$150+ Cheap flights from Knoxville to Portland (TYS - PDX)
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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Sep 14 — Sep 211
Round-trip
1 adult, Economy
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Find cheap flights from Knoxville to Portland 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 Knoxville to Portland
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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 August 15, 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 August 15, 2026.
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Wed 10/286:00 am -
1 stop8h 05m
Mon 11/29:50 pm -
1 stop8h 55m
Deal found 8/11![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/24:50 pm -
1 stop7h 15m
Thu 9/1010:56 am -
2 stops10h 03m
Deal found 8/12![United Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 9/86:52 pm -
1 stop8h 07m
Thu 9/1011:08 pm -
1 stop8h 42m
Deal found 8/12![American Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/11. 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.
Fri 10/301:50 pm -
2 stops11h 30m
Tue 11/36:40 am -
2 stops10h 05m
Deal found 8/11![Southwest logo]()
$310
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Sat 9/511:40 am -
1 stop9h 20m
Sat 9/126:00 am -
1 stop7h 42m
Deal found 8/11![American Airlines logo]()
$317
This American Airlines deal was found by Cheapflights users on 8/11. 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 10/306:00 am -
1 stop10h 32m
Mon 11/211:09 pm -
1 stop8h 57m
Deal found 8/11![American Airlines logo]()
$331
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:40 am -
1 stop9h 20m
Sat 9/511:30 pm -
1 stop10h 07m
Deal found 8/10![American Airlines logo]()
$335
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/95:35 pm -
1 stop8h 48m
Wed 9/167:00 am -
1 stop6h 42m
Deal found 8/12![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:00 am -
1 stop7h 28m
Sat 9/510:50 am -
2 stops10h 09m
Deal found 8/10![United Airlines logo]()
$340
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 August 15, 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 August 15, 2026.
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:40 pm -
1 stop7h 47m
Sat 11/149:00 am -
2 stops9h 57m
Deal found 8/10![United Airlines logo]()
$346
This Southwest deal was found by Cheapflights users on 8/15. 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 10/246:40 am -
2 stops13h 10m
Tue 10/276:15 am -
2 stops10h 50m
Deal found 8/15![Southwest logo]()
$353
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/68:09 am -
1 stop7h 29m
Sat 11/145:47 pm -
2 stops13h 03m
Deal found 8/11![Delta logo]()
$443
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 10/311:55 pm -
1 stop9h 20m
Thu 11/511:30 pm -
1 stop7h 23m
Deal found 8/14![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 11/125:05 pm -
1 stop9h 04m
Sun 11/158:30 am -
1 stop8h 06m
Deal found 8/11![United Airlines logo]()
$383
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Mon 9/146:02 pm -
1 stop7h 50m
Sat 9/197:02 am -
2 stops10h 22m
Deal found 8/14![United Airlines logo]()
$390
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 10/296:45 am -
1 stop8h 02m
Mon 11/27:26 pm -
2 stops11h 27m
Deal found 8/11![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 10/289:45 am -
2 stops16h 14m
Mon 11/27:26 pm -
2 stops11h 27m
Deal found 8/13![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 10/66:00 am -
2 stops11h 27m
Mon 10/1210:33 pm -
2 stops13h 09m
Deal found 8/12![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 8/11. 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 9/59:45 am -
2 stops14h 20m
Sat 9/127:00 am -
2 stops12h 49m
Deal found 8/11![United Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/27:00 am -
1 stop7h 28m
Sat 9/511:02 pm -
1 stop7h 55m
Deal found 8/13![United Airlines logo]()
$445
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated August 15, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated August 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:40 am -
1 stop9h 20m
Sat 9/511:30 pm -
1 stop10h 07m
Deal found 8/10![American Airlines logo]()
$335
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:00 am -
1 stop7h 28m
Sat 9/510:50 am -
2 stops10h 09m
Deal found 8/10![United Airlines logo]()
$340
This Southwest deal was found by Cheapflights users on 8/10. 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 8/315:45 pm -
2 stops8h 55m
Sat 9/511:30 pm -
2 stops11h 20m
Deal found 8/10![Southwest logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:40 pm -
2 stops10h 05m
Sat 9/510:35 am -
1 stop7h 18m
Deal found 8/10![United Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/26:52 pm -
1 stop8h 07m
Thu 9/1011:08 pm -
1 stop8h 42m
Deal found 8/12![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/24:50 pm -
1 stop7h 15m
Thu 9/1010:56 am -
2 stops10h 03m
Deal found 8/12![United Airlines logo]()
$304
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/27:00 am -
1 stop7h 28m
Sun 9/65:00 am -
1 stop7h 54m
Deal found 8/12![United Airlines logo]()
$349
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Sat 9/511:40 am -
1 stop9h 20m
Sat 9/126:00 am -
1 stop7h 42m
Deal found 8/11![American Airlines logo]()
$317
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 9/86:52 pm -
1 stop8h 07m
Sat 9/129:44 pm -
1 stop7h 46m
Deal found 8/12![American Airlines logo]()
$307
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:52 pm -
1 stop8h 07m
Thu 9/1011:08 pm -
1 stop8h 42m
Deal found 8/13![American Airlines logo]()
$334
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/95:35 pm -
1 stop8h 48m
Wed 9/167:00 am -
1 stop6h 42m
Deal found 8/12![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/302:43 pm -
1 stop7h 37m
Fri 10/211:06 pm -
1 stop7h 38m
Deal found 8/12![American Airlines logo]()
$341
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 August 15, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated August 15, 2026.
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 9/154:48 pm -
1 stop10h 19m
Deal found 8/12![American Airlines logo]()
$150
This Southwest deal was found by Cheapflights users on 8/12. 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.
Tue 9/155:30 pm -
2 stops8h 45m
Deal found 8/12![Southwest logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Tue 9/153:21 pm -
3 stops45h 46m
Deal found 8/12![Multiple Airlines logo]()
$191
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/242:55 pm -
1 stop10h 16m
Deal found 8/13![American Airlines logo]()
$234
This Southwest deal was found by Cheapflights users on 8/13. 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 11/243:45 pm -
2 stops11h 45m
Deal found 8/13![Southwest logo]()
$249
This United Airlines deal was found by Cheapflights users on 8/13. 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 11/246:45 am -
3 stops14h 39m
Deal found 8/13![United Airlines logo]()
$2,011
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 (PDX). 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 August 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (American Airlines) |
One-way from | $150 (American Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $599 |
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 August 15, 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 Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Fri 11/6
5:40 pm-10:27 pm
1 stop7h 47m
Portland
Sat 11/14
9:00 am-9:57 pm
2 stops9h 57m
$346
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Sat 10/24
6:40 am-4:50 pm
2 stops13h 10m
Portland
Tue 10/27
6:15 am-8:05 pm
2 stops10h 50m
$353
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Sat 10/31
1:55 pm-8:15 pm
1 stop9h 20m
Portland
Thu 11/5
11:30 pm-9:53 am
1 stop7h 23m
$358
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Thu 11/12
5:05 pm-11:09 pm
1 stop9h 04m
Portland
Sun 11/15
8:30 am-7:36 pm
1 stop8h 06m
$383
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Mon 9/14
6:02 pm-10:52 pm
1 stop7h 50m
Portland
Sat 9/19
7:02 am-8:24 pm
2 stops10h 22m
$390
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Thu 10/29
6:45 am-11:47 am
1 stop8h 02m
Portland
Mon 11/2
7:26 pm-9:53 am
2 stops11h 27m
$414
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Wed 10/28
9:45 am-10:59 pm
2 stops16h 14m
Portland
Mon 11/2
7:26 pm-9:53 am
2 stops11h 27m
$419
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Tue 10/6
6:00 am-2:27 pm
2 stops11h 27m
Portland
Mon 10/12
10:33 pm-2:42 pm
2 stops13h 09m
$419
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Sat 9/5
9:45 am-9:05 pm
2 stops14h 20m
Portland
Sat 9/12
7:00 am-10:49 pm
2 stops12h 49m
$437
KnoxvillePortland
TYS Knoxville McGhee Tyson - PDX Portland
TYSPDX
Knoxville McGhee Tyson
Fri 11/6
8:09 am-12:38 pm
1 stop7h 29m
Portland
Sat 11/14
5:47 pm-9:50 am
2 stops13h 03m
$443
Showing 1-10 of 16 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 August.
| 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 flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Portland flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-Portland 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 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-PDX
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
How far ahead should I book a flight from Knoxville to Portland?
Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Knoxville to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Knoxville to Portland?
Currently, February is the cheapest month in which you can book a flight from Knoxville to Portland (average of $401). Flying from Knoxville to Portland in December is currently the most expensive (average of $625). 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?
Airfare is below average for this route at the moment.
Knoxville to Portland flights typically cost between $525 and $662 in October.The cheapest round-trip price found within the last 5 days was $299 on American Airlines (Oct 28-Nov 2).
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 August 15, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from Knoxville to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Boarding
8.1
Food
7.2
Overall
7.8
Crew
8.5
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 locationsBeaverton
Seaside
Lincoln City
Durham
Longview
Lake Oswego
Hillsboro
Kelso
Clackamas
Troutdale
Vancouver
Cannon Beach
McMinnville
The Dalles
Wilsonville
Stevenson
Tillamook
Astoria
Gresham
Silverton
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Search flights from Knoxville to Portland by cabin class
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 August 15, 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 August 15, 2026.
Popular flight searches
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 August 15, 2026.
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 August 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$298 | Average$509 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$536 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$354 | Average$594 | FlexibilityNo cancel fee | On-timeN/A |