kansas City to Seattle

Our best Frontier deals on Kansas City to Seattle flight tickets
Frontier
Dec 19
MCI12:45 pmKansas City
7h 57m
1 stop
SEA6:42 pmSeattle/Tacoma Intl
Jan 9
SEA2:29 pmSeattle/Tacoma Intl
27h 01m
1 stop
MCI7:30 pmKansas City
$257
Frontier
Jan 12
MCI8:05 pmKansas City
18h 06m
1 stop
SEA12:11 pmSeattle/Tacoma Intl
Jan 20
SEA4:29 pmSeattle/Tacoma Intl
25h 07m
1 stop
MCI7:36 pmKansas City
$260
Frontier
Dec 15
MCI8:32 pmKansas City
21h 11m
1 stop
SEA3:43 pmSeattle/Tacoma Intl
Jan 9
SEA2:29 pmSeattle/Tacoma Intl
27h 01m
1 stop
MCI7:30 pmKansas City
$263

Alaska Airlines flights from Kansas City to Seattle

Our best Alaska Airlines deals on Kansas City to Seattle flight tickets
Alaska Airlines
Nov 23
MCI7:00 amKansas City
4h 11m
SEA9:11 amSeattle/Tacoma Intl
Nov 25
SEA6:32 pmSeattle/Tacoma Intl
3h 27m
MCI11:59 pmKansas City
$425
Alaska Airlines
Nov 23
MCI7:00 amKansas City
4h 11m
SEA9:11 amSeattle/Tacoma Intl
Nov 26
SEA9:21 amSeattle/Tacoma Intl
3h 27m
MCI2:48 pmKansas City
$472
Alaska Airlines
Nov 22
MCI7:00 amKansas City
4h 11m
SEA9:11 amSeattle/Tacoma Intl
Nov 25
SEA6:32 pmSeattle/Tacoma Intl
3h 27m
MCI11:59 pmKansas City
$474

momondo Fare Finder

 
Use the filters below to find and compare flights from Kansas City to Seattle that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Sat 12/19

12:45 pm-6:42 pm

1 stop7h 57m

Seattle/Tacoma Intl

Sat 1/9

2:29 pm-7:30 pm

1 stop27h 01m

$257

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Tue 1/12

8:05 pm-12:11 pm

1 stop18h 06m

Seattle/Tacoma Intl

Wed 1/20

4:29 pm-7:36 pm

1 stop25h 07m

$260

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Fri 12/25

6:05 am-12:10 pm

1 stop8h 05m

Seattle/Tacoma Intl

Tue 1/26

5:40 am-2:20 pm

1 stop6h 40m

$377

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Wed 12/16

5:30 pm-10:20 pm

1 stop6h 50m

Seattle/Tacoma Intl

Tue 12/22

8:40 pm-7:50 am

1 stop9h 10m

$382

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Fri 2/19

3:22 pm-11:12 pm

2 stops9h 50m

Seattle/Tacoma Intl

Fri 2/26

3:50 pm-11:44 pm

1 stop5h 54m

$382

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Fri 12/4

5:19 pm-9:21 pm

1 stop6h 02m

Seattle/Tacoma Intl

Fri 12/11

12:25 pm-11:44 pm

2 stops9h 19m

$382

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Tue 12/1

8:29 pm-3:40 pm

1 stop21h 11m

Seattle/Tacoma Intl

Sat 12/5

9:55 am-3:23 pm

Nonstop3h 28m

$384

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Mon 12/7

4:19 pm-6:32 pm

Nonstop4h 13m

Seattle/Tacoma Intl

Mon 12/14

4:58 pm-7:35 pm

1 stop24h 37m

$404
Quickest round-trip

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Mon 12/7

4:19 pm-6:32 pm

Nonstop4h 13m

Seattle/Tacoma Intl

Sun 12/13

6:34 pm-11:59 pm

Nonstop3h 25m

$407

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Sun 12/6

6:30 am-8:50 am

Nonstop4h 20m

Seattle/Tacoma Intl

Mon 12/14

9:55 am-3:23 pm

Nonstop3h 28m

$407

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 Kansas City 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 typical price of a round-trip flight between Kansas City and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $377 to $492.
The lowest price recently found on this route was $257.

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Kansas City to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $218. If you don’t want to visit Seattle in February, then you should wait until April to fly from Kansas City, when ticket prices are also cheap, with an average price of $234.

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

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

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

You are more likely to see cheaper flights to Seattle from Kansas City when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $385 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Kansas City for as low as $349 on momondo.

What cabin class options are available on Kansas City to Seattle flights?

There are 4 cabin classes available to choose from on Kansas City 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 Kansas City to Seattle flights?

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

How have Kansas City to Seattle flight prices changed over time?

As of November 2026, prices for Kansas City to Seattle flights are approximately 199% more expensive when compared to flights at the same time last year.

When to book flights from Kansas City to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Kansas City to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Kansas City to Seattle (MCI to SEA) flight deals and tips

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

Best Price Found

$129

Fastest flight time

4h 01m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Kansas City in the past 72 hours is $129. The best round-trip flight deal from Kansas City to Seattle found on momondo in the last 72 hours is $257.
The fastest flight from Kansas City to Seattle takes 4h 01m
Direct flights go from Kansas City to Seattle every day.
There is 1 airport in Seattle. From Kansas City there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Kansas City to Seattle

  • How far is Kansas City to Seattle/Tacoma Intl by plane?

    Kansas City and Seattle/Tacoma Intl are 1503.6 mi apart from one another. In terms of flight time, this usually takes a little over 4h 01m.

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

    Prices for flights from Kansas City Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

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

    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 Kansas City Airport 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 Kansas City to Seattle?

  • What is the most popular airline from Kansas City to Seattle?

Best airlines flying from Kansas City to Seattle

Compare and see reviews for airlines that fly from Kansas City to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $158Free CancellationRating
7.8
8,703 reviews
Search Delta flights
Alaska AirlinesPriceFrom $199Free CancellationRating
7.9
13,157 reviews
Search Alaska Airlines flights
FrontierPriceFrom $208Free CancellationRating
5.5
2,507 reviews
Search Frontier flights
United AirlinesPriceFrom $216Free CancellationRating
7.3
10,471 reviews
Search United Airlines flights
SouthwestPriceFrom $218Free CancellationRating
8.0
4,219 reviews
Search Southwest flights
American AirlinesPriceFrom $276Free CancellationRating
7.0
12,228 reviews
Search American Airlines flights

  • Alaska Airlines Flights From Kansas City to Seattle

    Alaska Airlines operates around 2 flights from Kansas City to Seattle every week. The average price of these flights found in the last 72 hours has been $437, but momondo users have found Alaska Airlines deals from Kansas City to Seattle from as low as $199 round-trip. Alaska Airlines has been scored 7.9/10 in 13,156 reviews.

  • Delta Flights From Kansas City to Seattle

    Another popular option for Kansas City to Seattle flights is Delta (7.8/10, 8,704 ratings). Delta flies from Kansas City to Seattle around 7 times per week, with deals starting from $158 round-trip and rising to an average price of around $397.

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
Kent
Olympia
Federal Way
Redmond
Lakewood
Lynnwood
Tukwila
Fife
Puyallup
Cle Elum
Marysville
Lacey
Kirkland
Centralia
Bothell

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Kansas City to Seattle for you.

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

Yes. All flights to Seattle from Kansas City on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Kansas City to Seattle?

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 Seattle from Kansas City.

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

Yes. momondo can track prices for Kansas City to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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