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Idaho Falls

$262+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IDA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:15 amTYS - IDA
2 stops8h 18mDelta
Tue 11/46:53 pmIDA - TYS
2 stops12h 07mDelta
Deal found 10/30$529
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/14:50 pmTYS - IDA
1 stop6h 13mUnited Airlines
Wed 11/57:00 amIDA - TYS
1 stop5h 43mUnited Airlines
Deal found 10/28$574
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/18:09 amTYS - IDA
1 stop6h 15mAmerican Airlines
Tue 11/47:10 amIDA - TYS
2 stops13h 41mAmerican Airlines
Deal found 10/30$614
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/207:23 pmTYS - IDA
2 stops16h 35mUnited Airlines
Sat 12/275:00 amIDA - TYS
2 stops15h 39mUnited Airlines
Deal found 10/29$624
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 11/238:50 amTYS - IDA
1 stop6h 45mUnited Airlines
Sun 11/307:00 amIDA - TYS
2 stops25h 05mUnited Airlines
Deal found 10/30$668
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 11/276:30 amTYS - IDA
2 stops11h 16mAmerican Airlines
Mon 12/11:58 pmIDA - TYS
1 stop7h 54mAmerican Airlines
Deal found 10/30$671
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 11/284:55 pmTYS - IDA
1 stop18h 53mUnited Airlines
Fri 12/54:19 pmIDA - TYS
2 stops15h 54mUnited Airlines
Deal found 10/29$683

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$624
(United Airlines)

One-way from

$262
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$439
Provider with most accurate pricing for Knoxville McGhee Tyson-Idaho Falls Fanning Field flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Idaho Falls Fanning Field flights.
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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. 24% potential increase in price ($190 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 30, 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 12/20

7:23 pm-9:58 am

2 stops16h 35m

Idaho Falls Fanning Field

Sat 12/27

5:00 am-10:39 pm

2 stops15h 39m

$624

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sun 11/23

8:50 am-1:35 pm

1 stop6h 45m

Idaho Falls Fanning Field

Sun 11/30

7:00 am-10:05 am

2 stops25h 05m

$668

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 11/28

4:55 pm-9:48 am

1 stop18h 53m

Idaho Falls Fanning Field

Fri 12/5

4:19 pm-10:13 am

2 stops15h 54m

$683

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Thu 11/27

5:45 am-1:35 pm

2 stops9h 50m

Idaho Falls Fanning Field

Mon 12/1

5:00 am-10:48 am

2 stops27h 48m

$687

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Thu 11/27

6:30 am-3:46 pm

2 stops11h 16m

Idaho Falls Fanning Field

Mon 12/1

1:58 pm-11:52 pm

1 stop7h 54m

$694

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 12/20

6:20 pm-12:46 pm

1 stop20h 26m

Idaho Falls Fanning Field

Sat 12/27

1:16 pm-11:28 am

1 stop20h 12m

$792

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 11/15

6:12 pm-1:07 pm

3 stops44h 55m

$262

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 11/15

8:50 am-1:35 pm

1 stop6h 45m

$306

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 11/15

12:08 pm-10:34 pm

2 stops12h 26m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Compare providers for flights from Knoxville to Idaho Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Idaho Falls in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Knoxville-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Knoxville-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Idaho Falls flights, Cheapflights users trust eDreams the most. eDreams 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 Knoxville-Idaho Falls 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 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 $279). Flying from Knoxville to Idaho Falls in December is currently the most expensive (average of $507). 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 October 30, 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 27% on airfare.

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 October 30, 2025.
Get a feel of what it's like to fly with United Airlines and American Airlines from Knoxville to Idaho Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,035 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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.

  • How long is the flight from Knoxville to Idaho Falls?

    A quick flight from Knoxville to Idaho Falls can take about 16h 35m. United Airlines provides one of the quickest options available for as low as $624. Airlines will cover a distance of 1575 mi.

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

    Currently priced at $288, 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 $384. You may be able to fly from Knoxville to Idaho Falls for 50% 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 Allegiant Air, with whom users have recently found tickets for as low as $262. However, be on the lookout for offers from United Airlines and American Airlines, 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 $279). Flying from Knoxville to Idaho Falls in December is currently the most expensive (average of $507). 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 Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$567FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$384Average$584FlexibilityNo cancel feeOn-time69%

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