$169+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
Sep 26 — Oct 31
Round-trip
1 adult, Economy
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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
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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 August 27, 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 August 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 11/126:30 am -
2 stops15h 24m
Sat 11/144:27 pm -
1 stop17h 52m
Deal found 8/25![Multiple Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 8/26. 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.
Wed 10/144:11 pm -
1 stop8h 52m
Thu 10/226:00 am -
1 stop9h 24m
Deal found 8/26![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 8/22. 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 9/151:55 pm -
2 stops12h 15m
Sat 9/2611:00 pm -
1 stop8h 55m
Deal found 8/22![Southwest logo]()
$342
This Southwest deal was found by Cheapflights users on 8/24. 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 9/221:55 pm -
2 stops12h 15m
Tue 9/295:20 am -
2 stops10h 40m
Deal found 8/24![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 8/24. 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.
Fri 10/912:06 pm -
1 stop9h 58m
Tue 10/136:00 am -
1 stop9h 24m
Deal found 8/24![Delta logo]()
$360
This American Airlines deal was found by Cheapflights users on 8/26. 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 11/252:54 pm -
1 stop10h 29m
Tue 12/16:09 am -
1 stop6h 53m
Deal found 8/26![American Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 8/24. 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 10/295:30 pm -
2 stops11h 05m
Fri 11/69:25 pm -
2 stops13h 45m
Deal found 8/24![Southwest logo]()
$376
This United Airlines deal was found by Cheapflights users on 8/26. 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 9/184:50 pm -
1 stop9h 14m
Sat 9/1911:59 pm -
1 stop8h 35m
Deal found 8/26![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 8/26. 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 10/144:20 pm -
1 stop9h 20m
Mon 10/1912:10 am -
2 stops9h 10m
Deal found 8/26![Southwest logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 9/247:00 am -
1 stop11h 08m
Thu 10/19:45 pm -
1 stop20h 29m
Deal found 8/25![Multiple Airlines logo]()
$381
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 August 27, 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 August 27, 2026.
This Southwest deal was found by Cheapflights users on 8/23. 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 9/233:00 pm -
1 stop11h 10m
Tue 9/295:20 am -
2 stops10h 40m
Deal found 8/23![Southwest logo]()
$348
This United Airlines deal was found by Cheapflights users on 8/22. 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 9/96:00 pm -
1 stop7h 45m
Sat 9/128:10 am -
1 stop9h 14m
Deal found 8/22![United Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 8/26. 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 9/235:30 pm -
2 stops9h 10m
Sun 9/275:15 am -
1 stop9h 00m
Deal found 8/26![Southwest logo]()
$407
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/109:45 am -
1 stop9h 01m
Fri 9/1811:04 pm -
1 stop8h 33m
Deal found 8/24![United Airlines logo]()
$445
This Southwest deal was found by Cheapflights users on 8/25. 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 9/163:00 pm -
1 stop11h 10m
Sun 9/2011:05 pm -
2 stops10h 15m
Deal found 8/25![Southwest logo]()
$443
This United Airlines deal was found by Cheapflights users on 8/26. 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 10/2711:59 am -
1 stop10h 18m
Sat 10/318:09 am -
1 stop8h 27m
Deal found 8/26![United Airlines logo]()
$447
This Southwest deal was found by Cheapflights users on 8/22. 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 9/163:00 pm -
2 stops11h 30m
Sat 9/196:50 am -
2 stops7h 55m
Deal found 8/22![Southwest logo]()
$452
This United Airlines deal was found by Cheapflights users on 8/26. 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 10/1410:42 am -
1 stop8h 23m
Thu 10/226:43 pm -
2 stops12h 02m
Deal found 8/26![United Airlines logo]()
$452
This Southwest deal was found by Cheapflights users on 8/22. 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 9/91:55 pm -
2 stops12h 15m
Sat 9/121:10 pm -
2 stops20h 15m
Deal found 8/22![Southwest logo]()
$457
This United Airlines deal was found by Cheapflights users on 8/27. 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 10/149:45 am -
2 stops12h 07m
Mon 11/27:35 pm -
2 stops11h 18m
Deal found 8/27![United Airlines logo]()
$458
Last-minute flights from Knoxville to SeattleDiscover last-minute flight deals from Knoxville to Seattle. Data last updated August 27, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Seattle. Data last updated August 27, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/25. 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 9/51:16 pm -
1 stop10h 36m
Wed 9/3010:59 am -
1 stop8h 43m
Deal found 8/25![American Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 8/22. 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 9/151:55 pm -
2 stops12h 15m
Sat 9/2611:00 pm -
1 stop8h 55m
Deal found 8/22![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 8/26. 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 9/184:50 pm -
1 stop9h 14m
Sat 9/1911:59 pm -
1 stop8h 35m
Deal found 8/26![United Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/26. 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 9/199:00 am -
2 stops10h 14m
Tue 9/221:57 pm -
1 stop7h 26m
Deal found 8/26![United Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 8/26. 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.
Sat 9/196:50 am -
2 stops14h 30m
Tue 9/2211:00 pm -
1 stop10h 05m
Deal found 8/26![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 8/24. 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 9/217:25 pm -
1 stop7h 33m
Mon 9/2811:05 pm -
1 stop8h 13m
Deal found 8/24![Delta logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 9/216:30 am -
1 stop30h 12m
Mon 9/289:45 pm -
2 stops37h 57m
Deal found 8/24![Multiple Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 8/26. 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 9/227:30 am -
1 stop10h 21m
Tue 9/296:18 am -
1 stop6h 53m
Deal found 8/26![American Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 8/24. 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 9/221:55 pm -
2 stops12h 15m
Tue 9/295:20 am -
2 stops10h 40m
Deal found 8/24![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 9/247:00 am -
1 stop11h 08m
Thu 10/19:45 pm -
1 stop20h 29m
Deal found 8/25![Multiple Airlines logo]()
$381
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 August 27, 2026.
Search for one-way flight options from Knoxville to Seattle. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/154:50 pm -
1 stop7h 41m
Deal found 8/25![United Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 9/216:30 am -
2 stops39h 06m
Deal found 8/23![Multiple Airlines logo]()
$172
This Southwest deal was found by Cheapflights users on 8/25. 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 9/151:55 pm -
2 stops12h 15m
Deal found 8/25![Southwest logo]()
$174
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Mon 9/143:40 pm -
1 stop8h 56m
Deal found 8/23![United Airlines logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 9/148:00 am -
2 stops34h 08m
Deal found 8/23![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 10/96:55 pm -
2 stops41h 03m
Deal found 8/24![Multiple Airlines logo]()
$191
This Delta deal was found by Cheapflights users on 8/25. 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.
Fri 9/184:57 pm -
1 stop10h 01m
Deal found 8/25![Delta logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 9/168:30 am -
2 stops33h 38m
Deal found 8/25![Multiple Airlines logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 10/212:57 pm -
2 stops47h 45m
Deal found 8/24![Multiple Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 9/1510:29 am -
2 stops50h 13m
Deal found 8/26![Multiple Airlines logo]()
$198
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 August 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $286 (Kiwi.com) |
One-way from | $169 (United Airlines) |
Popular in | December |
Cheapest in | November |
Average price | $563 |
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 7,457,451 searches. Data last updated August 27, 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 Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/23
3:00 pm-11:10 pm
1 stop11h 10m
Seattle/Tacoma Intl
Tue 9/29
5:20 am-7:00 pm
2 stops10h 40m
$348
Quickest round-trip
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/9
6:00 pm-10:45 pm
1 stop7h 45m
Seattle/Tacoma Intl
Sat 9/12
8:10 am-8:24 pm
1 stop9h 14m
$397
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/23
5:30 pm-11:40 pm
2 stops9h 10m
Seattle/Tacoma Intl
Sun 9/27
5:15 am-5:15 pm
1 stop9h 00m
$407
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/16
3:00 pm-11:10 pm
1 stop11h 10m
Seattle/Tacoma Intl
Sun 9/20
11:05 pm-12:20 pm
2 stops10h 15m
$443
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Thu 9/10
9:45 am-3:46 pm
1 stop9h 01m
Seattle/Tacoma Intl
Fri 9/18
11:04 pm-10:37 am
1 stop8h 33m
$445
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Tue 10/27
11:59 am-7:17 pm
1 stop10h 18m
Seattle/Tacoma Intl
Sat 10/31
8:09 am-7:36 pm
1 stop8h 27m
$447
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/16
3:00 pm-11:30 pm
2 stops11h 30m
Seattle/Tacoma Intl
Sat 9/19
6:50 am-5:45 pm
2 stops7h 55m
$452
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 10/14
10:42 am-4:05 pm
1 stop8h 23m
Seattle/Tacoma Intl
Thu 10/22
6:43 pm-9:45 am
2 stops12h 02m
$452
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 9/9
1:55 pm-11:10 pm
2 stops12h 15m
Seattle/Tacoma Intl
Sat 9/12
1:10 pm-12:25 pm
2 stops20h 15m
$457
KnoxvilleSeattle
TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl
TYSSEA
Knoxville McGhee Tyson
Wed 10/14
9:45 am-6:52 pm
2 stops12h 07m
Seattle/Tacoma Intl
Mon 11/2
7:35 pm-9:53 am
2 stops11h 18m
$458
Showing 1-10 of 20 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 August.
| 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 73 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, November 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 $774). 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?
Airfare is below average for this route at the moment.
Knoxville to Seattle flights typically cost between $405 and $596 in November.The cheapest round-trip price found within the last 5 days was $286 on Multiple Airlines (Nov 12-Nov 14).
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 August 27, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta 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.
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
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.
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Tacoma
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Knoxville and Seattle flights
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Top 5 airlines flying from Knoxville to Seattle
Discover the top 5 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 7,457,451 searches. Data last updated August 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$358 | Average$533 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$372 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$386 | Average$582 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$386 | Average$566 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$603 | Average$848 | FlexibilityNo cancel fee | On-time75% |