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Cheap flights from Idaho Falls to Knoxville from $455

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Knoxville departing on 1/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Idaho Falls to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:40 pm - 10:31 pm
IDA
-
TYS
5h 51m1 stop
United Airlines Logo
4:25 pm - 9:14 pm
TYS
-
IDA
6h 49m1 stop
$455United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:40 pm - 10:31 pm
IDA
-
TYS
5h 51m1 stop
United Airlines Logo
11:10 am - 9:14 pm
TYS
-
IDA
12h 04m2 stops
$460United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
4:19 pm - 10:31 pm
IDA
-
TYS
28h 12m1 stop
United Airlines Logo
4:25 pm - 9:14 pm
TYS
-
IDA
6h 49m1 stop
$473United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
4:19 pm - 10:31 pm
IDA
-
TYS
28h 12m1 stop
United Airlines Logo
6:59 am - 3:31 pm
TYS
-
IDA
10h 32m2 stops
$478United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
4:19 pm - 11:44 pm
IDA
-
TYS
29h 25m2 stops
United Airlines Logo
9:30 am - 9:14 pm
TYS
-
IDA
13h 44m2 stops
$483United Airlines
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
2:30 pm - 10:57 am
IDA
-
TYS
18h 27m2 stops
United Airlines Logo
8:45 am - 3:31 pm
TYS
-
IDA
8h 46m1 stop
$678United Airlines
Mon, Jan 5 - Fri, Jan 30
United Airlines Logo
2:30 pm - 10:57 am
IDA
-
TYS
18h 27m2 stops
United Airlines Logo
6:45 am - 3:31 pm
TYS
-
IDA
10h 46m2 stops
$683United Airlines
Mon, Jan 5 - Fri, Jan 30
United Airlines Logo
4:05 pm - 10:31 pm
IDA
-
TYS
28h 26m1 stop
United Airlines Logo
8:45 am - 3:31 pm
TYS
-
IDA
8h 46m1 stop
$733United Airlines
Mon, Jan 5 - Fri, Jan 30
United Airlines Logo
2:30 pm - 10:29 pm
IDA
-
TYS
5h 59m1 stop
United Airlines Logo
6:59 am - 3:31 pm
TYS
-
IDA
10h 32m2 stops
$864United Airlines
Sun, Jan 4 - Thu, Jan 8
American Airlines Logo
7:00 am - 12:38 am
IDA
-
TYS
15h 38m2 stops
American Airlines Logo
10:11 am - 10:36 pm
TYS
-
IDA
14h 25m2 stops
$916American Airlines
Sun, Jan 4 - Thu, Jan 8

United Airlines flights from Idaho Falls to Knoxville

Our best United Airlines deals on Idaho Falls to Knoxville flight tickets
United Airlines
Jan 23
IDA2:40 pmIdaho Falls Fanning Field
5h 51m
1 stop
TYS10:31 pmKnoxville McGhee Tyson
Jan 27
TYS4:25 pmKnoxville McGhee Tyson
6h 49m
1 stop
IDA9:14 pmIdaho Falls Fanning Field
$455
Find similar
United Airlines
Jan 23
IDA2:40 pmIdaho Falls Fanning Field
5h 51m
1 stop
TYS10:31 pmKnoxville McGhee Tyson
Jan 27
TYS11:10 amKnoxville McGhee Tyson
12h 04m
2 stops
IDA9:14 pmIdaho Falls Fanning Field
$460
Find similar
United Airlines
Jan 23
IDA4:19 pmIdaho Falls Fanning Field
28h 12m
1 stop
TYS10:31 pmKnoxville McGhee Tyson
Jan 27
TYS4:25 pmKnoxville McGhee Tyson
6h 49m
1 stop
IDA9:14 pmIdaho Falls Fanning Field
$473
Find similar

American Airlines flights from Idaho Falls to Knoxville

Our best American Airlines deals on Idaho Falls to Knoxville flight tickets
American Airlines
Jan 4
IDA7:00 amIdaho Falls Fanning Field
15h 38m
2 stops
TYS12:38 amKnoxville McGhee Tyson
Jan 8
TYS10:11 amKnoxville McGhee Tyson
14h 25m
2 stops
IDA10:36 pmIdaho Falls Fanning Field
$916
Find similar
American Airlines
Jan 4
IDA1:16 pmIdaho Falls Fanning Field
8h 29m
1 stop
TYS11:45 pmKnoxville McGhee Tyson
Jan 8
TYS6:00 amKnoxville McGhee Tyson
9h 37m
1 stop
IDA1:37 pmIdaho Falls Fanning Field
$1,050
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 21, 2025.
Use the filters below to find and compare flights from Idaho Falls to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 1/23

2:40 pm-10:31 pm

1 stop5h 51m

Knoxville McGhee Tyson

Tue 1/27

4:25 pm-9:14 pm

1 stop6h 49m

$455

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 1/23

2:40 pm-10:31 pm

1 stop5h 51m

Knoxville McGhee Tyson

Tue 1/27

11:10 am-9:14 pm

2 stops12h 04m

$460

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-10:31 pm

1 stop28h 12m

Knoxville McGhee Tyson

Tue 1/27

4:25 pm-9:14 pm

1 stop6h 49m

$473

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-10:31 pm

1 stop28h 12m

Knoxville McGhee Tyson

Tue 1/27

6:59 am-3:31 pm

2 stops10h 32m

$478

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-11:44 pm

2 stops29h 25m

Knoxville McGhee Tyson

Tue 1/27

9:30 am-9:14 pm

2 stops13h 44m

$483

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 1/5

2:30 pm-10:57 am

2 stops18h 27m

Knoxville McGhee Tyson

Fri 1/30

8:45 am-3:31 pm

1 stop8h 46m

$678

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 1/5

2:30 pm-10:57 am

2 stops18h 27m

Knoxville McGhee Tyson

Fri 1/30

6:45 am-3:31 pm

2 stops10h 46m

$683

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Mon 1/5

4:05 pm-10:31 pm

1 stop28h 26m

Knoxville McGhee Tyson

Fri 1/30

8:45 am-3:31 pm

1 stop8h 46m

$733

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sun 1/4

2:30 pm-10:29 pm

1 stop5h 59m

Knoxville McGhee Tyson

Thu 1/8

6:59 am-3:31 pm

2 stops10h 32m

$864

Idaho FallsKnoxville

IDA - TYS

IDATYS

Idaho Falls Fanning Field

Sun 1/4

7:00 am-12:38 am

2 stops15h 38m

Knoxville McGhee Tyson

Thu 1/8

10:11 am-10:36 pm

2 stops14h 25m

$916

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Knoxville from

How to get the cheapest flight ticket from Idaho Falls to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Idaho Falls to Knoxville is on a Monday. Travelers who choose to depart for Knoxville on a Monday will often find tickets for as low as $552. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Idaho Falls to Knoxville for around $1,098.

What is the cheapest time of day to depart on your flight to Knoxville?

At noon is the cheapest time of day to fly from Idaho Falls to Knoxville when you can find flight prices for as low as $602. Flying to Knoxville at noon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the morning when prices are around $717.

Can stopping save me money on Idaho Falls to Knoxville flights?

You could potentially save up to 7% on your flight if you consider stops on a Idaho Falls to Knoxville flight.

When to book flights from Idaho Falls to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Idaho Falls to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Idaho Falls to Knoxville (IDA to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Knoxville

Fastest flight time

5h 51m

Direct flights

None
The fastest flight from Idaho Falls to Knoxville takes 5h 51m
There are no direct flights from Idaho Falls to Knoxville. There are no popular flight routes from Idaho Falls to Knoxville.
Search flight deals

  • How far is Idaho Falls Fanning Field to Knoxville McGhee Tyson by plane?

    A flight from Idaho Falls Fanning Field to Knoxville McGhee Tyson will travel around 1571.6 mi. A reasonable flight in good conditions will take 5h 51m.

  • When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Idaho Falls Fanning Field Airport to Knoxville McGhee Tyson Airport refresh daily.

  • How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Idaho Falls Fanning Field Airport to Knoxville McGhee Tyson Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The travel and health documents you'll need for your trip to Knoxville McGhee Tyson Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Idaho Falls to Knoxville?

Best airlines flying from Idaho Falls to Knoxville

Compare and see reviews for airlines that fly from Idaho Falls to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $373Free CancellationRating
7.4
9,102 reviews
Search United Airlines flights

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Maryville
Crossville
Murphy
Alcoa
Oak Ridge
Newport
Lenoir City
Kodak
Dandridge
Jefferson City
Clinton
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Knoxville?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Knoxville for you.

Can I find flights from Idaho Falls to Knoxville with flexible booking policies on momondo?

Yes. All flights to Knoxville from Idaho Falls on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Idaho Falls to Knoxville?

Once all potential Idaho Falls to Knoxville flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Idaho Falls to Knoxville right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Knoxville from Idaho Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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