$166+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PWM
Jun 21 — Jun 281
Round-trip
1 adult, Economy
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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
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Cheapest flights from Knoxville to PortlandExplore 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 May 22, 2026.
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 May 22, 2026.
This Delta deal was found by Cheapflights users on 5/17. 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 6/166:00 am
TYS
- PWM
1 stop4h 22m
Delta
Tue 6/236:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Deal found 5/17![Delta logo]()
$331
This Delta deal was found by Cheapflights users on 5/17. 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 6/86:00 am
TYS
- PWM
1 stop4h 22m
Delta
Tue 6/166:00 am
PWM
- TYS
1 stop5h 09m
Delta
Deal found 5/17![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 5/18. 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 7/44:00 pm
TYS
- PWM
1 stop5h 35m
Delta
Tue 7/146:00 am
PWM
- TYS
1 stop7h 16m
Delta
Deal found 5/18![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 5/17. 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 6/1612:45 pm
TYS
- PWM
2 stops10h 10m
Southwest
Tue 6/233:45 pm
PWM
- TYS
1 stop5h 30m
Southwest
Deal found 5/17![Southwest logo]()
$336
This American Airlines deal was found by Cheapflights users on 5/18. 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 9/195:09 pm
TYS
- PWM
1 stop6h 32m
American Airlines
Sat 9/267:20 pm
PWM
- TYS
1 stop4h 50m
American Airlines
Deal found 5/18![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 5/17. 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 6/245:00 am
TYS
- PWM
2 stops7h 39m
American Airlines
Mon 6/295:04 pm
PWM
- TYS
1 stop4h 27m
American Airlines
Deal found 5/17![American Airlines logo]()
$340
This Southwest deal was found by Cheapflights users on 5/17. 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 7/1412:45 pm
TYS
- PWM
2 stops10h 10m
Southwest
Wed 7/225:30 am
PWM
- TYS
2 stops6h 35m
Southwest
Deal found 5/17![Southwest logo]()
$341
This Southwest deal was found by Cheapflights users on 5/18. 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 9/266:50 am
TYS
- PWM
2 stops8h 10m
Southwest
Sat 10/35:40 am
PWM
- TYS
2 stops11h 00m
Southwest
Deal found 5/18![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 5/21. 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 9/196:50 am
TYS
- PWM
1 stop7h 15m
Southwest
Wed 9/237:45 am
PWM
- TYS
2 stops11h 10m
Southwest
Deal found 5/21![Southwest logo]()
$352
This Delta deal was found by Cheapflights users on 5/20. 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 6/246:00 am
TYS
- PWM
1 stop4h 22m
Delta
Mon 6/296:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Deal found 5/20![Delta logo]()
$354
Best flights from Knoxville to PortlandDiscover carefully curated flight deals from Knoxville to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 22, 2026.
Discover carefully curated flight deals from Knoxville to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 22, 2026.
This Delta deal was found by Cheapflights users on 5/19. 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 8/175:45 am
TYS
- PWM
1 stop7h 22m
Delta
Thu 8/202:14 pm
PWM
- TYS
1 stop5h 56m
Delta
Deal found 5/19![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/20. 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 7/158:10 am
TYS
- PWM
1 stop4h 15m
Southwest
Mon 7/205:20 pm
PWM
- TYS
1 stop5h 10m
Southwest
Deal found 5/20![Southwest logo]()
$354
This United Airlines deal was found by Cheapflights users on 5/17. 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 6/27:19 pm
TYS
- PWM
1 stop4h 32m
United Airlines
Fri 6/56:00 am
PWM
- TYS
2 stops8h 27m
United Airlines
Deal found 5/17![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 5/17. 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 7/96:05 pm
TYS
- PWM
1 stop5h 09m
Delta
Mon 7/136:00 am
PWM
- TYS
1 stop5h 05m
Delta
Deal found 5/17![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/20. 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 9/267:50 am
TYS
- PWM
1 stop7h 10m
Southwest
Sat 10/33:10 pm
PWM
- TYS
1 stop4h 30m
Southwest
Deal found 5/20![Southwest logo]()
$363
This Southwest deal was found by Cheapflights users on 5/16. 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.
Fri 8/212:05 pm
TYS
- PWM
2 stops8h 20m
Southwest
Sun 8/236:10 am
PWM
- TYS
2 stops8h 50m
Southwest
Deal found 5/16![Southwest logo]()
$368
This Delta deal was found by Cheapflights users on 5/21. 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 8/36:12 pm
TYS
- PWM
1 stop5h 08m
Delta
Sat 8/156:30 am
PWM
- TYS
1 stop4h 28m
Delta
Deal found 5/21![Delta logo]()
$370
This Southwest deal was found by Cheapflights users on 5/21. 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.
Fri 8/282:05 pm
TYS
- PWM
2 stops8h 20m
Southwest
Mon 8/313:40 pm
PWM
- TYS
1 stop4h 15m
Southwest
Deal found 5/21![Southwest logo]()
$375
This Delta deal was found by Cheapflights users on 5/16. 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 8/204:38 pm
TYS
- PWM
1 stop6h 42m
Delta
Sun 8/236:30 am
PWM
- TYS
1 stop4h 28m
Delta
Deal found 5/16![Delta logo]()
$378
This Southwest deal was found by Cheapflights users on 5/18. 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 6/212:50 pm
TYS
- PWM
2 stops9h 45m
Southwest
Fri 6/57:40 am
PWM
- TYS
2 stops13h 30m
Southwest
Deal found 5/18![Southwest logo]()
$405
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated May 22, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated May 22, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/20. 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 5/2811:18 am
TYS
- PWM
1 stop5h 19m
American Airlines
Sat 6/205:10 am
PWM
- TYS
1 stop5h 38m
American Airlines
Deal found 5/20![American Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 5/18. 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 6/27:19 pm
TYS
- PWM
1 stop4h 32m
United Airlines
Fri 6/55:15 am
PWM
- TYS
1 stop5h 27m
United Airlines
Deal found 5/18![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 5/18. 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 6/212:50 pm
TYS
- PWM
2 stops9h 45m
Southwest
Fri 6/51:00 pm
PWM
- TYS
1 stop8h 10m
Southwest
Deal found 5/18![Southwest logo]()
$400
This Delta deal was found by Cheapflights users on 5/17. 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 6/86:00 am
TYS
- PWM
1 stop4h 22m
Delta
Tue 6/166:00 am
PWM
- TYS
1 stop5h 09m
Delta
Deal found 5/17![Delta logo]()
$333
This United Airlines deal was found by Cheapflights users on 5/19. 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 6/87:19 pm
TYS
- PWM
1 stop4h 32m
United Airlines
Tue 6/167:16 pm
PWM
- TYS
1 stop4h 38m
United Airlines
Deal found 5/19![United Airlines logo]()
$360
This Delta deal was found by Cheapflights users on 5/17. 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 6/166:00 am
TYS
- PWM
1 stop4h 22m
Delta
Tue 6/236:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Deal found 5/17![Delta logo]()
$331
This Southwest deal was found by Cheapflights users on 5/17. 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 6/1612:45 pm
TYS
- PWM
2 stops10h 10m
Southwest
Tue 6/233:45 pm
PWM
- TYS
1 stop5h 30m
Southwest
Deal found 5/17![Southwest logo]()
$336
This Delta deal was found by Cheapflights users on 5/18. 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 6/246:00 am
TYS
- PWM
1 stop4h 22m
Delta
Mon 6/296:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Deal found 5/18![Delta logo]()
$335
This American Airlines deal was found by Cheapflights users on 5/17. 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 6/245:00 am
TYS
- PWM
2 stops7h 39m
American Airlines
Mon 6/295:04 pm
PWM
- TYS
1 stop4h 27m
American Airlines
Deal found 5/17![American Airlines logo]()
$340
One-way flights from Knoxville to PortlandSearch for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated May 22, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated May 22, 2026.
This American Airlines deal was found by Cheapflights users on 5/21. 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.
Tue 9/86:37 pm
TYS
- PWM
1 stop5h 04m
American Airlines
Deal found 5/21![American Airlines logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 5/21. 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.
Mon 8/178:35 am
TYS
- PWM
2 stops31h 24m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$169
This Delta deal was found by Cheapflights users on 5/18. 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 7/1110:51 am
TYS
- PWM
1 stop5h 26m
Delta
Deal found 5/18![Delta logo]()
$170
This Southwest deal was found by Cheapflights users on 5/17. 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 6/3012:45 pm
TYS
- PWM
2 stops10h 10m
Southwest
Deal found 5/17![Southwest logo]()
$171
This Southwest deal was found by Cheapflights users on 5/18. 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 7/111:35 pm
TYS
- PWM
2 stops10h 05m
Southwest
Deal found 5/18![Southwest logo]()
$175
This Southwest deal was found by Cheapflights users on 5/19. 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 8/86:50 am
TYS
- PWM
2 stops14h 10m
Southwest
Deal found 5/19![Southwest logo]()
$181
This American Airlines deal was found by Cheapflights users on 5/21. 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.
Mon 8/177:16 pm
TYS
- PWM
1 stop4h 35m
American Airlines
Deal found 5/21![American Airlines logo]()
$182
This Southwest deal was found by Cheapflights users on 5/21. 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 9/102:05 pm
TYS
- PWM
2 stops8h 20m
Southwest
Deal found 5/21![Southwest logo]()
$187
This Delta deal was found by Cheapflights users on 5/18. 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.
Sun 6/286:00 am
TYS
- PWM
1 stop4h 33m
Delta
Deal found 5/18![Delta logo]()
$189
This Southwest deal was found by Cheapflights users on 5/21. 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.
Fri 9/42:05 pm
TYS
- PWM
2 stops8h 20m
Southwest
Deal found 5/21![Southwest logo]()
$194
This Southwest deal was found by Cheapflights users on 5/16. 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 7/212:35 pm
TYS
- PWM
2 stops11h 30m
Southwest
Deal found 5/16![Southwest logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 5/21. 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.
Mon 6/87:25 am
TYS
- PWM
2 stops31h 06m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$207
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 May 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $331 (Delta) |
One-way from | $166 (American Airlines) |
Popular in | November |
Cheapest in | September |
Average price | $462 |
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 May 22, 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
Cheapest round-trip
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Mon 8/17
5:45 am-1:07 pm
1 stop7h 22m
Portland
Thu 8/20
2:14 pm-8:10 pm
1 stop5h 56m
$339
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Thu 7/9
6:05 pm-11:14 pm
1 stop5h 09m
Portland
Mon 7/13
6:00 am-11:05 am
1 stop5h 05m
$339
Quickest round-trip
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Wed 7/15
8:10 am-12:25 pm
1 stop4h 15m
Portland
Mon 7/20
5:20 pm-10:30 pm
1 stop5h 10m
$354
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Sat 9/26
7:50 am-3:00 pm
1 stop7h 10m
Portland
Sat 10/3
3:10 pm-7:40 pm
1 stop4h 30m
$363
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Fri 8/21
2:05 pm-10:25 pm
2 stops8h 20m
Portland
Sun 8/23
6:10 am-3:00 pm
2 stops8h 50m
$368
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Mon 8/3
6:12 pm-11:20 pm
1 stop5h 08m
Portland
Sat 8/15
6:30 am-10:58 am
1 stop4h 28m
$370
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Fri 8/28
2:05 pm-10:25 pm
2 stops8h 20m
Portland
Mon 8/31
3:40 pm-7:55 pm
1 stop4h 15m
$375
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Thu 8/20
4:38 pm-11:20 pm
1 stop6h 42m
Portland
Sun 8/23
6:30 am-10:58 am
1 stop4h 28m
$378
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Tue 6/2
12:50 pm-10:35 pm
2 stops9h 45m
Portland
Fri 6/5
7:40 am-9:10 pm
2 stops13h 30m
$405
KnoxvillePortland
TYS - PWM
TYSPWM
Knoxville McGhee Tyson
Tue 6/2
7:19 pm-11:51 pm
1 stop4h 32m
Portland
Fri 6/5
6:00 am-2:27 pm
2 stops8h 27m
$421
Showing 1-10 of 21 resultsSorted by cheapest first
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 May.
| 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 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.
TYS-PWM
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, September is the cheapest month in which you can book a flight from Knoxville to Portland, Maine (average of $298). 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 May 22, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited 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.
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsNorth Conway
Brunswick
Lewiston
Conway
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Knoxville to Portland
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Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Knoxville to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Knoxville and Portland flights
Browse other Knoxville and Portland flight options. Last updated on May 22, 2026.
Other flights from Knoxville
Browse through other flights departing from Knoxville. Flights are based on user searches made on Cheapflights and were last updated on May 22, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 22, 2026.
Top 4 airlines flying from Knoxville to Portland
Discover the top 4 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 May 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$258 | Average$389 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$408 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$258 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$293 | Average$368 | FlexibilityNo cancel fee | On-time63% |