What is the cheapest airline that flies from Idaho to Kentucky?

Frontier, Alaska Airlines, and Delta are the most popular carriers operating from Idaho to Kentucky

What airlines fly to Kentucky?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Kentucky from Idaho according to our data. United Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Kentucky. Keep in mind that there are 4 different airlines that fly to Kentucky on a routine basis, so you have a few additional options to choose from.

How long is the flight from Idaho to Kentucky?

On average, it takes 5h 22m to fly from Idaho to Kentucky if you fly out of Idaho Falls (the most popular airport in Idaho) and into Louisville (the most popular airport in Kentucky). If you’re flying out of Hailey and into Louisville, then the flight time is around 5h 53m.

When did momondo last update prices for flights from Idaho to Kentucky?

Prices for flights from Idaho to Kentucky refresh daily.

How many operators does momondo search for flights from Idaho to Kentucky?

The number of operators available for flights from Idaho to Kentucky is 6 as of December 2025.

How old do you have to be to fly from Idaho to Kentucky?

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 to Kentucky.

What documentation or ID do you need to fly to Kentucky?

The required travel and health documents for your Kentucky trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kentucky. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$91 Cheap Flights from Idaho to Kentucky in 2025/26

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Find the cheapest flights from Idaho to Kentucky

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:19 pm - 9:42 pm

BOI

BNA

8h 23m1 stop

8:22 am - 1:35 pm

BNA

BOI

6h 13m1 stop

$217United Airlines

Tue, Jan 6 - Sat, Jan 10

6:10 am - 1:32 pm

BOI

BNA

6h 22m1 stop

10:43 am - 9:23 pm

BNA

BOI

11h 40m2 stops

$222United Airlines

Tue, Jan 6 - Mon, Jan 12

7:42 pm - 5:40 am

GEG

BNA

7h 58m1 stop

7:00 am - 12:44 pm

BNA

GEG

7h 44m1 stop

$236Alaska Airlines

Tue, Jan 6 - Thu, Jan 8

11:25 am - 9:28 pm

GEG

BNA

8h 03m1 stop

7:35 am - 3:00 pm

BNA

GEG

9h 25m1 stop

$237Delta

Tue, Jan 6 - Wed, Jan 7

6:33 am - 6:38 pm

GEG

BNA

10h 05m2 stops

5:00 pm - 11:11 pm

BNA

GEG

8h 11m1 stop

$242American Airlines

Thu, Jan 8 - Sun, Jan 11

4:16 pm - 4:43 pm

BOI

BNA

23h 27m1 stop

5:43 pm - 11:57 pm

BNA

BOI

7h 14m1 stop

$244Alaska Airlines

Mon, Jan 5 - Tue, Jan 6

6:33 am - 8:07 pm

GEG

BNA

11h 34m2 stops

3:34 pm - 11:11 pm

BNA

GEG

9h 37m2 stops

$247American Airlines

Thu, Jan 8 - Sun, Jan 11

7:25 pm - 8:53 am

GEG

CVG

10h 28m2 stops

6:45 am - 12:37 pm

CVG

GEG

8h 52m1 stop

$262Delta

Mon, Jan 26 - Thu, Jan 29

7:50 pm - 11:40 am

BOI

TYS

13h 50m2 stops

2:55 pm - 12:25 am

TYS

BOI

11h 30m2 stops

$429Southwest

Thu, May 14 - Tue, May 19

7:50 pm - 12:00 pm

BOI

TYS

14h 10m2 stops

5:15 pm - 10:35 pm

TYS

BOI

7h 20m1 stop

$482Southwest

Mon, Jun 1 - Sat, Aug 1

American Airlines flights from Idaho to Kentucky

Our best American Airlines deals on Idaho to Kentucky flight tickets

American Airlines

Jan 5

GEG6:30 amSpokane

7h 13m

1 stop

CVG4:43 pmCincinnati Cinci./N. Kentucky

Jan 9

CVG1:33 pmCincinnati Cinci./N. Kentucky

8h 16m

1 stop

GEG6:49 pmSpokane

$257

Find similar

American Airlines

Jan 8

GEG6:33 amSpokane

11h 34m

2 stops

BNA8:07 pmNashville Intl

Jan 11

BNA3:34 pmNashville Intl

9h 37m

2 stops

GEG11:11 pmSpokane

$291

Find similar

American Airlines

Jan 16

BOI1:58 pmBoise Air Term. Gowen Fld

8h 16m

1 stop

BNA11:14 pmNashville Intl

Jan 19

BNA5:15 amNashville Intl

8h 53m

1 stop

BOI1:08 pmBoise Air Term. Gowen Fld

$313

Find similar

Alaska Airlines flights from Idaho to Kentucky

Our best Alaska Airlines deals on Idaho to Kentucky flight tickets

Alaska Airlines

Jan 6

GEG7:42 pmSpokane

7h 58m

1 stop

BNA5:40 amNashville Intl

Jan 8

BNA7:00 amNashville Intl

7h 44m

1 stop

GEG12:44 pmSpokane

$236

Find similar

Alaska Airlines

Jan 5

BOI4:16 pmBoise Air Term. Gowen Fld

23h 27m

1 stop

BNA4:43 pmNashville Intl

Jan 6

BNA5:43 pmNashville Intl

7h 14m

1 stop

BOI11:57 pmBoise Air Term. Gowen Fld

$244

Find similar

Alaska Airlines

Jan 14

BOI6:23 amBoise Air Term. Gowen Fld

11h 26m

1 stop

CVG7:49 pmCincinnati Cinci./N. Kentucky

Jan 21

CVG8:00 amCincinnati Cinci./N. Kentucky

17h 59m

1 stop

BOI11:59 pmBoise Air Term. Gowen Fld

$245

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseNashville

BOI - BNA

BOIBNA

Boise Air Term. Gowen Fld

Tue 1/6

12:19 pm-9:42 pm

1 stop8h 23m

Nashville Intl

Sat 1/10

8:22 am-1:35 pm

1 stop6h 13m

$217

BoiseNashville

BOI - BNA

BOIBNA

Boise Air Term. Gowen Fld

Tue 1/6

6:10 am-1:32 pm

1 stop6h 22m

Nashville Intl

Mon 1/12

10:43 am-9:23 pm

2 stops11h 40m

$222

SpokaneNashville

GEG - BNA

GEGBNA

Spokane

Tue 1/6

7:42 pm-5:40 am

1 stop7h 58m

Nashville Intl

Thu 1/8

7:00 am-12:44 pm

1 stop7h 44m

$236

SpokaneNashville

GEG - BNA

GEGBNA

Spokane

Tue 1/6

11:25 am-9:28 pm

1 stop8h 03m

Nashville Intl

Wed 1/7

7:35 am-3:00 pm

1 stop9h 25m

$237

SpokaneNashville

GEG - BNA

GEGBNA

Spokane

Thu 1/8

6:33 am-6:38 pm

2 stops10h 05m

Nashville Intl

Sun 1/11

5:00 pm-11:11 pm

1 stop8h 11m

$242

BoiseNashville

BOI - BNA

BOIBNA

Boise Air Term. Gowen Fld

Mon 1/5

4:16 pm-4:43 pm

1 stop23h 27m

Nashville Intl

Tue 1/6

5:43 pm-11:57 pm

1 stop7h 14m

$244

SpokaneNashville

GEG - BNA

GEGBNA

Spokane

Thu 1/8

6:33 am-8:07 pm

2 stops11h 34m

Nashville Intl

Sun 1/11

3:34 pm-11:11 pm

2 stops9h 37m

$247

SpokaneCincinnati

GEG - CVG

GEGCVG

Spokane

Mon 1/26

7:25 pm-8:53 am

2 stops10h 28m

Cincinnati Cinci./N. Kentucky

Thu 1/29

6:45 am-12:37 pm

1 stop8h 52m

$262

BoiseKnoxville

BOI - TYS

BOITYS

Boise Air Term. Gowen Fld

Thu 5/14

7:50 pm-11:40 am

2 stops13h 50m

Knoxville McGhee Tyson

Tue 5/19

2:55 pm-12:25 am

2 stops11h 30m

$429

BoiseKnoxville

BOI - TYS

BOITYS

Boise Air Term. Gowen Fld

Mon 6/1

7:50 pm-12:00 pm

2 stops14h 10m

Knoxville McGhee Tyson

Sat 8/1

5:15 pm-10:35 pm

1 stop7h 20m

$482

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to Kentucky

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

Prices

Airlines

Other information

What is the cheapest month to fly to Kentucky?

If you’re not able to fly to Kentucky in August, then February is your next best option. Flight prices from Idaho to Kentucky during February average around $378.

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

Our data shows that Wednesday is the least expensive day to fly to Kentucky. Tickets to fly out on this day can be as low as $427. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $613. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kentucky.

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

According to our data, the cheapest time of day to fly to Kentucky is in the evening. momondo users have found flights departing from Idaho to Kentucky in the evening for as low as $386. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Kentucky is in the morning when prices are around $521.

Can stopping save me money on Idaho to Kentucky flights?

You could potentially save up to 22% on your flight if you consider stops on a Idaho to Kentucky flight.

Cheap Idaho to Kentucky flight deals and tips

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

Fastest flight time	5h 21m
Direct flights	None

The fastest flight from Idaho to Kentucky takes 5h 21m

There are no direct flights from Idaho to Kentucky. There are no popular flight routes from Idaho to Kentucky.

Search flight deals

When did momondo last update prices for flights from Idaho to Kentucky?
Prices for flights from Idaho to Kentucky refresh daily.
How many operators does momondo search for flights from Idaho to Kentucky?
The number of operators available for flights from Idaho to Kentucky is 6 as of December 2025.
How old do you have to be to fly from Idaho to Kentucky?
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 to Kentucky.
What documentation or ID do you need to fly to Kentucky?
The required travel and health documents for your Kentucky trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kentucky. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to Kentucky

Compare and see reviews for airlines that fly from Idaho to Kentucky with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $234	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
American Airlines	PriceFrom $268	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
United Airlines	PriceFrom $268	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
Southwest	PriceFrom $363	Free Cancellation	Rating 7.9 4,250 reviews	Search Southwest flights

Why use momondo?

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

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 to Kentucky for you.

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

momondo does allow users to show only those flights to Kentucky from Idaho which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Idaho to Kentucky?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kentucky from Idaho.

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

Price alerts on flights to Kentucky from Idaho are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.