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Cheap flights from Knoxville to Portland from $153

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Portland departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Knoxville to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:32 pm - 4:46 pm
TYS
-
PDX
23h 14m
1 stop
Frontier Logo
5:20 pm - 7:37 pm
PDX
-
TYS
23h 17m
1 stop
$261Frontier
Fri, Jun 5 - Tue, Jun 9
Frontier Logo
8:32 pm - 5:01 pm
TYS
-
PDX
23h 29m
1 stop
Frontier Logo
12:35 pm - 7:33 pm
PDX
-
TYS
27h 58m
1 stop
$300Frontier
Mon, Jun 1 - Sun, Jun 7
Frontier Logo
8:32 pm - 4:31 pm
TYS
-
PDX
22h 59m
1 stop
Frontier Logo
5:16 pm - 7:36 pm
PDX
-
TYS
23h 20m
1 stop
$345Frontier
Mon, Jul 20 - Tue, Aug 4
Frontier Logo
8:32 pm - 4:57 pm
TYS
-
PDX
23h 25m
1 stop
Frontier Logo
5:20 pm - 7:37 pm
PDX
-
TYS
23h 17m
1 stop
$346Frontier
Fri, Jun 19 - Tue, Jun 23
Multiple Airlines Logo
7:00 am - 7:47 pm
TYS
-
PDX
39h 47m
2 stops
Multiple Airlines Logo
5:20 pm - 7:37 pm
PDX
-
TYS
23h 17m
1 stop
$353Multiple Airlines
Thu, Jun 18 - Tue, Jun 23
Frontier Logo
8:32 pm - 5:01 pm
TYS
-
PDX
23h 29m
1 stop
Frontier Logo
12:35 pm - 7:33 pm
PDX
-
TYS
27h 58m
1 stop
$366Frontier
Mon, Jun 1 - Sun, Jun 7
Multiple Airlines Logo
7:00 am - 4:57 pm
TYS
-
PDX
12h 57m
1 stop
Multiple Airlines Logo
5:42 pm - 7:37 pm
PDX
-
TYS
22h 55m
1 stop
$396Multiple Airlines
Thu, Aug 27 - Tue, Sep 1
Multiple Airlines Logo
1:01 pm - 9:41 am
TYS
-
PDX
23h 40m
2 stops
Multiple Airlines Logo
12:35 pm - 7:33 pm
PDX
-
TYS
27h 58m
1 stop
$401Multiple Airlines
Thu, May 28 - Sun, May 31
Multiple Airlines Logo
7:00 am - 4:57 pm
TYS
-
PDX
12h 57m
1 stop
Multiple Airlines Logo
5:20 pm - 7:37 pm
PDX
-
TYS
23h 17m
1 stop
$402Multiple Airlines
Thu, Jun 18 - Tue, Jun 23
Multiple Airlines Logo
7:00 am - 4:46 pm
TYS
-
PDX
12h 46m
1 stop
Multiple Airlines Logo
12:35 pm - 7:33 pm
PDX
-
TYS
27h 58m
1 stop
$404Multiple Airlines
Thu, May 28 - Sun, May 31

Frontier flights from Knoxville to Portland

Our best Frontier deals on Knoxville to Portland flight tickets
Frontier
Jun 5
TYS8:32 pmKnoxville McGhee Tyson
23h 14m
1 stop
PDX4:46 pmPortland
Jun 9
PDX5:20 pmPortland
23h 17m
1 stop
TYS7:37 pmKnoxville McGhee Tyson
$261
Frontier
Jun 1
TYS8:32 pmKnoxville McGhee Tyson
23h 29m
1 stop
PDX5:01 pmPortland
Jun 7
PDX12:35 pmPortland
27h 58m
1 stop
TYS7:33 pmKnoxville McGhee Tyson
$300
Frontier
Jul 20
TYS8:32 pmKnoxville McGhee Tyson
22h 59m
1 stop
PDX4:31 pmPortland
Aug 4
PDX5:16 pmPortland
23h 20m
1 stop
TYS7:36 pmKnoxville McGhee Tyson
$345

American Airlines flights from Knoxville to Portland

Our best American Airlines deals on Knoxville to Portland flight tickets
American Airlines
Jun 4
TYS8:11 pmKnoxville McGhee Tyson
7h 39m
1 stop
PDX12:50 amPortland
Jun 7
PDX12:40 amPortland
9h 22m
1 stop
TYS1:02 pmKnoxville McGhee Tyson
$405
American Airlines
Jun 30
TYS5:33 pmKnoxville McGhee Tyson
8h 18m
1 stop
PDX10:51 pmPortland
Jul 6
PDX11:41 pmPortland
8h 32m
1 stop
TYS11:13 amKnoxville McGhee Tyson
$417
American Airlines
May 28
TYS8:11 pmKnoxville McGhee Tyson
7h 39m
1 stop
PDX12:50 amPortland
May 29
PDX9:47 pmPortland
9h 49m
1 stop
TYS10:36 amKnoxville McGhee Tyson
$431

momondo 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, momondo users made 832,500 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from Knoxville to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Fri 6/5

8:32 pm-4:46 pm

1 stop23h 14m

Portland

Tue 6/9

5:20 pm-7:37 pm

1 stop23h 17m

$261

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-5:01 pm

1 stop23h 29m

Portland

Sun 6/7

12:35 pm-7:33 pm

1 stop27h 58m

$300

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Mon 7/20

8:32 pm-4:31 pm

1 stop22h 59m

Portland

Tue 8/4

5:16 pm-7:36 pm

1 stop23h 20m

$345

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Fri 6/19

8:32 pm-4:57 pm

1 stop23h 25m

Portland

Tue 6/23

5:20 pm-7:37 pm

1 stop23h 17m

$346

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 6/18

7:00 am-7:47 pm

2 stops39h 47m

Portland

Tue 6/23

5:20 pm-7:37 pm

1 stop23h 17m

$353

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-5:01 pm

1 stop23h 29m

Portland

Sun 6/7

12:35 pm-7:33 pm

1 stop27h 58m

$366
Quickest round-trip

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 8/27

7:00 am-4:57 pm

1 stop12h 57m

Portland

Tue 9/1

5:42 pm-7:37 pm

1 stop22h 55m

$396

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 5/28

1:01 pm-9:41 am

2 stops23h 40m

Portland

Sun 5/31

12:35 pm-7:33 pm

1 stop27h 58m

$401

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 6/18

7:00 am-4:57 pm

1 stop12h 57m

Portland

Tue 6/23

5:20 pm-7:37 pm

1 stop23h 17m

$402

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 5/28

7:00 am-4:46 pm

1 stop12h 46m

Portland

Sun 5/31

12:35 pm-7:33 pm

1 stop27h 58m

$404

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portland from

How to get the cheapest flight ticket from Knoxville to Portland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Knoxville and Portland?

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from Knoxville is in August. Flight prices, which tend to average around $321, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in August, then you should wait until February to fly from Knoxville, when ticket prices are also cheap, with an average price of $380.

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

You are more likely to see cheaper flights to Portland from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $468 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Knoxville for as low as $344 on momondo.

How have Knoxville to Portland flight prices changed over time?

As of May 2026, prices for Knoxville to Portland flights are approximately 17% more expensive when compared to flights at the same time last year.

When to book flights from Knoxville to Portland

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Portland according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to Portland (TYS to PDX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Portland

Fastest flight time

6h 56m

Direct flights

None
The fastest flight from Knoxville to Portland takes 6h 56m
There are no direct flights from Knoxville to Portland. There are no popular flight routes from Knoxville to Portland.
Search flight deals

Frequently asked questions about flying from Knoxville to Portland

  • How far is Knoxville McGhee Tyson to Portland by plane?

    Knoxville McGhee Tyson and Portland are 2108.9 mi apart from one another. A reasonable flight in good conditions will take 6h 56m.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Portland Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Portland Airport were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Portland Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Portland Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The necessary travel and health documents for your Portland Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Knoxville to Portland?

Best airlines flying from Knoxville to Portland

Compare and see reviews for airlines that fly from Knoxville to Portland with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $250Free CancellationRating
7.9
8,459 reviews
Search Delta flights
American AirlinesPriceFrom $279Free CancellationRating
7.1
11,668 reviews
Search American Airlines flights
United AirlinesPriceFrom $345Free CancellationRating
7.4
9,683 reviews
Search United Airlines flights

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Lincoln City
Seaside
Cannon Beach
Vancouver
Salem
Astoria
Long Beach
Rockaway Beach
Beaverton
Depoe Bay
Hillsboro
Tigard
Longview
Hood River
Troutdale
Newberg
McMinnville
The Dalles
Manzanita
Pacific City

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Portland?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Knoxville to Portland for you.

Can I find flights from Knoxville to Portland with flexible booking policies on momondo?

momondo does allow users to show only those flights to Portland from Knoxville which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Knoxville to Portland?

Once all potential Knoxville to Portland flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Knoxville to Portland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Knoxville to Portland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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