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Cheap flights from Portland to Knoxville from $119

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Knoxville departing on 5/25. 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 Portland to Knoxville

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Portland to Knoxville.
Delta Logo
11:11 pm - 10:23 amPDX-TYS
8h 12m1 stop
Delta Logo
5:15 pm - 10:02 pmTYS-PDX
7h 47m1 stop
$251Delta
Find Deal
Tue, Jun 3 - Tue, Jun 10
Delta Logo
8:00 pm - 10:23 amPDX-TYS
11h 23m2 stops
Delta Logo
5:15 pm - 10:02 pmTYS-PDX
7h 47m1 stop
$256Delta
Find Deal
Tue, May 20 - Tue, Jun 10
United Airlines Logo
11:59 pm - 10:15 amPDX-TYS
7h 16m1 stop
United Airlines Logo
2:20 pm - 8:25 pmTYS-PDX
9h 05m1 stop
$275United Airlines
Find Deal
Fri, Sep 12 - Sat, Sep 13
United Airlines Logo
11:59 pm - 10:15 amPDX-TYS
7h 16m1 stop
United Airlines Logo
4:25 pm - 10:38 pmTYS-PDX
9h 13m1 stop
$296United Airlines
Find Deal
Tue, Sep 9 - Mon, Sep 15
 Logo
10:31 pm - 11:41 amPDX-TYS
10h 10m1 stop
 Logo
5:30 pm - 12:17 amTYS-PDX
9h 47m1 stop
Tue, May 20 - Sun, May 25
American Airlines Logo
11:59 pm - 11:41 amPDX-TYS
8h 42m1 stop
American Airlines Logo
6:25 pm - 12:36 amTYS-PDX
9h 11m1 stop
$309American Airlines
Find Deal
Tue, May 20 - Tue, Jun 10
American Airlines Logo
11:52 pm - 12:02 pmPDX-TYS
9h 10m1 stop
American Airlines Logo
5:20 am - 10:49 amTYS-PDX
8h 29m1 stop
$310American Airlines
Find Deal
Fri, May 2 - Sat, May 10
 Logo
1:37 pm - 9:59 pmPDX-TYS
29h 22m1 stop
 Logo
1:06 pm - 4:45 pmTYS-PDX
30h 39m2 stops
Sun, May 11 - Fri, May 16
Frontier Logo
6:35 am - 4:29 pmPDX-TYS
6h 54m1 stop
Frontier Logo
5:25 pm - 12:19 amTYS-PDX
9h 54m1 stop
$360Frontier
Find Deal
Thu, Jun 5 - Sun, Jun 8
Frontier Logo
6:35 am - 4:29 pmPDX-TYS
6h 54m1 stop
Frontier Logo
5:25 pm - 12:19 amTYS-PDX
9h 54m1 stop
$562Frontier
Find Deal
Thu, Jun 12 - Sun, Jun 15

United Airlines flights from Portland to Knoxville

Our best United Airlines deals on Portland to Knoxville flight tickets
United Airlines
Sep 12
PDX11:59 pmPortland
7h 16m
1 stop
TYS10:15 amKnoxville McGhee Tyson
Sep 13
TYS2:20 pmKnoxville McGhee Tyson
9h 05m
1 stop
PDX8:25 pmPortland
United Airlines
Sep 9
PDX11:59 pmPortland
7h 16m
1 stop
TYS10:15 amKnoxville McGhee Tyson
Sep 15
TYS4:25 pmKnoxville McGhee Tyson
9h 13m
1 stop
PDX10:38 pmPortland
United Airlines
May 28
PDX12:54 pmPortland
7h 45m
1 stop
TYS11:39 pmKnoxville McGhee Tyson
Jun 3
TYS5:38 pmKnoxville McGhee Tyson
7h 48m
1 stop
PDX10:26 pmPortland

American Airlines flights from Portland to Knoxville

Our best American Airlines deals on Portland to Knoxville flight tickets
American Airlines
May 20
PDX11:59 pmPortland
8h 42m
1 stop
TYS11:41 amKnoxville McGhee Tyson
Jun 10
TYS6:25 pmKnoxville McGhee Tyson
9h 11m
1 stop
PDX12:36 amPortland
American Airlines
May 2
PDX11:52 pmPortland
9h 10m
1 stop
TYS12:02 pmKnoxville McGhee Tyson
May 10
TYS5:20 amKnoxville McGhee Tyson
8h 29m
1 stop
PDX10:49 amPortland
American Airlines
May 2
PDX11:52 pmPortland
9h 37m
2 stops
TYS12:29 pmKnoxville McGhee Tyson
May 10
TYS5:20 amKnoxville McGhee Tyson
8h 29m
1 stop
PDX10:49 amPortland

See travel insights to Knoxville from

How to get the cheapest flight ticket from Portland to Knoxville

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 cheapest month to fly to Knoxville?

The month of September is, on average, the cheapest month to fly to Knoxville from Portland, with most prices found around $389. If you aren’t able to travel during the month of September, then book flights to Knoxville from Portland during February instead. Flights to Knoxville in February, while not as cheap as those in September, still average around $408.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Portland to Knoxville is on a Tuesday. Travelers who choose to depart for Knoxville on a Tuesday will often find tickets for as low as $442. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Portland to Knoxville for around $583.

What is the cheapest time of day to depart on your flight to Knoxville?

At noon is the cheapest time of day to fly from Portland to Knoxville when you can find flight prices for as low as $460. Flying to Knoxville at noon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the evening when prices are around $478.

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

You are more likely to see cheaper flights to Knoxville from Portland when booking 3 weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $475 when searching 3 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Portland for as low as $402 on momondo.

How have Portland to Knoxville flight prices changed over time?

As of April 2025, prices for Portland to Knoxville flights are approximately 64% cheaper when compared to flights at the same time last year.

When to book flights from Portland to Knoxville

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

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

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

Best Price Found

$119

Fastest flight time

6h 17m

Direct flights

None

Airports in Knoxville

1 airport
The best one-way flight to Knoxville from Portland in the past 72 hours is $119. The best round-trip flight deal from Portland to Knoxville found on momondo in the last 72 hours is $251.
The fastest flight from Portland to Knoxville takes 6h 17m
There are no direct flights from Portland to Knoxville. Popular non-direct route for this connection is Portland Airport - Knoxville McGhee Tyson Airport.
There is 1 airport near Knoxville: Knoxville McGhee Tyson (TYS)

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

    Portland and Knoxville McGhee Tyson are 2108.9 mi apart from one another. A reasonable flight in good conditions will take 6h 17m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The required travel and health documents for your Knoxville McGhee Tyson Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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


Best airlines flying from Portland to Knoxville

Compare and see reviews for airlines that fly from Portland to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $168Free CancellationRating
6.0
3,281 reviews
Search Frontier flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $308Free CancellationRating
8.0
7,916 reviews
Search Delta flights
United AirlinesPriceFrom $308Free CancellationRating
7.4
8,667 reviews
Search United Airlines flights

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Crossville
Murphy
Maryville
Newport
Alcoa
Oak Ridge
Kodak
Lenoir City
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

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

It is quick and easy to find Portland to Knoxville flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Knoxville that suits you.

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

Flights from Portland to Knoxville with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Knoxville from Portland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Knoxville, momondo offers a useful price alert feature which will track prices for flights to Knoxville from Portland and alert you when they change.


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