IDA - TYS

$341 Find Cheap Flights from Idaho Falls to Knoxville

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to Knoxville departing on 3/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Knoxville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Knoxville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Knoxville, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$379
American Airlines
Tue 3/31Tue 4/7
IDA - TYS • 1 stop
Cheapest one-way
$485
American Airlines
Fri 4/10
IDA - TYS • 1 stop
Top airlines
Cheapest • from $379 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Idaho Falls and Knoxville. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $451 (round-trip)
Shortest trip • 6h 55m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Knoxville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Idaho Falls to Knoxville (IDA-TYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to Knoxville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Idaho Falls to Knoxville

Tue, Mar 31 - Tue, Apr 7
American Airlines Logo
2:18 pm - 11:20 pm
IDA
-
TYS
7h 02m
1 stop
American Airlines Logo
1:20 pm - 11:39 pm
TYS
-
IDA
12h 19m
2 stops
$379American Airlines
Tue, Mar 31 - Tue, Apr 7
American Airlines Logo
6:05 am - 5:31 pm
IDA
-
TYS
9h 26m
2 stops
American Airlines Logo
1:20 pm - 11:39 pm
TYS
-
IDA
12h 19m
2 stops
$385American Airlines
Tue, Mar 31 - Sat, Apr 4
American Airlines Logo
2:18 pm - 11:20 pm
IDA
-
TYS
7h 02m
1 stop
American Airlines Logo
12:21 pm - 11:24 pm
TYS
-
IDA
13h 03m
2 stops
$404American Airlines
Tue, Mar 31 - Sat, Apr 4
American Airlines Logo
6:05 am - 5:31 pm
IDA
-
TYS
9h 26m
2 stops
American Airlines Logo
12:21 pm - 11:24 pm
TYS
-
IDA
13h 03m
2 stops
$409American Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
2:30 pm - 10:38 pm
IDA
-
TYS
6h 08m
1 stop
United Airlines Logo
8:48 am - 1:24 pm
TYS
-
IDA
6h 36m
1 stop
$439United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
2:30 pm - 10:38 pm
IDA
-
TYS
6h 08m
1 stop
United Airlines Logo
8:48 am - 1:24 pm
TYS
-
IDA
6h 36m
1 stop
$459United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
2:30 pm - 10:38 pm
IDA
-
TYS
6h 08m
1 stop
United Airlines Logo
7:15 am - 3:29 pm
TYS
-
IDA
10h 14m
2 stops
$505United Airlines
Tue, Mar 31 - Sat, Apr 4
United Airlines Logo
2:30 pm - 10:29 pm
IDA
-
TYS
5h 59m
1 stop
United Airlines Logo
8:30 am - 1:24 pm
TYS
-
IDA
6h 54m
1 stop
$522United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
2:30 pm - 10:38 pm
IDA
-
TYS
6h 08m
1 stop
United Airlines Logo
5:45 am - 5:16 pm
TYS
-
IDA
13h 31m
2 stops
$525United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
2:30 pm - 10:38 pm
IDA
-
TYS
6h 08m
1 stop
United Airlines Logo
7:15 am - 3:29 pm
TYS
-
IDA
10h 14m
2 stops
$534United Airlines
Booking Insights

KAYAK's insights & trends for Idaho Falls to Knoxville flights

Get data-powered insights and trends into flights from Idaho Falls to Knoxville to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Idaho Falls to Knoxville?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Idaho Falls to Knoxville were found on American Airlines ($379) and United Airlines ($439).

Good to know

Low seasonNovember
Cheapest flight$379
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from Idaho Falls to Knoxville

When to book flights from Idaho Falls to Knoxville

Are your dates flexible? Find out the best times to travel from Idaho Falls to Knoxville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Idaho Falls to Knoxville

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

    In the last 3 days, the lowest price for a flight from Idaho Falls to Knoxville was $341 for a one-way ticket and $379 for a round-trip.

  • Do I need a passport to fly between Idaho Falls and Knoxville?

    No, a passport isn't needed to fly from Idaho Falls to Knoxville. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Idaho Falls to Knoxville?

    On your way to Knoxville, you’ll fly out from Idaho Falls Fanning Field. You’ll be landing at Knoxville McGhee Tyson.

  • Which aircraft models fly most regularly from Idaho Falls to Knoxville?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Idaho Falls to Knoxville?

    oneworld, and Star Alliance are the airline alliances operating flights between Idaho Falls and Knoxville, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Idaho Falls to Knoxville, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Idaho Falls to Knoxville are United Airlines and American Airlines. With an average price for the route of $548 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $600 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Idaho Falls to Knoxville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Idaho Falls to Knoxville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho Falls to Knoxville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from Idaho Falls is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Idaho Falls to Knoxville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Knoxville with an airline and back to Idaho Falls with another airline. Booking your flights between Idaho Falls and TYS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho Falls to Knoxville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Knoxville from Idaho Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Idaho Falls to Knoxville

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Knoxville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Idaho Falls to Knoxville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9431 reviews
7.7Boarding
6.6Food
7.1Entertainment
7.3Comfort
8.1Crew
Airline reviews

OK, we were delayed and had to de plane and reboard.

6.0 GoodJamie, Mar 2026
LAX - EWR
Read more United Airlines reviews

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Everything you need to know for your flight from Idaho Falls to Knoxville

Information on your arrival and departure airports