$388+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — TYS
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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
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Best
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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 September 20, 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 September 20, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:35 pm -
1 stop5h 57m
Tue 11/36:45 am -
2 stops10h 53m
Deal found 9/17![United Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:37 am -
2 stops14h 22m
Tue 11/312:20 pm -
2 stops12h 39m
Deal found 9/17![American Airlines logo]()
$529
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/261:39 pm -
1 stop7h 49m
Fri 10/305:07 pm -
1 stop22h 12m
Deal found 9/16![American Airlines logo]()
$558
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:35 pm -
1 stop5h 57m
Thu 10/299:00 am -
1 stop8h 38m
Deal found 9/16![United Airlines logo]()
$777
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 am -
2 stops14h 07m
Mon 10/53:00 pm -
1 stop8h 42m
Deal found 9/16![American Airlines logo]()
$840
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:28 pm -
1 stop5h 46m
Mon 10/54:53 pm -
1 stop6h 01m
Deal found 9/16![United Airlines logo]()
$900
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/235:50 pm -
2 stops13h 01m
Mon 12/282:55 pm -
1 stop8h 51m
Deal found 9/16![American Airlines logo]()
$923
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:56 pm -
2 stops12h 38m
Thu 10/2910:29 am -
2 stops13h 41m
Deal found 9/16![Delta logo]()
$942
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 September 20, 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 September 20, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 36m
Wed 2/34:25 pm -
1 stop6h 43m
Deal found 9/16![United Airlines logo]()
$479
This American Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:37 am -
2 stops14h 22m
Tue 11/312:20 pm -
2 stops12h 39m
Deal found 9/17![American Airlines logo]()
$529
Last-minute flights from Idaho Falls to KnoxvilleDiscover last-minute flight deals from Idaho Falls to Knoxville. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated September 20, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 am -
2 stops14h 07m
Mon 10/53:00 pm -
1 stop8h 42m
Deal found 9/16![American Airlines logo]()
$840
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:28 pm -
1 stop5h 46m
Mon 10/54:53 pm -
1 stop6h 01m
Deal found 9/16![United Airlines logo]()
$900
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:35 pm -
1 stop5h 57m
Thu 10/299:00 am -
1 stop8h 38m
Deal found 9/16![United Airlines logo]()
$777
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:56 pm -
2 stops12h 38m
Thu 10/2910:29 am -
2 stops13h 41m
Deal found 9/16![Delta logo]()
$942
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/261:39 pm -
1 stop7h 49m
Fri 10/305:07 pm -
1 stop22h 12m
Deal found 9/16![American Airlines logo]()
$558
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:35 pm -
1 stop5h 57m
Tue 11/36:45 am -
2 stops10h 53m
Deal found 9/17![United Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:37 am -
2 stops14h 22m
Tue 11/312:20 pm -
2 stops12h 39m
Deal found 9/17![American Airlines logo]()
$529
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 September 20, 2026.
Search for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/172:28 pm -
1 stop5h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
2 stops7h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:57 pm -
3 stops40h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$624
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 September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $464 (United Airlines) |
One-way from | $388 (United Airlines) |
Popular in | February |
Cheapest in | October |
Average price | $776 |
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 September 20, 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
Quickest round-trip
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 10/17
2:28 pm-10:14 pm
1 stop5h 46m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$388
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 10/17
6:00 am-3:26 pm
2 stops7h 26m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$445
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Sat 1/30
7:00 am-2:36 pm
1 stop5h 36m
Knoxville McGhee Tyson
Wed 2/3
4:25 pm-9:08 pm
1 stop6h 43m
$479
Idaho FallsKnoxville
IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson
IDATYS
Idaho Falls Fanning Field
Thu 10/29
6:37 am-10:59 pm
2 stops14h 22m
Knoxville McGhee Tyson
Tue 11/3
12:20 pm-10:59 pm
2 stops12h 39m
$529
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 September 20, 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
Food
6.7
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Food
6.7
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Food
6.7
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
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
Crossville
Morristown
Bryson City
Murphy
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Other flights to Knoxville
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Idaho Falls and Knoxville flights
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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 September 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$373 | Average$776 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$510 | Average$737 | FlexibilityNo cancel fee | On-time71% |