How long is the flight from Idaho Falls to Knoxville?

There are many flights that can get you from Idaho Falls to Knoxville in 6h 04m. 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 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 $393. United Airlines is currently priced 47% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Knoxville ranges from 2.7 - 4.8 inches per month. March is typically the wettest month, when rainfall can reach 4.8 in. October is typically the driest time to visit Knoxville when rainfall is around 2.7 in.

If weather is an important factor for your trip to Knoxville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What is the cheapest time of day to fly from IDA to TYS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho Falls to Knoxville as you normally would.

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.

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.

$238+ Cheap Flights from Idaho Falls to Knoxville

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Cheap flight deals from Idaho Falls to Knoxville

Cheapest

Best

Last-minute

One-way

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 August 21, 2026.

Fri 9/42:25 pm -

1 stop6h 04m

Thu 11/199:00 am -

1 stop8h 38m

Deal found 8/18

$439

Fri 8/212:25 pm -

1 stop6h 04m

Thu 9/104:50 pm -

1 stop6h 28m

Deal found 8/19

$490

Sat 11/72:35 pm -

1 stop5h 54m

Tue 11/105:05 pm -

1 stop6h 04m

Deal found 8/17

$494

Fri 8/2112:06 pm -

1 stop7h 47m

Mon 9/142:43 pm -

1 stop8h 37m

Deal found 8/19

$509

Fri 8/212:25 pm -

1 stop6h 04m

Wed 9/164:50 pm -

1 stop6h 28m

Deal found 8/19

$541

Wed 8/192:25 pm -

1 stop6h 04m

Tue 9/154:50 pm -

1 stop6h 28m

Deal found 8/19

$554

Mon 8/245:33 pm -

2 stops43h 26m

Sun 9/132:34 pm -

1 stop29h 59m

Deal found 8/19

$557

Sat 8/2210:35 am -

2 stops11h 24m

Fri 9/114:50 pm -

1 stop6h 28m

Deal found 8/19

$559

Last-minute flights from Idaho Falls to Knoxville
Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated August 21, 2026 and is based on user searches.

Thu 8/202:25 pm -

1 stop6h 04m

Sat 9/124:50 pm -

1 stop6h 28m

Deal found 8/19

$574

Fri 8/212:25 pm -

1 stop6h 04m

Thu 9/104:50 pm -

1 stop6h 28m

Deal found 8/19

$490

Fri 8/2112:06 pm -

1 stop7h 47m

Mon 9/142:43 pm -

1 stop8h 37m

Deal found 8/19

$509

Fri 8/212:25 pm -

1 stop6h 04m

Wed 9/164:50 pm -

1 stop6h 28m

Deal found 8/19

$541

Sat 8/222:25 pm -

1 stop6h 04m

Sat 9/124:50 pm -

1 stop6h 28m

Deal found 8/19

$554

Sat 8/2210:35 am -

2 stops11h 24m

Fri 9/114:50 pm -

1 stop6h 28m

Deal found 8/19

$559

Mon 8/245:33 pm -

2 stops43h 26m

Sun 9/132:34 pm -

1 stop29h 59m

Deal found 8/19

$557

Fri 9/42:25 pm -

1 stop6h 04m

Thu 11/199:00 am -

1 stop8h 38m

Deal found 8/18

$439

Find flight deals from Idaho Falls to Knoxville

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$439 (United Airlines)
One-way from	$228 (Kiwi.com)
Popular in	February
Cheapest in	November
Average price	$546

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.

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. 34% potential increase in price ($377 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 13% potential price decrease ($86 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

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 Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sat 1/30

2:35 pm-10:20 pm

1 stop5h 45m

Knoxville McGhee Tyson

Wed 2/3

8:45 am-1:35 pm

1 stop6h 50m

$459

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Fri 9/4

2:25 pm-10:29 pm

1 stop6h 04m

Knoxville McGhee Tyson

Thu 11/19

7:00 am-3:38 pm

2 stops10h 38m

$466

Quickest round-trip

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sat 11/7

2:35 pm-10:29 pm

1 stop5h 54m

Knoxville McGhee Tyson

Tue 11/10

5:05 pm-9:09 pm

1 stop6h 04m

$494

Cheapest one-way

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Fri 10/16

10:49 pm-5:21 pm

3 stops40h 32m

$288

Quickest one-way

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Fri 10/16

2:28 pm-10:14 pm

1 stop5h 46m

$379

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Fri 10/16

1:50 pm-11:59 pm

1 stop8h 09m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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

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

10,105 reviews

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

United Airlines

7.4

Good

10,105 reviews

United Airlines

7.4

Good

10,105 reviews

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

American Airlines

7.1

Good

11,979 reviews

United Airlines

7.4

Good

10,105 reviews

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

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 6h 04m. 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 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 $393. United 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

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Top 2 airlines flying from Idaho Falls to Knoxville

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$376	Average$548	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$393	Average$690	FlexibilityNo cancel fee	On-time71%

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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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho Falls to Knoxville with Cheapflights

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Cheap flight deals from Idaho Falls to Knoxville

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 August 21, 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 August 21, 2026.

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 August 21, 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 August 21, 2026.

Last-minute flights from Idaho Falls to KnoxvilleDiscover last-minute flight deals from Idaho Falls to Knoxville. Data last updated August 21, 2026 and is based on user searches.

Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated August 21, 2026 and is based on user searches.

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 August 21, 2026.

Search for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.

Find flight deals from Idaho Falls to Knoxville

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Round-trip from

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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.

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.

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.

Related info for your journey

How long is the flight from Idaho Falls to Knoxville?

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

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

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

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

Traveling to a place near Knoxville?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho Falls to Knoxville

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Knoxville by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Idaho Falls to Knoxville by cabin class

Find flights from Idaho Falls to Knoxville, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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 August 21, 2026.

Idaho Falls and Knoxville flights

Browse other Idaho Falls and Knoxville flight options. Last updated on August 21, 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 August 21, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Top 2 airlines flying from Idaho Falls to Knoxville

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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 August 21, 2026.

Best flights from Idaho Falls to Knoxville
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 August 21, 2026.

Last-minute flights from Idaho Falls to Knoxville
Discover last-minute flight deals from Idaho Falls to Knoxville. Data last updated August 21, 2026 and is based on user searches.

One-way flights from Idaho Falls to Knoxville
Search for one-way flight options from Idaho Falls to Knoxville. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.