$151+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
May 3 — May 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
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 April 3, 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 April 3, 2026.
This CheapOair deal was found by Cheapflights users on 4/1. 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 8/288:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Tue 9/15:42 pm
PDX
- TYS
1 stop22h 55m
Frontier
Deal found 4/1![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 4/1. 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 6/58:32 pm
TYS
- PDX
1 stop23h 14m
Frontier
Tue 6/95:42 pm
PDX
- TYS
1 stop22h 55m
Frontier
Deal found 4/1![Frontier logo]()
$362
This CheapOair deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/208:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Tue 8/45:42 pm
PDX
- TYS
1 stop22h 55m
Frontier
Deal found 4/1![Frontier logo]()
$366
This American Airlines deal was found by Cheapflights users on 3/31. 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 4/284:09 pm
TYS
- PDX
1 stop8h 29m
American Airlines
Tue 5/511:23 pm
PDX
- TYS
1 stop8h 52m
American Airlines
Deal found 3/31![American Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 8/207:00 am
TYS
- PDX
1 stop12h 57m
Multiple Airlines
Thu 8/276:19 pm
PDX
- TYS
1 stop24h 22m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
TYS
- PDX
2 stops9h 08m
United Airlines
Tue 5/511:55 pm
PDX
- TYS
1 stop7h 11m
United Airlines
Deal found 3/31![United Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 4/2. 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 5/54:38 pm
TYS
- PDX
1 stop8h 24m
Delta
Sat 5/911:12 pm
PDX
- TYS
1 stop8h 09m
Delta
Deal found 4/2![Delta logo]()
$381
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 8/277:00 am
TYS
- PDX
1 stop12h 57m
Multiple Airlines
Sun 8/306:19 pm
PDX
- TYS
1 stop18h 39m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$383
This American Airlines deal was found by Cheapflights users on 3/31. 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 5/56:00 am
TYS
- PDX
1 stop8h 01m
American Airlines
Sat 5/911:48 am
PDX
- TYS
2 stops9h 08m
American Airlines
Deal found 3/31![American Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 5/278:00 am
TYS
- PDX
2 stops32h 54m
Multiple Airlines
Tue 6/25:46 pm
PDX
- TYS
1 stop22h 47m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 3/30. 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 5/127:00 am
TYS
- PDX
1 stop7h 37m
United Airlines
Mon 5/1811:55 pm
PDX
- TYS
1 stop7h 11m
United Airlines
Deal found 3/30![United Airlines logo]()
$390
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 April 3, 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 April 3, 2026.
This Southwest deal was found by Cheapflights users on 3/30. 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 9/148:25 am
TYS
- PDX
1 stop9h 35m
Southwest
Mon 9/2811:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 3/30![Southwest logo]()
$482
This United Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:57 pm
TYS
- PDX
1 stop8h 56m
United Airlines
Wed 6/32:12 pm
PDX
- TYS
1 stop7h 18m
United Airlines
Deal found 4/1![United Airlines logo]()
$485
This United Airlines deal was found by Cheapflights users on 3/31. 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 5/29:12 am
TYS
- PDX
2 stops12h 34m
United Airlines
Tue 5/57:45 pm
PDX
- TYS
2 stops11h 21m
United Airlines
Deal found 3/31![United Airlines logo]()
$501
This Southwest deal was found by Cheapflights users on 4/1. 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 6/56:40 am
TYS
- PDX
2 stops9h 35m
Southwest
Tue 6/97:50 am
PDX
- TYS
2 stops9h 30m
Southwest
Deal found 4/1![Southwest logo]()
$545
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/57:00 am
TYS
- PDX
2 stops17h 06m
United Airlines
Sat 5/95:30 am
PDX
- TYS
3 stops13h 53m
United Airlines
Deal found 3/29![United Airlines logo]()
$513
This United Airlines deal was found by Cheapflights users on 4/1. 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 5/14:20 pm
TYS
- PDX
1 stop7h 49m
United Airlines
Wed 5/65:20 am
PDX
- TYS
3 stops14h 03m
United Airlines
Deal found 4/1![United Airlines logo]()
$536
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/17:00 am
TYS
- PDX
2 stops17h 06m
United Airlines
Sat 5/97:45 pm
PDX
- TYS
2 stops11h 21m
United Airlines
Deal found 3/29![United Airlines logo]()
$542
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated April 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/31. 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 4/284:09 pm
TYS
- PDX
1 stop8h 29m
American Airlines
Tue 5/511:23 pm
PDX
- TYS
1 stop8h 52m
American Airlines
Deal found 3/31![American Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
TYS
- PDX
2 stops9h 08m
United Airlines
Tue 5/511:55 pm
PDX
- TYS
1 stop7h 11m
United Airlines
Deal found 3/31![United Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/293:58 pm
TYS
- PDX
2 stops9h 58m
American Airlines
Wed 5/61:52 pm
PDX
- TYS
1 stop7h 04m
American Airlines
Deal found 4/1![American Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 4/2. 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 5/54:38 pm
TYS
- PDX
1 stop8h 24m
Delta
Sat 5/911:12 pm
PDX
- TYS
1 stop8h 09m
Delta
Deal found 4/2![Delta logo]()
$381
This American Airlines deal was found by Cheapflights users on 3/31. 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 5/56:00 am
TYS
- PDX
1 stop8h 01m
American Airlines
Sat 5/911:48 am
PDX
- TYS
2 stops9h 08m
American Airlines
Deal found 3/31![American Airlines logo]()
$386
This United Airlines deal was found by Cheapflights users on 3/30. 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 5/127:00 am
TYS
- PDX
1 stop7h 37m
United Airlines
Mon 5/1811:55 pm
PDX
- TYS
1 stop7h 11m
United Airlines
Deal found 3/30![United Airlines logo]()
$390
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/123:58 pm
TYS
- PDX
2 stops9h 49m
American Airlines
Mon 5/1811:40 pm
PDX
- TYS
1 stop9h 50m
American Airlines
Deal found 3/30![American Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/205:09 pm
TYS
- PDX
1 stop9h 39m
American Airlines
Tue 5/265:49 am
PDX
- TYS
1 stop8h 48m
American Airlines
Deal found 3/30![American Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 5/278:00 am
TYS
- PDX
2 stops32h 54m
Multiple Airlines
Tue 6/25:46 pm
PDX
- TYS
1 stop22h 47m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 4/2. 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 5/288:48 am
TYS
- PDX
1 stop7h 18m
United Airlines
Mon 6/111:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Deal found 4/2![United Airlines logo]()
$405
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 April 3, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/151:43 pm
TYS
- PDX
1 stop9h 08m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$151
This CheapOair deal was found by Cheapflights users on 3/31. 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 3/31![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/201:15 pm
TYS
- PDX
3 stops49h 37m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$179
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/124:09 pm
TYS
- PDX
1 stop8h 29m
American Airlines
Deal found 3/30![American Airlines logo]()
$194
This American Airlines deal was found by Cheapflights users on 4/2. 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 5/146:54 pm
TYS
- PDX
1 stop8h 00m
American Airlines
Deal found 4/2![American Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 4/2. 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 6/118:11 pm
TYS
- PDX
1 stop7h 39m
American Airlines
Deal found 4/2![American Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/123:48 pm
TYS
- PDX
3 stops47h 02m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 5/143:55 pm
TYS
- PDX
3 stops27h 51m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$253
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 April 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $241 (CheapOair) |
One-way from | $151 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $444 |
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 April 3, 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
Mon 9/14
8:25 am-3:00 pm
1 stop9h 35m
Portland
Mon 9/28
11:30 pm-12:05 pm
2 stops9h 35m
$482
Quickest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 6/2
5:57 pm-11:53 pm
1 stop8h 56m
Portland
Wed 6/3
2:12 pm-12:30 am
1 stop7h 18m
$485
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 5/2
9:12 am-6:46 pm
2 stops12h 34m
Portland
Tue 5/5
7:45 pm-10:06 am
2 stops11h 21m
$501
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 5/5
7:00 am-9:06 pm
2 stops17h 06m
Portland
Sat 5/9
5:30 am-10:23 pm
3 stops13h 53m
$513
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 5/1
4:20 pm-9:09 pm
1 stop7h 49m
Portland
Wed 5/6
5:20 am-10:23 pm
3 stops14h 03m
$536
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 5/1
7:00 am-9:06 pm
2 stops17h 06m
Portland
Sat 5/9
7:45 pm-10:06 am
2 stops11h 21m
$542
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 6/5
6:40 am-1:15 pm
2 stops9h 35m
Portland
Tue 6/9
7:50 am-8:20 pm
2 stops9h 30m
$545
Cheapest one-way
Quickest one-way
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 5/15
1:43 pm-7:51 pm
1 stop9h 08m
$151
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Mon 6/15
8:32 pm-4:57 pm
1 stop23h 25m
$157
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 6/19
8:32 pm-4:57 pm
1 stop23h 25m
$157
Showing 1-10 of 15 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 April.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Portland. Price data was last updated on April 2, 2026.
Booking 38 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, August is the cheapest month in which you can book a flight from Knoxville to Portland (average of $135). Flying from Knoxville to Portland in March is currently the most expensive (average of $318). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
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 April 3, 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.
Crew
8.5
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Knoxville to 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
Pacific City
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
Portland flight routes
Alternative routes for Knoxville to Portland
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Knoxville to Portland by cabin class
Find flights from Knoxville to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Knoxville and Portland flights
Browse other Knoxville and Portland flight options. Last updated on April 3, 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 April 3, 2026.
Popular flight searches
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 April 3, 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 April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$250 | Average$367 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$279 | Average$418 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$328 | Average$519 | FlexibilityNo cancel fee | On-time69% |