PWM - TYS

$150 Find Cheap Flights from Portland to Knoxville - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Knoxville departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$275
Typical prices: $325-$406
United Airlines
Wed 9/23Tue 9/29
PWM - TYS • 1 stop
Cheapest one-way
$149
Typical prices: $268-$288
Multiple Airlines
Tue 9/1
PWM - TYS • 2 stops
Top airlines
Cheapest • from $275 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Portland and Knoxville. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $372 (round-trip)
Shortest trip • 4h 35m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Knoxville (PWM-TYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Knoxville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Knoxville

Wed, Sep 23 - Tue, Sep 29
United Airlines Logo
4:57 pm - 10:49 pm
PWM
-
TYS
5h 52m
1 stop
United Airlines Logo
5:45 am - 10:02 am
TYS
-
PWM
4h 17m
1 stop
$275United Airlines
Thu, Aug 27 - Mon, Aug 31
American Airlines Logo
3:06 pm - 8:07 pm
PWM
-
TYS
5h 01m
1 stop
American Airlines Logo
6:32 pm - 11:37 pm
TYS
-
PWM
5h 05m
1 stop
$275American Airlines
Wed, Sep 9 - Mon, Sep 14
Delta Logo
6:30 am - 11:04 am
PWM
-
TYS
4h 34m
1 stop
Delta Logo
5:15 pm - 11:17 pm
TYS
-
PWM
6h 02m
1 stop
$275Delta
Wed, Sep 23 - Tue, Sep 29
Delta Logo
6:30 am - 11:04 am
PWM
-
TYS
4h 34m
1 stop
Delta Logo
6:13 pm - 11:28 pm
TYS
-
PWM
5h 15m
1 stop
$275Delta
Wed, Sep 23 - Tue, Sep 29
American Airlines Logo
6:00 am - 10:38 am
PWM
-
TYS
4h 38m
1 stop
American Airlines Logo
6:15 am - 12:40 pm
TYS
-
PWM
6h 25m
1 stop
$275American Airlines
Wed, Sep 23 - Tue, Sep 29
United Airlines Logo
4:57 pm - 10:49 pm
PWM
-
TYS
5h 52m
1 stop
United Airlines Logo
5:45 am - 10:02 am
TYS
-
PWM
4h 17m
1 stop
$299United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
5:30 am - 10:50 am
PWM
-
TYS
5h 20m
1 stop
United Airlines Logo
3:45 pm - 11:59 pm
TYS
-
PWM
8h 14m
2 stops
$304United Airlines
Thu, Nov 12 - Mon, Nov 16
Southwest Logo
5:20 am - 4:50 pm
PWM
-
TYS
11h 30m
2 stops
Southwest Logo
7:55 am - 2:45 pm
TYS
-
PWM
6h 50m
1 stop
$326Southwest
Thu, Nov 12 - Sun, Nov 15
Southwest Logo
5:10 pm - 9:40 pm
PWM
-
TYS
4h 30m
1 stop
Southwest Logo
8:10 am - 1:05 pm
TYS
-
PWM
4h 55m
1 stop
$331Southwest
Thu, Oct 15 - Sun, Oct 18
Multiple Airlines Logo
7:00 am - 6:40 pm
PWM
-
TYS
11h 40m
2 stops
Multiple Airlines Logo
3:08 pm - 9:08 am
TYS
-
PWM
18h 00m
1 stop
$444Multiple Airlines
Booking Insights

KAYAK's insights & trends for Portland to Knoxville flights

Get data-powered insights and trends into flights from Portland to Knoxville to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Portland, Maine to Knoxville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Portland, Maine to Knoxville departing in September.

Flight prices are below average for this route right now.

Flights to Knoxville from Portland, Maine usually cost between $288 and $358 in September.
The lowest price found in the past 5 days was $275 on Delta (Sep 23-Sep 29).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Knoxville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Knoxville is January, where tickets cost $285 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $724 and $547 respectively.

Good to know

Low season

December

Cheapest flight

$150
Best time to beat the crowds but there is an average 68% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from Portland to Knoxville

When to book flights from Portland to Knoxville

Are your dates flexible? Find out the best times to travel from Portland to Knoxville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Knoxville

  • What is the cheapest flight from Portland to Knoxville?

    In the last 5 days, the lowest price for a flight from Portland to Knoxville was $149 for a one-way ticket and $275 for a round-trip.

  • Do I need a passport to fly between Portland and Knoxville?

    No, a passport isn't needed to fly from Portland to Knoxville. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Portland to Knoxville?

    On your way to Knoxville, you’ll fly out from Portland. You’ll be landing at Knoxville McGhee Tyson.

  • Which aircraft models fly most regularly from Portland to Knoxville?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Knoxville?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Portland and Knoxville, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Knoxville, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Portland to Knoxville are Southwest and Delta. With an average price for the route of $413 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $433 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Portland to Knoxville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Knoxville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Knoxville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Knoxville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Knoxville with an airline and back to Portland with another airline. Booking your flights between Portland and TYS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Knoxville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Knoxville from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Portland to Knoxville

 
See real verified KAYAK customer reviews for airlines flying from Portland to Knoxville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Knoxville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4222 reviews
7.0Food
8.0Comfort
7.5Entertainment
8.6Crew
8.1Boarding
Airline reviews

Eveeyrime I fly they are begging for bags due to cabin overhead space. What they should so ia take the bags that are clearly too big to fit wheels first on their side. And those of us who give up the bag should really get their bags first. When boarding, nobody wants stupid jokes about how hot it is on board. Give us some cool air. Im usually sick from the heat by the time we take off.

6.0 GoodVera, Jul 2026
MCO - BNA
Read more Southwest reviews

Eveeyrime I fly they are begging for bags due to cabin overhead space. What they should so ia take the bags that are clearly too big to fit wheels first on their side. And those of us who give up the bag should really get their bags first. When boarding, nobody wants stupid jokes about how hot it is on board. Give us some cool air. Im usually sick from the heat by the time we take off.

My experience will Southwest was good. I wish there was more entertainment and the boarding process was slow at time but other than that my experience was great definitely will be flying with SouthWest again.

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

I was supposed to be on a later flight. When I showed up at the gate, the woman working there was extremely helpful getting moved up to this earlier flight.

Flight was on time. Wi-fi was a little spotty/slow. Boarding and exit were efficient.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Boarded the plane in Portland and sat on the tarmac for four hours before being given clearance to take off. Apparently a "scratch" was detected on the preflight inspection. This delay resulted in me missing my connection in Baltimore. I therefore had to stay overnight and then catch an early flight this morning, which resulted in my missing a mandatory class. I would like a refund / voucher to cover the cost of the missed flight. And additional voucher for the time spent on the plane in Portland would also be appreciated.

Internet didn’t work for this leg either. The seat was fine but didn’t have seatback screen, which I knew when I booked it. The biggest letdown is Deltas new policy on beverage/snack service not being served for flights less than 350 miles. I know this is a cost cutting measure, but how much does it really cost to give a drink and a snack for inflated airfare? I really am surprised that with Delta Comfort they don’t provide beverage/snack service given these seats cost extra to purchase. Really need to reconsider this, even if it’s for the Delta Comfort and above.

The flights are constantly late anymore, and they won't even give you a glass of water on the plane. For years, they were able to do a service on this flight from Atlanta to Knoxville and Knoxville Atlanta now they say it's too short of a flight. You can't even get a quick drink of water.

Should never have had to go to Detroit from Orlando back to Tennessee!

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

Smallest leg room I've ever had on a plane.

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

Kind staff. Snacks are small but that’s the new normal.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

Delta did an awful job w logistics at DTW. Missed connection. We were there an hour early. SUCKED

It's fine but Newark to Nashville was too long

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

We had excellent customer service despite the chaos at George Bush airport in Houston!

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

They changed my flight 5 hours before it took off and changed my connecting airport messing up my entire 1st day in Japan.

For some strange reason I was put in zone 5 for boarding even though I had paid premium price for a premium seat right behind business class. This must have been a flaw because everyone else around me in the same zone (row) had been placed in zone 3.

The flight was delayed almost three hours. I understand delays happen from time to time, but this flight was delayed no less than 10 times. I wish the amount of time of the delay was more accurate, versus delaying in 10 or 20 minute increments many, many times.

Delayed by 5 hours and I had to wit in the airport for more than 6+ hours.

technology worked well and everything ran smoothly. The seats are quite cramped so please don't try to re-engineer the cabin to squeeze more bodies on board.

Delays experienced in boarding/take off due to incoming plane delayed. However, the boarding time/depart time in the app was significantly delayed in providing these updates. Usually not updated until an hour after we should have already boarded. Poorly managed.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

At least it was a short flight. Greyhound with wings.

Our flight got changed and/or delayed 8 times before we boarded.

Flight was delayed after boarding and no idea when it would take off. Crew in Portland did arrange for transport to Boston for a different set of flights to my destination.

Seats are so close together. Middle seats should be discounted.

Everything you need to know for your flight from Portland to Knoxville

Information on your arrival and departure airports