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Knoxville

$384+ Cheap flights from Idaho Falls to Knoxville (IDA - TYS)

IDA — TYS
Nov 7 — Nov 141
Sat 11/7
Sat 11/14
1 adult, Economy
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Cheap flight deals from Idaho Falls to Knoxville

Cheapest flights from Idaho Falls to Knoxville

Tue 11/32:35 pm -
1 stop5h 57m
Wed 11/116:45 am -
2 stops10h 53m
Deal found 10/5$384
Wed 11/42:35 pm -
1 stop5h 57m
Wed 11/119:00 am -
1 stop6h 28m
Deal found 10/7$470
Thu 11/121:35 pm -
1 stop7h 57m
Sun 11/156:50 am -
1 stop8h 15m
Deal found 10/5$517
Wed 11/41:35 pm -
1 stop7h 57m
Wed 11/112:55 pm -
1 stop8h 48m
Deal found 10/7$554
Wed 10/286:56 pm -
2 stops12h 38m
Mon 11/25:40 am -
2 stops8h 42m
Deal found 10/6$626
Wed 10/282:35 pm -
1 stop5h 57m
Mon 11/27:35 pm -
2 stops19h 53m
Deal found 10/6$703

Find flight deals from Idaho Falls to Knoxville

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$379
(American Airlines)

Popular in

February

Cheapest in

October

Average price

$236
Provider with most accurate pricing for Idaho Falls Fanning Field-Knoxville McGhee Tyson flight deals.
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Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Knoxville McGhee Tyson flights.
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From Idaho Falls Fanning Field to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 32% potential increase in price ($353 potential increase over avg. RT price).
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Cheapest flight prices on average. 14% potential price decrease ($93 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Idaho Falls to Knoxville that are best for you.

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Route

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Price

Cheapest round-trip

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Tue 11/3

2:35 pm-10:32 pm

1 stop5h 57m

Knoxville McGhee Tyson

Wed 11/11

6:45 am-3:38 pm

2 stops10h 53m

$384

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Tue 3/9

1:42 pm-11:53 pm

1 stop8h 11m

Knoxville McGhee Tyson

Tue 3/16

2:52 pm-10:24 pm

2 stops9h 32m

$384

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Tue 3/9

6:00 am-6:19 pm

2 stops10h 19m

Knoxville McGhee Tyson

Tue 3/16

7:55 am-6:14 pm

2 stops12h 19m

$389

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Wed 3/31

1:42 pm-11:53 pm

1 stop8h 11m

Knoxville McGhee Tyson

Tue 4/6

5:44 am-1:13 pm

1 stop9h 29m

$414

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Wed 3/31

6:45 pm-9:12 am

2 stops12h 27m

Knoxville McGhee Tyson

Tue 4/6

7:55 am-6:14 pm

2 stops12h 19m

$450
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

Wed 11/4

7:00 am-3:01 pm

1 stop6h 01m

Knoxville McGhee Tyson

Wed 11/11

6:45 am-1:28 pm

2 stops8h 43m

$499

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/5

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.
Estimated round-trip price

Reviews of airlines servicing Knoxville

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
10,315 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
United Airlines
7.4
Good
10,315 reviews
United Airlines
7.4
Good
10,315 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
American Airlines
7.0
Good
12,138 reviews
United Airlines
7.4
Good
10,315 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

Related info for your journey

  • 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 57m. Fly via United Airlines, American Airlines, or Delta to get the fastest option. Idaho Falls and Knoxville are separated by a distance of 1575 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Idaho Falls to Knoxville is United Airlines. Our recent data shows that you can find tickets from as low as $376 on this airline. An additional option worth looking into is American Airlines, starting at $510. United Airlines is currently priced 48% 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
Morristown
Bryson City
Murphy

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Idaho Falls to Knoxville

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$376Average$652FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$510Average$737FlexibilityNo cancel feeOn-time71%

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