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Cheap flights from Knoxville to Portland from $259

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Portland departing on 9/12. 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

American Airlines Logo
6:10 pm - 11:05 pmTYS-PWM
4h 55m1 stop
American Airlines Logo
6:00 am - 10:53 amPWM-TYS
4h 53m1 stop
$259American Airlines
Find Deal
Fri, Sep 12 - Tue, Sep 16
Delta Logo
7:11 pm - 12:11 amTYS-PWM
5h 00m1 stop
Delta Logo
6:00 am - 5:03 pmPWM-TYS
11h 03m2 stops
$264Delta
Find Deal
Fri, Sep 12 - Tue, Sep 16
American Airlines Logo
6:14 am - 11:44 amTYS-PWM
5h 30m1 stop
American Airlines Logo
1:09 pm - 5:43 pmPWM-TYS
4h 34m1 stop
$274American Airlines
Find Deal
Wed, Sep 3 - Thu, Sep 11
American Airlines Logo
5:20 pm - 11:45 pmTYS-PWM
6h 25m1 stop
American Airlines Logo
1:09 pm - 7:46 pmPWM-TYS
6h 37m2 stops
$279American Airlines
Find Deal
Wed, Sep 3 - Thu, Sep 11
American Airlines Logo
12:15 pm - 8:11 pmTYS-PWM
7h 56m2 stops
American Airlines Logo
1:09 pm - 7:46 pmPWM-TYS
6h 37m2 stops
$284American Airlines
Find Deal
Wed, Sep 3 - Thu, Sep 11
Delta Logo
11:26 am - 4:10 pmTYS-PWM
4h 44m1 stop
Delta Logo
6:00 am - 10:27 amPWM-TYS
4h 27m1 stop
$289Delta
Find Deal
Wed, Sep 3 - Sat, Sep 6
United Airlines Logo
9:55 am - 2:25 pmTYS-PWM
4h 30m1 stop
United Airlines Logo
6:00 am - 5:00 pmPWM-TYS
11h 00m2 stops
$294United Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
United Airlines Logo
2:30 pm - 11:03 pmTYS-PWM
8h 33m2 stops
United Airlines Logo
4:11 pm - 11:57 pmPWM-TYS
7h 46m2 stops
$299United Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
6:10 pm - 11:05 pmTYS-PWM
4h 55m1 stop
American Airlines Logo
6:05 pm - 12:07 amPWM-TYS
6h 02m1 stop
$309American Airlines
Find Deal
Thu, Sep 11 - Thu, Sep 18
United Airlines Logo
7:00 am - 2:26 pmTYS-PWM
7h 26m1 stop
United Airlines Logo
7:26 pm - 11:57 pmPWM-TYS
4h 31m1 stop
$389United Airlines
Find Deal
Fri, Sep 5 - Tue, Sep 9

American Airlines flights from Knoxville to Portland, Maine

Our best American Airlines deals on Knoxville to Portland, Maine flight tickets
American Airlines
Sep 12
TYS6:10 pmKnoxville McGhee Tyson
4h 55m
1 stop
PWM11:05 pmPortland
Sep 16
PWM6:00 amPortland
4h 53m
1 stop
TYS10:53 amKnoxville McGhee Tyson
$259
Find similar
American Airlines
Sep 3
TYS6:14 amKnoxville McGhee Tyson
5h 30m
1 stop
PWM11:44 amPortland
Sep 11
PWM1:09 pmPortland
4h 34m
1 stop
TYS5:43 pmKnoxville McGhee Tyson
$274
Find similar
American Airlines
Sep 3
TYS5:20 pmKnoxville McGhee Tyson
6h 25m
1 stop
PWM11:45 pmPortland
Sep 11
PWM1:09 pmPortland
6h 37m
2 stops
TYS7:46 pmKnoxville McGhee Tyson
$279
Find similar

Delta flights from Knoxville to Portland, Maine

Our best Delta deals on Knoxville to Portland, Maine flight tickets
Delta
Sep 12
TYS7:11 pmKnoxville McGhee Tyson
5h 00m
1 stop
PWM12:11 amPortland
Sep 16
PWM6:00 amPortland
11h 03m
2 stops
TYS5:03 pmKnoxville McGhee Tyson
$264
Find similar
Delta
Sep 4
TYS1:53 pmKnoxville McGhee Tyson
10h 55m
2 stops
PWM12:48 amPortland
Sep 9
PWM6:00 amPortland
7h 08m
2 stops
TYS1:08 pmKnoxville McGhee Tyson
$284
Find similar
Delta
Sep 3
TYS11:26 amKnoxville McGhee Tyson
4h 44m
1 stop
PWM4:10 pmPortland
Sep 6
PWM6:00 amPortland
4h 27m
1 stop
TYS10:27 amKnoxville McGhee Tyson
$289
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Portland, Maine 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 August 21, 2025.
Use the filters below to find and compare flights from Knoxville to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Fri 9/12

6:10 pm-11:05 pm

1 stop4h 55m

Portland

Tue 9/16

6:00 am-10:53 am

1 stop4h 53m

$259

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Fri 9/12

7:11 pm-12:11 am

1 stop5h 00m

Portland

Tue 9/16

6:00 am-5:03 pm

2 stops11h 03m

$264

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

6:14 am-11:44 am

1 stop5h 30m

Portland

Thu 9/11

1:09 pm-5:43 pm

1 stop4h 34m

$274

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

5:20 pm-11:45 pm

1 stop6h 25m

Portland

Thu 9/11

1:09 pm-7:46 pm

2 stops6h 37m

$279

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

12:15 pm-8:11 pm

2 stops7h 56m

Portland

Thu 9/11

1:09 pm-7:46 pm

2 stops6h 37m

$284

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

11:26 am-4:10 pm

1 stop4h 44m

Portland

Sat 9/6

6:00 am-10:27 am

1 stop4h 27m

$289

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

9:55 am-2:25 pm

1 stop4h 30m

Portland

Sat 9/6

6:00 am-5:00 pm

2 stops11h 00m

$294

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 9/3

2:30 pm-11:03 pm

2 stops8h 33m

Portland

Sat 9/6

4:11 pm-11:57 pm

2 stops7h 46m

$299

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Thu 9/11

6:10 pm-11:05 pm

1 stop4h 55m

Portland

Thu 9/18

6:05 pm-12:07 am

1 stop6h 02m

$309

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Fri 9/5

7:00 am-2:26 pm

1 stop7h 26m

Portland

Tue 9/9

7:26 pm-11:57 pm

1 stop4h 31m

$389

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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, Maine

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 Portland, Maine?

The cheapest month to fly to Portland, Maine from Knoxville is in January. Flight prices, which tend to average around $258, are often lower during this time because this is during the off-season. If you aren’t able to travel to Portland, Maine during the month of January, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $308.

What is the cheapest day to depart on your flight to Portland, Maine?

On average, the least expensive day to fly to Portland, Maine from Knoxville is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $331. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Knoxville because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $452.

What is the cheapest time of day to depart on your flight to Portland, Maine?

In the afternoon is the cheapest time of day to fly from Knoxville to Portland, Maine when you can find flight prices for as low as $325. Flying to Portland, Maine in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $452. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Portland, Maine?

You are more likely to see cheaper flights to Portland, Maine from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland, Maine for around $355 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland, Maine from Knoxville for as low as $273 on momondo.

When to book flights from Knoxville to Portland, Maine

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

Cheap Knoxville to Portland, Maine (TYS to PWM) flight deals and tips

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

Direct flights

None
There are no direct flights from Knoxville to Portland, Maine. There are no popular flight routes from Knoxville to Portland, Maine.
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  • How far is Knoxville McGhee Tyson to Portland by plane?

    A flight from Knoxville McGhee Tyson to Portland will travel around 897.0 mi. Flights usually cover this in 4h 13m, depending on flying conditions and air traffic around both airports.

  • 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 travel and health documents required for your trip to Portland Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portland Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Knoxville to Portland, Maine

Compare and see reviews for airlines that fly from Knoxville to Portland, Maine with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $246Free CancellationRating
7.9
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Boothbay Harbor
Jackson
Conway
Freeport
Lewiston
Bartlett
Gorham
Brunswick
Auburn
Intervale
Windham
Bath
Oxford
Georgetown
Tamworth
Falmouth

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portland from Knoxville.

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

Yes. momondo enables you to select and highlight flights to Portland from Knoxville with this policy.

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?

If you are not ready to book a flight from Knoxville to Portland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portland and let you know when they change.

An easier way to manage your Portland, Maine trip

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