$114+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Jun 1 — Jun 81
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
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
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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 2, 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 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 8/66:59 pm
PDX
- TYS
1 stop15h 58m
Multiple Airlines
Sun 8/97:00 am
TYS
- PDX
1 stop12h 53m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$327
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 9/157:13 am
PDX
- TYS
1 stop7h 52m
United Airlines
Wed 9/235:57 pm
TYS
- PDX
1 stop8h 12m
United Airlines
Deal found 4/28![United Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:35 pm
PDX
- TYS
1 stop27h 49m
Multiple Airlines
Thu 6/41:22 pm
TYS
- PDX
2 stops27h 57m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 9/158:40 am
PDX
- TYS
2 stops9h 50m
United Airlines
Tue 9/224:56 pm
TYS
- PDX
1 stop6h 59m
United Airlines
Deal found 4/28![United Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:43 pm
PDX
- TYS
1 stop8h 30m
American Airlines
Tue 6/236:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 4/30![American Airlines logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:20 pm
PDX
- TYS
1 stop17h 32m
Multiple Airlines
Sat 7/46:00 am
TYS
- PDX
2 stops34h 58m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$388
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:10 am
PDX
- TYS
1 stop8h 33m
American Airlines
Wed 6/36:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 4/30![American Airlines logo]()
$390
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:35 pm
PDX
- TYS
1 stop22h 24m
Multiple Airlines
Sat 6/65:56 pm
TYS
- PDX
2 stops19h 24m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$395
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:26 pm
PDX
- TYS
1 stop22h 25m
Multiple Airlines
Sat 7/186:00 am
TYS
- PDX
2 stops29h 07m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Mon 6/15:57 pm
TYS
- PDX
1 stop8h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$403
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 2, 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 2, 2026.
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3011:45 pm
PDX
- TYS
1 stop7h 20m
United Airlines
Wed 6/31:35 pm
TYS
- PDX
1 stop10h 49m
United Airlines
Deal found 4/30![United Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:10 am
PDX
- TYS
2 stops10h 10m
Southwest
Sun 7/58:00 am
TYS
- PDX
1 stop9h 20m
Southwest
Deal found 5/2![Southwest logo]()
$612
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:39 pm
PDX
- TYS
1 stop8h 55m
Delta
Tue 5/195:20 pm
TYS
- PDX
1 stop7h 42m
Delta
Deal found 4/28![Delta logo]()
$618
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Thu 5/2811:40 pm
PDX
- TYS
1 stop7h 25m
United Airlines
Wed 6/35:45 am
TYS
- PDX
2 stops13h 12m
United Airlines
Deal found 5/2![United Airlines logo]()
$505
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 5/3011:05 am
PDX
- TYS
1 stop8h 14m
United Airlines
Sat 6/610:00 am
TYS
- PDX
2 stops15h 31m
United Airlines
Deal found 4/28![United Airlines logo]()
$520
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:50 pm
PDX
- TYS
2 stops12h 52m
United Airlines
Mon 6/15:57 pm
TYS
- PDX
1 stop8h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$531
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 7/610:40 pm
PDX
- TYS
2 stops12h 47m
United Airlines
Fri 7/105:55 pm
TYS
- PDX
1 stop9h 07m
United Airlines
Deal found 4/28![United Airlines logo]()
$572
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated May 2, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated May 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 5/2011:40 pm
PDX
- TYS
1 stop8h 33m
American Airlines
Tue 5/266:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 4/28![American Airlines logo]()
$444
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2211:43 pm
PDX
- TYS
1 stop8h 30m
American Airlines
Thu 5/285:33 pm
TYS
- PDX
1 stop10h 17m
American Airlines
Deal found 4/30![American Airlines logo]()
$461
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 5/229:22 am
PDX
- TYS
2 stops21h 45m
Multiple Airlines
Sun 5/247:00 am
TYS
- PDX
1 stop12h 46m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:30 pm
PDX
- TYS
1 stop8h 12m
United Airlines
Mon 6/15:57 pm
TYS
- PDX
1 stop8h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 5/2611:40 pm
PDX
- TYS
1 stop7h 25m
United Airlines
Fri 5/295:41 pm
TYS
- PDX
1 stop8h 06m
United Airlines
Deal found 4/28![United Airlines logo]()
$416
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:35 pm
PDX
- TYS
1 stop27h 49m
Multiple Airlines
Thu 6/41:22 pm
TYS
- PDX
2 stops27h 57m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:10 am
PDX
- TYS
1 stop8h 33m
American Airlines
Wed 6/36:07 pm
TYS
- PDX
1 stop8h 52m
American Airlines
Deal found 4/30![American Airlines logo]()
$390
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/291:34 pm
PDX
- TYS
1 stop7h 22m
American Airlines
Mon 6/16:20 pm
TYS
- PDX
1 stop8h 32m
American Airlines
Deal found 4/30![American Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Fri 5/299:22 am
PDX
- TYS
2 stops21h 45m
Multiple Airlines
Mon 6/18:32 pm
TYS
- PDX
1 stop23h 29m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$497
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:35 pm
PDX
- TYS
1 stop22h 24m
Multiple Airlines
Sat 6/65:56 pm
TYS
- PDX
2 stops19h 24m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3011:05 am
PDX
- TYS
1 stop8h 14m
United Airlines
Sat 6/64:56 pm
TYS
- PDX
1 stop7h 19m
United Airlines
Deal found 4/29![United Airlines logo]()
$405
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 2, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated May 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:42 pm
PDX
- TYS
1 stop22h 55m
Frontier
Deal found 4/30![Frontier logo]()
$114
This Booking.com deal was found by Cheapflights users on 5/1. 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 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 5/1![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Sat 6/612:35 pm
PDX
- TYS
2 stops45h 19m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:35 pm
PDX
- TYS
1 stop27h 49m
Frontier
Deal found 4/29![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Thu 6/42:38 pm
PDX
- TYS
3 stops28h 12m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:35 pm
PDX
- TYS
3 stops25h 05m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$186
This Delta deal was found by Cheapflights users on 5/2. 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.
Wed 6/311:12 pm
PDX
- TYS
1 stop8h 09m
Delta
Deal found 5/2![Delta logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/212:44 pm
PDX
- TYS
3 stops40h 23m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$197
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Sun 5/3112:40 am
PDX
- TYS
1 stop7h 33m
American Airlines
Deal found 5/1![American Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 8/1312:26 pm
PDX
- TYS
2 stops20h 51m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$211
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 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $327 (Kiwi.com) |
One-way from | $131 (Booking.com) |
Popular in | March |
Cheapest in | August |
Average price | $507 |
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 2, 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
Sat 5/30
11:45 pm-10:05 am
1 stop7h 20m
Knoxville McGhee Tyson
Wed 6/3
1:35 pm-9:24 pm
1 stop10h 49m
$500
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Thu 5/28
11:40 pm-10:05 am
1 stop7h 25m
Knoxville McGhee Tyson
Wed 6/3
5:45 am-3:57 pm
2 stops13h 12m
$505
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 5/30
11:05 am-10:19 pm
1 stop8h 14m
Knoxville McGhee Tyson
Sat 6/6
10:00 am-10:31 pm
2 stops15h 31m
$520
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 5/27
6:50 pm-10:42 am
2 stops12h 52m
Knoxville McGhee Tyson
Mon 6/1
5:57 pm-11:53 pm
1 stop8h 56m
$531
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 7/6
10:40 pm-2:27 pm
2 stops12h 47m
Knoxville McGhee Tyson
Fri 7/10
5:55 pm-12:02 am
1 stop9h 07m
$572
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Wed 7/1
5:10 am-6:20 pm
2 stops10h 10m
Knoxville McGhee Tyson
Sun 7/5
8:00 am-2:20 pm
1 stop9h 20m
$612
Quickest round-trip
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Tue 5/12
9:39 pm-9:34 am
1 stop8h 55m
Knoxville McGhee Tyson
Tue 5/19
5:20 pm-10:02 pm
1 stop7h 42m
$618
Cheapest one-way
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Sat 6/6
12:35 pm-8:27 pm
3 stops52h 52m
$180
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Fri 6/5
10:34 am-10:53 pm
2 stops33h 19m
$215
PortlandKnoxville
PDX - TYS
PDXTYS
Portland
Mon 6/1
10:31 am-10:41 am
2 stops21h 10m
$221
Showing 1-10 of 19 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 2, 2026.
Read through reviews of airlines operating flights from Portland to Knoxville, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - 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.
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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 May 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$448 | 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$303 | Average$455 | FlexibilityNo cancel fee | On-time71% |