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$126+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Knoxville McGhee Tyson are usually found in February or January, booked 39 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap 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 August 13, 2025.

Round-trip from

$247
(Priceline)

One-way from

$126
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$418
From Portland to Knoxville McGhee Tyson
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One-way flight from Portland to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 13, 2025.

This Priceline deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:05 amPDX - TYS
1 stop10h 40mFrontier
Thu 9/118:40 pmTYS - PDX
1 stop6h 32mFrontier
Deal found 8/12$247
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/95:38 amPDX - TYS
1 stop7h 03mAmerican Airlines
Tue 9/166:00 amTYS - PDX
1 stop8h 14mAmerican Airlines
Deal found 8/13$251
This Priceline deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:05 amPDX - TYS
1 stop10h 40mFrontier
Mon 9/228:35 pmTYS - PDX
1 stop6h 37mFrontier
Deal found 8/12$255
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1011:42 amPDX - TYS
1 stop9h 39mAmerican Airlines
Tue 9/166:00 amTYS - PDX
2 stops10h 16mAmerican Airlines
Deal found 8/13$256
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:22 pmPDX - TYS
1 stop24h 08mMultiple Airlines
Mon 9/298:30 amTYS - PDX
1 stop12h 57mMultiple Airlines
Deal found 8/13$261
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:51 amPDX - TYS
1 stop27h 52mMultiple Airlines
Sun 9/77:00 amTYS - PDX
1 stop20h 12mMultiple Airlines
Deal found 8/12$264
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:51 amPDX - TYS
1 stop27h 52mMultiple Airlines
Mon 9/88:30 amTYS - PDX
1 stop13h 53mMultiple Airlines
Deal found 8/11$277
This Priceline deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:27 amPDX - TYS
1 stop10h 14mFrontier
Sun 8/248:33 pmTYS - PDX
1 stop6h 42mFrontier
Deal found 8/13$284

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 August 13, 2025.
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

Mon 9/8

6:05 am-7:45 pm

1 stop10h 40m

Knoxville McGhee Tyson

Thu 9/11

8:40 pm-12:12 am

1 stop6h 32m

$247

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/10

8:15 am-8:56 pm

1 stop9h 41m

Knoxville McGhee Tyson

Sat 9/20

10:54 am-3:25 pm

1 stop7h 31m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Sat 10/4

5:38 am-3:41 pm

1 stop7h 03m

Knoxville McGhee Tyson

Sat 10/11

6:47 pm-11:29 pm

1 stop7h 42m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/3

5:00 am-3:10 pm

1 stop7h 10m

Knoxville McGhee Tyson

Sat 9/6

2:00 pm-6:31 pm

1 stop7h 31m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/24

2:05 pm-12:21 am

1 stop7h 16m

Knoxville McGhee Tyson

Sat 9/27

7:14 am-2:33 pm

1 stop10h 19m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/10

11:42 am-12:21 am

1 stop9h 39m

Knoxville McGhee Tyson

Tue 9/16

6:00 am-11:14 am

1 stop8h 14m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 9/15

6:05 am-7:45 pm

1 stop10h 40m

Knoxville McGhee Tyson

Mon 9/22

8:35 pm-12:12 am

1 stop6h 37m

$255

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 9/25

7:22 pm-10:30 pm

1 stop24h 08m

Knoxville McGhee Tyson

Mon 9/29

8:30 am-6:27 pm

1 stop12h 57m

$261

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/3

5:38 am-6:50 pm

2 stops10h 12m

Knoxville McGhee Tyson

Sat 9/6

11:18 am-6:54 pm

2 stops10h 36m

$261

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 9/3

5:00 am-3:10 pm

1 stop7h 10m

$126

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 20 results
1
2

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 August 8, 2025.

The best time to book flights from Portland to Knoxville is 39 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 $294). Flying from Portland to Knoxville in March is currently the most expensive (average of $376). 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.

What is the cheapest time of day to fly from PDX to TYS?

Find hourly flight availability from Portland to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 13, 2025.

When flying from Portland to Knoxville, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 4% versus a flight in the afternoon.

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 August 13, 2025.
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
8.0
Very good
7,979 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,920 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,221 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Cheapflights users have booked flights from Portland to Knoxville round-trip from $247. Another airline that can offer you cheap pricing is United Airlines. Frontier is 47% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, January is the cheapest month in which you can book a flight from Portland to Knoxville (average of $294). Flying from Portland to Knoxville in March is currently the most expensive (average of $376). 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
Morristown
Cherokee
Corbin
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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$157Average$267FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$278Average$517FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$291Average$463FlexibilityNo cancel feeOn-time71%
DeltaCheapest$308Average$457FlexibilityNo cancel feeOn-timeN/A

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