$148+ 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
Jul 15 — Jul 221
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
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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 June 15, 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 June 15, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 8/2712:47 pm
PWM
- TYS
1 stop4h 55m
Delta
Mon 8/316:00 am
TYS
- PWM
1 stop7h 07m
Delta
Deal found 6/10![Delta logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/13. 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 9/84:57 pm
PWM
- TYS
1 stop7h 26m
United Airlines
Tue 9/156:00 am
TYS
- PWM
2 stops8h 38m
United Airlines
Deal found 6/13![United Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 6/10. 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 8/272:10 pm
PWM
- TYS
1 stop4h 25m
Southwest
Mon 8/3112:40 pm
TYS
- PWM
2 stops9h 45m
Southwest
Deal found 6/10![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 6/13. 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 7/36:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Wed 7/83:54 pm
TYS
- PWM
1 stop7h 20m
Delta
Deal found 6/13![Delta logo]()
$313
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/295:15 am
PWM
- TYS
1 stop5h 22m
United Airlines
Sun 9/65:45 am
TYS
- PWM
2 stops8h 10m
United Airlines
Deal found 6/11![United Airlines logo]()
$318
This American Airlines deal was found by Cheapflights users on 6/12. 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 8/275:30 am
PWM
- TYS
1 stop5h 13m
American Airlines
Mon 8/316:57 am
TYS
- PWM
1 stop7h 24m
American Airlines
Deal found 6/12![American Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 6/11. 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 8/295:40 am
PWM
- TYS
2 stops9h 00m
Southwest
Sun 9/68:55 am
TYS
- PWM
2 stops12h 50m
Southwest
Deal found 6/11![Southwest logo]()
$324
This American Airlines deal was found by Cheapflights users on 6/11. 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 7/32:25 pm
PWM
- TYS
1 stop5h 13m
American Airlines
Wed 7/812:15 pm
TYS
- PWM
1 stop4h 21m
American Airlines
Deal found 6/11![American Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 6/10. 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 7/33:10 pm
PWM
- TYS
1 stop7h 20m
Southwest
Wed 7/812:45 pm
TYS
- PWM
2 stops10h 15m
Southwest
Deal found 6/10![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 6/13. 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 9/87:45 am
PWM
- TYS
2 stops11h 10m
Southwest
Tue 9/1512:45 pm
TYS
- PWM
2 stops8h 25m
Southwest
Deal found 6/13![Southwest logo]()
$337
This Southwest deal was found by Cheapflights users on 6/11. 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.
Mon 10/195:30 am
PWM
- TYS
2 stops9h 50m
Southwest
Sat 10/247:00 am
TYS
- PWM
1 stop7h 30m
Southwest
Deal found 6/11![Southwest logo]()
$341
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 June 15, 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 June 15, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 10/196:00 am
PWM
- TYS
1 stop5h 06m
Delta
Sat 10/246:10 am
TYS
- PWM
1 stop4h 51m
Delta
Deal found 6/10![Delta logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/13. 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 9/84:57 pm
PWM
- TYS
1 stop7h 26m
United Airlines
Tue 9/156:00 am
TYS
- PWM
2 stops8h 38m
United Airlines
Deal found 6/13![United Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 6/10. 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 8/272:10 pm
PWM
- TYS
1 stop4h 25m
Southwest
Mon 8/3112:40 pm
TYS
- PWM
2 stops9h 45m
Southwest
Deal found 6/10![Southwest logo]()
$301
This American Airlines deal was found by Cheapflights users on 6/14. 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 7/35:18 pm
PWM
- TYS
1 stop4h 15m
American Airlines
Wed 7/87:00 am
TYS
- PWM
1 stop5h 11m
American Airlines
Deal found 6/14![American Airlines logo]()
$313
This Southwest deal was found by Cheapflights users on 6/11. 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 8/295:40 am
PWM
- TYS
2 stops9h 00m
Southwest
Sun 9/68:55 am
TYS
- PWM
2 stops12h 50m
Southwest
Deal found 6/11![Southwest logo]()
$324
This United Airlines deal was found by Cheapflights users on 6/14. 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 11/177:22 pm
PWM
- TYS
1 stop4h 15m
United Airlines
Wed 11/187:35 pm
TYS
- PWM
1 stop4h 24m
United Airlines
Deal found 6/14![United Airlines logo]()
$375
This Southwest deal was found by Cheapflights users on 6/11. 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.
Mon 10/195:30 am
PWM
- TYS
2 stops9h 50m
Southwest
Sat 10/247:00 am
TYS
- PWM
1 stop7h 30m
Southwest
Deal found 6/11![Southwest logo]()
$341
This United Airlines deal was found by Cheapflights users on 6/14. 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 8/275:15 am
PWM
- TYS
2 stops11h 43m
United Airlines
Mon 8/317:00 am
TYS
- PWM
2 stops12h 24m
United Airlines
Deal found 6/14![United Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 6/13. 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 8/15:15 am
PWM
- TYS
1 stop5h 27m
United Airlines
Mon 8/37:19 pm
TYS
- PWM
1 stop4h 32m
United Airlines
Deal found 6/13![United Airlines logo]()
$409
This Southwest deal was found by Cheapflights users on 6/12. 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 7/3110:25 am
PWM
- TYS
2 stops10h 50m
Southwest
Mon 8/312:35 pm
TYS
- PWM
2 stops9h 40m
Southwest
Deal found 6/12![Southwest logo]()
$413
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/15:15 am
PWM
- TYS
1 stop5h 27m
United Airlines
Thu 8/65:45 am
TYS
- PWM
2 stops7h 40m
United Airlines
Deal found 6/11![United Airlines logo]()
$439
Last-minute flights from Portland to KnoxvilleDiscover last-minute flight deals from Portland to Knoxville. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Knoxville. Data last updated June 15, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/13. 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 7/36:57 pm
PWM
- TYS
1 stop4h 57m
Delta
Wed 7/83:54 pm
TYS
- PWM
1 stop7h 20m
Delta
Deal found 6/13![Delta logo]()
$313
This American Airlines deal was found by Cheapflights users on 6/11. 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 7/32:25 pm
PWM
- TYS
1 stop5h 13m
American Airlines
Wed 7/812:15 pm
TYS
- PWM
1 stop4h 21m
American Airlines
Deal found 6/11![American Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 6/10. 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 7/33:10 pm
PWM
- TYS
1 stop7h 20m
Southwest
Tue 7/712:45 pm
TYS
- PWM
2 stops10h 15m
Southwest
Deal found 6/10![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 6/10. 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 7/37:40 am
PWM
- TYS
2 stops13h 30m
Southwest
Wed 7/812:45 pm
TYS
- PWM
2 stops10h 15m
Southwest
Deal found 6/10![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 6/10. 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 7/103:20 pm
PWM
- TYS
1 stop7h 15m
Southwest
Fri 7/1712:35 pm
TYS
- PWM
2 stops11h 35m
Southwest
Deal found 6/10![Southwest logo]()
$388
This Southwest deal was found by Cheapflights users on 6/13. 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 7/105:20 pm
PWM
- TYS
1 stop5h 15m
Southwest
Thu 7/1612:35 pm
TYS
- PWM
2 stops11h 35m
Southwest
Deal found 6/13![Southwest logo]()
$402
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Sun 7/125:15 am
PWM
- TYS
1 stop5h 27m
United Airlines
Sat 7/187:19 pm
TYS
- PWM
1 stop4h 32m
United Airlines
Deal found 6/12![United Airlines logo]()
$404
This Southwest deal was found by Cheapflights users on 6/13. 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 7/145:30 am
PWM
- TYS
2 stops6h 35m
Southwest
Thu 7/1612:35 pm
TYS
- PWM
2 stops11h 35m
Southwest
Deal found 6/13![Southwest logo]()
$346
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/316:01 pm
PWM
- TYS
1 stop5h 50m
American Airlines
Mon 8/310:00 am
TYS
- PWM
1 stop7h 09m
American Airlines
Deal found 6/12![American Airlines logo]()
$377
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 June 15, 2026.
Search for one-way flight options from Portland to Knoxville. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This American Airlines deal was found by Cheapflights users on 6/11. 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 8/136:00 am
PWM
- TYS
1 stop4h 45m
American Airlines
Deal found 6/11![American Airlines logo]()
$148
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 9/285:55 am
PWM
- TYS
2 stops11h 15m
Southwest
Deal found 6/10![Southwest logo]()
$153
This Delta deal was found by Cheapflights users on 6/14. 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 10/256:00 am
PWM
- TYS
1 stop5h 06m
Delta
Deal found 6/14![Delta logo]()
$189
This United Airlines deal was found by Cheapflights users on 6/14. 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 8/205:15 am
PWM
- TYS
2 stops11h 43m
United Airlines
Deal found 6/14![United Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/177:00 am
PWM
- TYS
2 stops11h 25m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/179:52 am
PWM
- TYS
1 stop13h 41m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$206
This Southwest deal was found by Cheapflights users on 6/11. 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.
Sun 9/276:10 am
PWM
- TYS
2 stops10h 00m
Southwest
Deal found 6/11![Southwest logo]()
$214
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 9/276:00 am
PWM
- TYS
1 stop4h 38m
American Airlines
Deal found 6/11![American Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/177:35 pm
PWM
- TYS
1 stop4h 24m
United Airlines
Deal found 6/12![United Airlines logo]()
$230
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 June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $295 (Delta) |
One-way from | $148 (American Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $475 |
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 June 15, 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
Mon 10/19
6:00 am-11:06 am
1 stop5h 06m
Knoxville McGhee Tyson
Sat 10/24
6:10 am-11:01 am
1 stop4h 51m
$295
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Tue 9/8
4:57 pm-12:23 am
1 stop7h 26m
Knoxville McGhee Tyson
Tue 9/15
6:00 am-2:38 pm
2 stops8h 38m
$300
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Thu 8/27
2:10 pm-6:35 pm
1 stop4h 25m
Knoxville McGhee Tyson
Mon 8/31
12:40 pm-10:25 pm
2 stops9h 45m
$301
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Fri 7/3
5:18 pm-9:33 pm
1 stop4h 15m
Knoxville McGhee Tyson
Wed 7/8
7:00 am-12:11 pm
1 stop5h 11m
$313
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Sat 8/29
5:40 am-2:40 pm
2 stops9h 00m
Knoxville McGhee Tyson
Sun 9/6
8:55 am-9:45 pm
2 stops12h 50m
$324
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Mon 10/19
5:30 am-3:20 pm
2 stops9h 50m
Knoxville McGhee Tyson
Sat 10/24
7:00 am-2:30 pm
1 stop7h 30m
$341
Quickest round-trip
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Tue 11/17
7:22 pm-11:37 pm
1 stop4h 15m
Knoxville McGhee Tyson
Wed 11/18
7:35 pm-11:59 pm
1 stop4h 24m
$375
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Thu 8/27
5:15 am-4:58 pm
2 stops11h 43m
Knoxville McGhee Tyson
Mon 8/31
7:00 am-7:24 pm
2 stops12h 24m
$409
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Sat 8/1
5:15 am-10:42 am
1 stop5h 27m
Knoxville McGhee Tyson
Mon 8/3
7:19 pm-11:51 pm
1 stop4h 32m
$409
PortlandKnoxville
PWM - TYS
PWMTYS
Portland
Fri 7/31
10:25 am-9:15 pm
2 stops10h 50m
Knoxville McGhee Tyson
Mon 8/3
12:35 pm-10:15 pm
2 stops9h 40m
$413
Showing 1-10 of 21 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 June.
| 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?
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 June 15, 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.
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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.
Traveling to a place near Knoxville?
Book flights to Knoxville if you plan to visit one of these locationsCherokee
Crossville
Morristown
Bryson City
Murphy
Alcoa
Oak Ridge
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Portland to Knoxville
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Complete your trip to Knoxville by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Portland to Knoxville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Knoxville
Explore flights to Knoxville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Portland and Knoxville flights
Browse other Portland and Knoxville flight options. Last updated on June 15, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$258 | Average$388 | 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% |