$164+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PDX
Sep 3 — Sep 101
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
Cheapest
Best
Last-minute
One-way
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 4, 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 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Mon 8/246:17 pm -
2 stops17h 18m
Deal found 8/3![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Fri 8/285:56 pm -
2 stops23h 06m
Deal found 8/3![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Thu 8/271:47 pm -
2 stops20h 18m
Deal found 8/3![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Tue 8/255:56 pm -
2 stops18h 03m
Deal found 8/3![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/208:00 am -
2 stops36h 11m
Wed 8/265:56 pm -
1 stop16h 53m
Deal found 8/3![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop13h 11m
Thu 9/312:20 pm -
2 stops31h 36m
Deal found 7/30![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/208:00 am -
2 stops36h 11m
Thu 8/271:47 pm -
1 stop28h 59m
Deal found 8/3![Multiple Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/229:00 am -
1 stop9h 01m
Wed 8/2610:35 am -
1 stop7h 18m
Deal found 7/30![United Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am -
1 stop7h 28m
Sat 9/1211:02 pm -
1 stop7h 52m
Deal found 8/2![United Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 10/256:30 am -
1 stop13h 05m
Thu 10/299:03 pm -
1 stop21h 46m
Deal found 8/3![Multiple Airlines logo]()
$365
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 4, 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 4, 2026.
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/229:00 am -
1 stop9h 01m
Wed 8/2610:35 am -
1 stop7h 18m
Deal found 7/30![United Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:40 am -
2 stops14h 25m
Thu 11/55:00 am -
2 stops10h 45m
Deal found 7/30![Southwest logo]()
$420
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:09 pm -
2 stops10h 27m
Thu 9/177:25 am -
1 stop9h 36m
Deal found 7/30![American Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:00 am -
1 stop8h 33m
Sat 10/178:25 am -
1 stop8h 54m
Deal found 7/30![United Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 8/3. 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 10/214:20 pm -
1 stop8h 50m
Mon 10/2611:35 pm -
2 stops9h 45m
Deal found 8/3![Southwest logo]()
$428
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:05 pm -
1 stop9h 04m
Sun 11/151:15 pm -
1 stop6h 14m
Deal found 7/30![United Airlines logo]()
$425
This Southwest deal was found by Cheapflights users on 7/31. 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
Mon 9/2111:30 pm -
2 stops9h 35m
Deal found 7/31![Southwest logo]()
$433
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:00 am -
1 stop7h 14m
Wed 9/3010:43 am -
1 stop7h 06m
Deal found 7/30![United Airlines logo]()
$432
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:55 pm -
2 stops11h 20m
Tue 9/811:30 pm -
2 stops9h 35m
Deal found 8/2![Southwest logo]()
$433
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:45 am -
2 stops11h 05m
Tue 9/15:00 am -
1 stop7h 54m
Deal found 7/30![United Airlines logo]()
$478
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:55 pm -
2 stops9h 30m
Sat 10/177:05 pm -
2 stops14h 05m
Deal found 7/30![Southwest logo]()
$493
Last-minute flights from Knoxville to PortlandDiscover last-minute flight deals from Knoxville to Portland. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Portland. Data last updated August 4, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/208:00 am -
2 stops36h 11m
Wed 8/265:56 pm -
1 stop16h 53m
Deal found 8/3![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/208:00 am -
2 stops36h 11m
Thu 8/271:47 pm -
1 stop28h 59m
Deal found 8/3![Multiple Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/229:00 am -
1 stop9h 01m
Wed 8/2610:35 am -
1 stop7h 18m
Deal found 7/30![United Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Mon 8/246:17 pm -
2 stops17h 18m
Deal found 8/3![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Fri 8/285:56 pm -
2 stops23h 06m
Deal found 8/3![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Thu 8/271:47 pm -
2 stops20h 18m
Deal found 8/3![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sun 8/237:00 am -
1 stop13h 11m
Tue 8/255:56 pm -
2 stops18h 03m
Deal found 8/3![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop13h 11m
Thu 9/312:20 pm -
2 stops31h 36m
Deal found 7/30![Multiple Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am -
1 stop7h 28m
Sat 9/1211:02 pm -
1 stop7h 52m
Deal found 8/2![United Airlines logo]()
$364
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 4, 2026.
Search for one-way flight options from Knoxville to Portland. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Wed 9/210:54 am -
2 stops28h 58m
Deal found 8/3![Multiple Airlines logo]()
$164
This American Airlines deal was found by Cheapflights users on 7/31. 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 8/2911:40 am -
1 stop9h 20m
Deal found 7/31![American Airlines logo]()
$182
This Southwest deal was found by Cheapflights users on 7/31. 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 8/296:50 am -
2 stops10h 10m
Deal found 7/31![Southwest logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/106:29 pm -
2 stops49h 07m
Deal found 8/3![Multiple Airlines logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:00 am -
1 stop7h 43m
Deal found 8/1![Multiple Airlines logo]()
$207
This Booking.com deal was found by Cheapflights users on 8/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/108:19 pm -
1 stop23h 12m
Deal found 8/3![Frontier logo]()
$208
This United Airlines deal was found by Cheapflights users on 8/3. 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 stop9h 04m
Deal found 8/3![United Airlines logo]()
$212
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 8/2![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Sat 8/296:56 pm -
3 stops49h 15m
Deal found 7/31![Multiple Airlines logo]()
$218
This United Airlines deal was found by Cheapflights users on 8/3. 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 9/284:53 pm -
1 stop9h 00m
Deal found 8/3![United Airlines logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Sat 10/108:30 am -
2 stops35h 05m
Deal found 7/31![Multiple Airlines logo]()
$224
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 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $324 (Kiwi.com) |
One-way from | $164 (Kiwi.com) |
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 4, 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 - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 8/22
9:00 am-3:01 pm
1 stop9h 01m
Portland
Wed 8/26
10:35 am-8:53 pm
1 stop7h 18m
$363
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 10/10
6:00 am-11:33 am
1 stop8h 33m
Portland
Sat 10/17
8:25 am-8:19 pm
1 stop8h 54m
$363
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 10/31
6:40 am-6:05 pm
2 stops14h 25m
Portland
Thu 11/5
5:00 am-6:45 pm
2 stops10h 45m
$420
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Thu 11/12
5:05 pm-11:09 pm
1 stop9h 04m
Portland
Sun 11/15
1:15 pm-10:29 pm
1 stop6h 14m
$425
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Wed 10/21
4:20 pm-10:10 pm
1 stop8h 50m
Portland
Mon 10/26
11:35 pm-12:20 pm
2 stops9h 45m
$428
Quickest round-trip
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 9/15
9:00 am-1:14 pm
1 stop7h 14m
Portland
Wed 9/30
10:43 am-8:49 pm
1 stop7h 06m
$432
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 9/15
5:30 pm-11:15 pm
2 stops8h 45m
Portland
Mon 9/21
11:30 pm-12:05 pm
2 stops9h 35m
$433
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Tue 9/1
1:55 pm-10:15 pm
2 stops11h 20m
Portland
Tue 9/8
11:30 pm-12:05 pm
2 stops9h 35m
$433
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Wed 9/9
12:09 pm-7:36 pm
2 stops10h 27m
Portland
Thu 9/17
7:25 am-8:01 pm
1 stop9h 36m
$474
KnoxvillePortland
TYS - PDX
TYSPDX
Knoxville McGhee Tyson
Sat 8/29
9:45 am-5:50 pm
2 stops11h 05m
Portland
Tue 9/1
5:00 am-3:54 pm
1 stop7h 54m
$478
Showing 1-10 of 20 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 41 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 August.The cheapest round-trip price found within the last 5 days was $324 on Multiple Airlines (Aug 23-Aug 24).
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 4, 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.
Overall
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
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
Vancouver
Kelso
Clackamas
Troutdale
Cannon Beach
McMinnville
The Dalles
Wilsonville
Stevenson
Tillamook
Astoria
Gresham
Silverton
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Alternative routes for Knoxville to Portland
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Complete your trip
Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.
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 4, 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 4, 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 4, 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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$284 | Average$505 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$536 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$354 | Average$594 | FlexibilityNo cancel fee | On-timeN/A |