$408+ Cheap flights from Idaho Falls to Knoxville (IDA - TYS)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — TYS
Nov 26 — Dec 31
Round-trip
1 adult, Economy
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Find cheap flights from Idaho Falls to Knoxville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Idaho Falls to Knoxville
Cheapest
Best
Last-minute
One-way
Cheapest flights from Idaho Falls to KnoxvilleExplore the most affordable flight options available from Idaho Falls to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2026.
Explore the most affordable flight options available from Idaho Falls to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2026.
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:00 am -
1 stop6h 42m
Fri 11/202:54 pm -
1 stop8h 57m
Deal found 10/26![American Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:35 pm -
1 stop5h 57m
Sat 11/219:00 am -
1 stop8h 38m
Deal found 10/26![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:05 pm -
2 stops8h 54m
Sat 11/218:04 am -
2 stops12h 13m
Deal found 10/26![Delta logo]()
$759
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:35 pm -
1 stop5h 57m
Fri 11/135:05 pm -
1 stop6h 04m
Deal found 10/25![United Airlines logo]()
$897
This American Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:00 am -
1 stop9h 00m
Fri 11/139:33 am -
2 stops15h 26m
Deal found 10/25![American Airlines logo]()
$902
This American Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/236:00 am -
1 stop15h 41m
Sun 12/275:30 am -
1 stop18h 26m
Deal found 10/24![American Airlines logo]()
$991
Best flights from Idaho Falls to KnoxvilleDiscover carefully curated flight deals from Idaho Falls to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.
Discover carefully curated flight deals from Idaho Falls to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:00 am -
1 stop6h 42m
Fri 11/202:54 pm -
1 stop8h 57m
Deal found 10/26![American Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/307:00 am -
1 stop5h 56m
Wed 2/34:28 pm -
1 stop6h 42m
Deal found 10/23![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:35 pm -
1 stop5h 57m
Sat 11/219:00 am -
1 stop8h 38m
Deal found 10/26![United Airlines logo]()
$520
Last-minute flights from Idaho Falls to KnoxvilleDiscover last-minute flight deals from Idaho Falls to Knoxville. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated October 27, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:00 am -
1 stop6h 42m
Fri 11/202:54 pm -
1 stop8h 57m
Deal found 10/26![American Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:35 pm -
1 stop5h 57m
Sat 11/219:00 am -
1 stop8h 38m
Deal found 10/26![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:05 pm -
2 stops8h 54m
Sat 11/218:04 am -
2 stops12h 13m
Deal found 10/26![Delta logo]()
$759
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:35 pm -
1 stop5h 57m
Fri 11/135:05 pm -
1 stop6h 04m
Deal found 10/25![United Airlines logo]()
$897
This American Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:00 am -
1 stop9h 00m
Fri 11/139:33 am -
2 stops15h 26m
Deal found 10/25![American Airlines logo]()
$902
One-way flights from Idaho Falls to KnoxvilleSearch for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
Search for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/67:18 pm -
3 stops38h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Allegiant Air logo]()
$408
This Alaska Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/66:15 am -
2 stops15h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Alaska Airlines logo]()
$428
Find flight deals from Idaho Falls to Knoxville
Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) 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 October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $459 (American Airlines) |
One-way from | $408 (Kiwi.com) |
Popular in | February |
Cheapest in | October |
Average price | $236 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho Falls 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 7,457,451 searches. Data last updated October 27, 2026.
Use the filters below to find and compare flights from Idaho Falls to Knoxville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 3/6
7:18 pm-11:24 am
3 stops38h 06m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$408
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 3/6
6:15 am-11:53 pm
2 stops15h 38m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$428
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sun 11/8
8:00 am-4:42 pm
1 stop6h 42m
Knoxville McGhee Tyson
Fri 11/20
2:54 pm-9:51 pm
1 stop8h 57m
$459
Quickest round-trip
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 1/30
7:00 am-2:56 pm
1 stop5h 56m
Knoxville McGhee Tyson
Wed 2/3
4:28 pm-9:10 pm
1 stop6h 42m
$499
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sun 11/8
2:35 pm-10:32 pm
1 stop5h 57m
Knoxville McGhee Tyson
Sat 11/21
9:00 am-3:38 pm
1 stop8h 38m
$520
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Idaho Falls-Knoxville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Knoxville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Knoxville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Idaho Falls-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 Idaho Falls-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 Idaho Falls to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville from Idaho Falls with our price prediction graph.
IDA-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.
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 October 27, 2026.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Idaho Falls to Knoxville to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Related info for your journey
Find useful and relevant information for your journey from Idaho Falls 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
Morristown
Newport
Bryson City
Crossville
Murphy
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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 October 27, 2026.
Idaho Falls and Knoxville flights
Browse other Idaho Falls and Knoxville flight options. Last updated on October 27, 2026.
Other flights from Idaho Falls
Browse through other flights departing from Idaho Falls. Flights are based on user searches made on Cheapflights and were last updated on October 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Idaho Falls to Knoxville
Discover the top 2 airlines that operate flights from Idaho Falls 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 7,457,451 searches. Data last updated October 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$376 | Average$652 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$474 | Average$690 | FlexibilityNo cancel fee | On-time71% |