How popular is this Kansas City to Seattle flight route?

The Kansas City to Seattle/Tacoma Intl flight path was viewed by 84 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 4h 06m. Your travel time will be generally consistent. Kansas City and Seattle are separated by a distance of 1485 mi. Generally, flights for this route are nonstop.

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

Currently priced at $111, Spirit Airlines will fly you from Kansas City to Seattle and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Hawaiian Airlines - these airlines can fly you to your destination from $118 and $138, respectively. Users have found that Spirit Airlines 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 $46. 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.

Weekly flight availability from Kansas City to Seattle

The most flights from MCI to SEA are scheduled on a Thursday (13 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

What are the cheapest flights from Kansas City to Seattle?

While on average a flight from Kansas City to Seattle is generally $687, our data shows the cheapest flight currently is $127. When looking at the most popular route, (Kansas City - Seattle/Tacoma Intl), you can expect to pay $197 for that flight.

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: KLM (100%), Qatar Airways (85%), Japan Airlines (85%).

What are the most popular airlines that fly from Kansas City to Seattle?

Before booking your flight from Kansas City to Seattle check out the most popular airlines for this route: Alaska Airlines, Delta or Hawaiian Airlines.

Most accurate provider : When it comes to deals on Kansas City-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Kansas City-Seattle flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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.

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 59m on average. When it comes time to book airfare, you have a few options: there are 8 outbound flights from Kansas City to Seattle/Tacoma Intl offered by 8 different airlines.

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.

$67+ Flights from Kansas City to Seattle

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Find cheap flights from Kansas City to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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 April or November, booked 52 days in advance, depart on a Thursday or Friday and return on a Tuesday

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 December 18, 2025.

Mon 12/228:45 pmMCI - SEA

2 stops19h 09mMultiple Airlines

Fri 1/99:02 pmSEA - MCI

1 stop24h 31mMultiple Airlines

Deal found 12/15

$358

Mon 12/227:33 amMCI - SEA

Nonstop4h 12mDelta

Fri 1/95:55 pmSEA - MCI

Nonstop3h 28mDelta

Deal found 12/15

$397

Tue 12/308:45 pmMCI - SEA

1 stop17h 45mMultiple Airlines

Tue 1/67:13 pmSEA - MCI

1 stop17h 39mMultiple Airlines

Deal found 12/16

$406

Mon 12/229:44 amMCI - SEA

1 stop9h 25mAmerican Airlines

Fri 1/99:45 pmSEA - MCI

1 stop10h 16mAmerican Airlines

Deal found 12/15

$417

Thu 12/2511:53 amMCI - SEA

2 stops26h 37mFrontier

Sun 1/42:54 pmSEA - MCI

1 stop26h 56mFrontier

Deal found 12/15

$464

Wed 12/248:45 pmMCI - SEA

1 stop17h 45mFrontier

Sat 12/272:54 pmSEA - MCI

1 stop26h 57mFrontier

Deal found 12/15

$478

Tue 12/308:45 pmMCI - SEA

1 stop17h 45mFrontier

Sun 1/42:54 pmSEA - MCI

1 stop26h 56mFrontier

Deal found 12/16

$483

Tue 12/308:45 pmMCI - SEA

1 stop17h 45mMultiple Airlines

Mon 1/51:25 pmSEA - MCI

2 stops23h 27mMultiple Airlines

Deal found 12/16

$487

Wed 12/318:45 pmMCI - SEA

1 stop17h 45mFrontier

Sun 1/42:54 pmSEA - MCI

1 stop26h 56mFrontier

Deal found 12/15

$489

Best flights from Kansas City to Seattle
Discover carefully curated flight deals from Kansas City to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Tue 1/277:00 amMCI - SEA

Nonstop4h 06mDelta

Tue 2/35:55 pmSEA - MCI

Nonstop3h 28mDelta

Deal found 12/17

$197

Tue 1/272:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Tue 2/38:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/16

$197

Wed 1/142:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Wed 1/218:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/16

$197

Fri 1/97:00 amMCI - SEA

Nonstop4h 06mDelta

Fri 1/165:55 pmSEA - MCI

Nonstop3h 28mDelta

Deal found 12/16

$199

Fri 2/132:49 pmMCI - SEA

Nonstop4h 05mAlaska Airlines

Tue 2/178:21 amSEA - MCI

Nonstop3h 34mAlaska Airlines

Deal found 12/17

$198

Wed 1/217:00 amMCI - SEA

Nonstop4h 06mDelta

Wed 1/285:55 pmSEA - MCI

Nonstop3h 28mDelta

Deal found 12/15

$199

Fri 1/162:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Fri 1/235:58 pmSEA - MCI

Nonstop3h 26mAlaska Airlines

Deal found 12/16

$199

Wed 1/147:00 amMCI - SEA

Nonstop4h 06mDelta

Tue 1/2011:10 pmSEA - MCI

1 stop8h 45mDelta

Deal found 12/16

$208

Fri 1/162:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Thu 1/228:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/15

$199

Thu 2/52:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Mon 2/98:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/15

$199

Wed 1/212:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Tue 1/278:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/14

$199

Last-minute flights from Kansas City to Seattle
Discover last-minute flight deals from Kansas City to Seattle. Data last updated December 18, 2025 and is based on user searches.

Wed 1/77:00 amMCI - SEA

1 stop28h 04mMultiple Airlines

Sun 1/1112:26 pmSEA - MCI

1 stop29h 15mMultiple Airlines

Deal found 12/16

$200

Wed 1/142:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Wed 1/218:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/16

$197

Wed 1/142:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Sun 1/258:08 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/16

$198

Thu 1/158:33 pmMCI - SEA

1 stop16h 36mFrontier

Thu 1/2212:34 pmSEA - MCI

1 stop29h 17mFrontier

Deal found 12/17

$175

Thu 1/152:45 pmMCI - SEA

Nonstop4h 06mAlaska Airlines

Fri 1/238:15 amSEA - MCI

Nonstop3h 35mAlaska Airlines

Deal found 12/16

$199

Fri 1/168:27 pmMCI - SEA

1 stop20h 16mFrontier

Thu 1/2212:34 pmSEA - MCI

1 stop29h 17mFrontier

Deal found 12/15

$138

Sun 1/188:27 pmMCI - SEA

1 stop16h 42mFrontier

Sun 1/2512:34 pmSEA - MCI

1 stop29h 17mFrontier

Deal found 12/16

$162

Sun 1/188:27 pmMCI - SEA

1 stop16h 42mMultiple Airlines

Sat 1/2412:54 pmSEA - MCI

1 stop8h 39mMultiple Airlines

Deal found 12/16

$181

Sun 1/258:41 pmMCI - SEA

1 stop16h 38mMultiple Airlines

Fri 1/3010:51 amSEA - MCI

1 stop10h 42mMultiple Airlines

Deal found 12/17

$179

One-way flights from Kansas City to Seattle
Search for one-way flight options from Kansas City to Seattle. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Sun 2/18:41 pmMCI - SEA

1 stop16h 38mFrontier

Deal found 12/15

$67

Wed 2/114:39 pmMCI - SEA

1 stop21h 22mFrontier

Deal found 12/16

$68

Fri 2/277:16 pmMCI - SEA

1 stop18h 45mFrontier

Deal found 12/16

$71

Fri 1/168:27 pmMCI - SEA

1 stop20h 16mFrontier

Deal found 12/15

$72

Thu 2/266:54 pmMCI - SEA

1 stop15h 19mFrontier

Deal found 12/14

$75

Sun 1/188:27 pmMCI - SEA

1 stop16h 42mFrontier

Deal found 12/14

$78

Wed 2/184:39 pmMCI - SEA

1 stop21h 22mFrontier

Deal found 12/16

$80

Sun 1/258:41 pmMCI - SEA

1 stop16h 38mFrontier

Deal found 12/14

$85

Fri 1/98:31 pmMCI - SEA

1 stop19h 03mFrontier

Deal found 12/16

$88

Fri 2/206:51 pmMCI - SEA

1 stop19h 10mFrontier

Deal found 12/14

$89

Thu 1/88:23 pmMCI - SEA

1 stop16h 58mFrontier

Deal found 12/16

$93

Find flight deals from Kansas City to Seattle

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$138 (Kiwi.com)
One-way from	$67 (Trip.com)
Popular in	July
Cheapest in	April
Average price	$327

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. 15% potential increase in price ($60 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Tue 1/27

7:00 am-9:06 am

Nonstop4h 06m

Seattle/Tacoma Intl

Tue 2/3

5:55 pm-11:23 pm

Nonstop3h 28m

$197

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Tue 1/27

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Tue 2/3

8:15 am-1:50 pm

Nonstop3h 35m

$197

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Wed 1/14

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Wed 1/21

8:15 am-1:50 pm

Nonstop3h 35m

$197

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 2/13

2:49 pm-4:54 pm

Nonstop4h 05m

Seattle/Tacoma Intl

Tue 2/17

8:21 am-1:55 pm

Nonstop3h 34m

$198

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 1/9

7:00 am-9:06 am

Nonstop4h 06m

Seattle/Tacoma Intl

Fri 1/16

5:55 pm-11:23 pm

Nonstop3h 28m

$199

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Wed 1/21

7:00 am-9:06 am

Nonstop4h 06m

Seattle/Tacoma Intl

Wed 1/28

5:55 pm-11:23 pm

Nonstop3h 28m

$199

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 1/16

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Fri 1/23

5:58 pm-11:24 pm

Nonstop3h 26m

$199

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Fri 1/16

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Thu 1/22

8:15 am-1:50 pm

Nonstop3h 35m

$199

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Thu 2/5

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Mon 2/9

8:15 am-1:50 pm

Nonstop3h 35m

$199

Kansas CitySeattle

MCI - SEA

MCISEA

Kansas City

Wed 1/21

2:45 pm-4:51 pm

Nonstop4h 06m

Seattle/Tacoma Intl

Tue 1/27

8:15 am-1:50 pm

Nonstop3h 35m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 20 results

Compare providers for flights from Kansas City to Seattle

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
CheapOair	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Trip.com	Price Accuracy2 stars	Trust 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Kansas City-Seattle flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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

Prices

Airlines

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 52 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, April is the cheapest month in which you can book a flight from Kansas City to Seattle (average of $121). Flying from Kansas City to Seattle in July is currently the most expensive (average of $248). 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?

It’s optimal to fly from Kansas City to Seattle in the evening. By choosing this option you can save up to 17% 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?

Travelers seeking maximum savings on their Kansas City to Seattle flight should consider departing on Thursday at noon 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.

The best insider tips for Kansas City to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to Seattle trip

Airports

MCI

MCI's central security checkpoint rarely has long waits, often under 5 minutes, making it convenient for early morning flights.

SEA

Take the Link light rail from SEA to downtown Seattle for an affordable and convenient 40-minute ride.

Our travel experts

Matt Meltzer

Expert on MCI

Brandon Schultz

Expert on SEA

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Kansas City to Seattle, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Alaska Airlines

8.0

Very good

11,475 reviews

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Southwest

7.9

Good

4,249 reviews

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Delta

7.9

Good

8,006 reviews

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Hawaiian Airlines

7.8

Good

2,819 reviews

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

American Airlines

7.2

Good

11,054 reviews

Alaska Airlines

8.0

Very good

11,475 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

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 59m on average. When it comes time to book airfare, you have a few options: there are 8 outbound flights from Kansas City to Seattle/Tacoma Intl offered by 8 different airlines.
How popular is this Kansas City to Seattle flight route?
The Kansas City to Seattle/Tacoma Intl flight path was viewed by 84 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 4h 06m. Your travel time will be generally consistent. Kansas City and Seattle are separated by a distance of 1485 mi. Generally, flights for this route are nonstop.
What are the cheapest airlines flying from Kansas City to Seattle round-trip?
Currently priced at $111, Spirit Airlines will fly you from Kansas City to Seattle and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Hawaiian Airlines - these airlines can fly you to your destination from $118 and $138, respectively. Users have found that Spirit Airlines 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 $46. 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: KLM (100%), Qatar Airways (85%), Japan Airlines (85%).
What are the cheapest flights from Kansas City to Seattle?
While on average a flight from Kansas City to Seattle is generally $687, our data shows the cheapest flight currently is $127. When looking at the most popular route, (Kansas City - Seattle/Tacoma Intl), you can expect to pay $197 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, April is the cheapest month in which you can book a flight from Kansas City to Seattle (average of $121). Flying from Kansas City to Seattle in July is currently the most expensive (average of $248). 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

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Alternative routes for Kansas City to Seattle

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Other flights to Seattle

Top 8 airlines flying from Kansas City to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$111	Average$225	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$119	Average$234	FlexibilityNo cancel fee	On-time62%
Hawaiian Airlines	Cheapest$149	Average$373	FlexibilityNo cancel fee	On-time85%
Delta	Cheapest$159	Average$341	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$216	Average$314	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$237	Average$387	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$237	Average$386	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$256	Average$399	FlexibilityNo cancel fee	On-time71%

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$67+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kansas City to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Kansas City to Seattle/Tacoma Intl are usually found in April or November, booked 52 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Kansas City to Seattle

Cheapest flights from Kansas City to SeattleExplore 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 December 18, 2025.

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 December 18, 2025.

Find flight deals from Kansas City to Seattle

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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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 December.

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.

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

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Weekly flight availability from Kansas City to Seattle

The best insider tips for Kansas City to Seattle flights

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Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to Seattle trip

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Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Kansas City to Seattle, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

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

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What are the cheapest flights from Kansas City to Seattle?

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

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

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

Traveling to a place near Seattle?

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Alternative routes for Kansas City to Seattle

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Top 8 airlines flying from Kansas City to Seattle

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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 December 18, 2025.