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$201+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — SEA
Aug 16 — Aug 231
Sun 8/16
Sun 8/23
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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Cheapflights Tip: The best prices from Kansas City to Seattle/Tacoma Intl are usually found in February or April, booked 52 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 July 17, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/211:38 pm
MCI
-
SEA
1 stop21h 41m
Multiple Airlines
Mon 8/246:27 pm
SEA
-
MCI
Nonstop3h 32m
Multiple Airlines
Deal found 7/15$359
This Southwest deal was found by Cheapflights users on 7/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:15 pm
MCI
-
SEA
1 stop9h 05m
Southwest
Sat 9/126:00 am
SEA
-
MCI
2 stops7h 10m
Southwest
Deal found 7/14$360
This Super.com deal was found by Cheapflights users on 7/14. 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.
Thu 7/304:32 pm
MCI
-
SEA
1 stop20h 07m
Frontier
Mon 8/37:06 pm
SEA
-
MCI
1 stop15h 54m
Frontier
Deal found 7/14$361
This Delta deal was found by Cheapflights users on 7/13. 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.
Sun 8/163:52 pm
MCI
-
SEA
1 stop7h 53m
Delta
Sat 8/295:30 pm
SEA
-
MCI
Nonstop3h 32m
Delta
Deal found 7/13$362
This Travelocity deal was found by Cheapflights users on 7/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:17 pm
MCI
-
SEA
1 stop12h 10m
Multiple Airlines
Fri 10/238:37 am
SEA
-
MCI
1 stop6h 41m
Multiple Airlines
Deal found 7/14$363
This CheapOair deal was found by Cheapflights users on 7/13. 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.
Wed 9/21:34 pm
MCI
-
SEA
Nonstop3h 55m
Alaska Airlines
Sun 9/68:14 am
SEA
-
MCI
Nonstop3h 38m
Alaska Airlines
Deal found 7/13$364
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:58 pm
MCI
-
SEA
Nonstop4h 00m
Multiple Airlines
Fri 8/77:06 pm
SEA
-
MCI
1 stop15h 54m
Multiple Airlines
Deal found 7/15$365
This Southwest deal was found by Cheapflights users on 7/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:20 am
MCI
-
SEA
2 stops8h 45m
Southwest
Sun 9/65:10 am
SEA
-
MCI
2 stops10h 25m
Southwest
Deal found 7/14$366
This Southwest deal was found by Cheapflights users on 7/13. 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.
Mon 8/107:00 pm
MCI
-
SEA
1 stop5h 55m
Southwest
Mon 8/177:00 am
SEA
-
MCI
1 stop7h 55m
Southwest
Deal found 7/13$367
This Kiwi.com deal was found by Cheapflights users on 7/13. 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.
Fri 8/147:58 pm
MCI
-
SEA
Nonstop4h 00m
Multiple Airlines
Sun 8/239:29 pm
SEA
-
MCI
1 stop16h 33m
Multiple Airlines
Deal found 7/13$368
This Kiwi.com deal was found by Cheapflights users on 7/13. 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.
Tue 7/287:58 pm
MCI
-
SEA
Nonstop4h 00m
Multiple Airlines
Wed 7/298:13 pm
SEA
-
MCI
1 stop17h 34m
Multiple Airlines
Deal found 7/13$370

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 July 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$359
(Kiwi.com)

One-way from

$201
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$490
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. 21% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 17, 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

Wed 9/9

2:53 pm-6:51 pm

1 stop5h 58m

Seattle/Tacoma Intl

Sun 9/13

9:59 pm-12:38 pm

1 stop12h 39m

$372

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 10/8

3:35 pm-12:35 am

2 stops11h 00m

Seattle/Tacoma Intl

Sat 10/10

11:05 am-9:05 pm

2 stops8h 00m

$387

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 10/8

7:26 am-2:50 pm

1 stop9h 24m

Seattle/Tacoma Intl

Sat 10/10

7:32 am-6:38 pm

1 stop9h 06m

$397

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 8/13

5:15 pm-12:20 am

1 stop9h 05m

Seattle/Tacoma Intl

Sun 8/16

7:10 am-7:20 pm

2 stops10h 10m

$397

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 10/8

7:26 am-2:50 pm

1 stop9h 24m

Seattle/Tacoma Intl

Mon 10/12

12:30 pm-11:42 pm

1 stop9h 12m

$397

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Sat 10/10

3:30 pm-9:40 pm

2 stops8h 10m

Seattle/Tacoma Intl

Sat 10/17

11:05 am-9:05 pm

2 stops8h 00m

$402

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Sun 10/11

6:13 am-8:18 am

Nonstop4h 05m

Seattle/Tacoma Intl

Wed 10/14

8:37 am-5:18 pm

1 stop6h 41m

$412
Quickest round-trip

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Sat 9/5

1:34 pm-3:29 pm

Nonstop3h 55m

Seattle/Tacoma Intl

Mon 9/7

6:27 pm-11:59 pm

Nonstop3h 32m

$417

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 11/6

9:00 am-6:00 pm

2 stops11h 00m

Seattle/Tacoma Intl

Sun 11/8

6:25 pm-12:35 pm

2 stops16h 10m

$423

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Mon 9/28

6:19 am-2:53 pm

1 stop10h 34m

Seattle/Tacoma Intl

Sat 10/3

1:22 pm-11:44 pm

2 stops8h 22m

$432

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 51 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 $490). 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 July 17, 2026.

It’s optimal to fly from Kansas City to Seattle in the evening. By choosing this option you can save up to 14% 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 July 11, 2026.

Travelers seeking maximum savings on their Kansas City to Seattle flight should consider departing on Wednesday afternoons 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 July 17, 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
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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
12,665 reviews
Alaska Airlines
7.9
Good
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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
7.8
Good
8,479 reviews
Alaska Airlines
7.9
Good
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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
2,823 reviews
Alaska Airlines
7.9
Good
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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
11,822 reviews
Alaska Airlines
7.9
Good
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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
2,795 reviews
Alaska Airlines
7.9
Good
12,665 reviews

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

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 9 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 82 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?

    Alaska Airlines, Southwest, and Delta can get you from Kansas City to Seattle in just under 5h 58m. Your travel time can differ by up to 5h 02m. 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 Hawaiian Airlines and Southwest - these airlines can fly you to your destination from $138 and $152, 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 $45. 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%), Finnair (100%), Japan Airlines (97%).

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

    While on average a flight from Kansas City to Seattle is generally $1,145, our data shows the cheapest flight currently is $222. When looking at the most popular route, (Kansas City - Seattle/Tacoma Intl), you can expect to pay $315 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 $490). 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
Leavenworth
Olympia
Ocean Shores
Edmonds
Snoqualmie
Tumwater
Tukwila
Renton
Kent
Lynnwood
Puyallup
Ellensburg
Fife
Marysville
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$240FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$138Average$327FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$152Average$360FlexibilityNo cancel feeOn-time63%
DeltaCheapest$158Average$376FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$199Average$412FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$216Average$378FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$337Average$487FlexibilityNo cancel feeOn-time71%

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