$147+ Cheap flights from Portland to Knoxville (PDX - TYS)
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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Jul 11 — Jul 181
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Knoxville with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Portland to KnoxvilleExplore the most affordable flight options available from Portland to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
Explore the most affordable flight options available from Portland to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
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.
Tue 8/185:00 am
PDX
- TYS
1 stop7h 54m
United Airlines
Tue 8/257:00 am
TYS
- PDX
1 stop7h 28m
United Airlines
Deal found 6/9![United Airlines logo]()
$293
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Thu 10/86:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$310
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.
Sat 9/127:00 am
PDX
- TYS
1 stop6h 42m
American Airlines
Tue 9/225:35 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/11![American Airlines logo]()
$324
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.
Thu 10/297:55 am
PDX
- TYS
1 stop7h 45m
Southwest
Tue 11/37:00 am
TYS
- PDX
2 stops9h 10m
Southwest
Deal found 6/11![Southwest logo]()
$330
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Sun 8/97:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$333
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 11/1011:40 am
PDX
- TYS
2 stops9h 12m
American Airlines
Tue 11/174:27 pm
TYS
- PDX
1 stop9h 32m
American Airlines
Deal found 6/11![American Airlines logo]()
$347
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.
Sat 8/811:40 pm
PDX
- TYS
1 stop7h 03m
United Airlines
Sat 8/156:02 pm
TYS
- PDX
1 stop7h 50m
United Airlines
Deal found 6/9![United Airlines logo]()
$355
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.
Wed 12/211:59 pm
PDX
- TYS
2 stops10h 10m
American Airlines
Wed 12/96:20 pm
TYS
- PDX
1 stop7h 36m
American Airlines
Deal found 6/9![American Airlines logo]()
$366
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.
Sat 8/2211:58 am
PDX
- TYS
1 stop8h 20m
American Airlines
Sat 8/296:03 am
TYS
- PDX
1 stop7h 51m
American Airlines
Deal found 6/10![American Airlines logo]()
$367
Best flights from Portland to KnoxvilleDiscover carefully curated flight deals from Portland to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
Discover carefully curated flight deals from Portland to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
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.
Tue 8/185:00 am
PDX
- TYS
1 stop7h 54m
United Airlines
Tue 8/257:00 am
TYS
- PDX
1 stop7h 28m
United Airlines
Deal found 6/9![United Airlines logo]()
$293
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 9/1211:30 pm
PDX
- TYS
2 stops9h 55m
Southwest
Tue 9/223:00 pm
TYS
- PDX
1 stop10h 15m
Southwest
Deal found 6/9![Southwest logo]()
$435
This Delta deal was found by Cheapflights users on 6/6. 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 11/26:04 am
PDX
- TYS
1 stop8h 14m
Delta
Sun 11/85:30 am
TYS
- PDX
1 stop8h 26m
Delta
Deal found 6/6![Delta logo]()
$467
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.
Sat 7/45:00 am
PDX
- TYS
1 stop7h 53m
United Airlines
Fri 7/104:56 pm
TYS
- PDX
1 stop9h 17m
United Airlines
Deal found 6/8![United Airlines logo]()
$426
This Delta deal was found by Cheapflights users on 6/6. 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 10/210:55 pm
PDX
- TYS
1 stop8h 30m
Delta
Fri 10/96:15 pm
TYS
- PDX
1 stop8h 32m
Delta
Deal found 6/6![Delta logo]()
$467
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.
Tue 8/2511:02 pm
PDX
- TYS
1 stop7h 55m
United Airlines
Sat 8/297:15 am
TYS
- PDX
1 stop7h 44m
United Airlines
Deal found 6/9![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 6/6. 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 11/28:25 am
PDX
- TYS
1 stop7h 20m
Southwest
Sun 11/87:05 am
TYS
- PDX
2 stops9h 45m
Southwest
Deal found 6/6![Southwest logo]()
$502
This Delta deal was found by Cheapflights users on 6/6. 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 7/3010:55 pm
PDX
- TYS
1 stop7h 41m
Delta
Mon 8/34:38 pm
TYS
- PDX
1 stop8h 06m
Delta
Deal found 6/6![Delta logo]()
$478
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 9/127:15 pm
PDX
- TYS
2 stops11h 42m
United Airlines
Tue 9/226:00 am
TYS
- PDX
1 stop8h 28m
United Airlines
Deal found 6/11![United Airlines logo]()
$439
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.
Thu 7/211:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Sat 7/256:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 6/11![United Airlines logo]()
$487
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated June 11, 2026 and is based on user searches.
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.
Tue 6/3010:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Sat 7/46:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 6/9![United Airlines logo]()
$430
This Booking.com deal was found by Cheapflights users on 6/6. 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.
Tue 6/305:20 pm
PDX
- TYS
1 stop23h 17m
Frontier
Wed 7/88:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Deal found 6/6![Frontier logo]()
$434
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.
Sat 7/45:00 am
PDX
- TYS
1 stop7h 53m
United Airlines
Fri 7/104:56 pm
TYS
- PDX
1 stop9h 17m
United Airlines
Deal found 6/8![United Airlines logo]()
$426
This American Airlines deal was found by Cheapflights users on 6/6. 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 7/45:07 am
PDX
- TYS
1 stop8h 33m
American Airlines
Fri 7/106:07 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/6![American Airlines logo]()
$431
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Mon 7/138:19 pm
TYS
- PDX
1 stop23h 12m
Frontier
Deal found 6/10![Frontier logo]()
$393
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.
Wed 7/2211:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Wed 7/294:56 pm
TYS
- PDX
1 stop9h 17m
United Airlines
Deal found 6/9![United Airlines logo]()
$396
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2312:45 am
PDX
- TYS
1 stop9h 08m
American Airlines
Sat 8/18:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Deal found 6/8![American Airlines logo]()
$457
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 7/295:21 pm
PDX
- TYS
1 stop17h 30m
Multiple Airlines
Mon 8/35:32 pm
TYS
- PDX
2 stops25h 59m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$429
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 7/2911:15 pm
PDX
- TYS
1 stop8h 50m
American Airlines
Mon 8/36:07 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/10![American Airlines logo]()
$456
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3012:20 pm
PDX
- TYS
1 stop28h 04m
Frontier
Mon 8/38:19 pm
TYS
- PDX
1 stop23h 12m
Frontier
Deal found 6/9![Frontier logo]()
$392
One-way flights from Portland to KnoxvilleSearch for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
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 8/49:47 pm
PDX
- TYS
1 stop8h 56m
American Airlines
Deal found 6/9![American Airlines logo]()
$147
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.
Tue 8/411:40 pm
PDX
- TYS
2 stops11h 47m
United Airlines
Deal found 6/9![United Airlines logo]()
$183
This American Airlines deal was found by Cheapflights users on 6/6. 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.
Fri 7/39:47 pm
PDX
- TYS
1 stop7h 44m
American Airlines
Deal found 6/6![American Airlines logo]()
$198
This Mytrip deal was found by Cheapflights users on 6/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:16 pm
PDX
- TYS
1 stop23h 08m
Frontier
Deal found 6/6![Frontier logo]()
$225
This Delta deal was found by Cheapflights users on 6/7. 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 7/1311:15 pm
PDX
- TYS
1 stop8h 07m
Delta
Deal found 6/7![Delta logo]()
$229
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:20 pm
PDX
- TYS
3 stops51h 08m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$233
This United Airlines deal was found by Cheapflights users on 6/7. 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 7/711:40 pm
PDX
- TYS
2 stops11h 47m
United Airlines
Deal found 6/7![United Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 8/2012:26 pm
PDX
- TYS
2 stops30h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 6/6. 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 7/311:30 pm
PDX
- TYS
2 stops9h 20m
Southwest
Deal found 6/6![Southwest logo]()
$245
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:49 pm
PDX
- TYS
1 stop16h 08m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$247
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.
Thu 7/2311:15 pm
PDX
- TYS
1 stop8h 50m
American Airlines
Deal found 6/10![American Airlines logo]()
$249
Find flight deals from Portland to Knoxville
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Knoxville (TYS). 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 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $293 (United Airlines) |
One-way from | $147 (American Airlines) |
Popular in | May |
Cheapest in | August |
Average price | $516 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to Knoxville 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 11, 2026.
Use the filters below to find and compare flights from Portland to Knoxville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 8/18
5:00 am-3:54 pm
1 stop7h 54m
Knoxville McGhee Tyson
Tue 8/25
7:00 am-11:28 am
1 stop7h 28m
$293
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 7/4
5:00 am-3:53 pm
1 stop7h 53m
Knoxville McGhee Tyson
Fri 7/10
4:56 pm-11:13 pm
1 stop9h 17m
$426
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 8/25
11:02 pm-9:57 am
1 stop7h 55m
Knoxville McGhee Tyson
Sat 8/29
7:15 am-11:59 am
1 stop7h 44m
$434
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 9/12
11:30 pm-12:25 pm
2 stops9h 55m
Knoxville McGhee Tyson
Tue 9/22
3:00 pm-10:15 pm
1 stop10h 15m
$435
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 9/12
7:15 pm-9:57 am
2 stops11h 42m
Knoxville McGhee Tyson
Tue 9/22
6:00 am-11:28 am
1 stop8h 28m
$439
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 11/2
6:04 am-5:18 pm
1 stop8h 14m
Knoxville McGhee Tyson
Sun 11/8
5:30 am-10:56 am
1 stop8h 26m
$467
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Fri 10/2
10:55 pm-10:25 am
1 stop8h 30m
Knoxville McGhee Tyson
Fri 10/9
6:15 pm-11:47 pm
1 stop8h 32m
$467
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 7/30
10:55 pm-9:36 am
1 stop7h 41m
Knoxville McGhee Tyson
Mon 8/3
4:38 pm-9:44 pm
1 stop8h 06m
$478
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 7/2
11:30 pm-10:42 am
1 stop8h 12m
Knoxville McGhee Tyson
Sat 7/25
6:00 am-11:37 am
1 stop8h 37m
$487
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 11/2
8:25 am-6:45 pm
1 stop7h 20m
Knoxville McGhee Tyson
Sun 11/8
7:05 am-1:50 pm
2 stops9h 45m
$502
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Portland to Knoxville
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 Portland to Knoxville 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 Portland-Knoxville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Knoxville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Knoxville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-Knoxville 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 Portland-Knoxville 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 Portland to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville from Portland with our price prediction graph.
PDX-TYS
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 Portland to Knoxville
How far ahead should I book a flight from Portland to Knoxville?
The best time to book flights from Portland to Knoxville is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Portland to Knoxville?
Currently, August is the cheapest month in which you can book a flight from Portland to Knoxville (average of $388). Flying from Portland to Knoxville in May is currently the most expensive (average of $611). 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 Portland to Knoxville?
Reviews of airlines servicing Knoxville
Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated June 11, 2026.
Read through reviews of airlines operating flights from Portland to Knoxville, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
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 Portland to Knoxville. 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 Knoxville?
Book flights to Knoxville if you plan to visit one of these locationsCherokee
Crossville
Morristown
Bryson City
Murphy
Alcoa
Oak Ridge
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Other flights to Knoxville
Explore flights to Knoxville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 11, 2026.
Portland and Knoxville flights
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Other flights from Portland
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Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Portland to Knoxville
Discover the top 4 airlines that operate flights from Portland to Knoxville. 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 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$278 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$268 | Average$487 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$308 | Average$474 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$328 | Average$516 | FlexibilityNo cancel fee | On-time69% |