$141+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Jun 13 — Jun 201
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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Best
Last-minute
One-way
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 May 14, 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 May 14, 2026.
This Booking.com deal was found by Cheapflights users on 5/10. 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.
Thu 8/2012:26 pm
PDX
- TYS
1 stop28h 11m
Frontier
Mon 8/248:32 pm
TYS
- PDX
1 stop23h 25m
Frontier
Deal found 5/10![Frontier logo]()
$348
This Booking.com deal was found by Cheapflights users on 5/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:26 pm
PDX
- TYS
1 stop28h 10m
Frontier
Wed 7/158:32 pm
TYS
- PDX
1 stop23h 21m
Frontier
Deal found 5/11![Frontier logo]()
$354
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1612:26 pm
PDX
- TYS
1 stop28h 10m
Frontier
Mon 7/208:32 pm
TYS
- PDX
1 stop22h 59m
Frontier
Deal found 5/12![Frontier logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sun 8/166:59 pm
PDX
- TYS
1 stop15h 58m
Multiple Airlines
Thu 8/207:00 am
TYS
- PDX
1 stop12h 57m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 6/812:40 am
PDX
- TYS
1 stop9h 22m
American Airlines
Tue 6/165:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/12![American Airlines logo]()
$395
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Thu 7/306:59 pm
PDX
- TYS
1 stop15h 58m
Multiple Airlines
Sun 8/27:00 am
TYS
- PDX
2 stops14h 04m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$396
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Mon 6/812:40 am
PDX
- TYS
1 stop7h 33m
American Airlines
Tue 6/235:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/13![American Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 5/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:16 am
PDX
- TYS
2 stops10h 08m
United Airlines
Wed 9/305:05 pm
TYS
- PDX
1 stop7h 00m
United Airlines
Deal found 5/14![United Airlines logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 9/249:34 pm
PDX
- TYS
1 stop15h 24m
Multiple Airlines
Mon 9/286:30 am
TYS
- PDX
2 stops13h 05m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$410
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 May 14, 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 May 14, 2026.
This United Airlines deal was found by Cheapflights users on 5/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:59 pm
PDX
- TYS
1 stop8h 00m
United Airlines
Sat 10/179:00 am
TYS
- PDX
1 stop7h 16m
United Airlines
Deal found 5/10![United Airlines logo]()
$416
This Delta deal was found by Cheapflights users on 5/13. 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 7/3011:15 pm
PDX
- TYS
1 stop8h 05m
Delta
Mon 8/35:22 pm
TYS
- PDX
1 stop7h 47m
Delta
Deal found 5/13![Delta logo]()
$458
This Southwest deal was found by Cheapflights users on 5/11. 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.
Wed 9/235:50 am
PDX
- TYS
2 stops10h 05m
Southwest
Mon 9/288:25 am
TYS
- PDX
1 stop9h 35m
Southwest
Deal found 5/11![Southwest logo]()
$482
This American Airlines deal was found by Cheapflights users on 5/9. 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.
Thu 6/412:40 am
PDX
- TYS
1 stop9h 22m
American Airlines
Sat 6/206:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 5/9![American Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 5/9. 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 7/2910:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
Sat 8/16:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Deal found 5/9![United Airlines logo]()
$454
This Southwest deal was found by Cheapflights users on 5/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
Thu 8/132:05 pm
TYS
- PDX
2 stops11h 40m
Southwest
Deal found 5/10![Southwest logo]()
$507
This United Airlines deal was found by Cheapflights users on 5/13. 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 9/111:02 pm
PDX
- TYS
1 stop7h 46m
United Airlines
Sat 9/56:02 pm
TYS
- PDX
1 stop8h 20m
United Airlines
Deal found 5/13![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Thu 5/282:27 pm
PDX
- TYS
1 stop6h 42m
United Airlines
Wed 6/36:00 am
TYS
- PDX
2 stops13h 47m
United Airlines
Deal found 5/12![United Airlines logo]()
$541
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated May 14, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated May 14, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Sun 5/179:46 pm
PDX
- TYS
1 stop22h 05m
Multiple Airlines
Mon 6/88:32 pm
TYS
- PDX
1 stop23h 03m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$441
This Kiwi.com deal was found by Cheapflights users on 5/12. 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.
Sun 5/179:46 pm
PDX
- TYS
1 stop22h 05m
Multiple Airlines
Sun 6/77:00 am
TYS
- PDX
1 stop12h 46m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sat 5/2312:35 pm
PDX
- TYS
1 stop22h 24m
Multiple Airlines
Wed 5/271:01 pm
TYS
- PDX
2 stops27h 53m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$451
This Delta deal was found by Cheapflights users on 5/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/249:39 pm
PDX
- TYS
1 stop8h 55m
Delta
Thu 5/285:40 am
TYS
- PDX
1 stop7h 26m
Delta
Deal found 5/10![Delta logo]()
$457
This American Airlines deal was found by Cheapflights users on 5/13. 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 5/286:37 am
PDX
- TYS
1 stop9h 54m
American Airlines
Wed 6/36:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 5/13![American Airlines logo]()
$426
This American Airlines deal was found by Cheapflights users on 5/11. 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.
Sun 5/3112:40 am
PDX
- TYS
1 stop9h 22m
American Airlines
Thu 6/45:33 pm
TYS
- PDX
1 stop8h 18m
American Airlines
Deal found 5/11![American Airlines logo]()
$437
This American Airlines deal was found by Cheapflights users on 5/10. 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.
Fri 6/512:40 am
PDX
- TYS
1 stop7h 33m
American Airlines
Tue 6/165:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/10![American Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 6/812:40 am
PDX
- TYS
1 stop9h 22m
American Airlines
Tue 6/165:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/12![American Airlines logo]()
$395
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Mon 6/812:40 am
PDX
- TYS
1 stop7h 33m
American Airlines
Tue 6/235:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/13![American Airlines logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 5/12. 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.
Tue 6/95:20 pm
PDX
- TYS
1 stop23h 17m
Multiple Airlines
Tue 6/164:45 pm
TYS
- PDX
2 stops49h 31m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 5/11. 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.
Fri 6/1910:59 pm
PDX
- TYS
1 stop8h 54m
American Airlines
Tue 6/235:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 5/11![American Airlines logo]()
$446
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 May 14, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated May 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Wed 8/265:42 pm
PDX
- TYS
1 stop17h 07m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Wed 9/303:22 pm
PDX
- TYS
1 stop18h 49m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Wed 9/25:42 pm
PDX
- TYS
1 stop17h 02m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$150
This Gotogate deal was found by Cheapflights users on 5/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2312:26 pm
PDX
- TYS
1 stop28h 10m
Frontier
Deal found 5/12![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Tue 9/15:42 pm
PDX
- TYS
1 stop22h 55m
Frontier
Deal found 5/13![Frontier logo]()
$164
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:35 pm
PDX
- TYS
1 stop27h 49m
Frontier
Deal found 5/12![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 5/12. 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.
Wed 6/105:20 pm
PDX
- TYS
1 stop17h 32m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Fri 9/45:42 pm
PDX
- TYS
2 stops41h 02m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$190
This Booking.com deal was found by Cheapflights users on 5/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:35 pm
PDX
- TYS
1 stop27h 49m
Frontier
Deal found 5/13![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 10/13:22 pm
PDX
- TYS
2 stops24h 01m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$193
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 May 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $348 (Booking.com) |
One-way from | $141 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $504 |
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 May 14, 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 10/13
10:59 pm-9:59 am
1 stop8h 00m
Knoxville McGhee Tyson
Sat 10/17
9:00 am-1:16 pm
1 stop7h 16m
$416
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 7/29
10:40 pm-9:43 am
1 stop8h 03m
Knoxville McGhee Tyson
Sat 8/1
6:00 am-11:38 am
1 stop8h 38m
$454
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 7/30
11:15 pm-10:20 am
1 stop8h 05m
Knoxville McGhee Tyson
Mon 8/3
5:22 pm-10:09 pm
1 stop7h 47m
$458
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 9/23
5:50 am-6:55 pm
2 stops10h 05m
Knoxville McGhee Tyson
Mon 9/28
8:25 am-3:00 pm
1 stop9h 35m
$482
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 8/10
11:30 pm-12:05 pm
2 stops9h 35m
Knoxville McGhee Tyson
Thu 8/13
2:05 pm-10:45 pm
2 stops11h 40m
$507
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 6/4
12:40 am-1:02 pm
1 stop9h 22m
Knoxville McGhee Tyson
Sat 6/20
6:07 pm-11:59 pm
1 stop8h 52m
$515
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 9/1
11:02 pm-9:48 am
1 stop7h 46m
Knoxville McGhee Tyson
Sat 9/5
6:02 pm-11:22 pm
1 stop8h 20m
$526
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 5/28
2:27 pm-12:09 am
1 stop6h 42m
Knoxville McGhee Tyson
Wed 6/3
6:00 am-4:47 pm
2 stops13h 47m
$541
Cheapest one-way
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 5/28
12:35 pm-7:24 pm
1 stop27h 49m
$192
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 6/10
5:20 pm-11:59 am
2 stops39h 39m
$194
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 May.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on 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 74 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 $383). Flying from Portland to Knoxville in March is currently the most expensive (average of $582). 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 May 14, 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
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
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Top 4 airlines flying from Portland to Knoxville
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$468 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$264 | Average$343 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$279 | Average$498 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$304 | Average$457 | FlexibilityNo cancel fee | On-time71% |