$182+ Cheap flights from Portland to Knoxville (PDX - TYS)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Dec 9 — Dec 161
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
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 November 9, 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 November 9, 2026.
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:58 am -
1 stop6h 19m
Wed 12/25:10 pm -
1 stop7h 57m
Deal found 11/4![Delta logo]()
$363
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/35:00 am -
1 stop6h 40m
Mon 12/76:00 am -
2 stops11h 38m
Deal found 11/5![United Airlines logo]()
$368
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 12/71:30 pm -
1 stop6h 56m
Wed 12/912:19 pm -
2 stops10h 36m
Deal found 11/5![American Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 11/8. 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 12/510:00 pm -
1 stop7h 54m
Sat 12/127:44 am -
1 stop7h 53m
Deal found 11/8![American Airlines logo]()
$382
This Delta deal was found by Cheapflights users on 11/8. 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 12/211:59 am -
1 stop8h 25m
Wed 12/94:01 pm -
1 stop8h 57m
Deal found 11/8![Delta logo]()
$385
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Wed 12/25:00 am -
1 stop8h 39m
Wed 12/912:19 pm -
2 stops10h 36m
Deal found 11/9![American Airlines logo]()
$396
This Southwest deal was found by Cheapflights users on 11/5. 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.
Wed 12/3011:30 pm -
2 stops9h 50m
Tue 1/54:15 pm -
1 stop9h 05m
Deal found 11/5![Southwest logo]()
$423
This Southwest deal was found by Cheapflights users on 11/8. 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 12/56:55 am -
1 stop6h 15m
Sat 12/127:10 am -
2 stops10h 30m
Deal found 11/8![Southwest logo]()
$430
This Southwest deal was found by Cheapflights users on 11/5. 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.
Thu 12/36:30 am -
2 stops10h 20m
Mon 12/77:05 am -
2 stops9h 05m
Deal found 11/5![Southwest logo]()
$435
This Southwest deal was found by Cheapflights users on 11/4. 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.
Thu 11/266:15 am -
2 stops9h 00m
Wed 12/24:15 pm -
1 stop9h 05m
Deal found 11/4![Southwest logo]()
$446
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 November 9, 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 November 9, 2026.
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:58 am -
1 stop6h 19m
Wed 12/25:10 pm -
1 stop7h 57m
Deal found 11/4![Delta logo]()
$363
This United Airlines deal was found by Cheapflights users on 11/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/710:43 am -
1 stop7h 04m
Wed 12/96:00 am -
2 stops11h 38m
Deal found 11/4![United Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 11/5. 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.
Wed 12/3011:30 pm -
2 stops9h 50m
Tue 1/54:15 pm -
1 stop9h 05m
Deal found 11/5![Southwest logo]()
$423
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Wed 12/211:13 pm -
2 stops11h 00m
Wed 12/912:19 pm -
2 stops10h 36m
Deal found 11/9![American Airlines logo]()
$457
This Southwest deal was found by Cheapflights users on 11/8. 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 2/146:55 am -
1 stop6h 00m
Wed 2/172:40 pm -
2 stops10h 00m
Deal found 11/8![Southwest logo]()
$446
This United Airlines deal was found by Cheapflights users on 11/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:00 am -
1 stop7h 00m
Sat 12/127:05 am -
1 stop8h 12m
Deal found 11/4![United Airlines logo]()
$493
This Southwest deal was found by Cheapflights users on 11/4. 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.
Thu 11/266:15 am -
2 stops9h 00m
Wed 12/27:05 am -
2 stops9h 05m
Deal found 11/4![Southwest logo]()
$451
This Delta deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/39:45 pm -
1 stop8h 27m
Sun 5/95:30 am -
1 stop8h 26m
Deal found 11/7![Delta logo]()
$497
This United Airlines deal was found by Cheapflights users on 11/6. 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 3/45:15 am -
1 stop7h 36m
Mon 3/85:20 pm -
1 stop8h 53m
Deal found 11/6![United Airlines logo]()
$497
This Southwest deal was found by Cheapflights users on 11/6. 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 3/410:20 am -
2 stops10h 10m
Mon 3/83:50 pm -
2 stops12h 15m
Deal found 11/6![Southwest logo]()
$507
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated November 9, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated November 9, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:58 am -
1 stop6h 19m
Wed 12/25:10 pm -
1 stop7h 57m
Deal found 11/4![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 11/4. 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.
Thu 11/266:15 am -
2 stops9h 00m
Wed 12/24:15 pm -
1 stop9h 05m
Deal found 11/4![Southwest logo]()
$446
This Delta deal was found by Cheapflights users on 11/8. 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 12/211:59 am -
1 stop8h 25m
Wed 12/94:01 pm -
1 stop8h 57m
Deal found 11/8![Delta logo]()
$385
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Wed 12/25:00 am -
1 stop8h 39m
Wed 12/912:19 pm -
2 stops10h 36m
Deal found 11/9![American Airlines logo]()
$396
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/35:00 am -
1 stop6h 40m
Mon 12/76:00 am -
2 stops11h 38m
Deal found 11/5![United Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 11/5. 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.
Thu 12/36:30 am -
2 stops10h 20m
Mon 12/77:05 am -
2 stops9h 05m
Deal found 11/5![Southwest logo]()
$435
This American Airlines deal was found by Cheapflights users on 11/8. 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 12/510:00 pm -
1 stop7h 54m
Sat 12/127:44 am -
1 stop7h 53m
Deal found 11/8![American Airlines logo]()
$382
This Southwest deal was found by Cheapflights users on 11/8. 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 12/56:55 am -
1 stop6h 15m
Sat 12/127:10 am -
2 stops10h 30m
Deal found 11/8![Southwest logo]()
$430
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 12/71:30 pm -
1 stop6h 56m
Wed 12/912:19 pm -
2 stops10h 36m
Deal found 11/5![American Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 11/5. 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.
Wed 12/3011:30 pm -
2 stops9h 50m
Tue 1/54:15 pm -
1 stop9h 05m
Deal found 11/5![Southwest logo]()
$423
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 November 9, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated November 9, 2026.
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2412:00 pm -
1 stop6h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Delta logo]()
$182
This American Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/95:00 am -
1 stop8h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![American Airlines logo]()
$193
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/910:43 am -
2 stops10h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![United Airlines logo]()
$198
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Thu 12/2411:59 pm -
2 stops9h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![American Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 11/6. 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.
Tue 3/239:45 pm -
1 stop8h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Delta logo]()
$249
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Tue 3/2311:55 pm -
2 stops10h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![American Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Sun 11/226:29 pm -
2 stops26h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Multiple Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 11/5. 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.
Thu 4/19:05 pm -
2 stops15h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Southwest logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Thu 12/241:04 pm -
3 stops43h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Multiple Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:51 am -
1 stop7h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 11/2311:30 pm -
2 stops9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![United Airlines logo]()
$324
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 November 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (United Airlines) |
One-way from | $182 (Delta) |
Popular in | November |
Cheapest in | January |
Average price | $810 |
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 7,457,451 searches. Data last updated November 9, 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 Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Thu 12/24
12:00 pm-9:30 pm
1 stop6h 30m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$182
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Wed 12/9
5:00 am-4:39 pm
1 stop8h 39m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$193
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Wed 12/9
10:43 am-11:59 pm
2 stops10h 16m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$198
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Thu 12/24
11:59 pm-12:31 pm
2 stops9h 32m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$241
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Tue 3/23
9:45 pm-9:12 am
1 stop8h 27m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$249
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Tue 3/23
11:55 pm-11:07 am
1 stop8h 12m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$249
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Thu 4/1
6:04 am-4:08 pm
1 stop7h 04m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$249
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Sun 11/22
6:29 pm-11:29 pm
2 stops26h 00m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$265
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Thu 11/26
11:58 am-9:17 pm
1 stop6h 19m
Knoxville McGhee Tyson
Wed 12/2
5:10 pm-10:07 pm
1 stop7h 57m
$363
PortlandKnoxville
PDX Portland - TYS Knoxville McGhee Tyson
PDXTYS
Portland
Mon 12/7
10:43 am-8:47 pm
1 stop7h 04m
Knoxville McGhee Tyson
Wed 12/9
6:00 am-2:38 pm
2 stops11h 38m
$368
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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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 32 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, January is the cheapest month in which you can book a flight from Portland to Knoxville (average of $435). Flying from Portland to Knoxville in November is currently the most expensive (average of $810). 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 $483 and $875 in December.The cheapest round-trip price found within the last 5 days was $363 on United Airlines (Dec 3-Dec 7).
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 November 9, 2026.
Read through reviews of airlines operating flights from Portland to Knoxville, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
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
Newport
Bryson City
Crossville
Morristown
Murphy
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Knoxville flight routes
Other flight options
Other flights from Portland
Popular flights
Alternative routes for Portland to Knoxville
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Knoxville by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Knoxville by cabin class
Find flights from Portland to Knoxville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 November 9, 2026.
Portland and Knoxville flights
Browse other Portland and Knoxville flight options. Last updated on November 9, 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 November 9, 2026.
Popular flight searches
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 7,457,451 searches. Data last updated November 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$279 | Average$508 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$345 | Average$484 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$358 | Average$540 | FlexibilityNo cancel fee | On-time69% |