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Cheap flights from Knoxville to Portland from $175

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 8/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Knoxville to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:19 pm - 4:51 pm
TYS
-
PDX
23h 32m
1 stop
Frontier Logo
12:20 pm - 7:24 pm
PDX
-
TYS
28h 04m
1 stop
$348Frontier
Fri, Jul 17 - Thu, Jul 23
United Airlines Logo
6:02 pm - 10:50 pm
TYS
-
PDX
7h 48m
1 stop
United Airlines Logo
8:25 am - 8:24 pm
PDX
-
TYS
8h 59m
1 stop
$355United Airlines
Sat, Sep 5 - Sat, Sep 12
United Airlines Logo
4:50 pm - 9:05 pm
TYS
-
PDX
7h 15m
1 stop
United Airlines Logo
7:16 am - 8:24 pm
PDX
-
TYS
10h 08m
2 stops
$360United Airlines
Tue, Aug 18 - Tue, Aug 25
Frontier Logo
8:19 pm - 4:51 pm
TYS
-
PDX
23h 32m
1 stop
Frontier Logo
12:20 pm - 7:24 pm
PDX
-
TYS
28h 04m
1 stop
$364Frontier
Fri, Jul 10 - Thu, Jul 16
American Airlines Logo
6:10 pm - 11:55 pm
TYS
-
PDX
8h 45m
1 stop
American Airlines Logo
11:58 am - 11:18 pm
PDX
-
TYS
8h 20m
1 stop
$370American Airlines
Sat, Aug 1 - Tue, Aug 11
American Airlines Logo
5:31 pm - 12:55 am
TYS
-
PDX
10h 24m
1 stop
American Airlines Logo
9:47 pm - 8:31 am
PDX
-
TYS
7h 44m
1 stop
$373American Airlines
Wed, Jul 22 - Wed, Jul 29
Frontier Logo
8:19 pm - 4:51 pm
TYS
-
PDX
23h 32m
1 stop
Frontier Logo
12:20 pm - 7:24 pm
PDX
-
TYS
28h 04m
1 stop
$376Frontier
Wed, Jul 8 - Thu, Jul 16
Delta Logo
6:36 pm - 11:18 pm
TYS
-
PDX
7h 42m
1 stop
Delta Logo
10:55 pm - 9:36 am
PDX
-
TYS
7h 41m
1 stop
$387Delta
Wed, Jul 22 - Wed, Jul 29
Frontier Logo
8:32 pm - 4:57 pm
TYS
-
PDX
23h 25m
1 stop
Frontier Logo
5:16 pm - 7:24 pm
PDX
-
TYS
23h 08m
1 stop
$388Frontier
Fri, Jul 3 - Tue, Jul 7
Southwest Logo
5:30 pm - 11:10 pm
TYS
-
PDX
8h 40m
2 stops
Southwest Logo
5:50 am - 6:55 pm
PDX
-
TYS
10h 05m
2 stops
$395Southwest
Tue, Aug 18 - Tue, Aug 25

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United Airlines flights from Knoxville to Portland

Our best United Airlines deals on Knoxville to Portland flight tickets
United Airlines
Sep 5
TYS6:02 pmKnoxville McGhee Tyson
7h 48m
1 stop
PDX10:50 pmPortland
Sep 12
PDX8:25 amPortland
8h 59m
1 stop
TYS8:24 pmKnoxville McGhee Tyson
$355
United Airlines
Sep 5
TYS6:02 pmKnoxville McGhee Tyson
7h 48m
1 stop
PDX10:50 pmPortland
Sep 12
PDX8:40 amPortland
10h 05m
2 stops
TYS9:45 pmKnoxville McGhee Tyson
$360
United Airlines
Oct 7
TYS6:00 amKnoxville McGhee Tyson
8h 33m
1 stop
PDX11:33 amPortland
Oct 10
PDX10:43 amPortland
7h 17m
1 stop
TYS9:00 pmKnoxville McGhee Tyson
$383

American Airlines flights from Knoxville to Portland

Our best American Airlines deals on Knoxville to Portland flight tickets
American Airlines
Aug 1
TYS6:10 pmKnoxville McGhee Tyson
8h 45m
1 stop
PDX11:55 pmPortland
Aug 11
PDX11:58 amPortland
8h 20m
1 stop
TYS11:18 pmKnoxville McGhee Tyson
$370
American Airlines
Sep 5
TYS10:57 amKnoxville McGhee Tyson
9h 33m
2 stops
PDX5:30 pmPortland
Sep 12
PDX6:00 amPortland
7h 42m
1 stop
TYS4:42 pmKnoxville McGhee Tyson
$402
American Airlines
Jul 20
TYS8:11 pmKnoxville McGhee Tyson
7h 44m
1 stop
PDX12:55 amPortland
Aug 4
PDX9:47 pmPortland
8h 56m
1 stop
TYS9:43 amKnoxville McGhee Tyson
$406

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 June 25, 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 7/17

8:19 pm-4:51 pm

1 stop23h 32m

Portland

Thu 7/23

12:20 pm-7:24 pm

1 stop28h 04m

$348

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sat 9/5

6:02 pm-10:50 pm

1 stop7h 48m

Portland

Sat 9/12

8:25 am-8:24 pm

1 stop8h 59m

$355

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 8/18

4:50 pm-9:05 pm

1 stop7h 15m

Portland

Tue 8/25

7:16 am-8:24 pm

2 stops10h 08m

$360

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Fri 7/10

8:19 pm-4:51 pm

1 stop23h 32m

Portland

Thu 7/16

12:20 pm-7:24 pm

1 stop28h 04m

$364

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sat 8/1

6:10 pm-11:55 pm

1 stop8h 45m

Portland

Tue 8/11

11:58 am-11:18 pm

1 stop8h 20m

$370

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 7/22

5:31 pm-12:55 am

1 stop10h 24m

Portland

Wed 7/29

9:47 pm-8:31 am

1 stop7h 44m

$373

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 7/8

8:19 pm-4:51 pm

1 stop23h 32m

Portland

Thu 7/16

12:20 pm-7:24 pm

1 stop28h 04m

$376
Quickest round-trip

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 7/22

6:36 pm-11:18 pm

1 stop7h 42m

Portland

Wed 7/29

10:55 pm-9:36 am

1 stop7h 41m

$387

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Fri 7/3

8:32 pm-4:57 pm

1 stop23h 25m

Portland

Tue 7/7

5:16 pm-7:24 pm

1 stop23h 08m

$388

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 8/18

5:30 pm-11:10 pm

2 stops8h 40m

Portland

Tue 8/25

5:50 am-6:55 pm

2 stops10h 05m

$395

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 February. Flight prices, which tend to average around $401, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in February, then you should wait until November to fly from Knoxville, when ticket prices are also cheap, with an average price of $436.

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 $507 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 $420 on momondo.

How have Knoxville to Portland flight prices changed over time?

As of June 2026, prices for Knoxville to Portland flights are approximately 37% cheaper 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

7h 29m

Direct flights

None
The fastest flight from Knoxville to Portland takes 7h 29m
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 7h 29m.

  • 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
American AirlinesPriceFrom $279Free CancellationRating
7.1
11,756 reviews
Search American Airlines flights
United AirlinesPriceFrom $345Free CancellationRating
7.4
9,887 reviews
Search United Airlines flights
DeltaPriceFrom $353Free CancellationRating
7.8
8,440 reviews
Search Delta 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
Hillsboro
Depoe Bay
Tigard
Longview
Hood River
Newberg
Clackamas
Troutdale
Gresham
The Dalles
Kelso

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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