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$138+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PWM
Aug 4 — Aug 111
Tue 8/4
Tue 8/11
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 July 5, 2026.

This United Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 8/197:20 pm
TYS
-
PWM
1 stop4h 39m
United Airlines
Wed 9/27:35 pm
PWM
-
TYS
1 stop4h 24m
United Airlines
Deal found 7/2$275
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 7/297:19 pm
TYS
-
PWM
1 stop4h 32m
United Airlines
Wed 8/55:15 am
PWM
-
TYS
1 stop5h 27m
United Airlines
Deal found 6/30$297
This American Airlines deal was found by Cheapflights users on 7/1. 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 9/193:53 pm
TYS
-
PWM
1 stop6h 20m
American Airlines
Sat 9/267:00 am
PWM
-
TYS
1 stop4h 41m
American Airlines
Deal found 7/1$315
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:15 pm
TYS
-
PWM
1 stop6h 15m
Delta
Thu 8/136:05 am
PWM
-
TYS
1 stop5h 06m
Delta
Deal found 7/2$319
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:00 pm
TYS
-
PWM
1 stop4h 31m
Delta
Sat 8/156:10 am
PWM
-
TYS
1 stop4h 48m
Delta
Deal found 7/1$326
This Southwest deal was found by Cheapflights users on 7/5. 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 9/56:50 am
TYS
-
PWM
2 stops14h 10m
Southwest
Sat 9/1212:20 pm
PWM
-
TYS
1 stop5h 20m
Southwest
Deal found 7/5$337
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 8/206:32 pm
TYS
-
PWM
1 stop5h 09m
American Airlines
Sun 8/235:30 am
PWM
-
TYS
1 stop5h 13m
American Airlines
Deal found 7/1$348
This American Airlines deal was found by Cheapflights users on 7/1. 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 9/263:53 pm
TYS
-
PWM
1 stop6h 20m
American Airlines
Sat 10/37:00 am
PWM
-
TYS
1 stop4h 41m
American Airlines
Deal found 7/1$355
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 8/257:00 am
TYS
-
PWM
2 stops7h 38m
United Airlines
Sun 8/305:52 am
PWM
-
TYS
1 stop4h 45m
United Airlines
Deal found 6/30$371

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 July 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(United Airlines)

One-way from

$138
(American Airlines)

Popular in

November

Cheapest in

March

Average price

$396
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. 8% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 5, 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

Sat 9/5

6:50 am-9:00 pm

2 stops14h 10m

Portland

Sat 9/12

12:20 pm-5:40 pm

1 stop5h 20m

$337

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Tue 8/25

7:00 am-2:38 pm

2 stops7h 38m

Portland

Sun 8/30

5:52 am-10:37 am

1 stop4h 45m

$371

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sat 8/15

7:00 am-7:17 pm

2 stops12h 17m

Portland

Sat 8/22

5:15 am-10:37 am

1 stop5h 22m

$382

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Tue 9/22

6:00 am-7:24 pm

2 stops13h 24m

Portland

Wed 9/23

6:06 am-4:58 pm

2 stops10h 52m

$387
Quickest round-trip

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sun 8/2

5:45 am-10:07 am

1 stop4h 22m

Portland

Sun 8/9

5:15 am-10:42 am

1 stop5h 27m

$446

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sat 9/19

7:20 pm-11:59 pm

1 stop4h 39m

Portland

Sat 9/26

7:57 am-9:00 pm

2 stops13h 03m

$462

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sat 9/26

10:42 am-11:28 pm

2 stops12h 46m

Portland

Sat 10/3

7:57 am-9:00 pm

2 stops13h 03m

$468
Cheapest one-way

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Fri 7/31

3:54 pm-11:14 pm

1 stop7h 20m

$189

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Sat 8/1

1:35 pm-11:45 pm

2 stops10h 10m

$194

KnoxvillePortland

TYS - PWM

TYSPWM

Knoxville McGhee Tyson

Thu 7/30

6:05 pm-11:14 pm

1 stop5h 09m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 18 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 July.
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, March is the cheapest month in which you can book a flight from Knoxville to Portland, Maine (average of $314). Flying from Knoxville to Portland, Maine in November is currently the most expensive (average of $651). 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.

How much does it cost to fly round-trip from Knoxville to Portland, Maine?

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 July 5, 2026.
Read reviews from past customers who have flown Southwest,Delta, 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.
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
7.9
Good
4,249 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Delta
7.8
Good
8,452 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,781 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

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 7h 38m. Fly via Southwest or United Airlines 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 Delta, from $265, and Southwest, from $293. American Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Knoxville to Portland, Maine one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $139. Users have also found prices from $139 and $196 on Delta and United Airlines, respectively.

  • 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, March is the cheapest month in which you can book a flight from Knoxville to Portland, Maine (average of $314). Flying from Knoxville to Portland, Maine in November is currently the most expensive (average of $651). 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
Lewiston
Brunswick
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 July 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$258Average$447FlexibilityNo cancel feeOn-time71%
DeltaCheapest$265Average$423FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$293Average$368FlexibilityNo cancel feeOn-time63%

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