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$205+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — TYS
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Idaho Falls to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Knoxville (TYS). 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 September 17, 2025.

Round-trip from

$404
(American Airlines)

One-way from

$205
(Kiwi.com)

Popular in

February

Cheapest in

April

Average price

$468
From Idaho Falls Fanning Field to Knoxville McGhee Tyson
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One-way flight from Idaho Falls Fanning Field to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 32% potential increase in price ($288 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Idaho Falls to Knoxville

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 September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/2912:55 pmIDA - TYS
1 stop6h 08mAmerican Airlines
Sat 11/15:15 amTYS - IDA
1 stop9h 10mAmerican Airlines
Deal found 9/15$404
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/298:30 amIDA - TYS
2 stops13h 29mUnited Airlines
Sat 11/15:45 amTYS - IDA
2 stops9h 50mUnited Airlines
Deal found 9/15$473
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/212:41 pmIDA - TYS
2 stops9h 26mAmerican Airlines
Mon 10/62:21 pmTYS - IDA
1 stop9h 28mAmerican Airlines
Deal found 9/17$524
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:55 pmIDA - TYS
2 stops36h 48mMultiple Airlines
Mon 9/298:30 amTYS - IDA
1 stop8h 19mMultiple Airlines
Deal found 9/15$562
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 9/305:00 amIDA - TYS
1 stop8h 06mUnited Airlines
Sat 10/47:00 amTYS - IDA
2 stops28h 48mUnited Airlines
Deal found 9/15$613
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/265:00 amIDA - TYS
1 stop8h 11mUnited Airlines
Mon 9/294:40 pmTYS - IDA
1 stop22h 53mUnited Airlines
Deal found 9/15$739
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Thu 10/25:00 amIDA - TYS
2 stops12h 52mUnited Airlines
Mon 10/65:53 pmTYS - IDA
2 stops17h 55mUnited Airlines
Deal found 9/17$754

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Knoxville 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 September 17, 2025.
Use the filters below to find and compare flights from Idaho Falls to Knoxville that are best for you.

Fly from

Idaho Falls

Fly to

Knoxville

Route

Depart

Return

Price

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Wed 10/29

12:55 pm-9:03 pm

1 stop6h 08m

Knoxville McGhee Tyson

Sat 11/1

5:15 am-12:25 pm

1 stop9h 10m

$404

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Thu 10/2

12:41 pm-12:07 am

2 stops9h 26m

Knoxville McGhee Tyson

Mon 10/6

2:21 pm-9:49 pm

1 stop9h 28m

$524

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sat 3/7

2:35 pm-8:59 am

2 stops16h 24m

Knoxville McGhee Tyson

Wed 3/11

4:25 pm-9:08 pm

1 stop6h 43m

$534

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Tue 9/30

5:00 am-3:06 pm

1 stop8h 06m

Knoxville McGhee Tyson

Sat 10/4

7:00 am-9:48 am

2 stops28h 48m

$613

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Thu 10/23

10:13 pm-2:19 pm

1 stop14h 06m

$205

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Thu 10/23

10:13 pm-7:32 pm

2 stops19h 19m

$270

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Wed 11/19

1:58 pm-12:08 am

1 stop8h 10m

$271

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 9/22

1:35 pm-12:21 am

1 stop8h 46m

$371

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 9/22

5:56 pm-10:45 pm

2 stops26h 49m

$565

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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
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

Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated September 17, 2025.
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
8,926 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Knoxville. 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 Idaho Falls to Knoxville?

    There are many flights that can get you from Idaho Falls to Knoxville in 6h 08m. Fly via American Airlines or United 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 American Airlines. Our recent data shows that you can find tickets from as low as $288 on this airline. An additional option worth looking into is United Airlines, starting at $388. American Airlines is currently priced 52% 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.

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

    Currently, January is the cheapest month in which you can book a flight from Idaho Falls to Knoxville (average of $295). Flying from Idaho Falls to Knoxville in March is currently the most expensive (average of $376). 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?

Book flights to Knoxville if you plan to visit one of these locations
Morristown
Cherokee
Corbin
Alcoa
Oak Ridge
Murphy

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Idaho Falls to Knoxville

Discover the top 2 airlines that operate flights from Idaho Falls to Knoxville. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$505FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$388Average$548FlexibilityNo cancel feeOn-time69%

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