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Cheap flights from Kansas City to Seattle from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Kansas City to Seattle departing on 9/14. 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 Kansas City to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:30 pm - 9:42 amMCI  Kansas City-SEA Seattle/Tacoma Intl
13h 12m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:27 pm - 11:59 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 32mnonstop
$336Multiple Airlines
Mon, Sep 28 - Mon, Oct 12
Multiple Airlines Logo
10:30 pm - 9:42 amMCI  Kansas City-SEA Seattle/Tacoma Intl
13h 12m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:27 pm - 11:59 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 32mnonstop
$336Multiple Airlines
Mon, Sep 28 - Sat, Oct 3
Frontier Logo
8:32 pm - 3:08 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
20h 36m1 stop Denver Intl
Frontier Logo
9:45 pm - 9:45 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
22h 00m1 stop Las Vegas Harry Reid Intl
$337Frontier
Wed, Sep 9 - Sat, Sep 12
Frontier Logo
1:38 pm - 9:19 amMCI  Kansas City-SEA Seattle/Tacoma Intl
21h 41m1 stop Denver Intl
Frontier Logo
9:45 pm - 10:25 amSEA  Seattle/Tacoma Intl-MCI Kansas City
34h 40m2 stops Las Vegas Harry Reid Intl Denver Intl
$338Frontier
Sun, Sep 6 - Sat, Sep 12
Alaska Airlines Logo
2:48 pm - 6:51 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
6h 03m1 stop Portland
Alaska Airlines Logo
6:27 pm - 11:59 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 32mnonstop
$341Alaska Airlines
Sat, Sep 5 - Tue, Sep 8
Alaska Airlines Logo
6:00 am - 8:18 amMCI  Kansas City-SEA Seattle/Tacoma Intl
4h 18mnonstop
Alaska Airlines Logo
8:00 am - 3:58 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
5h 58m1 stop Portland
$341Alaska Airlines
Thu, Nov 26 - Thu, Dec 3
Delta Logo
7:24 am - 9:15 amMCI  Kansas City-SEA Seattle/Tacoma Intl
3h 51mnonstop
Delta Logo
5:40 pm - 11:16 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 36mnonstop
$345Delta
Wed, Sep 30 - Mon, Oct 5
Delta Logo
7:15 am - 9:12 amMCI  Kansas City-SEA Seattle/Tacoma Intl
3h 57mnonstop
Delta Logo
5:30 pm - 11:02 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
3h 32mnonstop
$345Delta
Mon, Aug 31 - Mon, Sep 7
United Airlines Logo
7:11 pm - 11:04 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
5h 53m1 stop Denver Intl
United Airlines Logo
5:00 am - 12:37 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
5h 37m1 stop Denver Intl
$351United Airlines
Wed, Sep 2 - Sun, Sep 6
United Airlines Logo
5:13 pm - 11:04 pmMCI  Kansas City-SEA Seattle/Tacoma Intl
7h 51m1 stop Denver Intl
United Airlines Logo
5:00 am - 12:37 pmSEA  Seattle/Tacoma Intl-MCI Kansas City
5h 37m1 stop Denver Intl
$351United Airlines
Wed, Sep 2 - Sun, Sep 6

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Delta flights from Kansas City to Seattle

Our best Delta deals on Kansas City to Seattle flight tickets
Delta
Sep 2
MCI7:08 amKansas City
3h 51m
SEA8:59 amSeattle/Tacoma Intl
Sep 12
SEA5:40 pmSeattle/Tacoma Intl
3h 36m
MCI11:16 pmKansas City
$345
Delta
Sep 5
MCI7:08 amKansas City
3h 51m
SEA8:59 amSeattle/Tacoma Intl
Sep 12
SEA5:40 pmSeattle/Tacoma Intl
3h 36m
MCI11:16 pmKansas City
$347
Delta
Sep 5
MCI7:08 amKansas City
3h 51m
SEA8:59 amSeattle/Tacoma Intl
Sep 12
SEA12:00 pmSeattle/Tacoma Intl
8h 14m
1 stop
MCI10:14 pmKansas City
$357

Southwest flights from Kansas City to Seattle

Our best Southwest deals on Kansas City to Seattle flight tickets
Southwest
Aug 29
MCI12:20 pmKansas City
8h 35m
2 stops
SEA6:55 pmSeattle/Tacoma Intl
Sep 5
SEA9:15 amSeattle/Tacoma Intl
8h 00m
1 stop
MCI7:15 pmKansas City
$356
Southwest
Oct 8
MCI7:40 pmKansas City
7h 55m
1 stop
SEA1:35 amSeattle/Tacoma Intl
Oct 10
SEA6:30 amSeattle/Tacoma Intl
9h 10m
2 stops
MCI5:40 pmKansas City
$370
Southwest
Sep 2
MCI11:30 amKansas City
10h 45m
2 stops
SEA8:15 pmSeattle/Tacoma Intl
Sep 12
SEA5:30 amSeattle/Tacoma Intl
10h 55m
2 stops
MCI6:25 pmKansas City
$375

momondo Fare Finder

 
Customize your flight search to find flights from Kansas City 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 9, 2026.
Use the filters below to find and compare flights from Kansas City to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Mon 9/28

10:30 pm-9:42 am

1 stop13h 12m

Seattle/Tacoma Intl

Mon 10/12

6:27 pm-11:59 pm

Nonstop3h 32m

$336

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Mon 9/28

10:30 pm-9:42 am

1 stop13h 12m

Seattle/Tacoma Intl

Sat 10/3

6:27 pm-11:59 pm

Nonstop3h 32m

$336

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Wed 9/9

8:32 pm-3:08 pm

1 stop20h 36m

Seattle/Tacoma Intl

Sat 9/12

9:45 pm-9:45 pm

1 stop22h 00m

$337

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Sun 9/6

1:38 pm-9:19 am

1 stop21h 41m

Seattle/Tacoma Intl

Sat 9/12

9:45 pm-10:25 am

2 stops34h 40m

$338

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Sat 9/5

2:48 pm-6:51 pm

1 stop6h 03m

Seattle/Tacoma Intl

Tue 9/8

6:27 pm-11:59 pm

Nonstop3h 32m

$341

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Thu 11/26

6:00 am-8:18 am

Nonstop4h 18m

Seattle/Tacoma Intl

Thu 12/3

8:00 am-3:58 pm

1 stop5h 58m

$341
Quickest round-trip

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

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

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Mon 8/31

7:15 am-9:12 am

Nonstop3h 57m

Seattle/Tacoma Intl

Mon 9/7

5:30 pm-11:02 pm

Nonstop3h 32m

$345

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Wed 9/2

7:11 pm-11:04 pm

1 stop5h 53m

Seattle/Tacoma Intl

Sun 9/6

5:00 am-12:37 pm

1 stop5h 37m

$351

Kansas CitySeattle

MCI Kansas City - SEA Seattle/Tacoma Intl

MCISEA

Kansas City

Wed 9/2

5:13 pm-11:04 pm

1 stop7h 51m

Seattle/Tacoma Intl

Sun 9/6

5:00 am-12:37 pm

1 stop5h 37m

$351

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 $361 to $493.
The lowest price recently found on this route was $336.

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 $228. 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 $238.

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

On average, the least expensive day to fly to Seattle from Kansas City is on a Thursday. momondo users have found tickets for Thursday departures for as low as $483. 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 Kansas City because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $625.

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

Flying to Seattle from Kansas City in the evening is the least expensive time of day to depart. momondo users have found prices as low as $468 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $545. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $351 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 $323 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.

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

As of August 2026, prices for Kansas City to Seattle flights are approximately 9% 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

$288

Fastest flight time

3h 51m

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 $288. The best round-trip flight deal from Kansas City to Seattle found on momondo in the last 72 hours is $406.
The fastest flight from Kansas City to Seattle takes 3h 51m
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 3h 51m.

  • 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
FrontierPriceFrom $113Free CancellationRating
5.6
2,715 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $138Free CancellationRating
7.8
2,818 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $152Free CancellationRating
8.0
4,214 reviews
Search Southwest flights
DeltaPriceFrom $158Free CancellationRating
7.8
8,504 reviews
Search Delta flights
Alaska AirlinesPriceFrom $199Free CancellationRating
7.9
12,792 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $216Free CancellationRating
7.4
10,098 reviews
Search United Airlines flights
American AirlinesPriceFrom $337Free CancellationRating
7.1
11,903 reviews
Search American Airlines flights

  • Southwest Flights From Kansas City to Seattle

    Southwest operates around 1 flight from Kansas City to Seattle every week. The average price of these flights found in the last 72 hours has been $422, but momondo users have found Southwest deals from Kansas City to Seattle from as low as $152 round-trip. Southwest has been scored 8.0/10 in 4,214 reviews.

  • Alaska Airlines Flights From Kansas City to Seattle

    Another popular option for Kansas City to Seattle flights is Alaska Airlines (7.9/10, 12,792 ratings). Alaska Airlines flies from Kansas City to Seattle around 9 times per week, with deals starting from $199 round-trip and rising to an average price of around $419.

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
Federal Way
Puyallup
Tukwila
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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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