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$238+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — TYS
May 19 — May 261
Tue 5/19
Tue 5/26
1 adult, Economy
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Cheap flight deals from Idaho Falls to Knoxville

Cheapest flights from Idaho Falls to Knoxville
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 April 19, 2026.

This Delta deal was found by Cheapflights users on 4/15. 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.
Mon 5/116:54 pm
IDA
-
TYS
2 stops12h 40m
Delta
Sat 5/166:36 am
TYS
-
IDA
2 stops13h 38m
Delta
Deal found 4/15$518
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 9/202:20 pm
IDA
-
TYS
1 stop6h 58m
American Airlines
Sat 9/268:06 am
TYS
-
IDA
1 stop6h 06m
American Airlines
Deal found 4/17$547
This American Airlines deal was found by Cheapflights users on 4/14. 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 6/12:08 pm
IDA
-
TYS
1 stop7h 48m
American Airlines
Thu 6/45:33 pm
TYS
-
IDA
1 stop6h 42m
American Airlines
Deal found 4/14$565
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 6/122:14 pm
IDA
-
TYS
1 stop7h 42m
American Airlines
Tue 6/235:33 pm
TYS
-
IDA
1 stop6h 42m
American Airlines
Deal found 4/17$567
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:48 am
IDA
-
TYS
2 stops12h 37m
American Airlines
Sat 5/1611:40 am
TYS
-
IDA
2 stops13h 59m
American Airlines
Deal found 4/15$574
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/92:31 pm
IDA
-
TYS
1 stop5h 52m
United Airlines
Tue 5/127:18 pm
TYS
-
IDA
2 stops16h 37m
United Airlines
Deal found 4/15$580
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Mon 4/271:43 pm
IDA
-
TYS
1 stop8h 13m
American Airlines
Tue 4/281:20 pm
TYS
-
IDA
2 stops12h 19m
American Airlines
Deal found 4/17$595
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/92:31 pm
IDA
-
TYS
1 stop5h 52m
United Airlines
Sat 5/169:12 am
TYS
-
IDA
1 stop8h 31m
United Airlines
Deal found 4/15$618
This United Airlines deal was found by Cheapflights users on 4/14. 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 6/52:30 pm
IDA
-
TYS
1 stop5h 49m
United Airlines
Fri 6/124:56 pm
TYS
-
IDA
1 stop22h 29m
United Airlines
Deal found 4/14$622

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 April 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$518
(Delta)

One-way from

$238
(Kiwi.com)

Popular in

February

Cheapest in

November

Average price

$609
Provider with most accurate pricing for Idaho Falls Fanning Field-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Knoxville McGhee Tyson flights.
Search Deals
From Idaho Falls Fanning Field to Knoxville McGhee Tyson
Search Deals
One-way flight from Idaho Falls Fanning Field to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 39% potential increase in price ($404 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease ($95 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 19, 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

Price

Cheapest round-trip

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sat 5/9

2:31 pm-10:23 pm

1 stop5h 52m

Knoxville McGhee Tyson

Tue 5/12

7:18 pm-9:55 am

2 stops16h 37m

$580

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 6/5

2:30 pm-10:19 pm

1 stop5h 49m

Knoxville McGhee Tyson

Fri 6/12

4:56 pm-1:25 pm

1 stop22h 29m

$622

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sat 5/9

2:31 pm-10:23 pm

1 stop5h 52m

Knoxville McGhee Tyson

Fri 5/15

4:20 pm-9:55 am

1 stop19h 35m

$642

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 8/28

2:30 pm-10:38 pm

1 stop6h 08m

Knoxville McGhee Tyson

Mon 8/31

5:45 am-3:29 pm

2 stops11h 44m

$657
Quickest round-trip

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sun 5/10

2:31 pm-10:23 pm

1 stop5h 52m

Knoxville McGhee Tyson

Tue 5/12

4:20 pm-9:03 pm

1 stop6h 43m

$667

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sat 6/6

10:35 am-12:30 am

2 stops11h 55m

Knoxville McGhee Tyson

Sat 6/13

6:30 am-11:45 am

1 stop7h 15m

$698

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Thu 6/18

11:28 am-11:01 pm

2 stops9h 33m

Knoxville McGhee Tyson

Fri 6/26

5:40 am-10:31 pm

2 stops18h 51m

$722

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Tue 5/12

2:31 pm-10:23 pm

1 stop5h 52m

Knoxville McGhee Tyson

Sat 5/16

9:12 am-3:43 pm

1 stop8h 31m

$767

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 6/8

2:14 pm-11:56 pm

1 stop7h 42m

Knoxville McGhee Tyson

Mon 6/15

5:36 am-12:14 pm

1 stop8h 38m

$772

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 7/24

7:15 am-9:59 pm

2 stops12h 44m

Knoxville McGhee Tyson

Tue 1/5

12:18 pm-10:39 pm

2 stops12h 21m

$785

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 16 resultsSorted by cheapest first
1
2
  • 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.
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 Idaho Falls to Knoxville

How much does it cost to fly round-trip from Idaho Falls to Knoxville?

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 April 19, 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.
United Airlines
7.4
Good
9,604 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,604 reviews
United Airlines
7.4
Good
9,604 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,621 reviews
United Airlines
7.4
Good
9,604 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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.

  • How long is the flight from Idaho Falls to Knoxville?

    There are many flights that can get you from Idaho Falls to Knoxville in 5h 52m. Fly via United Airlines to get the fastest option. Idaho Falls and Knoxville are separated by a distance of 1575 mi.

  • What are the cheapest airlines flying from Idaho Falls to Knoxville round-trip?

    Our cheapest airline available from Idaho Falls to Knoxville is American Airlines. Our recent data shows that you can find tickets from as low as $329 on this airline. An additional option worth looking into is United Airlines, starting at $373. American Airlines is currently priced 47% below the average price you’ll pay for this route.

  • Can I find deals for flights from Idaho Falls to Knoxville that include hotel bookings?

    Yes. In addition to deals on Idaho Falls to Knoxville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho Falls to Knoxville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to Knoxville.

  • Can I find deals for business class flights from Idaho Falls to Knoxville?

    Yes. Cheapflights offers flight deals from Idaho Falls to Knoxville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Murphy
Oak Ridge

Browse thousands of different options on Cheapflights for your next trip

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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 2,558,603 searches. Data last updated April 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$329Average$600FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$373Average$583FlexibilityNo cancel feeOn-time69%

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