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Knoxville

$469+ Cheap flights from Idaho Falls to Knoxville (IDA - TYS)

IDA — TYS
Dec 10 — Dec 171
Thu 12/10
Thu 12/17
1 adult, Economy
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Cheap flight deals from Idaho Falls to Knoxville

Cheapest flights from Idaho Falls to Knoxville

Mon 12/71:41 pm -
1 stop7h 59m
Mon 12/145:30 am -
1 stop9h 41m
Deal found 11/9$469
Tue 11/246:44 am -
2 stops10h 08m
Thu 12/32:55 pm -
1 stop8h 54m
Deal found 11/9$527
Sat 12/126:35 am -
1 stop6h 06m
Tue 12/156:00 am -
2 stops11h 29m
Deal found 11/7$549
Sun 12/132:40 pm -
1 stop6h 10m
Wed 12/164:43 pm -
1 stop6h 16m
Deal found 11/9$767
Mon 12/1410:40 am -
2 stops11h 19m
Wed 12/166:00 am -
2 stops9h 37m
Deal found 11/9$777

Find flight deals from Idaho Falls to Knoxville

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$469
(American Airlines)

Popular in

February

Cheapest in

October

Average price

$474
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 November 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

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

7:00 am-2:56 pm

1 stop5h 56m

Knoxville McGhee Tyson

Wed 2/3

4:28 pm-9:10 pm

1 stop6h 42m

$509

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Tue 11/24

6:44 am-6:52 pm

2 stops10h 08m

Knoxville McGhee Tyson

Thu 12/3

2:55 pm-9:49 pm

1 stop8h 54m

$527
Quickest round-trip

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sat 12/12

6:35 am-2:41 pm

1 stop6h 06m

Knoxville McGhee Tyson

Tue 12/15

4:43 pm-8:59 pm

1 stop6h 16m

$624

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Mon 12/14

8:00 am-12:05 am

2 stops14h 05m

Knoxville McGhee Tyson

Wed 12/16

5:30 am-1:11 pm

1 stop9h 41m

$772

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sun 12/13

1:41 pm-11:40 pm

1 stop7h 59m

Knoxville McGhee Tyson

Wed 12/16

12:19 pm-11:02 pm

2 stops12h 43m

$772

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Mon 12/14

2:40 pm-10:50 pm

1 stop6h 10m

Knoxville McGhee Tyson

Thu 12/17

5:30 am-3:38 pm

2 stops12h 08m

$772

Idaho FallsKnoxville

IDA Idaho Falls Fanning Field - TYS Knoxville McGhee Tyson

IDATYS

Idaho Falls Fanning Field

Sun 12/13

10:40 am-11:59 pm

2 stops11h 19m

Knoxville McGhee Tyson

Wed 12/16

6:00 am-1:37 pm

2 stops9h 37m

$777

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

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
7.3
Good
10,471 reviews

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.3

Crew

8.1

Comfort

7.3

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
10,471 reviews
United Airlines
7.3
Good
10,471 reviews

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.3

Crew

8.1

Comfort

7.3

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
12,224 reviews
United Airlines
7.3
Good
10,471 reviews

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.3

Crew

8.1

Comfort

7.3

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 56m. Fly via United Airlines or American Airlines 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 $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
Newport
Bryson City
Crossville
Morristown
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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