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$78+ Cheap flights from Knoxville to Portland (TYS - PDX)

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Portland are usually found in August or February, booked 69 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap flight deals from Knoxville to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Portland (PDX). 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 14, 2025.

Round-trip from

$224
(Priceline)

One-way from

$78
(Priceline)

Popular in

December

Cheapest in

August

Average price

$279
From Knoxville McGhee Tyson to Portland
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One-way flight from Knoxville McGhee Tyson to Portland
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Highest demand for flights based on searches. 12% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 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 Knoxville to Portland

Cheapest flights from Knoxville to Portland
Explore the most affordable flight options available from Knoxville to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Priceline deal was found by Cheapflights users on 8/14. 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 8/257:10 pmTYS - PDX
1 stop8h 05mFrontier
Thu 8/286:27 amPDX - TYS
1 stop10h 14mFrontier
Deal found 8/14$224
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/134:49 pmTYS - PDX
1 stop10h 16mAmerican Airlines
Sat 9/205:38 amPDX - TYS
1 stop7h 03mAmerican Airlines
Deal found 8/12$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 9/228:35 pmTYS - PDX
1 stop6h 37mFrontier
Thu 9/256:05 amPDX - TYS
1 stop10h 45mFrontier
Deal found 8/12$277
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/215:08 pmTYS - PDX
1 stop10h 04mFrontier
Mon 9/296:05 amPDX - TYS
1 stop10h 40mFrontier
Deal found 8/14$279
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 9/244:49 pmTYS - PDX
1 stop10h 16mAmerican Airlines
Mon 9/299:56 pmPDX - TYS
1 stop9h 00mAmerican Airlines
Deal found 8/13$280
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:45 amTYS - PDX
2 stops10h 15mDelta
Mon 9/2910:50 pmPDX - TYS
1 stop9h 51mDelta
Deal found 8/12$285
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:37 pmTYS - PDX
1 stop7h 50mAmerican Airlines
Sat 10/1111:59 pmPDX - TYS
1 stop8h 45mAmerican Airlines
Deal found 8/12$295
This American Airlines deal was found by Cheapflights users on 8/14. 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 9/164:49 pmTYS - PDX
1 stop10h 16mAmerican Airlines
Tue 9/235:38 amPDX - TYS
2 stops10h 12mAmerican Airlines
Deal found 8/14$300
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:23 amTYS - PDX
2 stops9h 10mAmerican Airlines
Tue 9/165:38 amPDX - TYS
2 stops10h 12mAmerican Airlines
Deal found 8/12$305

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Portland 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 14, 2025.
Use the filters below to find and compare flights from Knoxville to Portland that are best for you.

Fly from

Knoxville

Fly to

Portland

Route

Depart

Return

Price

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Mon 8/25

7:10 pm-12:15 am

1 stop8h 05m

Portland

Thu 8/28

6:27 am-7:41 pm

1 stop10h 14m

$224

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 9/30

6:00 am-11:14 am

1 stop8h 14m

Portland

Tue 10/7

11:59 pm-11:45 am

1 stop8h 46m

$251

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sat 9/13

2:07 pm-6:54 pm

1 stop7h 47m

Portland

Sat 9/20

2:06 pm-12:21 am

1 stop7h 15m

$251

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 9/16

6:00 am-11:14 am

1 stop8h 14m

Portland

Tue 9/23

9:56 pm-9:56 am

1 stop9h 00m

$251

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 9/30

4:13 pm-11:52 pm

2 stops10h 39m

Portland

Tue 10/7

10:10 pm-9:00 am

1 stop7h 50m

$256

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sun 9/21

5:08 pm-12:12 am

1 stop10h 04m

Portland

Mon 9/29

6:05 am-7:45 pm

1 stop10h 40m

$279

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 9/24

6:00 am-10:52 am

1 stop7h 52m

Portland

Sun 9/28

9:56 pm-9:56 am

1 stop9h 00m

$280

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 9/24

6:00 am-10:52 am

1 stop7h 52m

Portland

Mon 9/29

9:56 pm-9:56 am

1 stop9h 00m

$280

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 9/4

8:40 pm-12:12 am

1 stop6h 32m

$78

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Mon 8/25

7:10 pm-12:15 am

1 stop8h 05m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 15 results
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Best time to book a flight from Knoxville to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Knoxville 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 Knoxville to Portland

How far ahead should I book a flight from Knoxville to Portland?

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Portland. Price data was last updated on August 8, 2025.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Knoxville to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Knoxville to Portland (average of $277). Flying from Knoxville to Portland in March is currently the most expensive (average of $369). 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 TYS to PDX?

Find hourly flight availability from Knoxville to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Knoxville to Portland in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Knoxville to Portland?

Use this chart to determine the cheapest time to fly round-trip from Knoxville to Portland. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Knoxville to Portland flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated August 14, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from Knoxville to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
United Airlines
7.4
Good
8,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Frontier
5.8
Fair
3,217 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Portland. 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 Knoxville to Portland round-trip?

    Frontier, at $146, was found to be the cheapest airline from Knoxville to Portland.Alternate airlines to your destination round-trip include Delta and American Airlines. Users have found that Frontier is 68% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Knoxville to Portland 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 Knoxville to Portland?

    Currently, November is the cheapest month in which you can book a flight from Knoxville to Portland (average of $277). Flying from Knoxville to Portland in March is currently the most expensive (average of $369). 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
Vancouver
Seaside
Beaverton
Clackamas
McMinnville
Lake Oswego
Hillsboro
Lincoln City
Cannon Beach
Long Beach
Longview
Tigard
Depoe Bay
Stevenson
Woodburn
Wilsonville
Pacific City
Troutdale
Tillamook
Gresham

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 5 airlines flying from Knoxville to Portland

Discover the top 5 airlines that operate flights from Knoxville to Portland. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$146Average$436FlexibilityNo cancel feeOn-time62%
DeltaCheapest$276Average$405FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$279Average$421FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$325Average$536FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$551Average$688FlexibilityNo cancel feeOn-time75%

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