$156+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Aug 3 — Aug 101
Round-trip
1 adult, Economy
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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 July 4, 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 July 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$352
This American Airlines deal was found by Cheapflights users on 6/30. 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.
Sat 9/127:00 am
PDX
- TYS
1 stop6h 42m
American Airlines
Tue 9/226:00 am
TYS
- PDX
1 stop7h 59m
American Airlines
Deal found 6/30![American Airlines logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 10/176:30 am
PDX
- TYS
1 stop9h 58m
American Airlines
Sat 10/246:00 am
TYS
- PDX
1 stop8h 06m
American Airlines
Deal found 7/1![American Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Sun 8/1612:20 pm
PDX
- TYS
2 stops31h 24m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Mon 8/176:29 pm
TYS
- PDX
2 stops25h 42m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 6/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:55 pm
PDX
- TYS
1 stop7h 41m
Delta
Tue 9/16:35 am
TYS
- PDX
1 stop7h 06m
Delta
Deal found 6/29![Delta logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Mon 8/176:29 pm
TYS
- PDX
2 stops25h 42m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Fri 8/212:51 pm
TYS
- PDX
2 stops29h 20m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 7/3. 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 10/147:30 am
PDX
- TYS
1 stop9h 48m
American Airlines
Wed 10/216:00 am
TYS
- PDX
1 stop8h 06m
American Airlines
Deal found 7/3![American Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 8/110:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Sat 8/86:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 7/2![United Airlines logo]()
$379
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 July 4, 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 July 4, 2026.
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 9/237:02 am
PDX
- TYS
1 stop6h 56m
United Airlines
Sat 9/266:00 am
TYS
- PDX
1 stop8h 33m
United Airlines
Deal found 7/2![United Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 6/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:55 pm
PDX
- TYS
1 stop7h 41m
Delta
Tue 9/16:35 am
TYS
- PDX
1 stop7h 06m
Delta
Deal found 6/29![Delta logo]()
$365
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:50 am
PDX
- TYS
2 stops10h 05m
Southwest
Sat 9/266:50 am
TYS
- PDX
2 stops10h 10m
Southwest
Deal found 7/2![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 6/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:30 pm
PDX
- TYS
2 stops9h 50m
Southwest
Sat 10/35:20 pm
TYS
- PDX
1 stop7h 00m
Southwest
Deal found 6/29![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 9/210:35 am
PDX
- TYS
1 stop7h 18m
United Airlines
Sat 9/55:45 am
TYS
- PDX
2 stops12h 20m
United Airlines
Deal found 7/2![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Sat 9/125:00 am
PDX
- TYS
2 stops8h 58m
United Airlines
Tue 9/226:00 am
TYS
- PDX
2 stops11h 47m
United Airlines
Deal found 6/30![United Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/1. 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 7/3111:30 pm
PDX
- TYS
2 stops9h 25m
Southwest
Fri 8/74:50 pm
TYS
- PDX
2 stops9h 25m
Southwest
Deal found 7/1![Southwest logo]()
$497
This Southwest deal was found by Cheapflights users on 6/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:35 pm
PDX
- TYS
2 stops9h 40m
Southwest
Mon 10/125:25 pm
TYS
- PDX
1 stop8h 40m
Southwest
Deal found 6/29![Southwest logo]()
$510
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated July 4, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated July 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/30. 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 7/2811:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Tue 8/41:35 pm
TYS
- PDX
1 stop9h 44m
United Airlines
Deal found 6/30![United Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 8/110:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Sat 8/86:00 am
TYS
- PDX
1 stop8h 37m
United Airlines
Deal found 7/2![United Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 8/115:16 pm
PDX
- TYS
1 stop23h 08m
Multiple Airlines
Mon 8/176:29 pm
TYS
- PDX
2 stops25h 42m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Mon 8/176:29 pm
TYS
- PDX
2 stops25h 42m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Wed 8/125:21 pm
PDX
- TYS
1 stop17h 40m
Multiple Airlines
Fri 8/212:51 pm
TYS
- PDX
2 stops29h 20m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:08 pm
PDX
- TYS
1 stop6h 44m
Delta
Tue 8/1812:01 pm
TYS
- PDX
1 stop9h 54m
Delta
Deal found 6/30![Delta logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Sun 8/1612:20 pm
PDX
- TYS
2 stops31h 24m
Multiple Airlines
Sun 8/237:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$362
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 8/2211:34 pm
PDX
- TYS
1 stop8h 32m
American Airlines
Sat 8/296:03 am
TYS
- PDX
1 stop7h 51m
American Airlines
Deal found 7/1![American Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 6/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:45 am
PDX
- TYS
1 stop6h 45m
Southwest
Wed 8/265:30 pm
TYS
- PDX
2 stops8h 40m
Southwest
Deal found 6/29![Southwest logo]()
$389
This Delta deal was found by Cheapflights users on 6/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:55 pm
PDX
- TYS
1 stop7h 41m
Delta
Tue 9/16:35 am
TYS
- PDX
1 stop7h 06m
Delta
Deal found 6/29![Delta logo]()
$365
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 July 4, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
This Booking.com deal was found by Cheapflights users on 6/30. 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 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
Deal found 6/30![Frontier logo]()
$156
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 7/2910:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 6/30![United Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
Thu 8/612:20 pm
PDX
- TYS
2 stops28h 58m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Thu 9/109:34 pm
PDX
- TYS
1 stop17h 39m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$182
This United Airlines deal was found by Cheapflights users on 6/29. 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.
Thu 8/611:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Deal found 6/29![United Airlines logo]()
$188
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 8/110:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Deal found 7/1![United Airlines logo]()
$200
This Southwest deal was found by Cheapflights users on 6/30. 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.
Thu 9/106:15 am
PDX
- TYS
2 stops10h 40m
Southwest
Deal found 6/30![Southwest logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Thu 7/306:49 pm
PDX
- TYS
3 stops24h 11m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$215
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Fri 7/315:49 am
PDX
- TYS
1 stop8h 48m
American Airlines
Deal found 7/1![American Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 7/3. 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 8/311:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 7/3![Southwest logo]()
$234
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 July 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $352 (Kiwi.com) |
One-way from | $156 (Booking.com) |
Popular in | May |
Cheapest in | October |
Average price | $498 |
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 July 4, 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
Wed 9/23
7:02 am-4:58 pm
1 stop6h 56m
Knoxville McGhee Tyson
Sat 9/26
6:00 am-11:33 am
1 stop8h 33m
$355
Quickest round-trip
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 8/27
10:55 pm-9:36 am
1 stop7h 41m
Knoxville McGhee Tyson
Tue 9/1
6:35 am-10:41 am
1 stop7h 06m
$365
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 9/23
5:50 am-6:55 pm
2 stops10h 05m
Knoxville McGhee Tyson
Sat 9/26
6:50 am-2:00 pm
2 stops10h 10m
$395
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sun 9/27
11:30 pm-12:20 pm
2 stops9h 50m
Knoxville McGhee Tyson
Sat 10/3
5:20 pm-9:20 pm
1 stop7h 00m
$411
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 9/2
10:35 am-8:53 pm
1 stop7h 18m
Knoxville McGhee Tyson
Sat 9/5
5:45 am-3:05 pm
2 stops12h 20m
$470
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 9/12
5:00 am-4:58 pm
2 stops8h 58m
Knoxville McGhee Tyson
Tue 9/22
6:00 am-2:47 pm
2 stops11h 47m
$475
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Fri 7/31
11:30 pm-11:55 am
2 stops9h 25m
Knoxville McGhee Tyson
Fri 8/7
4:50 pm-11:15 pm
2 stops9h 25m
$497
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 10/8
11:35 pm-12:15 pm
2 stops9h 40m
Knoxville McGhee Tyson
Mon 10/12
5:25 pm-11:05 pm
1 stop8h 40m
$510
Cheapest one-way
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 8/6
11:30 pm-10:42 am
1 stop8h 12m
$188
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 8/1
10:40 pm-9:43 am
1 stop8h 03m
$200
Showing 1-10 of 18 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 July.
| 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 45 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 July 4, 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.
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
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
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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 July 4, 2026.
Portland and Knoxville flights
Browse other Portland and Knoxville flight options. Last updated on July 4, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on July 4, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Portland to Knoxville
Discover the top 3 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 July 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$498 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$304 | Average$472 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$328 | Average$536 | FlexibilityNo cancel fee | On-time69% |