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$82+ 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Knoxville McGhee Tyson are usually found in February or September, booked 88 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 July 1, 2025.

Round-trip from

$189
(Priceline)

One-way from

$82
(Priceline)

Popular in

December

Cheapest in

February

Average price

$458
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 ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Priceline deal was found by Cheapflights users on 7/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/316:35 amPDX - TYS
1 stop6h 54mFrontier
Thu 8/75:25 pmTYS - PDX
1 stop9h 51mFrontier
Deal found 7/1$246
This American Airlines deal was found by Cheapflights users on 6/30. 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.
Mon 7/2812:59 amPDX - TYS
1 stop9h 13mAmerican Airlines
Tue 8/56:29 pmTYS - PDX
1 stop7h 35mAmerican Airlines
Deal found 6/30$251
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2911:11 pmPDX - TYS
2 stops11h 40mDelta
Tue 8/56:15 pmTYS - PDX
1 stop8h 03mDelta
Deal found 6/30$256
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/223:10 pmPDX - TYS
2 stops17h 40mMultiple Airlines
Fri 7/2511:01 amTYS - PDX
1 stop14h 45mMultiple Airlines
Deal found 7/1$328
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Fri 8/111:59 pmPDX - TYS
2 stops11h 59mUnited Airlines
Tue 8/59:55 amTYS - PDX
2 stops11h 50mUnited Airlines
Deal found 6/30$390
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/164:26 pmPDX - TYS
2 stops19h 43mAllegiant Air
Sun 7/207:10 amTYS - PDX
2 stops27h 22mAllegiant Air
Deal found 7/1$401

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 July 1, 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

Thu 9/18

6:05 am-7:41 pm

1 stop10h 36m

Knoxville McGhee Tyson

Sun 9/21

8:26 pm-12:12 am

1 stop6h 46m

$189

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 7/28

12:59 am-1:12 pm

1 stop9h 13m

Knoxville McGhee Tyson

Tue 8/5

6:29 pm-11:04 pm

1 stop7h 35m

$251

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 7/29

11:11 pm-1:51 pm

2 stops11h 40m

Knoxville McGhee Tyson

Tue 8/5

6:15 pm-11:18 pm

1 stop8h 03m

$256

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 8/14

7:52 pm-1:39 pm

1 stop14h 47m

Knoxville McGhee Tyson

Mon 8/18

6:00 am-6:57 pm

3 stops15h 57m

$340

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Fri 8/1

11:59 pm-2:58 pm

2 stops11h 59m

Knoxville McGhee Tyson

Tue 8/5

9:55 am-6:45 pm

2 stops11h 50m

$390

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 7/16

4:26 pm-3:09 pm

2 stops19h 43m

Knoxville McGhee Tyson

Sun 7/20

7:10 am-7:32 am

2 stops27h 22m

$401

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Sun 7/6

6:35 am-4:29 pm

1 stop6h 54m

$82

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 8/4

12:59 am-11:41 am

1 stop7h 42m

$126

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 8/4

12:40 am-3:07 pm

2 stops11h 27m

$131

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 7/31

3:10 pm-5:12 pm

2 stops23h 02m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 12 results
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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 June 27, 2025.

The best time to book flights from Portland to Knoxville is 88 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 $296). 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 July 1, 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 July 1, 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
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,974 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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
8,858 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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!
Allegiant Air
7.2
Good
710 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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
5.9
Fair
3,289 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

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 $189. Other airlines that can offer you cheap pricing are American Airlines, from $251, and Delta, from $256. Frontier is 59% 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 $82. 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, January is the cheapest month in which you can book a flight from Portland to Knoxville (average of $296). 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 Portland?

Book flights to Portland 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$168Average$301FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$279Average$510FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$293Average$464FlexibilityNo cancel feeOn-time71%
DeltaCheapest$308Average$449FlexibilityNo cancel feeOn-timeN/A

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