$136+ 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
juil. 6 — juil. 131
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 juin 6, 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 juin 6, 2026.
This American Airlines deal was found by Cheapflights users on 6/1. 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.
sam. 9/126:00 am
PDX
- TYS
1 stop7h 42m
American Airlines
mar. 9/225:35 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/1![American Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 6/1. 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.
sam. 8/2211:58 am
PDX
- TYS
1 stop8h 20m
American Airlines
sam. 8/296:03 am
TYS
- PDX
1 stop7h 51m
American Airlines
Deal found 6/1![American Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 6/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1010:55 pm
PDX
- TYS
1 stop8h 19m
Delta
mar. 11/177:00 am
TYS
- PDX
1 stop9h 25m
Delta
Deal found 6/2![Delta logo]()
$395
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/85:21 pm
PDX
- TYS
2 stops26h 02m
Multiple Airlines
dim. 7/127:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 6/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1011:59 pm
PDX
- TYS
2 stops10h 00m
American Airlines
mar. 11/174:27 pm
TYS
- PDX
1 stop9h 32m
American Airlines
Deal found 6/2![American Airlines logo]()
$400
This American Airlines deal was found by Cheapflights users on 6/5. 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.
mar. 8/410:30 pm
PDX
- TYS
1 stop9h 13m
American Airlines
mar. 8/116:03 am
TYS
- PDX
2 stops10h 49m
American Airlines
Deal found 6/5![American Airlines logo]()
$410
This Booking.com deal was found by Cheapflights users on 6/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/212:26 pm
PDX
- TYS
1 stop28h 11m
Frontier
mer. 7/88:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Deal found 6/2![Frontier logo]()
$414
This American Airlines deal was found by Cheapflights users on 6/5. 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.
mer. 8/511:34 pm
PDX
- TYS
1 stop8h 36m
American Airlines
mer. 8/126:03 am
TYS
- PDX
1 stop7h 51m
American Airlines
Deal found 6/5![American Airlines logo]()
$415
This American Airlines deal was found by Cheapflights users on 6/1. 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.
mar. 10/271:30 pm
PDX
- TYS
1 stop6h 48m
American Airlines
sam. 11/712:08 pm
TYS
- PDX
2 stops10h 41m
American Airlines
Deal found 6/1![American Airlines logo]()
$424
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 juin 6, 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 juin 6, 2026.
This United Airlines deal was found by Cheapflights users on 6/5. 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.
mar. 8/410:40 pm
PDX
- TYS
1 stop8h 03m
United Airlines
mar. 8/114:50 pm
TYS
- PDX
1 stop7h 15m
United Airlines
Deal found 6/5![United Airlines logo]()
$395
This American Airlines deal was found by Cheapflights users on 6/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1011:59 pm
PDX
- TYS
2 stops10h 00m
American Airlines
mar. 11/174:27 pm
TYS
- PDX
1 stop9h 32m
American Airlines
Deal found 6/2![American Airlines logo]()
$400
This Southwest deal was found by Cheapflights users on 6/5. 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.
mer. 8/511:30 pm
PDX
- TYS
2 stops16h 05m
Southwest
mer. 8/123:00 pm
TYS
- PDX
2 stops10h 20m
Southwest
Deal found 6/5![Southwest logo]()
$440
This Delta deal was found by Cheapflights users on 6/1. 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.
dim. 9/2010:55 pm
PDX
- TYS
1 stop7h 44m
Delta
ven. 9/256:20 pm
TYS
- PDX
1 stop7h 47m
Delta
Deal found 6/1![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/311:02 pm
PDX
- TYS
1 stop7h 55m
United Airlines
mar. 9/86:00 pm
TYS
- PDX
1 stop7h 52m
United Airlines
Deal found 6/3![United Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 6/5. 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.
mar. 8/411:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
mar. 8/111:55 pm
TYS
- PDX
2 stops11h 20m
Southwest
Deal found 6/5![Southwest logo]()
$458
This United Airlines deal was found by Cheapflights users on 6/1. 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.
mar. 10/277:10 am
PDX
- TYS
1 stop9h 24m
United Airlines
sam. 11/75:39 pm
TYS
- PDX
1 stop7h 39m
United Airlines
Deal found 6/1![United Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 6/1. 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.
mar. 10/2711:35 pm
PDX
- TYS
2 stops9h 30m
Southwest
sam. 11/77:10 am
TYS
- PDX
2 stops10h 10m
Southwest
Deal found 6/1![Southwest logo]()
$460
This United Airlines deal was found by Cheapflights users on 6/1. 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.
ven. 9/2511:55 pm
PDX
- TYS
1 stop8h 22m
United Airlines
lun. 9/285:05 pm
TYS
- PDX
1 stop8h 47m
United Airlines
Deal found 6/1![United Airlines logo]()
$463
This Southwest deal was found by Cheapflights users on 6/3. 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.
lun. 8/1011:30 pm
PDX
- TYS
2 stops9h 35m
Southwest
jeu. 8/134:50 pm
TYS
- PDX
1 stop7h 20m
Southwest
Deal found 6/3![Southwest logo]()
$476
This United Airlines deal was found by Cheapflights users on 6/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/1711:40 pm
PDX
- TYS
1 stop7h 03m
United Airlines
ven. 7/246:00 am
TYS
- PDX
1 stop8h 38m
United Airlines
Deal found 6/3![United Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 6/5. 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.
mar. 10/208:30 am
PDX
- TYS
1 stop9h 30m
United Airlines
mer. 10/216:00 am
TYS
- PDX
1 stop8h 33m
United Airlines
Deal found 6/5![United Airlines logo]()
$505
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated juin 6, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated juin 6, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/212:26 pm
PDX
- TYS
1 stop28h 11m
Frontier
mer. 7/88:19 pm
TYS
- PDX
1 stop23h 32m
Frontier
Deal found 6/2![Frontier logo]()
$414
This American Airlines deal was found by Cheapflights users on 6/5. 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.
sam. 7/45:49 am
PDX
- TYS
1 stop8h 42m
American Airlines
ven. 7/106:07 pm
TYS
- PDX
1 stop8h 48m
American Airlines
Deal found 6/5![American Airlines logo]()
$426
This American Airlines deal was found by Cheapflights users on 6/4. 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.
lun. 7/612:45 am
PDX
- TYS
1 stop9h 08m
American Airlines
jeu. 7/98:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Deal found 6/4![American Airlines logo]()
$439
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/85:21 pm
PDX
- TYS
2 stops26h 02m
Multiple Airlines
dim. 7/127:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/93:57 pm
PDX
- TYS
2 stops26h 18m
Multiple Airlines
dim. 7/127:00 am
TYS
- PDX
1 stop12h 51m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$456
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/1612:20 pm
PDX
- TYS
1 stop28h 04m
Multiple Airlines
ven. 7/2410:05 pm
TYS
- PDX
2 stops44h 02m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$440
This American Airlines deal was found by Cheapflights users on 6/3. 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.
sam. 7/1811:43 pm
PDX
- TYS
1 stop8h 30m
American Airlines
sam. 7/256:10 pm
TYS
- PDX
1 stop8h 45m
American Airlines
Deal found 6/3![American Airlines logo]()
$459
This American Airlines deal was found by Cheapflights users on 6/4. 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.
mar. 7/2111:41 pm
PDX
- TYS
1 stop8h 32m
American Airlines
dim. 7/268:11 pm
TYS
- PDX
1 stop7h 44m
American Airlines
Deal found 6/4![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 6/3. 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.
jeu. 7/306:39 am
PDX
- TYS
1 stop9h 51m
American Airlines
lun. 8/35:31 pm
TYS
- PDX
1 stop10h 24m
American Airlines
Deal found 6/3![American Airlines logo]()
$457
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 juin 6, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated juin 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
jeu. 9/109:34 pm
PDX
- TYS
1 stop17h 39m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
sam. 10/1712:34 pm
PDX
- TYS
1 stop21h 37m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 8/55:21 pm
PDX
- TYS
2 stops39h 56m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$193
This United Airlines deal was found by Cheapflights users on 6/2. 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.
mer. 8/511:40 pm
PDX
- TYS
1 stop7h 03m
United Airlines
Deal found 6/2![United Airlines logo]()
$198
This Southwest deal was found by Cheapflights users on 6/4. 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.
mar. 10/2711:35 pm
PDX
- TYS
2 stops9h 30m
Southwest
Deal found 6/4![Southwest logo]()
$203
This American Airlines deal was found by Cheapflights users on 6/4. 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.
jeu. 7/231:34 pm
PDX
- TYS
1 stop7h 17m
American Airlines
Deal found 6/4![American Airlines logo]()
$229
This United Airlines deal was found by Cheapflights users on 6/5. 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.
dim. 10/1811:30 pm
PDX
- TYS
1 stop7h 15m
United Airlines
Deal found 6/5![United Airlines logo]()
$234
This Southwest deal was found by Cheapflights users on 6/5. 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.
mer. 8/511:30 pm
PDX
- TYS
2 stops16h 05m
Southwest
Deal found 6/5![Southwest logo]()
$238
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 juin 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $301 (American Airlines) |
One-way from | $136 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $474 |
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 juin 6, 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
mar. 8/4
10:40 pm-9:43 am
1 stop8h 03m
Knoxville McGhee Tyson
mar. 8/11
4:50 pm-9:05 pm
1 stop7h 15m
$395
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
mar. 11/10
11:59 pm-12:59 pm
2 stops10h 00m
Knoxville McGhee Tyson
mar. 11/17
4:27 pm-10:59 pm
1 stop9h 32m
$400
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
jeu. 9/3
11:02 pm-9:57 am
1 stop7h 55m
Knoxville McGhee Tyson
mar. 9/8
6:00 pm-10:52 pm
1 stop7h 52m
$419
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
mar. 10/27
7:10 am-7:34 pm
1 stop9h 24m
Knoxville McGhee Tyson
sam. 11/7
5:39 pm-10:18 pm
1 stop7h 39m
$419
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
mer. 8/5
11:30 pm-6:35 pm
2 stops16h 05m
Knoxville McGhee Tyson
mer. 8/12
3:00 pm-10:20 pm
2 stops10h 20m
$440
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
dim. 9/20
10:55 pm-9:39 am
1 stop7h 44m
Knoxville McGhee Tyson
ven. 9/25
6:20 pm-11:07 pm
1 stop7h 47m
$457
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
mar. 8/4
11:30 pm-12:05 pm
2 stops9h 35m
Knoxville McGhee Tyson
mar. 8/11
1:55 pm-10:15 pm
2 stops11h 20m
$458
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
mar. 10/27
11:35 pm-12:05 pm
2 stops9h 30m
Knoxville McGhee Tyson
sam. 11/7
7:10 am-2:20 pm
2 stops10h 10m
$460
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
ven. 9/25
11:55 pm-11:17 am
1 stop8h 22m
Knoxville McGhee Tyson
lun. 9/28
5:05 pm-10:52 pm
1 stop8h 47m
$463
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
lun. 8/10
11:30 pm-12:05 pm
2 stops9h 35m
Knoxville McGhee Tyson
jeu. 8/13
4:50 pm-9:10 pm
1 stop7h 20m
$476
Showing 1-10 of 21 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 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 $388). Flying from Portland to Knoxville in March is currently the most expensive (average of $569). 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 juin 6, 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.
Crew
8.5
Overall
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
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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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 juin 6, 2026.
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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 juin 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$326 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$268 | Average$478 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$308 | Average$461 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$328 | Average$498 | FlexibilityNo cancel fee | On-time69% |