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Knoxville

$133+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Portland to Knoxville

Cheapest flights from Portland to Knoxville
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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. 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 3/37:10 am
PDX
-
TYS
1 stop8h 00m
United Airlines
Tue 3/102:21 pm
TYS
-
PDX
1 stop10h 37m
United Airlines
Deal found 1/28$359
This United Airlines deal was found by Cheapflights users on 1/29. 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 2/2511:59 pm
PDX
-
TYS
1 stop7h 13m
United Airlines
Sat 2/286:45 am
TYS
-
PDX
1 stop8h 10m
United Airlines
Deal found 1/29$363
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Tue 3/311:35 pm
PDX
-
TYS
2 stops9h 22m
American Airlines
Tue 3/1012:21 pm
TYS
-
PDX
2 stops11h 46m
American Airlines
Deal found 1/28$370
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1811:40 pm
PDX
-
TYS
1 stop9h 50m
American Airlines
Tue 4/217:33 pm
TYS
-
PDX
1 stop7h 08m
American Airlines
Deal found 1/27$372
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/259:20 am
PDX
-
TYS
2 stops10h 52m
Delta
Sat 2/281:30 pm
TYS
-
PDX
2 stops12h 18m
Delta
Deal found 1/29$374
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:08 pm
PDX
-
TYS
1 stop16h 48m
American Airlines
Sat 4/257:50 am
TYS
-
PDX
1 stop17h 42m
American Airlines
Deal found 1/27$375
This Delta deal was found by Cheapflights users on 1/28. 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.
Sat 4/1811:15 pm
PDX
-
TYS
1 stop8h 06m
Delta
Tue 4/2112:03 pm
TYS
-
PDX
2 stops11h 02m
Delta
Deal found 1/28$377
This Delta deal was found by Cheapflights users on 1/28. 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.
Mon 4/2712:30 am
PDX
-
TYS
2 stops13h 12m
Delta
Sat 5/27:50 am
TYS
-
PDX
2 stops12h 42m
Delta
Deal found 1/28$383
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:59 pm
PDX
-
TYS
1 stop7h 57m
American Airlines
Sat 5/23:58 pm
TYS
-
PDX
1 stop8h 01m
American Airlines
Deal found 1/27$385

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$359
(United Airlines)

One-way from

$133
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$414
Provider with most accurate pricing for Portland-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Knoxville McGhee Tyson flights.
Search Deals
From Portland to Knoxville McGhee Tyson
Search Deals
One-way flight from Portland to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
Use the filters below to find and compare flights from Portland to Knoxville that are best for you.

Fly from

Portland

Fly to

Knoxville

Route

Depart

Return

Price

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 2/25

11:59 pm-10:12 am

1 stop7h 13m

Knoxville McGhee Tyson

Sat 2/28

6:45 am-11:55 am

1 stop8h 10m

$363

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 3/3

5:05 am-3:05 pm

1 stop7h 00m

Knoxville McGhee Tyson

Tue 3/10

7:00 am-1:44 pm

2 stops9h 44m

$364

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 2/25

6:00 am-8:55 pm

2 stops11h 55m

Knoxville McGhee Tyson

Sat 2/28

5:35 am-10:52 am

1 stop8h 17m

$368

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 4/28

7:00 am-6:04 pm

1 stop8h 04m

Knoxville McGhee Tyson

Sat 5/2

5:06 pm-11:41 pm

1 stop9h 35m

$372

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 4/28

11:15 pm-10:21 am

1 stop8h 06m

Knoxville McGhee Tyson

Sat 5/2

7:50 am-5:32 pm

2 stops12h 42m

$377

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Sat 4/18

1:55 pm-11:56 pm

1 stop7h 01m

Knoxville McGhee Tyson

Sat 4/25

3:58 pm-10:32 pm

2 stops9h 34m

$390

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 4/16

11:15 pm-10:21 am

1 stop8h 06m

Knoxville McGhee Tyson

Tue 4/21

5:54 pm-10:02 pm

1 stop7h 08m

$399

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Fri 5/1

11:40 pm-12:30 pm

1 stop9h 50m

Knoxville McGhee Tyson

Mon 5/4

7:33 pm-11:41 pm

1 stop7h 08m

$411

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 5/20

1:48 pm-1:59 pm

1 stop21h 11m

$133

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 5/12

12:40 am-3:06 pm

2 stops11h 26m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 14 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Knoxville. Price data was last updated on January 23, 2026.

The best time to book flights from Portland to Knoxville is 23 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, July is the cheapest month in which you can book a flight from Portland to Knoxville (average of $128). Flying from Portland to Knoxville in May is currently the most expensive (average of $285). 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.

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 January 29, 2026.
Read through reviews of airlines operating flights from Portland to Knoxville, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,127 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,215 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,206 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.7
Fair
3,056 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

  • How long is the flight from Portland to Knoxville?

    For as low as $363, United Airlines can have you in Knoxville from Portland in 7h 13m. There are 2107 mi between Portland and Knoxville. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Portland to Knoxville round-trip?

    Cheapflights users have booked flights from Portland to Knoxville round-trip from $240. Other airlines that can offer you cheap pricing are United Airlines, from $248, and Delta, from $278. Frontier is 46% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Portland to Knoxville one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $107. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Portland to Knoxville for a low price.

  • Can I find deals for flights from Portland to Knoxville that include hotel bookings?

    Yes. In addition to deals on Portland to Knoxville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Knoxville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Knoxville.

  • Can I find deals for business class flights from Portland to Knoxville?

    Yes. Cheapflights offers flight deals from Portland to Knoxville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Knoxville?

    Currently, July is the cheapest month in which you can book a flight from Portland to Knoxville (average of $128). Flying from Portland to Knoxville in May is currently the most expensive (average of $285). 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.

See more FAQs

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Oak Ridge
Murphy

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$240Average$326FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$248Average$465FlexibilityNo cancel feeOn-time69%
DeltaCheapest$278Average$428FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$293Average$460FlexibilityNo cancel feeOn-time71%

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