HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$494+ Cheap flights from Knoxville to Idaho Falls (TYS - IDA)

This is the cheapest round-trip 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
dic. 10 — dic. 171
mié. 12/10
mié. 12/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Idaho Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 noviembre 10, 2025.

This Delta deal was found by Cheapflights users on 11/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/153:53 pmTYS - IDA
2 stops8h 40mDelta
mar. 11/186:57 pmIDA - TYS
2 stops12h 40mDelta
Deal found 11/8$494
This United Airlines deal was found by Cheapflights users on 11/8. 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.
sáb. 11/156:45 amTYS - IDA
2 stops13h 01mUnited Airlines
mar. 11/187:00 amIDA - TYS
1 stop5h 43mUnited Airlines
Deal found 11/8$544
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/261:06 pmTYS - IDA
2 stops25h 56mMultiple Airlines
dom. 11/309:32 pmIDA - TYS
1 stop23h 15mMultiple Airlines
Deal found 11/9$566
This American Airlines deal was found by Cheapflights users on 11/9. 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.
sáb. 11/155:05 amTYS - IDA
2 stops10h 23mAmerican Airlines
mar. 11/187:10 amIDA - TYS
2 stops11h 53mAmerican Airlines
Deal found 11/9$584
This United Airlines deal was found by Cheapflights users on 11/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/234:55 pmTYS - IDA
1 stop18h 53mUnited Airlines
jue. 11/275:00 amIDA - TYS
2 stops10h 08mUnited Airlines
Deal found 11/7$588
This United Airlines deal was found by Cheapflights users on 11/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/278:50 amTYS - IDA
1 stop6h 45mUnited Airlines
lun. 12/15:00 amIDA - TYS
2 stops27h 48mUnited Airlines
Deal found 11/9$672
This United Airlines deal was found by Cheapflights users on 11/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/264:55 pmTYS - IDA
1 stop7h 57mUnited Airlines
dom. 11/309:35 pmIDA - TYS
1 stop22h 55mUnited Airlines
Deal found 11/9$677
This United Airlines deal was found by Cheapflights users on 11/8. 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.
mar. 11/1810:50 amTYS - IDA
2 stops12h 13mUnited Airlines
mié. 11/2610:50 amIDA - TYS
2 stops11h 09mUnited Airlines
Deal found 11/8$741

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 noviembre 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$494
(Delta)

Popular in

December

Cheapest in

January
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
Highest demand for flights based on searches. 6% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($36 potential savings vs. average RT price).
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 noviembre 10, 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

mié. 11/26

1:06 pm-1:02 pm

2 stops25h 56m

Idaho Falls Fanning Field

dom. 11/30

9:32 pm-10:47 pm

1 stop23h 15m

$566

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

dom. 11/23

5:45 am-3:16 pm

2 stops11h 31m

Idaho Falls Fanning Field

jue. 11/27

5:00 am-5:08 pm

2 stops10h 08m

$579

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

jue. 11/27

8:50 am-1:35 pm

1 stop6h 45m

Idaho Falls Fanning Field

lun. 12/1

5:00 am-10:48 am

2 stops27h 48m

$672

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

mié. 11/26

4:55 pm-10:52 pm

1 stop7h 57m

Idaho Falls Fanning Field

dom. 11/30

9:35 pm-10:30 pm

1 stop22h 55m

$677

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

vie. 12/19

5:23 am-12:46 pm

1 stop9h 23m

Idaho Falls Fanning Field

dom. 12/21

1:16 pm-11:45 pm

1 stop8h 29m

$763

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

dom. 11/23

5:05 am-1:27 pm

2 stops10h 22m

Idaho Falls Fanning Field

jue. 11/27

7:10 am-8:34 am

3 stops23h 24m

$784

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 November.
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 $278). Flying from Knoxville to Idaho Falls in March is currently the most expensive (average of $517). 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 noviembre 10, 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 noviembre 10, 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
9,012 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

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
9,012 reviews
United Airlines
7.4
Good
9,012 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

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
11,050 reviews
United Airlines
7.4
Good
9,012 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

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 11h 31m. United Airlines provides one of the quickest options available for as low as $579. 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 46% less than the average price by searching for these airlines.

  • 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 $278). Flying from Knoxville to Idaho Falls in March is currently the most expensive (average of $517). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Jackson flights
Nashville to Spokane flights
Memphis to Boise flights
Knoxville to Boise flights
Nashville to Boise flights
Knoxville to Jackson flights
Memphis to Jackson flights
Nashville to Hailey flights
Memphis to Idaho Falls flights
Nashville to Idaho Falls flights
Knoxville to Spokane flights
Chattanooga to Boise flights
Blountville to Spokane flights
Nashville to Pocatello flights
Memphis to Spokane flights
Blountville to Jackson flights
Chattanooga to Jackson flights
Chattanooga to Spokane flights
Nashville to West Yellowstone flights
Knoxville to Pocatello flights
Memphis to Pocatello flights
Chattanooga to Lewiston flights
Knoxville to Lewiston flights
Memphis to West Yellowstone flights
Chattanooga to West Yellowstone flights

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 noviembre 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$567FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$384Average$584FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights