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Idaho Falls

$246+ Cheap flights from Knoxville to Idaho Falls (TYS - IDA)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IDA
Jun 20 — Jun 271
Fri 6/20
Fri 6/27
1 adult, Economy
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Cheap flight deals from Knoxville to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Idaho Falls (IDA). 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 June 15, 2025.

Round-trip from

$390
(American Airlines)

One-way from

$246
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$484
From Knoxville McGhee Tyson to Idaho Falls Fanning Field
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One-way flight from Knoxville McGhee Tyson to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 9% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Knoxville to Idaho Falls

Cheapest flights from Knoxville to Idaho Falls
Explore the most affordable flight options available from Knoxville to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2025.

This American Airlines deal was found by Cheapflights users on 6/14. 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.
Sat 9/274:37 pmTYS - IDA
1 stop6h 48mAmerican Airlines
Sun 10/512:43 pmIDA - TYS
1 stop6h 17mAmerican Airlines
Deal found 6/14$390
This Mytrip deal was found by Cheapflights users on 6/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/255:37 pmTYS - IDA
2 stops29h 07mMultiple Airlines
Sun 7/275:49 pmIDA - TYS
2 stops20h 23mMultiple Airlines
Deal found 6/14$465
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Sat 9/2710:51 amTYS - IDA
2 stops8h 27mUnited Airlines
Sun 10/55:56 pmIDA - TYS
2 stops26h 54mUnited Airlines
Deal found 6/14$578

Cheapflights Fare Finder

Customize your flight search to find flights from Knoxville to Idaho Falls 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 June 15, 2025.
Use the filters below to find and compare flights from Knoxville to Idaho Falls that are best for you.

Fly from

Knoxville

Fly to

Idaho Falls

Route

Depart

Return

Price

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 9/27

4:37 pm-9:25 pm

1 stop6h 48m

Idaho Falls Fanning Field

Sun 10/5

12:43 pm-9:00 pm

1 stop6h 17m

$390

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 7/25

5:37 pm-8:44 pm

2 stops29h 07m

Idaho Falls Fanning Field

Sun 7/27

5:49 pm-4:12 pm

2 stops20h 23m

$465

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 9/27

10:51 am-5:18 pm

2 stops8h 27m

Idaho Falls Fanning Field

Sun 10/5

5:56 pm-10:50 pm

2 stops26h 54m

$578

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 9/19

2:07 pm-9:25 pm

1 stop9h 18m

$246

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 9/19

2:00 pm-10:48 pm

2 stops10h 48m

$338

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 6/20

5:37 pm-9:16 pm

2 stops29h 39m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Best time to book a flight from Knoxville to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Knoxville 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 Knoxville to Idaho Falls

What is the cheapest month to book a flight from Knoxville to Idaho Falls?

Currently, October is the cheapest month in which you can book a flight from Knoxville to Idaho Falls (average of $380). Flying from Knoxville to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Knoxville to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 15, 2025.

One of the essential ways to save on airfare from Knoxville to Idaho Falls is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 28% on airfare.

Rainfall in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

Temperature in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho Falls, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated June 15, 2025.
United Airlines
7.4
Good
8,798 reviews

Comfort

7.3

Entertainment

7.0

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,798 reviews
United Airlines
7.4
Good
8,798 reviews

Comfort

7.3

Entertainment

7.0

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Allegiant Air
7.3
Good
722 reviews
United Airlines
7.4
Good
8,798 reviews

Comfort

7.3

Entertainment

7.0

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,798 reviews

Comfort

7.3

Entertainment

7.0

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Currently priced at $390, American Airlines will fly you from Knoxville to Idaho Falls and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $578. You may be able to fly from Knoxville to Idaho Falls for 27% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Knoxville to Idaho Falls one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $246. However, be on the lookout for offers from United Airlines and Allegiant Air, as they are both options that can get you from Knoxville to Idaho Falls for a low price.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Knoxville to Idaho Falls?

    Currently, October is the cheapest month in which you can book a flight from Knoxville to Idaho Falls (average of $380). Flying from Knoxville to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Knoxville?

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Top 2 airlines flying from Knoxville to Idaho Falls

Discover the top 2 airlines that operate flights from Knoxville to Idaho Falls. 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 June 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$298Average$567FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$428Average$584FlexibilityNo cancel feeOn-time69%

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