$170+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Jul 17 — Jul 241
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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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 Portland to Knoxville
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Last-minute
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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 17, 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 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:34 pm
PDX
- TYS
1 stop21h 37m
Multiple Airlines
Thu 10/226:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$292
This Booking.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:20 pm
PDX
- TYS
1 stop28h 04m
Frontier
Mon 8/178:19 pm
TYS
- PDX
1 stop23h 38m
Frontier
Deal found 6/16![Frontier logo]()
$320
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.
Tue 10/2010:43 am
PDX
- TYS
1 stop7h 17m
United Airlines
Sat 10/2410:42 am
TYS
- PDX
2 stops10h 04m
United Airlines
Deal found 6/11![United Airlines logo]()
$329
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.
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 6/12![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 10/201:30 pm
PDX
- TYS
1 stop6h 48m
American Airlines
Sat 10/245:37 pm
TYS
- PDX
1 stop8h 36m
American Airlines
Deal found 6/11![American Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Sat 10/105:43 pm
TYS
- PDX
2 stops25h 52m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$354
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.
Wed 12/21:45 pm
PDX
- TYS
1 stop7h 05m
American Airlines
Wed 12/95:24 am
TYS
- PDX
1 stop8h 41m
American Airlines
Deal found 6/12![American Airlines logo]()
$355
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:34 pm
PDX
- TYS
2 stops26h 04m
Multiple Airlines
Thu 10/226:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$356
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:47 pm
PDX
- TYS
1 stop7h 44m
American Airlines
Wed 9/912:09 pm
TYS
- PDX
1 stop8h 43m
American Airlines
Deal found 6/16![American Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:50 am
PDX
- TYS
2 stops10h 33m
United Airlines
Sat 9/194:50 pm
TYS
- PDX
1 stop7h 15m
United Airlines
Deal found 6/16![United Airlines logo]()
$389
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 17, 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 17, 2026.
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:50 am
PDX
- TYS
2 stops10h 33m
United Airlines
Sat 9/194:50 pm
TYS
- PDX
1 stop7h 15m
United Airlines
Deal found 6/16![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:00 pm
PDX
- TYS
1 stop8h 17m
Delta
Sat 9/193:55 pm
TYS
- PDX
1 stop8h 50m
Delta
Deal found 6/14![Delta logo]()
$413
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:35 pm
PDX
- TYS
2 stops13h 25m
Southwest
Mon 8/174:50 pm
TYS
- PDX
2 stops9h 15m
Southwest
Deal found 6/16![Southwest logo]()
$429
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:02 pm
PDX
- TYS
1 stop7h 55m
United Airlines
Sat 9/196:00 am
TYS
- PDX
1 stop8h 28m
United Airlines
Deal found 6/16![United Airlines logo]()
$413
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:35 pm
PDX
- TYS
1 stop6h 29m
Delta
Fri 9/256:20 pm
TYS
- PDX
1 stop7h 47m
Delta
Deal found 6/13![Delta logo]()
$457
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:25 pm
PDX
- TYS
2 stops14h 30m
Southwest
Thu 10/227:10 am
TYS
- PDX
2 stops10h 30m
Southwest
Deal found 6/13![Southwest logo]()
$483
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:30 pm
PDX
- TYS
1 stop7h 15m
United Airlines
Fri 10/23:45 pm
TYS
- PDX
2 stops10h 08m
United Airlines
Deal found 6/12![United Airlines logo]()
$440
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Mon 7/205:23 pm
TYS
- PDX
1 stop7h 25m
Delta
Deal found 6/15![Delta logo]()
$487
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:00 am
PDX
- TYS
1 stop7h 43m
Delta
Mon 8/35:40 am
TYS
- PDX
1 stop7h 47m
Delta
Deal found 6/13![Delta logo]()
$487
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.
Tue 8/2510:35 am
PDX
- TYS
1 stop7h 18m
United Airlines
Sat 8/297:00 am
TYS
- PDX
1 stop7h 28m
United Airlines
Deal found 6/13![United Airlines logo]()
$494
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated June 17, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated June 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:47 pm
PDX
- TYS
1 stop7h 44m
American Airlines
Wed 9/912:09 pm
TYS
- PDX
1 stop8h 43m
American Airlines
Deal found 6/16![American Airlines logo]()
$375
This American Airlines deal was found by Cheapflights users on 6/14. 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 7/45:49 am
PDX
- TYS
1 stop8h 42m
American Airlines
Fri 7/106:07 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/14![American Airlines logo]()
$456
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 7/1110:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Sat 7/186:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 6/11![United Airlines logo]()
$457
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:07 am
PDX
- TYS
1 stop8h 34m
American Airlines
Wed 7/225:31 pm
TYS
- PDX
1 stop10h 24m
American Airlines
Deal found 6/15![American Airlines logo]()
$401
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1611:41 pm
PDX
- TYS
1 stop8h 32m
American Airlines
Thu 7/234:07 pm
TYS
- PDX
1 stop10h 48m
American Airlines
Deal found 6/15![American Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1811:15 pm
PDX
- TYS
1 stop8h 50m
American Airlines
Wed 7/225:31 pm
TYS
- PDX
1 stop10h 24m
American Airlines
Deal found 6/15![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:45 am
PDX
- TYS
1 stop9h 08m
American Airlines
Sun 7/268:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Deal found 6/16![American Airlines logo]()
$406
This Booking.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2312:20 pm
PDX
- TYS
1 stop28h 04m
Frontier
Wed 7/298:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Deal found 6/16![Frontier logo]()
$399
This American Airlines deal was found by Cheapflights users on 6/14. 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 7/2311:41 pm
PDX
- TYS
1 stop8h 32m
American Airlines
Wed 7/295:31 pm
TYS
- PDX
1 stop8h 20m
American Airlines
Deal found 6/14![American Airlines logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/233:57 pm
PDX
- TYS
2 stops26h 18m
Multiple Airlines
Sun 7/267:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$447
This Frontier 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 Frontier 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
Wed 8/58:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Deal found 6/12![Frontier logo]()
$410
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 17, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated June 17, 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.
Thu 9/109:34 pm
PDX
- TYS
1 stop17h 39m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$170
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.
Tue 9/158:00 am
PDX
- TYS
1 stop9h 52m
American Airlines
Deal found 6/12![American Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:22 pm
PDX
- TYS
2 stops19h 05m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$206
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2310:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 6/16![United Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/233:57 pm
PDX
- TYS
2 stops28h 36m
Allegiant Air
Deal found 6/16![Allegiant Air logo]()
$230
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.
Thu 7/2311:41 pm
PDX
- TYS
1 stop8h 32m
American Airlines
Deal found 6/13![American Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:00 pm
PDX
- TYS
2 stops14h 25m
Southwest
Deal found 6/15![Southwest logo]()
$240
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 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $320 (Booking.com) |
One-way from | $170 (Kiwi.com) |
Popular in | May |
Cheapest in | August |
Average price | $501 |
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 17, 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
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 9/15
10:50 am-12:23 am
2 stops10h 33m
Knoxville McGhee Tyson
Sat 9/19
4:50 pm-9:05 pm
1 stop7h 15m
$389
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 9/14
11:00 pm-10:17 am
1 stop8h 17m
Knoxville McGhee Tyson
Sat 9/19
3:55 pm-9:45 pm
1 stop8h 50m
$413
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 9/14
11:02 pm-9:57 am
1 stop7h 55m
Knoxville McGhee Tyson
Sat 9/19
6:00 am-11:28 am
1 stop8h 28m
$413
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 8/13
7:35 pm-12:00 pm
2 stops13h 25m
Knoxville McGhee Tyson
Mon 8/17
4:50 pm-11:05 pm
2 stops9h 15m
$429
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 9/28
11:30 pm-9:45 am
1 stop7h 15m
Knoxville McGhee Tyson
Fri 10/2
3:45 pm-10:53 pm
2 stops10h 08m
$440
Quickest round-trip
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Fri 9/18
1:35 pm-11:04 pm
1 stop6h 29m
Knoxville McGhee Tyson
Fri 9/25
6:20 pm-11:07 pm
1 stop7h 47m
$457
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 10/17
6:25 pm-11:55 am
2 stops14h 30m
Knoxville McGhee Tyson
Thu 10/22
7:10 am-2:40 pm
2 stops10h 30m
$483
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 7/13
11:15 pm-10:22 am
1 stop8h 07m
Knoxville McGhee Tyson
Mon 7/20
5:23 pm-9:48 pm
1 stop7h 25m
$487
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 7/30
6:00 am-4:43 pm
1 stop7h 43m
Knoxville McGhee Tyson
Mon 8/3
5:40 am-10:27 am
1 stop7h 47m
$487
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 8/25
10:35 am-8:53 pm
1 stop7h 18m
Knoxville McGhee Tyson
Sat 8/29
7:00 am-11:28 am
1 stop7h 28m
$494
Showing 1-10 of 15 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 15 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 $393). 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 17, 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.
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.9
Food
7.2
Entertainment
7.8
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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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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$326 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$268 | Average$487 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$308 | Average$470 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$328 | Average$516 | FlexibilityNo cancel fee | On-time69% |