$188+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Jun 24 — Jul 11
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 May 25, 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 May 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/25. 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 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 5/25![Multiple Airlines logo]()
$373
This CheapOair deal was found by Cheapflights users on 5/24. 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 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
Tue 6/235:20 pm
PDX
- TYS
1 stop23h 17m
Frontier
Deal found 5/24![Frontier logo]()
$380
This American Airlines deal was found by Cheapflights users on 5/25. 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.
Wed 10/285:37 pm
TYS
- PDX
1 stop7h 20m
American Airlines
Mon 11/212:00 pm
PDX
- TYS
1 stop8h 52m
American Airlines
Deal found 5/25![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 5/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:25 pm
TYS
- PDX
1 stop10h 50m
American Airlines
Wed 11/1812:00 pm
PDX
- TYS
1 stop8h 52m
American Airlines
Deal found 5/23![American Airlines logo]()
$395
This American Airlines deal was found by Cheapflights users on 5/25. 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.
Thu 8/205:33 pm
TYS
- PDX
1 stop8h 36m
American Airlines
Thu 8/2710:58 pm
PDX
- TYS
1 stop8h 45m
American Airlines
Deal found 5/25![American Airlines logo]()
$413
This United Airlines deal was found by Cheapflights users on 5/21. 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 6/166:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Wed 6/1710:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 5/21![United Airlines logo]()
$414
This American Airlines deal was found by Cheapflights users on 5/21. 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 7/154:07 pm
TYS
- PDX
1 stop10h 48m
American Airlines
Tue 7/2111:41 pm
PDX
- TYS
1 stop8h 32m
American Airlines
Deal found 5/21![American Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 5/21. 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 5/21![Delta logo]()
$416
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 May 25, 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 May 25, 2026.
This Southwest deal was found by Cheapflights users on 5/20. 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 11/117:00 am
TYS
- PDX
2 stops9h 10m
Southwest
Wed 11/186:20 am
PDX
- TYS
1 stop6h 10m
Southwest
Deal found 5/20![Southwest logo]()
$400
This United Airlines deal was found by Cheapflights users on 5/22. 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 8/266:02 pm
TYS
- PDX
1 stop7h 50m
United Airlines
Sun 8/3011:02 pm
PDX
- TYS
1 stop7h 55m
United Airlines
Deal found 5/22![United Airlines logo]()
$435
This Delta deal was found by Cheapflights users on 5/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:42 pm
TYS
- PDX
1 stop7h 36m
Delta
Wed 7/81:45 pm
PDX
- TYS
1 stop6h 16m
Delta
Deal found 5/22![Delta logo]()
$437
This American Airlines deal was found by Cheapflights users on 5/20. 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 7/98:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Thu 7/2311:15 pm
PDX
- TYS
1 stop8h 50m
American Airlines
Deal found 5/20![American Airlines logo]()
$511
This Southwest deal was found by Cheapflights users on 5/21. 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 10/281:50 pm
TYS
- PDX
2 stops10h 25m
Southwest
Mon 11/25:10 am
PDX
- TYS
2 stops10h 35m
Southwest
Deal found 5/21![Southwest logo]()
$447
This Delta deal was found by Cheapflights users on 5/24. 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.
Thu 8/276:15 pm
TYS
- PDX
1 stop8h 10m
Delta
Sun 8/3010:55 pm
PDX
- TYS
1 stop9h 16m
Delta
Deal found 5/24![Delta logo]()
$447
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Mon 7/134:56 pm
TYS
- PDX
1 stop9h 17m
United Airlines
Wed 7/1510:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 5/24![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 5/25. 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 6/195:40 am
TYS
- PDX
1 stop7h 50m
Delta
Sat 6/2710:30 pm
PDX
- TYS
1 stop8h 08m
Delta
Deal found 5/25![Delta logo]()
$487
This Southwest deal was found by Cheapflights users on 5/25. 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.
Mon 9/212:05 pm
TYS
- PDX
2 stops11h 40m
Southwest
Mon 9/2811:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 5/25![Southwest logo]()
$517
This United Airlines deal was found by Cheapflights users on 5/22. 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.
Thu 8/274:50 pm
TYS
- PDX
1 stop9h 04m
United Airlines
Sun 8/3011:02 pm
PDX
- TYS
2 stops12h 35m
United Airlines
Deal found 5/22![United Airlines logo]()
$550
This Southwest deal was found by Cheapflights users on 5/25. 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.
Thu 8/272:05 pm
TYS
- PDX
2 stops11h 40m
Southwest
Sun 8/308:00 pm
PDX
- TYS
2 stops12h 55m
Southwest
Deal found 5/25![Southwest logo]()
$524
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated May 25, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated May 25, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/21. 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 6/166:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Wed 6/1710:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 5/21![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 5/20. 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 6/166:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Sat 6/2010:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 5/20![United Airlines logo]()
$426
This CheapOair deal was found by Cheapflights users on 5/24. 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 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
Tue 6/235:20 pm
PDX
- TYS
1 stop23h 17m
Frontier
Deal found 5/24![Frontier logo]()
$380
This CheapOair deal was found by Cheapflights users on 5/25. 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 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
Sun 6/2812:26 pm
PDX
- TYS
1 stop28h 11m
Frontier
Deal found 5/25![Frontier logo]()
$420
This American Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Wed 7/811:15 pm
PDX
- TYS
1 stop8h 50m
American Airlines
Deal found 5/21![American Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Wed 7/85:49 am
PDX
- TYS
1 stop8h 47m
American Airlines
Deal found 5/22![American Airlines logo]()
$421
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Wed 6/241:02 pm
TYS
- PDX
2 stops27h 46m
Multiple Airlines
Wed 7/85:21 pm
PDX
- TYS
1 stop17h 30m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/254:05 pm
TYS
- PDX
2 stops27h 02m
Multiple Airlines
Wed 7/85:21 pm
PDX
- TYS
1 stop17h 30m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$453
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 May 25, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
This United Airlines deal was found by Cheapflights users on 5/22. 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 9/169:00 am
TYS
- PDX
1 stop9h 05m
United Airlines
Deal found 5/22![United Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Sun 10/114:27 pm
TYS
- PDX
1 stop27h 08m
Frontier
Deal found 5/23![Frontier logo]()
$196
This Southwest deal was found by Cheapflights users on 5/22. 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 9/161:55 pm
TYS
- PDX
2 stops11h 25m
Southwest
Deal found 5/22![Southwest logo]()
$203
This CheapOair deal was found by Cheapflights users on 5/24. 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 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 5/24![Frontier logo]()
$206
This United Airlines deal was found by Cheapflights users on 5/23. 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.
Thu 8/134:50 pm
TYS
- PDX
1 stop7h 15m
United Airlines
Deal found 5/23![United Airlines logo]()
$219
This Delta deal was found by Cheapflights users on 5/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:15 pm
TYS
- PDX
1 stop7h 38m
Delta
Deal found 5/23![Delta logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Sun 10/116:30 am
TYS
- PDX
2 stops32h 09m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$241
This United Airlines deal was found by Cheapflights users on 5/23. 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.
Sat 10/105:05 pm
TYS
- PDX
1 stop8h 47m
United Airlines
Deal found 5/23![United Airlines logo]()
$242
This Southwest deal was found by Cheapflights users on 5/23. 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.
Thu 8/132:05 pm
TYS
- PDX
2 stops11h 40m
Southwest
Deal found 5/23![Southwest logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Fri 10/95:31 pm
TYS
- PDX
2 stops26h 04m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$251
This CheapOair deal was found by Cheapflights users on 5/23. 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 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
Deal found 5/23![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 May 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $373 (Kiwi.com) |
One-way from | $188 (United Airlines) |
Popular in | December |
Cheapest in | August |
Average price | $540 |
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 May 25, 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
Wed 11/11
7:00 am-1:10 pm
2 stops9h 10m
Portland
Wed 11/18
6:20 am-3:30 pm
1 stop6h 10m
$400
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Wed 8/26
6:02 pm-10:52 pm
1 stop7h 50m
Portland
Sun 8/30
11:02 pm-9:57 am
1 stop7h 55m
$435
Quickest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 7/2
6:42 pm-11:18 pm
1 stop7h 36m
Portland
Wed 7/8
1:45 pm-11:01 pm
1 stop6h 16m
$437
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Wed 10/28
1:50 pm-9:15 pm
2 stops10h 25m
Portland
Mon 11/2
5:10 am-6:45 pm
2 stops10h 35m
$447
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 8/27
6:15 pm-11:25 pm
1 stop8h 10m
Portland
Sun 8/30
10:55 pm-11:11 am
1 stop9h 16m
$447
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Mon 7/13
4:56 pm-11:13 pm
1 stop9h 17m
Portland
Wed 7/15
10:40 pm-9:43 am
1 stop8h 03m
$454
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Fri 6/19
5:40 am-10:30 am
1 stop7h 50m
Portland
Sat 6/27
10:30 pm-9:38 am
1 stop8h 08m
$487
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 7/9
8:11 pm-12:55 am
1 stop7h 44m
Portland
Thu 7/23
11:15 pm-11:05 am
1 stop8h 50m
$511
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Mon 9/21
2:05 pm-10:45 pm
2 stops11h 40m
Portland
Mon 9/28
11:30 pm-12:05 pm
2 stops9h 35m
$517
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 8/27
2:05 pm-10:45 pm
2 stops11h 40m
Portland
Sun 8/30
8:00 pm-11:55 am
2 stops12h 55m
$524
Showing 1-10 of 18 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 May.
| 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, August is the cheapest month in which you can book a flight from Knoxville to Portland (average of $335). 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 May 25, 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
Comfort
7.8
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
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.
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Book flights to Portland if you plan to visit one of these locationsBeaverton
Seaside
Vancouver
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Longview
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Clackamas
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Long Beach
McMinnville
Tigard
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Gresham
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$279 | Average$442 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$279 | Average$558 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$345 | Average$536 | FlexibilityNo cancel fee | On-time69% |