$281+ Cheap flights from Idaho Falls to Knoxville (IDA - TYS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — TYS
Jul 2 — Jul 91
Round-trip
1 adult, Economy
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Find cheap flights from Idaho Falls to Knoxville with Cheapflights
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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 June 2, 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 June 2, 2026.
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:08 pm
IDA
- TYS
1 stop7h 14m
American Airlines
Sun 9/206:00 am
TYS
- IDA
1 stop7h 45m
American Airlines
Deal found 6/1![American Airlines logo]()
$653
This United Airlines deal was found by Cheapflights users on 5/28. 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 6/122:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 6/168:48 am
TYS
- IDA
1 stop6h 37m
United Airlines
Deal found 5/28![United Airlines logo]()
$658
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:00 am
IDA
- TYS
2 stops14h 59m
American Airlines
Tue 7/145:37 am
TYS
- IDA
1 stop8h 46m
American Airlines
Deal found 6/1![American Airlines logo]()
$703
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Tue 7/72:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 7/148:48 am
TYS
- IDA
1 stop6h 37m
United Airlines
Deal found 6/2![United Airlines logo]()
$718
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/241:53 pm
IDA
- TYS
1 stop7h 58m
American Airlines
Tue 1/512:18 pm
TYS
- IDA
2 stops12h 03m
American Airlines
Deal found 6/1![American Airlines logo]()
$728
This Delta deal was found by Cheapflights users on 6/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:00 pm
IDA
- TYS
2 stops13h 14m
Delta
Tue 1/512:00 pm
TYS
- IDA
2 stops12h 19m
Delta
Deal found 6/1![Delta logo]()
$749
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 June 2, 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 June 2, 2026.
This American Airlines deal was found by Cheapflights users on 5/29. 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 9/177:00 am
IDA
- TYS
2 stops13h 20m
American Airlines
Sun 9/208:15 pm
TYS
- IDA
1 stop19h 13m
American Airlines
Deal found 5/29![American Airlines logo]()
$703
This Delta deal was found by Cheapflights users on 5/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:00 pm
IDA
- TYS
2 stops13h 14m
Delta
Tue 1/512:00 pm
TYS
- IDA
2 stops12h 19m
Delta
Deal found 5/30![Delta logo]()
$703
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Tue 7/72:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 7/148:48 am
TYS
- IDA
1 stop6h 37m
United Airlines
Deal found 6/2![United Airlines logo]()
$718
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:00 am
IDA
- TYS
2 stops14h 59m
American Airlines
Tue 7/145:37 am
TYS
- IDA
1 stop8h 46m
American Airlines
Deal found 6/1![American Airlines logo]()
$703
This United Airlines deal was found by Cheapflights users on 5/28. 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 6/122:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 6/166:00 am
TYS
- IDA
2 stops13h 19m
United Airlines
Deal found 5/28![United Airlines logo]()
$784
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/241:53 pm
IDA
- TYS
1 stop7h 58m
American Airlines
Tue 1/512:18 pm
TYS
- IDA
2 stops12h 03m
American Airlines
Deal found 6/1![American Airlines logo]()
$728
This United Airlines deal was found by Cheapflights users on 5/29. 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 7/245:54 pm
IDA
- TYS
2 stops24h 50m
United Airlines
Tue 1/52:00 pm
TYS
- IDA
2 stops21h 28m
United Airlines
Deal found 5/29![United Airlines logo]()
$784
Last-minute flights from Idaho Falls to KnoxvilleDiscover last-minute flight deals from Idaho Falls to Knoxville. Data last updated June 2, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated June 2, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/28. 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 6/122:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 6/168:48 am
TYS
- IDA
1 stop6h 37m
United Airlines
Deal found 5/28![United Airlines logo]()
$658
This American Airlines deal was found by Cheapflights users on 5/30. 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.
Thu 7/27:00 am
IDA
- TYS
1 stop7h 41m
American Airlines
Mon 7/65:37 am
TYS
- IDA
1 stop8h 46m
American Airlines
Deal found 5/30![American Airlines logo]()
$765
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:00 am
IDA
- TYS
2 stops14h 59m
American Airlines
Tue 7/145:37 am
TYS
- IDA
1 stop8h 46m
American Airlines
Deal found 6/1![American Airlines logo]()
$703
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Tue 7/72:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Tue 7/148:48 am
TYS
- IDA
1 stop6h 37m
United Airlines
Deal found 6/2![United Airlines logo]()
$718
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/241:53 pm
IDA
- TYS
1 stop7h 58m
American Airlines
Tue 1/512:18 pm
TYS
- IDA
2 stops12h 03m
American Airlines
Deal found 6/1![American Airlines logo]()
$728
This Delta deal was found by Cheapflights users on 6/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:00 pm
IDA
- TYS
2 stops13h 14m
Delta
Tue 1/512:00 pm
TYS
- IDA
2 stops12h 19m
Delta
Deal found 6/1![Delta logo]()
$749
This United Airlines deal was found by Cheapflights users on 5/28. 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 7/245:54 pm
IDA
- TYS
2 stops24h 50m
United Airlines
Tue 1/52:00 pm
TYS
- IDA
2 stops21h 28m
United Airlines
Deal found 5/28![United Airlines logo]()
$784
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 June 2, 2026.
Search for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated June 2, 2026.
This Delta deal was found by Cheapflights users on 6/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:00 pm
IDA
- TYS
2 stops13h 11m
Delta
Deal found 6/1![Delta logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Fri 7/34:50 pm
IDA
- TYS
3 stops15h 07m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/32:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Deal found 6/1![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 5/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:00 pm
IDA
- TYS
2 stops13h 14m
Delta
Deal found 5/30![Delta logo]()
$413
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/187:00 am
IDA
- TYS
1 stop6h 53m
United Airlines
Deal found 6/1![United Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/242:30 pm
IDA
- TYS
1 stop5h 49m
United Airlines
Deal found 6/1![United Airlines logo]()
$458
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Thu 6/189:45 am
IDA
- TYS
3 stops59h 10m
Allegiant Air
Deal found 6/1![Allegiant Air logo]()
$463
This Alaska Airlines deal was found by Cheapflights users on 5/28. 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.
Fri 7/247:15 am
IDA
- TYS
2 stops12h 43m
Alaska Airlines
Deal found 5/28![Alaska Airlines logo]()
$500
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/187:00 am
IDA
- TYS
2 stops11h 10m
American Airlines
Deal found 6/1![American Airlines logo]()
$651
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 June 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $653 (American Airlines) |
One-way from | $281 (Delta) |
Popular in | February |
Cheapest in | November |
Average price | $652 |
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 2,558,603 searches. Data last updated June 2, 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 - TYS
IDATYS
Idaho Falls Fanning Field
Thu 9/17
7:00 am-10:20 pm
2 stops13h 20m
Knoxville McGhee Tyson
Sun 9/20
8:15 pm-1:28 pm
1 stop19h 13m
$703
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 7/24
7:00 pm-10:14 am
2 stops13h 14m
Knoxville McGhee Tyson
Tue 1/5
12:00 pm-10:19 pm
2 stops12h 19m
$703
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Tue 7/7
7:00 am-11:59 pm
2 stops14h 59m
Knoxville McGhee Tyson
Tue 7/14
5:37 am-12:23 pm
1 stop8h 46m
$703
Quickest round-trip
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Tue 7/7
2:30 pm-10:19 pm
1 stop5h 49m
Knoxville McGhee Tyson
Tue 7/14
8:48 am-1:25 pm
1 stop6h 37m
$718
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 7/24
1:53 pm-11:51 pm
1 stop7h 58m
Knoxville McGhee Tyson
Tue 1/5
12:18 pm-10:21 pm
2 stops12h 03m
$728
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 6/12
2:30 pm-10:19 pm
1 stop5h 49m
Knoxville McGhee Tyson
Tue 6/16
6:00 am-5:19 pm
2 stops13h 19m
$784
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 7/24
5:54 pm-8:44 pm
2 stops24h 50m
Knoxville McGhee Tyson
Tue 1/5
2:00 pm-9:28 am
2 stops21h 28m
$784
Cheapest one-way
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 7/3
7:00 pm-10:11 am
2 stops13h 11m
$281
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Fri 7/24
7:00 pm-10:14 am
2 stops13h 14m
$413
Idaho FallsKnoxville
IDA - TYS
IDATYS
Idaho Falls Fanning Field
Thu 6/18
7:00 am-3:53 pm
1 stop6h 53m
$454
Showing 1-10 of 12 resultsSorted 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 June 2, 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.
Food
6.6
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Food
6.6
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Food
6.6
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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
Alcoa
Oak Ridge
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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 June 2, 2026.
Idaho Falls and Knoxville flights
Browse other Idaho Falls and Knoxville flight options. Last updated on June 2, 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 June 2, 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 2,558,603 searches. Data last updated June 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$288 | Average$680 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$376 | Average$610 | FlexibilityNo cancel fee | On-time69% |