$135+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
Jun 7 — Jun 141
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Knoxville 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.Cheap flight deals from Knoxville to Seattle
Cheapest
Best
Last-minute
One-way
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 May 8, 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 May 8, 2026.
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Sun 8/167:41 pm
SEA
- TYS
1 stop20h 55m
Frontier
Deal found 5/7![Frontier logo]()
$260
This Gotogate deal was found by Cheapflights users on 5/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Thu 8/277:41 pm
SEA
- TYS
1 stop20h 56m
Frontier
Deal found 5/7![Frontier logo]()
$274
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Thu 7/233:34 pm
SEA
- TYS
1 stop25h 02m
Frontier
Deal found 5/7![Frontier logo]()
$281
This Booking.com deal was found by Cheapflights users on 5/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Tue 7/217:41 pm
SEA
- TYS
1 stop20h 55m
Frontier
Deal found 5/7![Frontier logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/87:25 am
TYS
- SEA
2 stops29h 23m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Sun 6/77:00 am
TYS
- SEA
2 stops38h 35m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/87:25 am
TYS
- SEA
2 stops29h 23m
Multiple Airlines
Sat 6/137:41 pm
SEA
- TYS
1 stop15h 11m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:32 pm
TYS
- SEA
1 stop16h 16m
Multiple Airlines
Wed 9/97:00 am
SEA
- TYS
1 stop27h 44m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$357
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Sun 5/177:50 pm
SEA
- TYS
1 stop20h 43m
Frontier
Deal found 5/6![Frontier logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/88:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Frontier
Deal found 5/7![Frontier logo]()
$362
This Gotogate deal was found by Cheapflights users on 5/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/298:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Tue 8/47:41 pm
SEA
- TYS
1 stop20h 55m
Frontier
Deal found 5/7![Frontier logo]()
$365
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 May 8, 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 May 8, 2026.
This Southwest deal was found by Cheapflights users on 5/6. 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.
Mon 8/317:10 am
TYS
- SEA
1 stop9h 45m
Southwest
Thu 9/1011:05 pm
SEA
- TYS
2 stops9h 50m
Southwest
Deal found 5/6![Southwest logo]()
$462
This Delta deal was found by Cheapflights users on 5/3. 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 6/155:40 am
TYS
- SEA
1 stop7h 20m
Delta
Sun 6/285:30 am
SEA
- TYS
1 stop6h 26m
Delta
Deal found 5/3![Delta logo]()
$478
This United Airlines deal was found by Cheapflights users on 5/4. 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 9/16:30 am
TYS
- SEA
2 stops15h 37m
United Airlines
Fri 9/116:00 pm
SEA
- TYS
2 stops13h 36m
United Airlines
Deal found 5/4![United Airlines logo]()
$536
This Southwest deal was found by Cheapflights users on 5/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:55 pm
TYS
- SEA
2 stops12h 10m
Southwest
Wed 9/911:05 pm
SEA
- TYS
2 stops9h 50m
Southwest
Deal found 5/5![Southwest logo]()
$467
This Delta deal was found by Cheapflights users on 5/4. 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 7/611:55 am
TYS
- SEA
1 stop10h 09m
Delta
Sun 7/125:20 am
SEA
- TYS
1 stop6h 58m
Delta
Deal found 5/4![Delta logo]()
$478
This Southwest deal was found by Cheapflights users on 5/7. 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.
Thu 8/274:50 pm
TYS
- SEA
2 stops10h 30m
Southwest
Thu 9/1011:05 pm
SEA
- TYS
2 stops9h 50m
Southwest
Deal found 5/7![Southwest logo]()
$487
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Fri 5/295:45 am
TYS
- SEA
1 stop9h 06m
United Airlines
Tue 6/211:00 pm
SEA
- TYS
2 stops12h 27m
United Airlines
Deal found 5/7![United Airlines logo]()
$538
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Wed 7/225:45 am
TYS
- SEA
2 stops13h 24m
United Airlines
Mon 7/275:04 pm
SEA
- TYS
2 stops13h 39m
United Airlines
Deal found 5/6![United Airlines logo]()
$543
This Southwest deal was found by Cheapflights users on 5/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:55 pm
TYS
- SEA
2 stops8h 25m
Southwest
Tue 6/307:35 am
SEA
- TYS
2 stops9h 45m
Southwest
Deal found 5/5![Southwest logo]()
$547
This Southwest deal was found by Cheapflights users on 5/6. 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 7/267:00 pm
TYS
- SEA
2 stops9h 10m
Southwest
Thu 7/306:30 am
SEA
- TYS
2 stops11h 40m
Southwest
Deal found 5/6![Southwest logo]()
$577
This Southwest deal was found by Cheapflights users on 5/6. 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.
Wed 7/86:55 pm
TYS
- SEA
2 stops8h 25m
Southwest
Sat 7/185:30 am
SEA
- TYS
2 stops11h 05m
Southwest
Deal found 5/6![Southwest logo]()
$590
Last-minute flights from Knoxville to SeattleDiscover last-minute flight deals from Knoxville to Seattle. Data last updated May 8, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Seattle. Data last updated May 8, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:32 pm
TYS
- SEA
1 stop16h 17m
Frontier
Sun 5/177:50 pm
SEA
- TYS
1 stop20h 43m
Frontier
Deal found 5/6![Frontier logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:00 am
TYS
- SEA
2 stops54h 36m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Sun 6/77:00 am
TYS
- SEA
2 stops38h 35m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Sun 6/77:00 am
TYS
- SEA
2 stops38h 35m
Multiple Airlines
Sat 6/137:41 pm
SEA
- TYS
1 stop15h 11m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:00 am
TYS
- SEA
1 stop30h 06m
Multiple Airlines
Mon 6/153:33 pm
SEA
- TYS
2 stops21h 22m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/87:25 am
TYS
- SEA
2 stops29h 23m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/87:25 am
TYS
- SEA
2 stops29h 23m
Multiple Airlines
Sat 6/137:41 pm
SEA
- TYS
1 stop15h 11m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/88:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Frontier
Deal found 5/7![Frontier logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Tue 6/94:45 pm
TYS
- SEA
2 stops24h 33m
Multiple Airlines
Thu 6/117:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$370
This Gotogate deal was found by Cheapflights users on 5/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Tue 6/233:33 pm
SEA
- TYS
1 stop25h 04m
Frontier
Deal found 5/6![Frontier logo]()
$366
This American Airlines deal was found by Cheapflights users on 5/4. 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.
Tue 6/165:37 am
TYS
- SEA
1 stop8h 12m
American Airlines
Wed 6/245:10 am
SEA
- TYS
1 stop8h 33m
American Airlines
Deal found 5/4![American Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/234:45 pm
TYS
- SEA
2 stops44h 03m
Multiple Airlines
Tue 6/307:41 pm
SEA
- TYS
1 stop20h 56m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$382
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 May 8, 2026.
Search for one-way flight options from Knoxville to Seattle. Find affordable one-way fares based on user searches. Data last updated May 8, 2026.
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:32 pm
TYS
- SEA
1 stop16h 34m
Frontier
Deal found 5/7![Frontier logo]()
$135
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/298:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Deal found 5/6![Frontier logo]()
$155
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:32 pm
TYS
- SEA
1 stop16h 16m
Frontier
Deal found 5/6![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sun 8/162:51 pm
TYS
- SEA
2 stops46h 44m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:45 pm
TYS
- SEA
2 stops44h 50m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Mon 6/295:30 pm
TYS
- SEA
2 stops43h 18m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/57:25 am
TYS
- SEA
3 stops38h 40m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$190
This American Airlines deal was found by Cheapflights users on 5/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:33 pm
TYS
- SEA
1 stop10h 26m
American Airlines
Deal found 5/5![American Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Wed 5/272:20 pm
TYS
- SEA
2 stops55h 15m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$197
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 May 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $260 (Mytrip) |
One-way from | $135 (Mytrip) |
Popular in | December |
Cheapest in | August |
Average price | $564 |
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 May 8, 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
Mon 8/31
7:10 am-1:55 pm
1 stop9h 45m
Seattle/Tacoma Intl
Thu 9/10
11:05 pm-11:55 am
2 stops9h 50m
$462
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Wed 8/19
1:55 pm-11:05 pm
2 stops12h 10m
Seattle/Tacoma Intl
Wed 9/9
11:05 pm-11:55 am
2 stops9h 50m
$467
Quickest round-trip
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Mon 6/15
5:40 am-10:00 am
1 stop7h 20m
Seattle/Tacoma Intl
Sun 6/28
5:30 am-2:56 pm
1 stop6h 26m
$478
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Mon 7/6
11:55 am-7:04 pm
1 stop10h 09m
Seattle/Tacoma Intl
Sun 7/12
5:20 am-3:18 pm
1 stop6h 58m
$478
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Thu 8/27
4:50 pm-12:20 am
2 stops10h 30m
Seattle/Tacoma Intl
Thu 9/10
11:05 pm-11:55 am
2 stops9h 50m
$487
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 9/1
6:30 am-7:07 pm
2 stops15h 37m
Seattle/Tacoma Intl
Fri 9/11
6:00 pm-10:36 am
2 stops13h 36m
$536
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Fri 5/29
5:45 am-11:51 am
1 stop9h 06m
Seattle/Tacoma Intl
Tue 6/2
11:00 pm-2:27 pm
2 stops12h 27m
$538
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Wed 7/22
5:45 am-4:09 pm
2 stops13h 24m
Seattle/Tacoma Intl
Mon 7/27
5:04 pm-9:43 am
2 stops13h 39m
$543
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Tue 6/23
6:55 pm-12:20 am
2 stops8h 25m
Seattle/Tacoma Intl
Tue 6/30
7:35 am-8:20 pm
2 stops9h 45m
$547
KnoxvilleSeattle
TYS - SEA
TYSSEA
Knoxville McGhee Tyson
Sun 7/26
7:00 pm-1:10 am
2 stops9h 10m
Seattle/Tacoma Intl
Thu 7/30
6:30 am-9:10 pm
2 stops11h 40m
$577
Showing 1-10 of 23 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 May.
| 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?
The best time to book flights from Knoxville to Seattle is 84 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, August is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $436). Flying from Knoxville to Seattle in December is currently the most expensive (average of $778). 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.
How much does it cost to fly round-trip from Knoxville to Seattle?
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 May 8, 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.
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.9
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.9
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.9
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.9
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.9
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 locationsSeaTac
Tacoma
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Kirkland
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Knoxville
Popular flights
Seattle flight routes
Alternative routes for Knoxville to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Knoxville to Seattle by cabin class
Find flights from Knoxville to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Knoxville and Seattle flights
Browse other Knoxville and Seattle flight options. Last updated on May 8, 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 May 8, 2026.
Popular flight searches
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 May 8, 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 May 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$179 | Average$278 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$308 | Average$525 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$308 | Average$563 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$371 | Average$522 | FlexibilityNo cancel fee | On-time69% |