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Knoxville

$449+ Cheap flights from Idaho Falls to Knoxville (IDA - TYS)

IDA — TYS
Nov 18 — Nov 251
Wed 11/18
Wed 11/25
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
Sat 11/79:00 am -
1 stop6h 28m
Deal found 10/19$449
Sun 11/82:35 pm -
1 stop5h 57m
Fri 11/209:00 am -
1 stop6h 28m
Deal found 10/16$453
Sun 11/81:35 pm -
1 stop7h 57m
Fri 11/202:54 pm -
2 stops9h 37m
Deal found 10/16$650
Sun 11/86:56 pm -
2 stops12h 59m
Fri 11/205:40 am -
2 stops8h 35m
Deal found 10/16$840
Tue 10/206:37 am -
2 stops14h 22m
Thu 10/227:25 am -
1 stop7h 44m
Deal found 10/15$904
Tue 10/202:28 pm -
1 stop5h 46m
Thu 10/229:00 am -
1 stop8h 24m
Deal found 10/16$919
Sat 11/211:43 pm -
1 stop7h 49m
Sat 11/285:30 am -
1 stop9h 43m
Deal found 10/14$1,026

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. 31% potential increase in price ($347 potential increase over avg. RT price).
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Cheapest flight prices on average. 14% potential price decrease ($92 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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest 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

Sat 11/7

9:00 am-1:28 pm

1 stop6h 28m

$449

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sun 11/8

2:35 pm-10:32 pm

1 stop5h 57m

Knoxville McGhee Tyson

Fri 11/20

9:00 am-1:28 pm

1 stop6h 28m

$453

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

Thu 2/25

6:00 am-5:13 pm

2 stops9h 13m

Knoxville McGhee Tyson

Wed 3/3

7:55 am-6:14 pm

2 stops12h 19m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

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
7.3
Good
10,388 reviews

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Food

6.7

Entertainment

7.1

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
7.3
Good
10,388 reviews
United Airlines
7.3
Good
10,388 reviews

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Food

6.7

Entertainment

7.1

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
12,177 reviews
United Airlines
7.3
Good
10,388 reviews

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Food

6.7

Entertainment

7.1

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 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 $474. United Airlines is currently priced 49% 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
Newport
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$474Average$690FlexibilityNo cancel feeOn-time71%

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