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$148+ Cheap flights from Knoxville to Portland, ME (TYS - PWM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PWM
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap flight deals from Knoxville to Portland

Cheapest flights from Knoxville to Portland
Explore the most affordable flight options available from Knoxville to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This American Airlines deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:30 pm
TYS
-
PWM
1 stop4h 54m
American Airlines
Sat 9/267:20 pm
PWM
-
TYS
1 stop4h 50m
American Airlines
Deal found 3/6$299
This Southwest deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/312:50 pm
TYS
-
PWM
2 stops9h 45m
Southwest
Wed 6/1010:30 am
PWM
-
TYS
2 stops9h 50m
Southwest
Deal found 3/8$309
This American Airlines deal was found by Cheapflights users on 3/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:20 pm
TYS
-
PWM
1 stop6h 15m
American Airlines
Mon 6/297:58 am
PWM
-
TYS
1 stop5h 15m
American Airlines
Deal found 3/7$319
This Southwest deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:50 am
TYS
-
PWM
1 stop4h 05m
Southwest
Sat 4/45:20 pm
PWM
-
TYS
1 stop4h 50m
Southwest
Deal found 3/6$324
This United Airlines deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:19 pm
TYS
-
PWM
1 stop4h 32m
United Airlines
Tue 6/305:15 am
PWM
-
TYS
2 stops8h 04m
United Airlines
Deal found 3/6$326
This Southwest deal was found by Cheapflights users on 3/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:25 am
TYS
-
PWM
1 stop6h 35m
Southwest
Tue 8/251:05 pm
PWM
-
TYS
1 stop6h 45m
Southwest
Deal found 3/7$328
This American Airlines deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/261:10 pm
TYS
-
PWM
1 stop7h 13m
American Airlines
Sat 10/312:39 pm
PWM
-
TYS
2 stops6h 25m
American Airlines
Deal found 3/6$329
This Southwest deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2412:45 pm
TYS
-
PWM
2 stops10h 10m
Southwest
Mon 6/295:35 am
PWM
-
TYS
2 stops10h 10m
Southwest
Deal found 3/8$334
This Southwest deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:55 pm
TYS
-
PWM
2 stops9h 15m
Southwest
Sat 5/305:40 am
PWM
-
TYS
1 stop7h 40m
Southwest
Deal found 3/8$339

Find flight deals from Knoxville to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(Delta)

One-way from

$148
(Delta)

Popular in

November

Cheapest in

September

Average price

$592
Provider with most accurate pricing for Knoxville McGhee Tyson-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Portland flights.
Search Deals
From Knoxville McGhee Tyson to Portland
Search Deals
One-way flight from Knoxville McGhee Tyson to Portland
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated March 10, 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 - PWM

TYSPWM

Knoxville McGhee Tyson

Thu 6/25

7:19 pm-11:51 pm

1 stop4h 32m

Portland

Tue 6/30

5:15 am-1:19 pm

2 stops8h 04m

$326

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Thu 6/25

12:35 pm-12:05 am

2 stops11h 30m

Portland

Tue 6/30

5:30 am-5:00 pm

2 stops11h 30m

$334

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 6/24

6:20 pm-12:35 am

1 stop6h 15m

Portland

Mon 6/29

7:58 am-1:13 pm

1 stop5h 15m

$344

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Mon 7/20

7:20 pm-11:53 pm

1 stop4h 33m

Portland

Mon 7/27

6:50 pm-11:46 pm

1 stop4h 56m

$369
Quickest round-trip

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sat 8/29

5:45 am-10:02 am

1 stop4h 17m

Portland

Wed 9/2

7:35 pm-11:57 pm

1 stop4h 22m

$369

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Thu 5/14

6:35 am-11:25 pm

2 stops16h 50m

Portland

Wed 5/20

3:55 pm-8:50 pm

1 stop4h 55m

$372

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 7/22

8:10 am-6:30 pm

1 stop10h 20m

Portland

Mon 7/27

5:35 am-3:45 pm

2 stops10h 10m

$376

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Wed 3/25

5:01 pm-11:12 pm

1 stop6h 11m

Portland

Sat 4/4

5:23 am-1:24 pm

1 stop8h 01m

$394

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Fri 3/20

1:20 pm-12:05 am

2 stops10h 45m

Portland

Tue 3/24

5:30 am-5:40 pm

2 stops12h 10m

$394
Cheapest one-way
Quickest one-way

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sun 5/24

6:00 am-10:17 am

1 stop4h 17m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from Knoxville to Portland

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Portland in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Portland, Maine flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Portland, Maine flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Knoxville to Portland, Maine?

Currently, July is the cheapest month in which you can book a flight from Knoxville to Portland, Maine (average of $63). Flying from Knoxville to Portland, Maine in January is currently the most expensive (average of $186). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated March 10, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican Airlines from Knoxville to Portland. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,276 reviews
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,409 reviews
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,413 reviews
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Knoxville to Portland, Maine?

    There are many flights that can get you from Knoxville to Portland, Maine in 4h 17m. Fly via Delta, United Airlines, or Southwest to get the fastest option. The distance from Knoxville to Portland, Maine is about 904 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Knoxville to Portland, Maine round-trip?

    Cheapflights users have booked flights from Knoxville to Portland, Maine round-trip from $258. Other airlines that can offer you cheap pricing are United Airlines, from $258, and Delta, from $258. American Airlines is 38% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Knoxville to Portland that include hotel bookings?

    Yes. In addition to deals on Knoxville to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Portland.

  • Can I find deals for business class flights from Knoxville to Portland?

    Yes. Cheapflights offers flight deals from Knoxville to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Portland, Maine?

    Currently, July is the cheapest month in which you can book a flight from Knoxville to Portland, Maine (average of $63). Flying from Knoxville to Portland, Maine in January is currently the most expensive (average of $186). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Brunswick
Auburn
Lewiston
Conway

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Knoxville to Portland

Discover the top 3 airlines that operate flights from Knoxville to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$258Average$389FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$378FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$418FlexibilityNo cancel feeOn-timeN/A

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