$138+ Cheap flights from Portland, ME to Knoxville (PWM - TYS)
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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — TYS
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Knoxville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to Knoxville
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Best
Last-minute
One-way
Cheapest flights from Portland to KnoxvilleExplore the most affordable flight options available from Portland to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
Explore the most affordable flight options available from Portland to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
This Delta deal was found by Cheapflights users on 7/23. 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.
Thu 8/276:05 am
PWM
- TYS
1 stop7h 29m
Delta
Mon 8/314:38 pm
TYS
- PWM
1 stop6h 35m
Delta
Deal found 7/23![Delta logo]()
$275
This United Airlines deal was found by Cheapflights users on 7/26. 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 8/259:49 am
PWM
- TYS
2 stops11h 04m
United Airlines
Tue 9/19:45 am
TYS
- PWM
1 stop4h 53m
United Airlines
Deal found 7/26![United Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 7/22. 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 10/191:52 pm
PWM
- TYS
1 stop7h 18m
Delta
Sat 10/246:00 am
TYS
- PWM
1 stop7h 04m
Delta
Deal found 7/22![Delta logo]()
$285
This Delta deal was found by Cheapflights users on 7/24. 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 9/56:10 am
PWM
- TYS
1 stop4h 48m
Delta
Sun 9/67:15 am
TYS
- PWM
1 stop4h 47m
Delta
Deal found 7/24![Delta logo]()
$290
This Southwest deal was found by Cheapflights users on 7/24. 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 9/305:45 am
PWM
- TYS
2 stops13h 15m
Southwest
Tue 10/61:00 pm
TYS
- PWM
2 stops9h 35m
Southwest
Deal found 7/24![Southwest logo]()
$313
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Mon 8/246:03 am
PWM
- TYS
1 stop7h 14m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops7h 38m
United Airlines
Deal found 7/25![United Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 8/255:45 am
PWM
- TYS
2 stops13h 10m
Southwest
Tue 9/112:45 pm
TYS
- PWM
2 stops8h 25m
Southwest
Deal found 7/26![Southwest logo]()
$323
This Delta deal was found by Cheapflights users on 7/23. 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.
Tue 9/86:00 am
PWM
- TYS
1 stop4h 44m
Delta
Sun 9/134:40 pm
TYS
- PWM
1 stop6h 48m
Delta
Deal found 7/23![Delta logo]()
$331
This Delta deal was found by Cheapflights users on 7/24. 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.
Thu 9/32:14 pm
PWM
- TYS
1 stop7h 46m
Delta
Sat 9/54:15 pm
TYS
- PWM
1 stop5h 18m
Delta
Deal found 7/24![Delta logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:00 am
PWM
- TYS
2 stops25h 41m
Multiple Airlines
Tue 9/1510:29 am
TYS
- PWM
1 stop23h 59m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 7/24. 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.
Thu 9/312:47 pm
PWM
- TYS
1 stop4h 55m
Delta
Sun 9/611:38 am
TYS
- PWM
1 stop4h 23m
Delta
Deal found 7/24![Delta logo]()
$346
This Southwest deal was found by Cheapflights users on 7/23. 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 9/95:45 am
PWM
- TYS
2 stops13h 15m
Southwest
Mon 9/141:00 pm
TYS
- PWM
2 stops9h 30m
Southwest
Deal found 7/23![Southwest logo]()
$347
Best flights from Portland to KnoxvilleDiscover carefully curated flight deals from Portland to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated flight deals from Portland to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This Delta deal was found by Cheapflights users on 7/23. 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.
Wed 9/96:30 am
PWM
- TYS
1 stop4h 34m
Delta
Mon 9/145:15 pm
TYS
- PWM
1 stop6h 02m
Delta
Deal found 7/23![Delta logo]()
$275
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Mon 8/246:03 am
PWM
- TYS
1 stop7h 14m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops7h 38m
United Airlines
Deal found 7/25![United Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 7/23. 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 9/95:45 am
PWM
- TYS
2 stops13h 15m
Southwest
Mon 9/141:00 pm
TYS
- PWM
2 stops9h 30m
Southwest
Deal found 7/23![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 7/24. 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 9/56:10 am
PWM
- TYS
1 stop4h 48m
Delta
Sat 9/54:15 pm
TYS
- PWM
1 stop5h 18m
Delta
Deal found 7/24![Delta logo]()
$285
This Delta deal was found by Cheapflights users on 7/22. 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 10/191:52 pm
PWM
- TYS
1 stop7h 18m
Delta
Sat 10/246:00 am
TYS
- PWM
1 stop7h 04m
Delta
Deal found 7/22![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sat 10/318:45 am
PWM
- TYS
1 stop8h 14m
United Airlines
Wed 11/46:45 am
TYS
- PWM
1 stop7h 31m
United Airlines
Deal found 7/26![United Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/277:35 pm
PWM
- TYS
1 stop4h 24m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops7h 38m
United Airlines
Deal found 7/22![United Airlines logo]()
$360
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 9/46:05 am
PWM
- TYS
1 stop7h 29m
Delta
Sat 9/55:00 pm
TYS
- PWM
1 stop4h 31m
Delta
Deal found 7/24![Delta logo]()
$341
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated July 27, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/56:00 am
PWM
- TYS
1 stop4h 45m
American Airlines
Wed 8/127:31 pm
TYS
- PWM
1 stop4h 16m
American Airlines
Deal found 7/22![American Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/135:15 am
PWM
- TYS
2 stops11h 43m
United Airlines
Mon 8/177:00 am
TYS
- PWM
1 stop7h 34m
United Airlines
Deal found 7/23![United Airlines logo]()
$372
This Delta deal was found by Cheapflights users on 7/24. 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.
Thu 8/132:14 pm
PWM
- TYS
1 stop7h 46m
Delta
Mon 8/175:15 pm
TYS
- PWM
1 stop6h 15m
Delta
Deal found 7/24![Delta logo]()
$391
This American Airlines deal was found by Cheapflights users on 7/24. 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.
Fri 8/147:05 am
PWM
- TYS
1 stop6h 26m
American Airlines
Tue 8/1811:08 am
TYS
- PWM
1 stop6h 58m
American Airlines
Deal found 7/24![American Airlines logo]()
$351
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 8/1411:01 am
PWM
- TYS
1 stop5h 32m
Delta
Mon 8/175:15 pm
TYS
- PWM
1 stop6h 15m
Delta
Deal found 7/24![Delta logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:00 am
PWM
- TYS
2 stops27h 20m
Multiple Airlines
Sun 8/161:33 pm
TYS
- PWM
1 stop19h 39m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Mon 8/246:03 am
PWM
- TYS
1 stop7h 14m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops7h 38m
United Airlines
Deal found 7/25![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 7/26. 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 8/259:49 am
PWM
- TYS
2 stops11h 04m
United Airlines
Tue 9/19:45 am
TYS
- PWM
1 stop4h 53m
United Airlines
Deal found 7/26![United Airlines logo]()
$280
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 8/255:45 am
PWM
- TYS
2 stops13h 10m
Southwest
Tue 9/112:45 pm
TYS
- PWM
2 stops8h 25m
Southwest
Deal found 7/26![Southwest logo]()
$323
This Delta deal was found by Cheapflights users on 7/23. 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.
Thu 8/276:05 am
PWM
- TYS
1 stop7h 29m
Delta
Mon 8/314:38 pm
TYS
- PWM
1 stop6h 35m
Delta
Deal found 7/23![Delta logo]()
$275
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/277:35 pm
PWM
- TYS
1 stop4h 24m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops7h 38m
United Airlines
Deal found 7/22![United Airlines logo]()
$360
One-way flights from Portland to KnoxvilleSearch for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/135:30 am
PWM
- TYS
1 stop5h 13m
American Airlines
Deal found 7/22![American Airlines logo]()
$138
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 8/255:45 am
PWM
- TYS
2 stops13h 10m
Southwest
Deal found 7/26![Southwest logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:00 am
PWM
- TYS
2 stops9h 48m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$194
This Delta deal was found by Cheapflights users on 7/26. 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.
Thu 8/132:14 pm
PWM
- TYS
1 stop7h 46m
Delta
Deal found 7/26![Delta logo]()
$244
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/135:15 am
PWM
- TYS
2 stops11h 43m
United Airlines
Deal found 7/23![United Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:22 pm
PWM
- TYS
2 stops26h 02m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$298
This American Airlines deal was found by Cheapflights users on 7/26. 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 8/61:25 pm
PWM
- TYS
1 stop5h 35m
American Airlines
Deal found 7/26![American Airlines logo]()
$349
Find flight deals from Portland to Knoxville
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Knoxville (TYS). 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 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $275 (Delta) |
One-way from | $138 (American Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $441 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to Knoxville 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 27, 2026.
Use the filters below to find and compare flights from Portland to Knoxville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Wed 9/9
6:30 am-11:04 am
1 stop4h 34m
Knoxville McGhee Tyson
Mon 9/14
5:15 pm-11:17 pm
1 stop6h 02m
$275
Quickest round-trip
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Sat 9/5
6:10 am-10:58 am
1 stop4h 48m
Knoxville McGhee Tyson
Sat 9/5
4:15 pm-9:33 pm
1 stop5h 18m
$285
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Mon 10/19
1:52 pm-9:10 pm
1 stop7h 18m
Knoxville McGhee Tyson
Sat 10/24
6:00 am-1:04 pm
1 stop7h 04m
$285
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Mon 8/24
6:03 am-1:17 pm
1 stop7h 14m
Knoxville McGhee Tyson
Mon 8/31
7:00 am-2:38 pm
2 stops7h 38m
$314
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Fri 9/4
6:05 am-1:34 pm
1 stop7h 29m
Knoxville McGhee Tyson
Sat 9/5
5:00 pm-9:31 pm
1 stop4h 31m
$341
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Wed 9/9
5:45 am-7:00 pm
2 stops13h 15m
Knoxville McGhee Tyson
Mon 9/14
1:00 pm-10:30 pm
2 stops9h 30m
$347
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Sat 10/31
8:45 am-4:59 pm
1 stop8h 14m
Knoxville McGhee Tyson
Wed 11/4
6:45 am-2:16 pm
1 stop7h 31m
$355
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Thu 8/27
7:35 pm-11:59 pm
1 stop4h 24m
Knoxville McGhee Tyson
Mon 8/31
7:00 am-2:38 pm
2 stops7h 38m
$360
Cheapest one-way
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Thu 9/10
6:00 am-12:51 pm
1 stop6h 51m
$138
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Thu 8/13
5:30 am-10:43 am
1 stop5h 13m
$138
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Portland to Knoxville
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 Portland to Knoxville in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland, Maine-Knoxville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Knoxville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Knoxville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland, Maine-Knoxville 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 Portland, Maine-Knoxville 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 Portland to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville from Portland with our price prediction graph.
PWM-TYS
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 Portland to Knoxville
What is the cheapest month to book a flight from Portland, Maine to Knoxville?
Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Knoxville (average of $285). Flying from Portland, Maine to Knoxville in December is currently the most expensive (average of $724). 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 Portland, Maine to Knoxville?
Airfare is below average for this route at the moment.
Portland, Maine to Knoxville flights typically cost between $288 and $358 in August.The cheapest round-trip price found within the last 5 days was $275 on Delta (Aug 27-Aug 31).
Reviews of airlines servicing Knoxville
Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated July 27, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Portland to Knoxville. 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.
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Portland to Knoxville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top 4 airlines flying from Portland to Knoxville
Discover the top 4 airlines that operate flights from Portland to Knoxville. 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 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$278 | Average$376 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$278 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$278 | Average$441 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$293 | Average$413 | FlexibilityNo cancel fee | On-time63% |