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$90+ Cheap flights from Kansas City to Seattle (MCI - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — SEA
juil. 15 — juil. 221
mer. 7/15
mer. 7/22
1 adult, Economy
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Find cheap flights from Kansas City to Seattle with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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Cheapflights Tip: The best prices from Kansas City to Seattle/Tacoma Intl are usually found in February or April, booked 24 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Kansas City to Seattle

Cheapest flights from Kansas City to Seattle
Explore the most affordable flight options available from Kansas City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juin 15, 2026.

This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/147:15 pm
MCI
-
SEA
1 stop7h 25m
Southwest
sam. 9/196:00 am
SEA
-
MCI
2 stops7h 10m
Southwest
Deal found 6/11$368
This CheapOair deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/174:32 pm
MCI
-
SEA
1 stop20h 07m
Frontier
lun. 7/2012:35 pm
SEA
-
MCI
1 stop22h 25m
Frontier
Deal found 6/10$369
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/47:15 am
MCI
-
SEA
Nonstop3h 57m
Delta
jeu. 8/135:30 pm
SEA
-
MCI
Nonstop3h 32m
Delta
Deal found 6/15$370
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 8/27:58 pm
MCI
-
SEA
Nonstop4h 00m
Alaska Airlines
mer. 8/126:27 pm
SEA
-
MCI
Nonstop3h 32m
Alaska Airlines
Deal found 6/12$371
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 8/51:45 pm
MCI
-
SEA
1 stop21h 19m
Frontier
mar. 8/118:13 pm
SEA
-
MCI
2 stops14h 47m
Frontier
Deal found 6/12$372
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/229:29 am
MCI
-
SEA
1 stop7h 51m
American Airlines
lun. 10/2611:30 pm
SEA
-
MCI
1 stop9h 12m
American Airlines
Deal found 6/11$373
This Booking.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/81:45 pm
MCI
-
SEA
1 stop21h 32m
Multiple Airlines
lun. 7/136:27 pm
SEA
-
MCI
Nonstop3h 32m
Multiple Airlines
Deal found 6/10$374
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/227:53 pm
MCI
-
SEA
1 stop7h 04m
American Airlines
mar. 8/411:22 pm
SEA
-
MCI
1 stop7h 37m
American Airlines
Deal found 6/12$375
This Super.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/22:17 pm
MCI
-
SEA
1 stop12h 10m
Frontier
dim. 10/117:41 pm
SEA
-
MCI
1 stop15h 41m
Frontier
Deal found 6/14$376
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/291:45 pm
MCI
-
SEA
1 stop23h 35m
Frontier
mar. 8/117:06 pm
SEA
-
MCI
1 stop15h 54m
Frontier
Deal found 6/11$377
This Super.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 6/241:45 pm
MCI
-
SEA
1 stop26h 33m
Frontier
jeu. 7/27:41 pm
SEA
-
MCI
1 stop15h 19m
Frontier
Deal found 6/10$378

Find flight deals from Kansas City to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Kansas City (MCI) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated juin 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$368
(CheapOair)

One-way from

$90
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$427
Provider with most accurate pricing for Kansas City-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kansas City-Seattle/Tacoma Intl flights.
Search Deals
From Kansas City to Seattle/Tacoma Intl
Search Deals
One-way flight from Kansas City to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated juin 15, 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 - SEA

MCISEA

Kansas City

lun. 8/17

7:42 am-2:50 pm

1 stop9h 08m

Seattle/Tacoma Intl

mer. 8/26

5:30 pm-11:02 pm

Nonstop3h 32m

$380

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

mer. 9/2

7:15 am-9:12 am

Nonstop3h 57m

Seattle/Tacoma Intl

dim. 9/6

5:45 am-2:08 pm

1 stop6h 23m

$381

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

dim. 8/16

7:42 am-2:50 pm

1 stop9h 08m

Seattle/Tacoma Intl

mar. 8/25

5:30 pm-11:02 pm

Nonstop3h 32m

$381
Quickest round-trip

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

lun. 8/24

2:48 pm-6:51 pm

1 stop6h 03m

Seattle/Tacoma Intl

mar. 9/1

8:14 am-1:52 pm

Nonstop3h 38m

$397

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

lun. 8/3

7:42 am-2:50 pm

1 stop9h 08m

Seattle/Tacoma Intl

mar. 8/11

5:30 pm-11:02 pm

Nonstop3h 32m

$397

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

mer. 8/12

5:50 pm-10:27 pm

1 stop6h 37m

Seattle/Tacoma Intl

mer. 8/26

6:27 pm-11:59 pm

Nonstop3h 32m

$401

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

jeu. 10/15

7:40 pm-12:11 am

1 stop6h 31m

Seattle/Tacoma Intl

sam. 10/24

5:45 am-1:13 pm

1 stop5h 28m

$405

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

lun. 10/12

7:40 pm-12:11 am

1 stop6h 31m

Seattle/Tacoma Intl

jeu. 10/22

5:45 am-1:13 pm

1 stop5h 28m

$405

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

sam. 8/8

5:40 pm-10:00 pm

1 stop6h 20m

Seattle/Tacoma Intl

sam. 8/22

7:16 am-7:12 pm

1 stop9h 56m

$405

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

mar. 10/27

6:12 pm-10:25 pm

1 stop6h 13m

Seattle/Tacoma Intl

mer. 10/28

7:17 am-5:18 pm

1 stop8h 01m

$411

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from Kansas City to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Kansas City to Seattle in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Kansas City-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Kansas City-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Kansas City-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Kansas City-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Kansas City-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Kansas City to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Kansas City with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Kansas City to Seattle

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

The price you pay for your flight from Kansas City to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Kansas City to Seattle?

Currently, February is the cheapest month in which you can book a flight from Kansas City to Seattle (average of $228). Flying from Kansas City to Seattle in July is currently the most expensive (average of $463). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MCI to SEA?

Find hourly flight availability from Kansas City to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated juin 15, 2026.

It’s optimal to fly from Kansas City to Seattle in the evening. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Kansas City to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Kansas City to Seattle. Price data was last updated on June 13, 2026.

Travelers seeking maximum savings on their Kansas City to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Kansas City to Seattle?

The best insider tips for Kansas City to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to Seattle trip
Our travel experts
Matt Meltzer

Matt Meltzer

Expert on MCI

Matt Meltzer has been a travel writer for over a decade, covering U.S. domestic locations and hotels for Thrillist, Fifty Grande, Matador Network, Conde Nast Traveler, and other top publications. He's won multiple travel journalism awards from the Society of American Travel Writers and North American Travel Journalists Association, and currently resides in South Florida.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated juin 15, 2026.
Read through reviews of airlines operating flights from Kansas City to Seattle, such as Alaska Airlines,Delta, andHawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Alaska Airlines
7.9
Good
12,516 reviews
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Delta
7.9
Good
8,403 reviews
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Hawaiian Airlines
7.8
Good
2,829 reviews
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
American Airlines
7.1
Good
11,662 reviews
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Frontier
5.6
Fair
2,883 reviews
Alaska Airlines
7.9
Good
12,516 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.

Related info for your journey

Find useful and relevant information for your journey from Kansas City to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Kansas City to Seattle?

    To fly from Kansas City to Seattle, you need to book a flight from Kansas City (MCI) to Seattle/Tacoma Intl (SEA). Nonstop flights to Seattle/Tacoma Intl from Kansas City take 3h 55m on average. When it comes time to book airfare, you have a few options: there are 10 outbound flights from Kansas City to Seattle/Tacoma Intl offered by 7 different airlines.

  • How popular is this Kansas City to Seattle flight route?

    The Kansas City to Seattle/Tacoma Intl flight path was viewed by 85 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Kansas City to Seattle?

    Delta and Alaska Airlines can get you from Kansas City to Seattle in just under 6h 03m. Your travel time can differ by up to 3h 05m. Kansas City and Seattle are separated by a distance of 1485 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Kansas City to Seattle round-trip?

    Currently priced at $113, Frontier will fly you from Kansas City to Seattle and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Delta - these airlines can fly you to your destination from $152 and $157, respectively. Users have found that Frontier is 66% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Kansas City to Seattle one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $42. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Kansas City to Seattle for a low price.

  • What are the most reliable airlines from Kansas City to Seattle?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Kansas City to Seattle on time: Scandinavian Airlines (100%), STARLUX Airlines (96%), Alaska Airlines (93%).

  • What are the cheapest flights from Kansas City to Seattle?

    While on average a flight from Kansas City to Seattle is generally $850, our data shows the cheapest flight currently is $218. When looking at the most popular route, (Kansas City - Seattle/Tacoma Intl), you can expect to pay $319 for that flight.

  • Can I find deals for flights from Kansas City to Seattle that include hotel bookings?

    Yes. In addition to deals on Kansas City to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Kansas City to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kansas City to Seattle.

  • Can I find deals for business class flights from Kansas City to Seattle?

    Yes. Cheapflights offers flight deals from Kansas City to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Kansas City to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Kansas City to Seattle (average of $228). Flying from Kansas City to Seattle in July is currently the most expensive (average of $463). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Kansas City to Seattle

Discover the top 7 airlines that operate flights from Kansas City to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated juin 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$238FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$152Average$364FlexibilityNo cancel feeOn-time63%
DeltaCheapest$157Average$371FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$198Average$400FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$208Average$347FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$216Average$369FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$337Average$487FlexibilityNo cancel feeOn-time71%

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