$198+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Jul 13 — Jul 201
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
One-way
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 June 13, 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 June 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Sun 9/277:00 am
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Sat 10/33:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sun 9/277:00 am
TYS
- PDX
1 stop12h 35m
Multiple Airlines
Wed 10/73:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$282
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:45 am
TYS
- PDX
1 stop7h 48m
Delta
Tue 10/69:45 pm
PDX
- TYS
1 stop8h 27m
Delta
Deal found 6/10![Delta logo]()
$293
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:55 pm
TYS
- PDX
1 stop9h 31m
Delta
Mon 11/211:39 am
PDX
- TYS
1 stop8h 23m
Delta
Deal found 6/10![Delta logo]()
$324
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/297:00 am
TYS
- PDX
1 stop7h 28m
United Airlines
Tue 9/17:16 am
PDX
- TYS
2 stops10h 08m
United Airlines
Deal found 6/11![United Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/3110:05 pm
TYS
- PDX
2 stops42h 53m
Multiple Airlines
Tue 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 6/11. 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.
Sat 8/296:50 am
TYS
- PDX
2 stops10h 10m
Southwest
Tue 9/15:50 am
PDX
- TYS
2 stops10h 05m
Southwest
Deal found 6/11![Southwest logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 9/286:30 am
TYS
- PDX
1 stop17h 09m
Multiple Airlines
Wed 10/73:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$337
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 7/148:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Mon 8/312:45 am
PDX
- TYS
1 stop7h 28m
American Airlines
Deal found 6/9![American Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 9/286:30 am
TYS
- PDX
1 stop17h 09m
Multiple Airlines
Sat 10/33:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$345
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 June 13, 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 June 13, 2026.
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:25 pm
TYS
- PDX
1 stop7h 55m
Delta
Sun 8/3011:20 pm
PDX
- TYS
1 stop8h 00m
Delta
Deal found 6/9![Delta logo]()
$406
This Southwest deal was found by Cheapflights users on 6/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 pm
TYS
- PDX
2 stops8h 40m
Southwest
Sat 9/1211:30 pm
PDX
- TYS
2 stops9h 55m
Southwest
Deal found 6/8![Southwest logo]()
$446
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sun 7/266:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Sat 8/110:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 6/8![United Airlines logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 8/247:00 am
TYS
- PDX
1 stop7h 28m
United Airlines
Wed 8/2610:50 am
PDX
- TYS
1 stop8h 39m
United Airlines
Deal found 6/10![United Airlines logo]()
$465
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:05 am
TYS
- PDX
2 stops12h 40m
Southwest
Thu 8/277:00 pm
PDX
- TYS
2 stops15h 25m
Southwest
Deal found 6/12![Southwest logo]()
$473
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Fri 7/246:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Sun 7/2611:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Deal found 6/9![United Airlines logo]()
$485
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sat 8/15:15 pm
TYS
- PDX
2 stops9h 40m
Southwest
Sun 8/98:00 pm
PDX
- TYS
2 stops14h 25m
Southwest
Deal found 6/9![Southwest logo]()
$513
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated June 13, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/38:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Tue 7/75:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Deal found 6/12![Frontier logo]()
$362
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:19 pm
TYS
- PDX
1 stop23h 12m
Frontier
Thu 7/1612:20 pm
PDX
- TYS
1 stop28h 04m
Frontier
Deal found 6/11![Frontier logo]()
$414
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 7/148:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Mon 8/312:45 am
PDX
- TYS
1 stop7h 28m
American Airlines
Deal found 6/9![American Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/148:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Mon 7/2012:45 am
PDX
- TYS
1 stop7h 28m
American Airlines
Deal found 6/11![American Airlines logo]()
$395
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Mon 7/2712:45 am
PDX
- TYS
1 stop9h 08m
American Airlines
Deal found 6/12![American Airlines logo]()
$406
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 7/208:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Tue 8/49:47 pm
PDX
- TYS
1 stop8h 56m
American Airlines
Deal found 6/10![American Airlines logo]()
$375
This American Airlines deal was found by Cheapflights users on 6/13. 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 7/226:10 pm
TYS
- PDX
1 stop8h 45m
American Airlines
Wed 7/295:49 am
PDX
- TYS
1 stop8h 48m
American Airlines
Deal found 6/13![American Airlines logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/3110:05 pm
TYS
- PDX
2 stops42h 53m
Multiple Airlines
Tue 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/318:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Tue 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Deal found 6/8![Frontier logo]()
$403
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 June 13, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This United Airlines deal was found by Cheapflights users on 6/13. 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 7/46:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 6/13![United Airlines logo]()
$198
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/268:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Deal found 6/12![Frontier logo]()
$200
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/225:31 pm
TYS
- PDX
1 stop10h 24m
American Airlines
Deal found 6/10![American Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Sun 8/97:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$218
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 7/196:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 6/11![United Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Wed 7/221:05 pm
TYS
- PDX
2 stops27h 53m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Wed 7/152:23 pm
TYS
- PDX
2 stops26h 35m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 7/1012:53 pm
TYS
- PDX
3 stops49h 42m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$243
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 7/148:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Deal found 6/10![American Airlines logo]()
$253
This CheapOair deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/198:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Deal found 6/10![Frontier logo]()
$256
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 June 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $281 (Kiwi.com) |
One-way from | $198 (United Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $593 |
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 June 13, 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
Quickest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 8/27
6:25 pm-11:20 pm
1 stop7h 55m
Portland
Sun 8/30
11:20 pm-10:20 am
1 stop8h 00m
$406
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 9/8
5:30 pm-11:10 pm
2 stops8h 40m
Portland
Sat 9/12
11:30 pm-12:25 pm
2 stops9h 55m
$446
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sun 7/26
6:00 am-11:37 am
1 stop8h 37m
Portland
Sat 8/1
10:40 pm-9:43 am
1 stop8h 03m
$457
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Mon 8/24
7:00 am-11:28 am
1 stop7h 28m
Portland
Wed 8/26
10:50 am-10:29 pm
1 stop8h 39m
$465
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 8/18
8:05 am-5:45 pm
2 stops12h 40m
Portland
Thu 8/27
7:00 pm-1:25 pm
2 stops15h 25m
$473
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 7/24
6:00 am-11:38 am
1 stop8h 38m
Portland
Sun 7/26
11:30 pm-10:42 am
1 stop8h 12m
$485
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 8/1
5:15 pm-11:55 pm
2 stops9h 40m
Portland
Sun 8/9
8:00 pm-1:25 pm
2 stops14h 25m
$513
Cheapest one-way
Quickest one-way
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 7/4
6:00 am-11:37 am
1 stop8h 37m
$198
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sun 8/9
7:00 am-4:51 pm
1 stop12h 51m
$218
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 6/26
8:32 pm-4:57 pm
1 stop23h 25m
$226
Showing 1-10 of 17 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 June.
| 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 3 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 $380). Flying from Knoxville to Portland in December is currently the most expensive (average of $618). 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 June 13, 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
Entertainment
7.8
Overall
7.9
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.8
Crew
8.5
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
Vancouver
Lincoln City
Longview
Lake Oswego
Hillsboro
Clackamas
Troutdale
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Gresham
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Alternative routes for Knoxville to Portland
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Complete your trip
Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.
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Knoxville and Portland flights
Browse other Knoxville and Portland flight options. Last updated on June 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 June 13, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 13, 2026.
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 June 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$279 | Average$474 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$536 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$353 | Average$594 | FlexibilityNo cancel fee | On-timeN/A |