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Idaho Falls

$370+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IDA
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
1 adult, Economy
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Cheap 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 May 10, 2026.

This American Airlines deal was found by Cheapflights users on 5/9. 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 7/307:02 am
TYS
-
IDA
1 stop8h 21m
American Airlines
Wed 8/52:20 pm
IDA
-
TYS
1 stop6h 58m
American Airlines
Deal found 5/9$517
This American Airlines deal was found by Cheapflights users on 5/5. 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 8/86:00 am
TYS
-
IDA
1 stop7h 30m
American Airlines
Sat 8/152:20 pm
IDA
-
TYS
1 stop6h 58m
American Airlines
Deal found 5/5$539
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Fri 9/41:46 pm
TYS
-
IDA
1 stop9h 34m
American Airlines
Sun 9/62:20 pm
IDA
-
TYS
1 stop6h 58m
American Airlines
Deal found 5/8$583
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Mon 6/85:33 pm
TYS
-
IDA
1 stop6h 42m
American Airlines
Fri 6/122:26 pm
IDA
-
TYS
1 stop7h 29m
American Airlines
Deal found 5/8$588
This American Airlines deal was found by Cheapflights users on 5/7. 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 9/21:46 pm
TYS
-
IDA
1 stop9h 34m
American Airlines
Sun 9/67:00 am
IDA
-
TYS
1 stop7h 42m
American Airlines
Deal found 5/7$591
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Tue 9/112:09 pm
TYS
-
IDA
2 stops11h 11m
American Airlines
Wed 9/91:44 pm
IDA
-
TYS
1 stop5h 31m
American Airlines
Deal found 5/7$596
This United Airlines deal was found by Cheapflights users on 5/8. 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 8/169:00 am
TYS
-
IDA
1 stop6h 29m
United Airlines
Thu 8/202:25 pm
IDA
-
TYS
1 stop6h 19m
United Airlines
Deal found 5/8$604
This American Airlines deal was found by Cheapflights users on 5/7. 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 9/31:46 pm
TYS
-
IDA
1 stop9h 34m
American Airlines
Wed 9/91:44 pm
IDA
-
TYS
1 stop5h 31m
American Airlines
Deal found 5/7$611
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Mon 8/35:31 pm
TYS
-
IDA
1 stop6h 40m
American Airlines
Thu 8/62:20 pm
IDA
-
TYS
1 stop6h 58m
American Airlines
Deal found 5/8$613
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Tue 9/112:09 pm
TYS
-
IDA
2 stops11h 11m
American Airlines
Thu 9/101:44 pm
IDA
-
TYS
1 stop5h 31m
American Airlines
Deal found 5/7$616

Find 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 May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$517
(American Airlines)

One-way from

$370
(American Airlines)
Provider with most accurate pricing for Knoxville McGhee Tyson-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Idaho Falls Fanning Field flights.
Search Deals
From Knoxville McGhee Tyson to Idaho Falls Fanning Field
Search Deals
One-way flight from Knoxville McGhee Tyson to Idaho Falls Fanning Field
Search Deals

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 May 10, 2026.
Use the filters below to find and compare flights from Knoxville to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 8/8

6:00 am-11:30 am

1 stop7h 30m

Idaho Falls Fanning Field

Sat 8/15

2:20 pm-11:18 pm

1 stop6h 58m

$539
Quickest round-trip

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sun 8/16

9:00 am-1:29 pm

1 stop6h 29m

Idaho Falls Fanning Field

Thu 8/20

2:25 pm-10:44 pm

1 stop6h 19m

$604

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Tue 9/1

5:45 am-3:29 pm

2 stops11h 44m

Idaho Falls Fanning Field

Tue 9/8

2:30 pm-10:38 pm

1 stop6h 08m

$645

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Wed 9/2

6:00 am-3:37 pm

2 stops11h 37m

Idaho Falls Fanning Field

Tue 9/8

6:18 am-11:18 pm

2 stops15h 00m

$679

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 8/8

6:00 am-9:50 am

2 stops29h 50m

Idaho Falls Fanning Field

Sat 8/15

5:53 pm-9:48 am

2 stops13h 55m

$699

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Wed 7/1

6:43 pm-1:23 pm

1 stop20h 40m

Idaho Falls Fanning Field

Wed 7/8

12:53 pm-12:30 pm

1 stop21h 37m

$716

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Tue 6/30

6:00 am-9:50 am

2 stops29h 50m

Idaho Falls Fanning Field

Tue 7/7

2:30 pm-10:19 pm

1 stop5h 49m

$739

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Tue 6/30

5:37 am-11:47 am

1 stop8h 10m

Idaho Falls Fanning Field

Tue 7/7

7:00 am-4:41 pm

1 stop7h 41m

$769
Cheapest one-way

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 5/16

2:45 pm-10:42 pm

2 stops9h 57m

$395
Quickest one-way

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 5/16

4:20 pm-9:03 pm

1 stop6h 43m

$490

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Idaho Falls flight deals on Cheapflights vs. FlightHub >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 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 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.

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 May 10, 2026.
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
9,694 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,694 reviews
United Airlines
7.4
Good
9,694 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,667 reviews
United Airlines
7.4
Good
9,694 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 6h 29m. American Airlines provides one of the quickest options available for as low as $604. Airlines will cover a distance of 1575 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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.

  • 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.

See more FAQs

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
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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 May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$553FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$384Average$615FlexibilityNo cancel feeOn-time69%

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