$136+ Cheap flights from Knoxville to Portland (TYS - PDX)
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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Aug 19 — Aug 261
Round-trip
1 adult, Economy
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Find cheap flights from Knoxville to Portland 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 Portland
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Best
Last-minute
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Cheapest flights from Knoxville to PortlandExplore the most affordable flight options available from Knoxville to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 20, 2026.
Explore the most affordable flight options available from Knoxville to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 9/107:00 am
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Thu 9/173:22 pm
PDX
- TYS
2 stops19h 05m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/137:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Thu 8/201:47 pm
PDX
- TYS
1 stop28h 59m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Sun 9/612:20 pm
PDX
- TYS
2 stops21h 07m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$338
This CheapOair deal was found by Cheapflights users on 7/19. 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 8/78:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Tue 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Deal found 7/19![Frontier logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/218:30 am
TYS
- PDX
2 stops35h 41m
Multiple Airlines
Wed 8/265:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$352
This United Airlines deal was found by Cheapflights users on 7/16. 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 9/51:00 pm
TYS
- PDX
1 stop10h 10m
United Airlines
Sat 9/127:02 am
PDX
- TYS
1 stop6h 56m
United Airlines
Deal found 7/16![United Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 7/16. 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 9/51:55 pm
TYS
- PDX
1 stop7h 30m
Southwest
Sat 9/126:50 am
PDX
- TYS
2 stops7h 50m
Southwest
Deal found 7/16![Southwest logo]()
$360
This Southwest deal was found by Cheapflights users on 7/16. 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 8/187:00 am
TYS
- PDX
2 stops11h 00m
Southwest
Tue 8/1811:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 7/16![Southwest logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 11/61:29 pm
TYS
- PDX
1 stop9h 39m
Multiple Airlines
Thu 11/129:03 pm
PDX
- TYS
1 stop22h 32m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/137:00 am
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Sun 9/203:22 pm
PDX
- TYS
2 stops25h 12m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$370
Best flights from Knoxville to PortlandDiscover carefully curated flight deals from Knoxville to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
Discover carefully curated flight deals from Knoxville to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
This American Airlines deal was found by Cheapflights users on 7/17. 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 9/51:53 pm
TYS
- PDX
1 stop8h 06m
American Airlines
Sat 9/126:00 am
PDX
- TYS
1 stop7h 42m
American Airlines
Deal found 7/17![American Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 7/16. 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 10/305:45 am
TYS
- PDX
1 stop7h 57m
Delta
Mon 11/211:39 am
PDX
- TYS
1 stop8h 33m
Delta
Deal found 7/16![Delta logo]()
$355
This Southwest deal was found by Cheapflights users on 7/16. 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 11/67:05 am
TYS
- PDX
2 stops9h 45m
Southwest
Thu 11/125:10 am
PDX
- TYS
2 stops10h 35m
Southwest
Deal found 7/16![Southwest logo]()
$417
This United Airlines deal was found by Cheapflights users on 7/15. 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 10/295:55 pm
TYS
- PDX
1 stop8h 17m
United Airlines
Mon 11/27:35 pm
PDX
- TYS
2 stops12h 14m
United Airlines
Deal found 7/15![United Airlines logo]()
$470
This Southwest deal was found by Cheapflights users on 7/18. 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 8/204:50 pm
TYS
- PDX
1 stop7h 25m
Southwest
Mon 8/2411:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 7/18![Southwest logo]()
$418
This Delta deal was found by Cheapflights users on 7/17. 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.
Sun 8/235:40 am
TYS
- PDX
1 stop7h 47m
Delta
Sat 8/296:45 am
PDX
- TYS
1 stop9h 26m
Delta
Deal found 7/17![Delta logo]()
$435
This Southwest deal was found by Cheapflights users on 7/19. 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 11/77:10 am
TYS
- PDX
2 stops10h 10m
Southwest
Tue 11/176:05 am
PDX
- TYS
2 stops10h 40m
Southwest
Deal found 7/19![Southwest logo]()
$423
This United Airlines deal was found by Cheapflights users on 7/17. 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 9/51:00 pm
TYS
- PDX
2 stops11h 05m
United Airlines
Sat 9/127:02 am
PDX
- TYS
2 stops10h 22m
United Airlines
Deal found 7/17![United Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/15. 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 10/35:25 pm
TYS
- PDX
1 stop7h 00m
Southwest
Sun 10/115:30 am
PDX
- TYS
1 stop7h 05m
Southwest
Deal found 7/15![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 7/18. 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 8/125:30 pm
TYS
- PDX
2 stops8h 40m
Southwest
Sun 8/1611:30 pm
PDX
- TYS
2 stops9h 50m
Southwest
Deal found 7/18![Southwest logo]()
$475
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated July 20, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated July 20, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 7/19. 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 8/78:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Tue 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Deal found 7/19![Frontier logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/137:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Thu 8/201:47 pm
PDX
- TYS
1 stop28h 59m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/167:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Sun 8/231:47 pm
PDX
- TYS
1 stop28h 59m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$375
This Southwest deal was found by Cheapflights users on 7/16. 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 8/183:00 pm
TYS
- PDX
1 stop10h 15m
Southwest
Tue 8/1811:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 7/16![Southwest logo]()
$366
This American Airlines deal was found by Cheapflights users on 7/16. 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 8/186:03 am
TYS
- PDX
1 stop7h 51m
American Airlines
Tue 8/1811:34 pm
PDX
- TYS
1 stop8h 36m
American Airlines
Deal found 7/16![American Airlines logo]()
$383
This American Airlines deal was found by Cheapflights users on 7/15. 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.
Thu 8/201:56 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Thu 8/275:18 am
PDX
- TYS
1 stop8h 25m
American Airlines
Deal found 7/15![American Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/218:30 am
TYS
- PDX
2 stops35h 41m
Multiple Airlines
Wed 8/265:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Sun 9/612:20 pm
PDX
- TYS
2 stops21h 07m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$338
One-way flights from Knoxville to PortlandSearch for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 9/277:00 am
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 7/18. 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
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/137:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$166
This Southwest deal was found by Cheapflights users on 7/16. 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 8/134:50 pm
TYS
- PDX
2 stops9h 25m
Southwest
Deal found 7/16![Southwest logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/258:00 am
TYS
- PDX
2 stops35h 35m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/2812:22 pm
TYS
- PDX
3 stops53h 05m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$202
This Delta deal was found by Cheapflights users on 7/18. 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 9/285:28 pm
TYS
- PDX
1 stop7h 32m
Delta
Deal found 7/18![Delta logo]()
$207
This United Airlines deal was found by Cheapflights users on 7/18. 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 9/2610:42 am
TYS
- PDX
2 stops10h 04m
United Airlines
Deal found 7/18![United Airlines logo]()
$212
Find flight deals from Knoxville to Portland
Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Portland (PDX). 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 July 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $334 (Kiwi.com) |
One-way from | $136 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $553 |
Cheapflights Fare Finder
Customize your flight search to find flights from Knoxville to Portland 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 July 20, 2026.
Use the filters below to find and compare flights from Knoxville to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 9/5
1:53 pm-6:59 pm
1 stop8h 06m
Portland
Sat 9/12
6:00 am-4:42 pm
1 stop7h 42m
$355
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 10/30
5:45 am-10:42 am
1 stop7h 57m
Portland
Mon 11/2
11:39 am-11:12 pm
1 stop8h 33m
$355
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 11/6
7:05 am-1:50 pm
2 stops9h 45m
Portland
Thu 11/12
5:10 am-6:45 pm
2 stops10h 35m
$417
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 8/20
4:50 pm-9:15 pm
1 stop7h 25m
Portland
Mon 8/24
11:30 pm-12:05 pm
2 stops9h 35m
$418
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 11/7
7:10 am-2:20 pm
2 stops10h 10m
Portland
Tue 11/17
6:05 am-7:45 pm
2 stops10h 40m
$423
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sun 8/23
5:40 am-10:27 am
1 stop7h 47m
Portland
Sat 8/29
6:45 am-7:11 pm
1 stop9h 26m
$435
Quickest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 10/3
5:25 pm-9:25 pm
1 stop7h 00m
Portland
Sun 10/11
5:30 am-3:35 pm
1 stop7h 05m
$467
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 10/29
5:55 pm-11:12 pm
1 stop8h 17m
Portland
Mon 11/2
7:35 pm-10:49 am
2 stops12h 14m
$470
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 9/5
1:00 pm-9:05 pm
2 stops11h 05m
Portland
Sat 9/12
7:02 am-8:24 pm
2 stops10h 22m
$475
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Wed 8/12
5:30 pm-11:10 pm
2 stops8h 40m
Portland
Sun 8/16
11:30 pm-12:20 pm
2 stops9h 50m
$475
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Knoxville to Portland
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 Portland in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Knoxville-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Portland flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-Portland 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-Portland 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 Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from Knoxville with our price prediction graph.
TYS-PDX
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 Portland
How far ahead should I book a flight from Knoxville to Portland?
Booking 41 days in advance of your planned departure date is, on average, the best time to get cheap flights from Knoxville to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Knoxville to Portland?
Currently, February is the cheapest month in which you can book a flight from Knoxville to Portland (average of $401). Flying from Knoxville to Portland in December is currently the most expensive (average of $625). 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 Portland?
Reviews of airlines servicing Portland
Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated July 20, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from Knoxville to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
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 Portland. 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 Portland?
Book flights to Portland if you plan to visit one of these locationsBeaverton
Seaside
Lincoln City
Vancouver
Longview
Lake Oswego
Hillsboro
Kelso
Clackamas
Troutdale
Cannon Beach
Long Beach
McMinnville
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Gresham
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Knoxville and Portland flights
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Top 3 airlines flying from Knoxville to Portland
Discover the top 3 airlines that operate flights from Knoxville to Portland. 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 July 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$279 | Average$486 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$536 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$354 | Average$594 | FlexibilityNo cancel fee | On-timeN/A |