HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Knoxville

$178+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TYS
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
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 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 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/25:56 pm
PDX
-
TYS
1 stop16h 48m
Multiple Airlines
Sun 9/67:00 am
TYS
-
PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/20$290
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/33:22 pm
PDX
-
TYS
1 stop18h 49m
Multiple Airlines
Sun 10/116:30 am
TYS
-
PDX
1 stop13h 05m
Multiple Airlines
Deal found 7/23$314
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/265:56 pm
PDX
-
TYS
1 stop16h 53m
Multiple Airlines
Sun 8/307:00 am
TYS
-
PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/22$329
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/193:22 pm
PDX
-
TYS
1 stop19h 22m
Multiple Airlines
Thu 9/247:00 am
TYS
-
PDX
1 stop12h 35m
Multiple Airlines
Deal found 7/20$341
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/193:22 pm
PDX
-
TYS
1 stop19h 22m
Multiple Airlines
Fri 9/251:31 pm
TYS
-
PDX
2 stops30h 04m
Multiple Airlines
Deal found 7/20$344
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/173:22 pm
PDX
-
TYS
2 stops19h 05m
Multiple Airlines
Thu 9/247:00 am
TYS
-
PDX
1 stop12h 35m
Multiple Airlines
Deal found 7/20$345
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/2212:20 pm
PDX
-
TYS
1 stop22h 29m
Multiple Airlines
Sat 8/291:54 pm
TYS
-
PDX
2 stops30h 17m
Multiple Airlines
Deal found 7/23$351
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/163:22 pm
PDX
-
TYS
1 stop19h 22m
Multiple Airlines
Mon 9/218:00 am
TYS
-
PDX
2 stops33h 27m
Multiple Airlines
Deal found 7/20$353
This American Airlines deal was found by Cheapflights users on 7/22. 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 9/126:00 am
PDX
-
TYS
1 stop7h 42m
American Airlines
Tue 9/222:43 pm
TYS
-
PDX
1 stop7h 37m
American Airlines
Deal found 7/22$355
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 8/145:36 pm
PDX
-
TYS
2 stops25h 27m
Multiple Airlines
Sun 8/237:00 am
TYS
-
PDX
1 stop13h 11m
Multiple Airlines
Deal found 7/24$357
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/163:22 pm
PDX
-
TYS
1 stop19h 22m
Multiple Airlines
Thu 9/247:00 am
TYS
-
PDX
1 stop12h 35m
Multiple Airlines
Deal found 7/20$358

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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$290
(Kiwi.com)

One-way from

$178
(United Airlines)

Popular in

May

Cheapest in

August

Average price

$585
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. 7% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 24, 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

Price

Cheapest round-trip

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 8/20

10:50 am-10:29 pm

1 stop8h 39m

Knoxville McGhee Tyson

Mon 8/24

6:02 pm-10:52 pm

1 stop7h 50m

$355

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 9/28

11:30 pm-12:05 pm

2 stops9h 35m

Knoxville McGhee Tyson

Wed 9/30

7:00 am-3:00 pm

2 stops11h 00m

$366

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 8/18

5:50 am-6:55 pm

2 stops10h 05m

Knoxville McGhee Tyson

Tue 8/25

3:00 pm-10:15 pm

1 stop10h 15m

$366

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 8/20

6:05 am-3:55 pm

1 stop6h 50m

Knoxville McGhee Tyson

Mon 8/24

5:45 pm-11:40 pm

2 stops8h 55m

$415

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 10/6

6:30 am-3:40 pm

1 stop6h 10m

Knoxville McGhee Tyson

Thu 10/15

5:30 pm-1:20 am

2 stops10h 50m

$418

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Thu 10/15

11:10 pm-10:17 am

1 stop8h 07m

Knoxville McGhee Tyson

Mon 10/26

5:18 pm-9:58 pm

1 stop7h 40m

$437
Quickest round-trip

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Tue 8/25

11:02 pm-9:57 am

1 stop7h 55m

Knoxville McGhee Tyson

Sat 8/29

4:50 pm-9:05 pm

1 stop7h 15m

$465

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Sat 10/3

10:43 am-8:49 pm

1 stop7h 06m

Knoxville McGhee Tyson

Sat 10/10

6:00 am-2:27 pm

2 stops11h 27m

$470

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Mon 9/28

11:30 pm-2:42 pm

2 stops12h 12m

Knoxville McGhee Tyson

Wed 9/30

9:45 am-9:10 pm

2 stops14h 25m

$475
Cheapest one-way
Quickest one-way

PortlandKnoxville

PDX - TYS

PDXTYS

Portland

Wed 8/12

12:45 pm-10:29 pm

1 stop6h 44m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Showing 1-10 of 18 resultsSorted by cheapest first
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 July.
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?

The best time to book flights from Portland to Knoxville is 38 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 $412). Flying from Portland to Knoxville in May is currently the most expensive (average of $611). 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 $380 and $576 in September.
The cheapest round-trip price found within the last 5 days was $290 on Multiple Airlines (Sep 2-Sep 6).

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 24, 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.
Delta
7.8
Good
8,481 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,481 reviews
Delta
7.8
Good
8,481 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,026 reviews
Delta
7.8
Good
8,481 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,842 reviews
Delta
7.8
Good
8,481 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 $355, United Airlines can have you in Knoxville from Portland in 8h 39m. 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 $268. Other airlines that can offer you cheap pricing are American Airlines, from $304, and United Airlines, from $329. Delta is 45% 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 American Airlines, with whom users have recently found tickets for as low as $125. However, be on the lookout for offers from United 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, August is the cheapest month in which you can book a flight from Portland to Knoxville (average of $412). Flying from Portland to Knoxville in May is currently the most expensive (average of $611). 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
Morristown
Bryson City
Murphy
Alcoa

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.

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 2,558,603 searches. Data last updated July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$268Average$497FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$304Average$474FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$329Average$526FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights