$402+ Cheap flights from Knoxville to Idaho Falls (TYS - IDA)
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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IDA
Sep 27 — Oct 41
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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Cheapest flights from Knoxville to Idaho FallsExplore the most affordable flight options available from Knoxville to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2026.
Explore the most affordable flight options available from Knoxville to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2026.
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Fri 10/169:00 am -
1 stop8h 24m
Sat 10/242:28 pm -
1 stop5h 45m
Deal found 8/23![United Airlines logo]()
$402
This Delta deal was found by Cheapflights users on 8/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:06 pm -
2 stops12h 04m
Sun 10/186:56 pm -
2 stops12h 38m
Deal found 8/23![Delta logo]()
$439
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Sat 11/79:00 am -
1 stop8h 38m
Wed 11/112:35 pm -
1 stop5h 57m
Deal found 8/26![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 8/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:06 pm -
2 stops12h 04m
Tue 10/206:56 pm -
2 stops12h 38m
Deal found 8/23![Delta logo]()
$479
This American Airlines deal was found by Cheapflights users on 8/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop9h 09m
Wed 10/211:39 pm -
1 stop6h 06m
Deal found 8/23![American Airlines logo]()
$481
This American Airlines deal was found by Cheapflights users on 8/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop9h 09m
Tue 10/201:39 pm -
1 stop7h 39m
Deal found 8/23![American Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 8/269:00 am -
1 stop8h 23m
Tue 9/17:00 am -
1 stop6h 54m
Deal found 8/25![United Airlines logo]()
$534
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 9/104:50 pm -
1 stop6h 28m
Mon 9/142:25 pm -
1 stop6h 19m
Deal found 8/26![United Airlines logo]()
$538
Best flights from Knoxville to Idaho FallsDiscover carefully curated flight deals from Knoxville to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
Discover carefully curated flight deals from Knoxville to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Fri 10/169:00 am -
1 stop8h 24m
Sat 10/2410:35 am -
2 stops11h 24m
Deal found 8/23![United Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 8/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:06 pm -
2 stops12h 04m
Tue 10/206:56 pm -
2 stops12h 38m
Deal found 8/23![Delta logo]()
$479
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Sat 11/79:00 am -
1 stop8h 38m
Wed 11/112:35 pm -
1 stop5h 57m
Deal found 8/26![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 8/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:29 am -
2 stops13h 41m
Wed 10/216:56 pm -
2 stops12h 38m
Deal found 8/23![Delta logo]()
$609
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 9/109:45 am -
2 stops9h 31m
Mon 9/142:25 pm -
1 stop6h 19m
Deal found 8/26![United Airlines logo]()
$615
This United Airlines deal was found by Cheapflights users on 8/27. 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 10/96:00 am -
2 stops29h 53m
Sat 10/175:51 pm -
2 stops14h 46m
Deal found 8/27![United Airlines logo]()
$733
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/116:00 am -
2 stops13h 16m
Tue 9/1510:35 am -
2 stops11h 48m
Deal found 8/27![United Airlines logo]()
$738
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Fri 10/29:00 am -
1 stop6h 24m
Sat 10/104:05 pm -
2 stops20h 37m
Deal found 8/25![United Airlines logo]()
$757
Last-minute flights from Knoxville to Idaho FallsDiscover last-minute flight deals from Knoxville to Idaho Falls. Data last updated August 28, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Idaho Falls. Data last updated August 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/27. 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 8/279:00 am -
1 stop6h 29m
Sun 9/67:00 am -
1 stop6h 54m
Deal found 8/27![United Airlines logo]()
$584
This American Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 8/276:03 am -
1 stop7h 27m
Sun 9/62:20 pm -
1 stop6h 58m
Deal found 8/26![American Airlines logo]()
$612
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Fri 8/284:50 pm -
1 stop6h 28m
Sun 9/67:00 am -
1 stop6h 54m
Deal found 8/26![United Airlines logo]()
$617
This United Airlines deal was found by Cheapflights users on 8/27. 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 8/294:50 pm -
1 stop6h 28m
Sun 9/67:00 am -
1 stop6h 54m
Deal found 8/27![United Airlines logo]()
$564
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Sat 8/295:45 am -
2 stops9h 44m
Sun 8/307:00 am -
1 stop6h 54m
Deal found 8/26![United Airlines logo]()
$574
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 9/104:50 pm -
1 stop6h 28m
Mon 9/142:25 pm -
1 stop6h 19m
Deal found 8/26![United Airlines logo]()
$538
One-way flights from Knoxville to Idaho FallsSearch for one-way flight options from Knoxville to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
Search for one-way flight options from Knoxville to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
This American Airlines deal was found by Cheapflights users on 8/27. 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 10/56:00 am -
1 stop9h 09m
Deal found 8/27![American Airlines logo]()
$413
This United Airlines deal was found by Cheapflights users on 8/27. 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 10/56:00 am -
2 stops11h 24m
Deal found 8/27![United Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 8/27. 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 10/59:54 pm -
3 stops43h 26m
Deal found 8/27![Multiple Airlines logo]()
$619
Find flight deals from Knoxville to Idaho Falls
Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Idaho Falls (IDA). 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $402 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Knoxville to Idaho Falls 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 August 28, 2026.
Use the filters below to find and compare flights from Knoxville to Idaho Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Fri 10/16
9:00 am-3:24 pm
1 stop8h 24m
Idaho Falls Fanning Field
Sat 10/24
10:35 am-11:59 pm
2 stops11h 24m
$443
Quickest round-trip
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Sat 11/7
9:00 am-3:38 pm
1 stop8h 38m
Idaho Falls Fanning Field
Wed 11/11
2:35 pm-10:32 pm
1 stop5h 57m
$459
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Wed 10/14
12:06 pm-10:10 pm
2 stops12h 04m
Idaho Falls Fanning Field
Tue 10/20
6:56 pm-9:34 am
2 stops12h 38m
$479
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Wed 10/14
10:29 am-10:10 pm
2 stops13h 41m
Idaho Falls Fanning Field
Wed 10/21
6:56 pm-9:34 am
2 stops12h 38m
$609
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Thu 9/10
9:45 am-5:16 pm
2 stops9h 31m
Idaho Falls Fanning Field
Mon 9/14
2:25 pm-10:44 pm
1 stop6h 19m
$615
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Fri 10/9
6:00 am-9:53 am
2 stops29h 53m
Idaho Falls Fanning Field
Sat 10/17
5:51 pm-10:37 am
2 stops14h 46m
$733
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Fri 9/11
6:00 am-5:16 pm
2 stops13h 16m
Idaho Falls Fanning Field
Tue 9/15
10:35 am-12:23 am
2 stops11h 48m
$738
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Fri 10/2
9:00 am-1:24 pm
1 stop6h 24m
Idaho Falls Fanning Field
Sat 10/10
4:05 pm-2:42 pm
2 stops20h 37m
$757
Cheapest one-way
Quickest one-way
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Mon 10/5
6:00 am-1:09 pm
1 stop9h 09m
$413
KnoxvilleIdaho Falls
TYS Knoxville McGhee Tyson - IDA Idaho Falls Fanning Field
TYSIDA
Knoxville McGhee Tyson
Mon 10/5
6:00 am-3:24 pm
2 stops11h 24m
$532
Showing 1-10 of 11 resultsSorted by cheapest first
Compare providers for flights from Knoxville to Idaho Falls
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 Idaho Falls 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-Idaho Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Idaho Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Idaho Falls flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-Idaho Falls 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-Idaho Falls 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 Idaho Falls
Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Knoxville with our price prediction graph.
TYS-IDA
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 Idaho Falls
Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated August 28, 2026.
Get a feel of what it's like to fly with United Airlines and American Airlines from Knoxville to Idaho Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Comfort
7.3
Entertainment
7.1
Food
6.7
Crew
8.1
Boarding
7.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Overall
7.4
Comfort
7.3
Entertainment
7.1
Food
6.7
Crew
8.1
Boarding
7.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Overall
7.4
Comfort
7.3
Entertainment
7.1
Food
6.7
Crew
8.1
Boarding
7.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from Knoxville to Idaho Falls. 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 Idaho Falls?
Book flights to Idaho Falls if you plan to visit one of these locationsRexburg
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Other flights to Idaho Falls
Explore flights to Idaho Falls departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 28, 2026.
Knoxville and Idaho Falls flights
Browse other Knoxville and Idaho Falls flight options. Last updated on August 28, 2026.
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Browse through other flights departing from Knoxville. Flights are based on user searches made on Cheapflights and were last updated on August 28, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Knoxville to Idaho Falls
Discover the top 2 airlines that operate flights from Knoxville to Idaho Falls. 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 August 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$416 | Average$615 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$559 | Average$730 | FlexibilityNo cancel fee | On-time71% |