$159+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Aug 31 — Sep 71
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Knoxville 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
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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 August 1, 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 August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sat 10/2412:34 pm
PDX
- TYS
1 stop21h 37m
Multiple Airlines
Sun 11/16:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 10/215:35 pm
PDX
- TYS
1 stop16h 36m
Multiple Airlines
Sun 10/256:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 10/512:38 pm
PDX
- TYS
2 stops26h 12m
Multiple Airlines
Sun 10/256:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sat 10/2412:34 pm
PDX
- TYS
1 stop21h 37m
Multiple Airlines
Thu 10/296:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:20 pm
PDX
- TYS
1 stop22h 24m
Multiple Airlines
Sat 9/123:51 pm
TYS
- PDX
2 stops22h 52m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/246:17 pm
PDX
- TYS
2 stops17h 18m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 10/215:35 pm
PDX
- TYS
1 stop16h 36m
Multiple Airlines
Sun 11/16:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 10/112:38 pm
PDX
- TYS
2 stops26h 30m
Multiple Airlines
Sun 10/256:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/185:56 pm
PDX
- TYS
2 stops18h 03m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 10/512:38 pm
PDX
- TYS
2 stops26h 12m
Multiple Airlines
Thu 10/296:30 am
TYS
- PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$328
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 August 1, 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 August 1, 2026.
This Southwest deal was found by Cheapflights users on 7/29. 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.
Tue 8/255:50 am
PDX
- TYS
2 stops10h 05m
Southwest
Sat 8/291:55 pm
TYS
- PDX
1 stop7h 30m
Southwest
Deal found 7/29![Southwest logo]()
$368
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:20 pm
PDX
- TYS
1 stop8h 00m
Delta
Sun 11/156:00 am
TYS
- PDX
1 stop7h 45m
Delta
Deal found 7/31![Delta logo]()
$445
This Southwest deal was found by Cheapflights users on 7/29. 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.
Tue 9/2911:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Sat 10/32:55 pm
TYS
- PDX
2 stops9h 30m
Southwest
Deal found 7/29![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 7/30. 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 10/2911:35 pm
PDX
- TYS
2 stops9h 40m
Southwest
Wed 11/47:00 am
TYS
- PDX
2 stops11h 00m
Southwest
Deal found 7/30![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:30 pm
PDX
- TYS
2 stops11h 20m
Southwest
Sat 9/126:50 am
TYS
- PDX
2 stops10h 10m
Southwest
Deal found 7/31![Southwest logo]()
$374
This Southwest deal was found by Cheapflights users on 7/27. 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 9/511:30 pm
PDX
- TYS
2 stops11h 20m
Southwest
Fri 9/115:45 pm
TYS
- PDX
2 stops9h 00m
Southwest
Deal found 7/27![Southwest logo]()
$374
This Southwest deal was found by Cheapflights users on 8/1. 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.
Tue 9/225:50 am
PDX
- TYS
2 stops10h 10m
Southwest
Thu 9/244:50 pm
TYS
- PDX
1 stop7h 25m
Southwest
Deal found 8/1![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 7/29. 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 9/1011:30 pm
PDX
- TYS
2 stops9h 50m
Southwest
Sun 9/135:55 pm
TYS
- PDX
2 stops9h 15m
Southwest
Deal found 7/29![Southwest logo]()
$435
This Southwest deal was found by Cheapflights users on 8/1. 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.
Tue 8/255:50 am
PDX
- TYS
2 stops10h 05m
Southwest
Fri 8/282:05 pm
TYS
- PDX
2 stops10h 10m
Southwest
Deal found 8/1![Southwest logo]()
$444
This Southwest deal was found by Cheapflights users on 7/30. 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.
Fri 8/285:45 am
PDX
- TYS
2 stops9h 50m
Southwest
Fri 9/42:05 pm
TYS
- PDX
2 stops12h 15m
Southwest
Deal found 7/30![Southwest logo]()
$455
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated August 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/185:56 pm
PDX
- TYS
2 stops18h 03m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Mon 8/3110:00 am
TYS
- PDX
2 stops34h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Tue 8/2510:30 am
TYS
- PDX
2 stops33h 41m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Thu 8/277:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2012:20 pm
PDX
- TYS
2 stops27h 23m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2112:20 pm
PDX
- TYS
2 stops26h 46m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2212:20 pm
PDX
- TYS
2 stops20h 45m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2312:20 pm
PDX
- TYS
2 stops27h 23m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/246:17 pm
PDX
- TYS
2 stops17h 18m
Multiple Airlines
Sun 8/307:00 am
TYS
- PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$319
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 August 1, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:35 pm
PDX
- TYS
2 stops27h 01m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/195:56 pm
PDX
- TYS
1 stop16h 53m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$163
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/205:18 am
PDX
- TYS
1 stop8h 25m
American Airlines
Deal found 7/28![American Airlines logo]()
$182
This Southwest deal was found by Cheapflights users on 7/28. 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 8/3111:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Deal found 7/28![Southwest logo]()
$187
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/195:00 am
PDX
- TYS
2 stops12h 53m
United Airlines
Deal found 7/28![United Airlines logo]()
$208
This Southwest deal was found by Cheapflights users on 7/28. 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 8/2010:45 pm
PDX
- TYS
2 stops10h 35m
Southwest
Deal found 7/28![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/316:17 pm
PDX
- TYS
3 stops36h 47m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$233
This Delta deal was found by Cheapflights users on 8/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:12 pm
PDX
- TYS
1 stop8h 05m
Delta
Deal found 8/1![Delta logo]()
$234
This deal was found by Cheapflights users on 7/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:27 pm
PDX
- TYS
1 stop6h 56m
United Airlines
Deal found 7/28![United Airlines logo]()
$237
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 August 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (Kiwi.com) |
One-way from | $159 (Kiwi.com) |
Popular in | May |
Cheapest in | August |
Average price | $412 |
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 August 1, 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 8/25
5:50 am-6:55 pm
2 stops10h 05m
Knoxville McGhee Tyson
Sat 8/29
1:55 pm-6:25 pm
1 stop7h 30m
$368
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 9/29
11:30 pm-12:05 pm
2 stops9h 35m
Knoxville McGhee Tyson
Sat 10/3
2:55 pm-9:25 pm
2 stops9h 30m
$373
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 10/29
11:35 pm-12:15 pm
2 stops9h 40m
Knoxville McGhee Tyson
Wed 11/4
7:00 am-3:00 pm
2 stops11h 00m
$373
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 9/5
11:30 pm-1:50 pm
2 stops11h 20m
Knoxville McGhee Tyson
Sat 9/12
6:50 am-2:00 pm
2 stops10h 10m
$374
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 9/5
11:30 pm-1:50 pm
2 stops11h 20m
Knoxville McGhee Tyson
Fri 9/11
5:45 pm-11:45 pm
2 stops9h 00m
$374
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 9/22
5:50 am-7:00 pm
2 stops10h 10m
Knoxville McGhee Tyson
Thu 9/24
4:50 pm-9:15 pm
1 stop7h 25m
$428
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 9/10
11:30 pm-12:20 pm
2 stops9h 50m
Knoxville McGhee Tyson
Sun 9/13
5:55 pm-12:10 am
2 stops9h 15m
$435
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 8/25
5:50 am-6:55 pm
2 stops10h 05m
Knoxville McGhee Tyson
Fri 8/28
2:05 pm-9:15 pm
2 stops10h 10m
$444
Quickest round-trip
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 11/11
11:20 pm-10:20 am
1 stop8h 00m
Knoxville McGhee Tyson
Sun 11/15
6:00 am-10:45 am
1 stop7h 45m
$445
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Fri 8/28
5:45 am-6:35 pm
2 stops9h 50m
Knoxville McGhee Tyson
Fri 9/4
2:05 pm-11:20 pm
2 stops12h 15m
$455
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 August.
| 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 38 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 $412). 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?
Airfare is below average for this route at the moment.
Portland to Knoxville flights typically cost between $326 and $498 in October.The cheapest round-trip price found within the last 5 days was $299 on Multiple Airlines (Oct 24-Nov 1).
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 August 1, 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.
Food
7.2
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Crew
8.5
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 August 1, 2026.
Portland and Knoxville flights
Browse other Portland and Knoxville flight options. Last updated on August 1, 2026.
Other flights from Portland
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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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$494 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$324 | Average$479 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$329 | Average$529 | FlexibilityNo cancel fee | On-time69% |