$131+ Cheap flights from Knoxville to Seattle (TYS - 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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Cheapest flights from Knoxville to SeattleExplore the most affordable flight options available from Knoxville to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.
Explore the most affordable flight options available from Knoxville to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/34:20 pm
TYS
- SEA
1 stop22h 17m
Multiple Airlines
Sat 4/1112:42 pm
SEA
- TYS
2 stops30h 51m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$276
This CheapOair deal was found by Cheapflights users on 3/7. 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.
Fri 5/228:08 pm
TYS
- SEA
1 stop26h 51m
Frontier
Tue 5/269:14 pm
SEA
- TYS
1 stop18h 59m
Frontier
Deal found 3/7![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Mon 6/18:08 pm
TYS
- SEA
1 stop17h 02m
Multiple Airlines
Wed 6/311:25 am
SEA
- TYS
1 stop23h 27m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
TYS
- SEA
1 stop26h 51m
Multiple Airlines
Wed 8/199:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$316
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Fri 5/228:08 pm
TYS
- SEA
1 stop26h 51m
Frontier
Sun 5/319:14 pm
SEA
- TYS
1 stop18h 59m
Frontier
Deal found 3/8![Frontier logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
TYS
- SEA
1 stop26h 51m
Multiple Airlines
Sat 8/229:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/34:20 pm
TYS
- SEA
1 stop22h 17m
Multiple Airlines
Thu 4/912:42 pm
SEA
- TYS
2 stops30h 06m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 8/178:08 pm
TYS
- SEA
1 stop17h 02m
Multiple Airlines
Wed 8/269:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:29 pm
TYS
- SEA
2 stops24h 10m
Multiple Airlines
Wed 8/199:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
TYS
- SEA
1 stop26h 51m
Frontier
Sun 8/239:14 pm
SEA
- TYS
1 stop18h 59m
Frontier
Deal found 3/7![Frontier logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 8/178:08 pm
TYS
- SEA
1 stop17h 02m
Multiple Airlines
Sat 8/299:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:29 pm
TYS
- SEA
2 stops24h 10m
Multiple Airlines
Sat 8/229:14 pm
SEA
- TYS
1 stop13h 35m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$340
Best flights from Knoxville to SeattleDiscover carefully curated flight deals from Knoxville to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
Discover carefully curated flight deals from Knoxville to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:30 pm
TYS
- SEA
1 stop7h 36m
United Airlines
Wed 4/1510:48 am
SEA
- TYS
1 stop9h 20m
United Airlines
Deal found 3/9![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 3/9. 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.
Tue 9/88:00 am
TYS
- SEA
1 stop8h 00m
Southwest
Mon 9/1411:05 pm
SEA
- TYS
2 stops10h 00m
Southwest
Deal found 3/9![Southwest logo]()
$472
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:09 pm
TYS
- SEA
1 stop8h 32m
Alaska Airlines
Tue 4/2810:57 pm
SEA
- TYS
1 stop8h 29m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$473
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:57 pm
TYS
- SEA
1 stop9h 02m
United Airlines
Wed 8/57:00 am
SEA
- TYS
1 stop7h 12m
United Airlines
Deal found 3/8![United Airlines logo]()
$405
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:09 pm
TYS
- SEA
1 stop10h 06m
Alaska Airlines
Sat 5/210:57 pm
SEA
- TYS
1 stop8h 29m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$473
This Southwest deal was found by Cheapflights users on 3/11. 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.
Mon 8/107:10 am
TYS
- SEA
1 stop9h 45m
Southwest
Sat 8/1511:05 pm
SEA
- TYS
2 stops10h 20m
Southwest
Deal found 3/11![Southwest logo]()
$514
This United Airlines deal was found by Cheapflights users on 3/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:30 pm
TYS
- SEA
1 stop9h 26m
United Airlines
Sat 5/210:52 am
SEA
- TYS
1 stop6h 53m
United Airlines
Deal found 3/10![United Airlines logo]()
$476
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2510:49 am
TYS
- SEA
2 stops13h 08m
United Airlines
Sat 5/25:05 am
SEA
- TYS
2 stops8h 49m
United Airlines
Deal found 3/11![United Airlines logo]()
$503
Last-minute flights from Knoxville to SeattleDiscover last-minute flight deals from Knoxville to Seattle. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Seattle. Data last updated March 13, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 3/11. 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.
Tue 3/312:25 pm
TYS
- SEA
2 stops12h 55m
Southwest
Wed 4/15:30 am
SEA
- TYS
2 stops11h 35m
Southwest
Deal found 3/11![Southwest logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/34:20 pm
TYS
- SEA
1 stop22h 17m
Multiple Airlines
Sat 4/1112:42 pm
SEA
- TYS
2 stops30h 51m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/34:20 pm
TYS
- SEA
1 stop22h 17m
Multiple Airlines
Thu 4/912:42 pm
SEA
- TYS
2 stops30h 06m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/34:20 pm
TYS
- SEA
1 stop22h 17m
Frontier
Thu 4/912:42 pm
SEA
- TYS
1 stop23h 46m
Frontier
Deal found 3/11![Frontier logo]()
$356
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:24 pm
TYS
- SEA
1 stop7h 51m
Delta
Tue 4/1411:14 pm
SEA
- TYS
1 stop8h 07m
Delta
Deal found 3/11![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:00 am
TYS
- SEA
1 stop7h 48m
United Airlines
Tue 4/148:45 am
SEA
- TYS
2 stops10h 44m
United Airlines
Deal found 3/11![United Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/82:25 pm
TYS
- SEA
2 stops11h 17m
United Airlines
Wed 4/1511:59 pm
SEA
- TYS
1 stop7h 09m
United Airlines
Deal found 3/11![United Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/97:00 am
TYS
- SEA
1 stop7h 48m
United Airlines
Thu 4/1611:59 pm
SEA
- TYS
1 stop7h 09m
United Airlines
Deal found 3/12![United Airlines logo]()
$392
This American Airlines deal was found by Cheapflights users on 3/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:20 pm
TYS
- SEA
1 stop9h 16m
American Airlines
Sat 5/26:00 am
SEA
- TYS
1 stop9h 04m
American Airlines
Deal found 3/9![American Airlines logo]()
$373
This United Airlines deal was found by Cheapflights users on 3/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:49 am
TYS
- SEA
2 stops10h 46m
United Airlines
Mon 5/47:00 am
SEA
- TYS
1 stop6h 54m
United Airlines
Deal found 3/7![United Airlines logo]()
$378
This American Airlines deal was found by Cheapflights users on 3/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:20 pm
TYS
- SEA
1 stop9h 16m
American Airlines
Wed 4/2912:59 am
SEA
- TYS
1 stop8h 31m
American Airlines
Deal found 3/10![American Airlines logo]()
$386
One-way flights from Knoxville to SeattleSearch for one-way flight options from Knoxville to Seattle. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
Search for one-way flight options from Knoxville to Seattle. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Mon 8/318:08 pm
TYS
- SEA
1 stop17h 02m
Frontier
Deal found 3/8![Frontier logo]()
$131
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Mon 6/88:08 pm
TYS
- SEA
1 stop17h 02m
Frontier
Deal found 3/8![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Fri 5/151:15 pm
TYS
- SEA
2 stops23h 12m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$175
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:30 pm
TYS
- SEA
1 stop7h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Mon 6/87:27 pm
TYS
- SEA
2 stops47h 12m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/18:30 am
TYS
- SEA
2 stops30h 07m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Fri 4/104:20 pm
TYS
- SEA
1 stop22h 17m
Frontier
Deal found 3/12![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 7/27:00 am
TYS
- SEA
1 stop30h 10m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$203
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:01 pm
TYS
- SEA
1 stop7h 46m
United Airlines
Deal found 3/8![United Airlines logo]()
$214
Find flight deals from Knoxville to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) 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 March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $276 (Kiwi.com) |
One-way from | $131 (CheapOair) |
Popular in | December |
Cheapest in | August |
Average price | $586 |
Cheapflights Fare Finder
Customize your flight search to find flights from Knoxville 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 March 13, 2026.
Use the filters below to find and compare flights from Knoxville to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Wed 4/8
4:30 pm-9:06 pm
1 stop7h 36m
Seattle/Tacoma Intl
Wed 4/15
10:48 am-11:08 pm
1 stop9h 20m
$359
Quickest round-trip
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 6/2
5:57 pm-11:59 pm
1 stop9h 02m
Seattle/Tacoma Intl
Wed 8/5
7:00 am-5:12 pm
1 stop7h 12m
$405
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 9/8
8:00 am-1:00 pm
1 stop8h 00m
Seattle/Tacoma Intl
Mon 9/14
11:05 pm-12:05 pm
2 stops10h 00m
$472
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 4/21
4:09 pm-9:41 pm
1 stop8h 32m
Seattle/Tacoma Intl
Tue 4/28
10:57 pm-10:26 am
1 stop8h 29m
$473
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Wed 4/29
4:09 pm-11:15 pm
1 stop10h 06m
Seattle/Tacoma Intl
Sat 5/2
10:57 pm-10:26 am
1 stop8h 29m
$473
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Wed 4/29
4:30 pm-10:56 pm
1 stop9h 26m
Seattle/Tacoma Intl
Sat 5/2
10:52 am-8:45 pm
1 stop6h 53m
$476
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Sat 4/25
10:49 am-8:57 pm
2 stops13h 08m
Seattle/Tacoma Intl
Sat 5/2
5:05 am-4:54 pm
2 stops8h 49m
$503
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Mon 8/10
7:10 am-1:55 pm
1 stop9h 45m
Seattle/Tacoma Intl
Sat 8/15
11:05 pm-12:25 pm
2 stops10h 20m
$514
Cheapest one-way
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 4/7
4:30 pm-9:06 pm
1 stop7h 36m
$180
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Fri 5/15
6:01 pm-10:47 pm
1 stop7h 46m
$214
Showing 1-10 of 18 resultsSorted by cheapest first
Compare providers for flights from Knoxville 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 Knoxville to Seattle in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Knoxville-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-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 Knoxville-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 Knoxville to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Knoxville with our price prediction graph.
TYS-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 Knoxville to Seattle
How far ahead should I book a flight from Knoxville to Seattle?
Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Seattle. Price data was last updated on March 6, 2026.
The best time to book flights from Knoxville to Seattle is 85 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Knoxville to Seattle?
Currently, April is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $198). Flying from Knoxville to Seattle in December is currently the most expensive (average of $318). 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.
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 March 13, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican Airlines from Knoxville to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.9
Food
7.2
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.9
Food
7.2
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.9
Food
7.2
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.9
Food
7.2
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.9
Food
7.2
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Knoxville 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 locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
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Knoxville and Seattle flights
Browse other Knoxville and Seattle flight options. Last updated on March 13, 2026.
Other flights from Knoxville
Browse through other flights departing from Knoxville. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
Top 4 airlines flying from Knoxville to Seattle
Discover the top 4 airlines that operate flights from Knoxville 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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$179 | Average$278 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$308 | Average$548 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$318 | Average$566 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$371 | Average$523 | FlexibilityNo cancel fee | On-time69% |