$85+ Cheap flights from Kansas City to Seattle (MCI - SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — SEA
Oct 10 — Oct 171
Round-trip
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
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
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 Saturday and return on a Tuesday
Cheap flight deals from Kansas City to Seattle
Cheapest
Best
Last-minute
One-way
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 September 10, 2026.
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 September 10, 2026.
This CheapOair deal was found by Cheapflights users on 9/9. 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.
Fri 10/28:32 pm -
1 stop20h 36m
Mon 10/54:27 pm -
1 stop25h 10m
Deal found 9/9![Frontier logo]()
$308
This CheapOair deal was found by Cheapflights users on 9/9. 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.
Tue 10/68:32 pm -
1 stop20h 36m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/9![Frontier logo]()
$309
This CheapOair deal was found by Cheapflights users on 9/9. 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.
Mon 9/2810:30 pm -
1 stop13h 12m
Sat 10/34:27 pm -
1 stop25h 10m
Deal found 9/9![Frontier logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/221:37 pm -
1 stop22h 11m
Mon 10/268:00 pm -
2 stops21h 47m
Deal found 9/9![Frontier logo]()
$314
This CheapOair deal was found by Cheapflights users on 9/8. 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.
Sat 9/268:32 pm -
1 stop20h 36m
Mon 10/54:27 pm -
1 stop25h 10m
Deal found 9/8![Frontier logo]()
$315
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:30 pm -
1 stop13h 12m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/9![Frontier logo]()
$317
This CheapOair deal was found by Cheapflights users on 9/7. 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 10/78:32 pm -
1 stop20h 40m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/7![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 10/138:43 pm -
1 stop20h 29m
Fri 10/304:27 pm -
1 stop25h 20m
Deal found 9/6![Frontier logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:53 pm -
1 stop7h 42m
Sun 10/116:27 pm -
Nonstop3h 32m
Deal found 9/6![Alaska Airlines logo]()
$322
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:20 am -
2 stops14h 50m
Sat 10/1712:10 am -
1 stop7h 00m
Deal found 9/6![Southwest logo]()
$323
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:30 pm -
1 stop13h 12m
Thu 10/159:16 pm -
1 stop12h 42m
Deal found 9/10![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/213:17 pm -
Nonstop4h 03m
Fri 10/234:27 pm -
1 stop25h 21m
Deal found 9/9![Multiple Airlines logo]()
$326
Best flights from Kansas City to SeattleDiscover 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 September 10, 2026.
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 September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/7. 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.
Wed 10/77:00 pm -
1 stop6h 55m
Sat 10/1012:10 am -
1 stop7h 00m
Deal found 9/7![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 9/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:11 pm -
1 stop5h 48m
Mon 10/194:35 pm -
2 stops14h 32m
Deal found 9/5![United Airlines logo]()
$352
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:36 pm -
1 stop9h 27m
Tue 10/275:55 pm -
Nonstop3h 36m
Deal found 9/10![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:20 am -
2 stops14h 50m
Thu 10/158:40 pm -
1 stop12h 40m
Deal found 9/6![Southwest logo]()
$328
This Southwest deal was found by Cheapflights users on 9/6. 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.
Sun 10/46:35 am -
2 stops9h 55m
Sat 10/1012:10 am -
1 stop7h 00m
Deal found 9/6![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 9/6. 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.
Mon 9/217:24 am -
Nonstop3h 51m
Wed 10/75:55 pm -
Nonstop3h 36m
Deal found 9/6![Delta logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:27 am -
1 stop9h 36m
Mon 11/212:20 pm -
2 stops9h 32m
Deal found 9/6![United Airlines logo]()
$452
This Southwest deal was found by Cheapflights users on 9/9. 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 10/193:35 pm -
2 stops11h 05m
Sat 10/247:50 am -
1 stop9h 10m
Deal found 9/9![Southwest logo]()
$403
This Delta deal was found by Cheapflights users on 9/6. 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.
Thu 10/227:00 am -
Nonstop4h 04m
Mon 10/2611:59 pm -
1 stop7h 30m
Deal found 9/6![Delta logo]()
$447
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:00 am -
2 stops11h 00m
Mon 11/169:25 am -
1 stop5h 10m
Deal found 9/10![Southwest logo]()
$422
This Southwest deal was found by Cheapflights users on 9/9. 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.
Fri 11/611:40 am -
2 stops10h 25m
Wed 11/1111:05 am -
2 stops8h 55m
Deal found 9/9![Southwest logo]()
$426
This Southwest deal was found by Cheapflights users on 9/9. 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 10/223:35 pm -
2 stops11h 05m
Sat 10/316:15 am -
2 stops8h 15m
Deal found 9/9![Southwest logo]()
$426
Last-minute flights from Kansas City to SeattleDiscover last-minute flight deals from Kansas City to Seattle. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Kansas City to Seattle. Data last updated September 10, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:30 pm -
1 stop13h 12m
Thu 10/159:16 pm -
1 stop12h 42m
Deal found 9/10![Frontier logo]()
$324
This CheapOair deal was found by Cheapflights users on 9/8. 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.
Sat 9/268:32 pm -
1 stop20h 36m
Mon 10/54:27 pm -
1 stop25h 10m
Deal found 9/8![Frontier logo]()
$315
This CheapOair deal was found by Cheapflights users on 9/9. 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.
Mon 9/2810:30 pm -
1 stop13h 12m
Sat 10/34:27 pm -
1 stop25h 10m
Deal found 9/9![Frontier logo]()
$313
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:30 pm -
1 stop13h 12m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/9![Frontier logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:53 pm -
1 stop7h 42m
Sun 10/116:27 pm -
Nonstop3h 32m
Deal found 9/6![Alaska Airlines logo]()
$322
This CheapOair deal was found by Cheapflights users on 9/9. 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.
Tue 10/68:32 pm -
1 stop20h 36m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/9![Frontier logo]()
$309
This CheapOair deal was found by Cheapflights users on 9/7. 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 10/78:32 pm -
1 stop20h 40m
Sun 10/119:16 pm -
1 stop12h 42m
Deal found 9/7![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 10/138:43 pm -
1 stop20h 29m
Fri 10/304:27 pm -
1 stop25h 20m
Deal found 9/6![Frontier logo]()
$320
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:20 am -
2 stops14h 50m
Sat 10/1712:10 am -
1 stop7h 00m
Deal found 9/6![Southwest logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/213:17 pm -
Nonstop4h 03m
Fri 10/234:27 pm -
1 stop25h 21m
Deal found 9/9![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/221:37 pm -
1 stop22h 11m
Mon 10/268:00 pm -
2 stops21h 47m
Deal found 9/9![Frontier logo]()
$314
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Thu 10/298:43 pm -
1 stop20h 29m
Mon 11/24:27 pm -
1 stop25h 20m
Deal found 9/10![Frontier logo]()
$308
One-way flights from Kansas City to SeattleSearch for one-way flight options from Kansas City to Seattle. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Kansas City to Seattle. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$85
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Tue 11/38:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$86
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Wed 10/218:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$91
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Thu 10/298:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/58:32 pm -
1 stop20h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$93
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$96
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Fri 10/238:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 11/128:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$98
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $308 (CheapOair) |
One-way from | $85 (Expedia) |
Popular in | July |
Cheapest in | February |
Average price | $400 |
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 7,457,451 searches. Data last updated September 10, 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
Cheapest round-trip
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Wed 12/9
11:40 am-6:40 pm
2 stops9h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$134
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Tue 12/8
7:00 am-9:04 am
Nonstop4h 04m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Wed 11/18
7:00 am-9:11 am
Nonstop4h 11m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Sat 11/7
7:00 am-9:09 am
Nonstop4h 09m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Sun 10/25
7:00 am-9:04 am
Nonstop4h 04m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Wed 11/4
7:00 am-9:09 am
Nonstop4h 09m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Fri 11/6
7:00 am-9:04 am
Nonstop4h 04m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Quickest round-trip
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Sun 10/25
6:17 am-8:20 am
Nonstop4h 03m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Tue 10/6
7:00 am-9:04 am
Nonstop4h 04m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Wed 10/7
6:17 am-8:20 am
Nonstop4h 03m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
Showing 1-10 of 24 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
MCI-SEA
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 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 $496). 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 September 10, 2026.
It’s optimal to fly from Kansas City to Seattle in the evening. By choosing this option you can save up to 15% 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 September 5, 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. Tuesday afternoons 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
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
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 September 10, 2026.
Read through reviews of airlines operating flights from Kansas City to Seattle, such as Southwest,Alaska Airlines, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
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Kansas City and Seattle flights
Browse other Kansas City and Seattle flight options. Last updated on September 10, 2026.
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Top 6 airlines flying from Kansas City to Seattle
Discover the top 6 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$152 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$388 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$183 | Average$321 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$198 | Average$421 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$216 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$347 | Average$527 | FlexibilityNo cancel fee | On-time71% |