$231 Cheap Flights from Idaho Falls (IDA) to Knoxville (TYS)

View $231 flight on Tue, Nov 18, 2025Opens in a new window

Popular airlines from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)

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

Prices were available within the past 7 days and start at $231 for one-way flights and $294 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Nov 18 - Mon, Nov 24
IDA
Idaho Falls
TYS
Knoxville
$294 Roundtrip, found 14 hours ago
$294
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, Nov 18 from Idaho Falls to Knoxville, returning Mon, Nov 24, priced at $294 found 14 hours ago
Delta
Tue, Nov 4 - Tue, Nov 18
IDA
Idaho Falls
TYS
Knoxville
$299 Roundtrip, found 16 hours ago
$299
Roundtrip
found 16 hours ago
Select Delta flight, departing Tue, Nov 4 from Idaho Falls to Knoxville, returning Tue, Nov 18, priced at $299 found 16 hours ago
Delta
Mon, Nov 17 - Thu, Nov 27
IDA
Idaho Falls
TYS
Knoxville
$324 Roundtrip, found 14 hours ago
$324
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Nov 17 from Idaho Falls to Knoxville, returning Thu, Nov 27, priced at $324 found 14 hours ago
United
Thu, Jan 15 - Sat, Jan 17
IDA
Idaho Falls
TYS
Knoxville
$333 Roundtrip, found 6 days ago
$333
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jan 15 from Idaho Falls to Knoxville, returning Sat, Jan 17, priced at $333 found 6 days ago
United
Thu, Jan 15 - Sat, Jan 17
IDA
Idaho Falls
TYS
Knoxville
$336 Roundtrip, found 6 days ago
$336
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jan 15 from Idaho Falls to Knoxville, returning Sat, Jan 17, priced at $336 found 6 days ago
United
Sat, Nov 1 - Thu, Nov 6
IDA
Idaho Falls
TYS
Knoxville
$347 Roundtrip, found 2 days ago
$347
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 1 from Idaho Falls to Knoxville, returning Thu, Nov 6, priced at $347 found 2 days ago
United
Sat, Nov 1 - Thu, Nov 6
IDA
Idaho Falls
TYS
Knoxville
$354 Roundtrip, found 2 days ago
$354
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 1 from Idaho Falls to Knoxville, returning Thu, Nov 6, priced at $354 found 2 days ago
Delta
Sat, Nov 8 - Tue, Nov 18
IDA
Idaho Falls
TYS
Knoxville
$354 Roundtrip, found 16 hours ago
$354
Roundtrip
found 16 hours ago
Select Delta flight, departing Sat, Nov 8 from Idaho Falls to Knoxville, returning Tue, Nov 18, priced at $354 found 16 hours ago
United
Thu, Jan 15 - Sat, Jan 17
IDA
Idaho Falls
TYS
Knoxville
$362 Roundtrip, found 6 days ago
$362
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jan 15 from Idaho Falls to Knoxville, returning Sat, Jan 17, priced at $362 found 6 days ago
Alaska Airlines
Sat, Nov 1 - Sat, Nov 15
IDA
Idaho Falls
TYS
Knoxville
$478 Roundtrip, found 5 days ago
$478
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, Nov 1 from Idaho Falls to Knoxville, returning Sat, Nov 15, priced at $478 found 5 days ago

Find the cheapest month to fly from Idaho Falls (IDA) to Knoxville (TYS)

August is typically the cheapest month to fly

From $288 - $2,297 per traveler.

Graph displaying average flight prices per month

Alternative airports near Knoxville

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to McGhee Tyson TYS. Cheapest and Closest option available. Average driving time to city center is 22 minutes. Flights from $2,340
TYS
McGhee Tyson
CheapestClosest
Average driving time to city center22 min
Flights from $2,340
Flights from Idaho Falls (IDA) to Knoxville (TYS)
Origin airport
Idaho Falls Regional
Destination airport
McGhee Tyson
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$294
Distance
1576 mi

Idaho Falls to Knoxville Flights

The cheapest times to fly from Idaho Falls to Knoxville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Idaho Falls to Knoxville are during the month of November. You can find some of the cheapest flights from Idaho Falls to Knoxville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Idaho Falls to Knoxville

Sunday is one of the best days to book for cheap flights from Idaho Falls to Knoxville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Idaho Falls to Knoxville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Idaho Falls to Knoxville in 2025. You can also book with separate airlines for your outbound and return journeys, from $231 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Idaho Falls to Knoxville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Idaho Falls to Knoxville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS) cost?
Get a cheap one-way flight from $231 or cheap return flight from $294 from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)?
November is the least expensive month to fly from IDA to TYS. Traveling outside of peak seasons is often the key to finding a great deal.
What is the cheapest airline that flies from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IDA to TYS flight.
How many flights per day from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)?
Direct flights from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IDA to TYS?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)?
To reach McGhee Tyson Airport (TYS) without delays, select a flight that leaves from Idaho Falls Regional Airport (IDA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS) last-minute?
Booking your flight from IDA to TYS shortly before your journey is typically more expensive. But if there's some wiggle room with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book an IDA to TYS flight and hotel package?
Securing an IDA to TYS flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our extensive range of hotels and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Idaho Falls Regional Airport (IDA) to McGhee Tyson Airport (TYS)?
If you reserved your IDA to TYS flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.