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

Southwest, Delta, and United Airlines are the most popular carriers operating from Kentucky to Idaho

What airlines fly to Idaho?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Idaho from Kentucky according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 4 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

How long is the flight from Kentucky to Idaho?

Flight times from Kentucky to Idaho vary, but if you’re flying out of Louisville and flying into Boise (one of the most popular routes), then the duration is 5h 30m on average. Another popular route from Kentucky to Idaho is flying from Lexington to Boise, which will take roughly 7h 42m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from Kentucky to Idaho are refreshed on a daily basis.

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

As of May 2026, there are 6 operators available to choose from for flights from Kentucky to Idaho.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Kentucky to Idaho.

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

The required travel and health documents for your Idaho 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 Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$115 Cheap Flights from Kentucky to Idaho in 2026

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Find the cheapest flights from Kentucky to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:32 pm - 12:30 pm

TYS

BOI

17h 58m

1 stop

1:25 pm - 7:37 pm

BOI

TYS

28h 12m

1 stop

$241Frontier

Mon, Jun 1 - Tue, Jun 9

8:32 pm - 12:30 pm

TYS

BOI

17h 58m

1 stop

1:25 pm - 7:37 pm

BOI

TYS

28h 12m

1 stop

$256Frontier

Mon, Jun 8 - Sun, Jun 14

4:20 pm - 11:06 pm

BNA

GEG

8h 46m

1 stop

1:30 pm - 11:07 pm

GEG

BNA

7h 37m

1 stop

$263Delta

Thu, Jun 4 - Tue, Jun 9

5:10 am - 11:36 am

BNA

GEG

8h 26m

1 stop

10:48 pm - 8:41 am

GEG

BNA

7h 53m

1 stop

$268Delta

Sat, Jul 4 - Tue, Jul 7

3:25 pm - 11:25 pm

BNA

GEG

10h 00m

2 stops

5:25 am - 8:40 pm

GEG

BNA

13h 15m

1 stop

$274Southwest

Fri, Jul 3 - Thu, Jul 9

5:45 pm - 12:05 am

BNA

GEG

8h 20m

2 stops

5:25 am - 8:40 pm

GEG

BNA

13h 15m

1 stop

$294Southwest

Tue, Jul 21 - Mon, Aug 3

6:00 am - 11:20 am

BNA

BOI

6h 20m

1 stop

3:53 pm - 11:29 pm

BOI

BNA

6h 36m

1 stop

$310American Airlines

Mon, Jul 20 - Sat, Jul 25

8:00 am - 4:49 pm

BNA

BOI

9h 49m

2 stops

3:53 pm - 11:29 pm

BOI

BNA

6h 36m

1 stop

$311American Airlines

Tue, Jul 14 - Tue, Jul 21

10:12 am - 3:12 pm

BNA

JAC

6h 00m

1 stop

7:00 am - 6:10 pm

JAC

BNA

10h 10m

2 stops

$336United Airlines

Wed, Nov 4 - Wed, Nov 11

2:26 pm - 9:02 pm

BNA

JAC

7h 36m

1 stop

4:25 pm - 11:59 pm

JAC

BNA

6h 34m

1 stop

$364United Airlines

Thu, Oct 15 - Mon, Oct 19

American Airlines flights from Kentucky to Idaho

Our best American Airlines deals on Kentucky to Idaho flight tickets

American Airlines

Jul 20

BNA6:00 amNashville Intl

6h 20m

1 stop

BOI11:20 amBoise Air Term. Gowen Fld

Jul 25

BOI3:53 pmBoise Air Term. Gowen Fld

6h 36m

1 stop

BNA11:29 pmNashville Intl

$310

American Airlines

Jul 14

BNA8:00 amNashville Intl

9h 49m

2 stops

BOI4:49 pmBoise Air Term. Gowen Fld

Jul 21

BOI3:53 pmBoise Air Term. Gowen Fld

6h 36m

1 stop

BNA11:29 pmNashville Intl

$311

American Airlines

Jun 9

BNA5:01 amNashville Intl

6h 27m

1 stop

BOI10:28 amBoise Air Term. Gowen Fld

Jun 16

BOI4:06 pmBoise Air Term. Gowen Fld

6h 19m

1 stop

BNA11:25 pmNashville Intl

$312

Delta flights from Kentucky to Idaho

Our best Delta deals on Kentucky to Idaho flight tickets

Delta

Jun 4

BNA4:20 pmNashville Intl

8h 46m

1 stop

GEG11:06 pmSpokane

Jun 9

GEG1:30 pmSpokane

7h 37m

1 stop

BNA11:07 pmNashville Intl

$263

Delta

Jul 4

BNA5:10 amNashville Intl

8h 26m

1 stop

GEG11:36 amSpokane

Jul 7

GEG10:48 pmSpokane

7h 53m

1 stop

BNA8:41 amNashville Intl

$268

Delta

Jun 4

BNA2:50 pmNashville Intl

10h 28m

1 stop

GEG11:18 pmSpokane

Jun 9

GEG12:35 pmSpokane

7h 54m

1 stop

BNA10:29 pmNashville Intl

$273

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-12:30 pm

1 stop17h 58m

Boise Air Term. Gowen Fld

Tue 6/9

1:25 pm-7:37 pm

1 stop28h 12m

$241

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Mon 6/8

8:32 pm-12:30 pm

1 stop17h 58m

Boise Air Term. Gowen Fld

Sun 6/14

1:25 pm-7:37 pm

1 stop28h 12m

$256

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Thu 6/4

4:20 pm-11:06 pm

1 stop8h 46m

Spokane

Tue 6/9

1:30 pm-11:07 pm

1 stop7h 37m

$263

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Sat 7/4

5:10 am-11:36 am

1 stop8h 26m

Spokane

Tue 7/7

10:48 pm-8:41 am

1 stop7h 53m

$268

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Fri 7/3

3:25 pm-11:25 pm

2 stops10h 00m

Spokane

Thu 7/9

5:25 am-8:40 pm

1 stop13h 15m

$274

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Tue 7/21

5:45 pm-12:05 am

2 stops8h 20m

Spokane

Mon 8/3

5:25 am-8:40 pm

1 stop13h 15m

$294

Quickest round-trip

NashvilleBoise

BNA - BOI

BNABOI

Nashville Intl

Mon 7/20

6:00 am-11:20 am

1 stop6h 20m

Boise Air Term. Gowen Fld

Sat 7/25

3:53 pm-11:29 pm

1 stop6h 36m

$310

NashvilleBoise

BNA - BOI

BNABOI

Nashville Intl

Tue 7/14

8:00 am-4:49 pm

2 stops9h 49m

Boise Air Term. Gowen Fld

Tue 7/21

3:53 pm-11:29 pm

1 stop6h 36m

$311

NashvilleJackson

BNA - JAC

BNAJAC

Nashville Intl

Wed 11/4

10:12 am-3:12 pm

1 stop6h 00m

Jackson Hole

Wed 11/11

7:00 am-6:10 pm

2 stops10h 10m

$336

NashvilleJackson

BNA - JAC

BNAJAC

Nashville Intl

Thu 10/15

2:26 pm-9:02 pm

1 stop7h 36m

Jackson Hole

Mon 10/19

4:25 pm-11:59 pm

1 stop6h 34m

$364

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 Kentucky to Idaho

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 Idaho?

In general, August is the cheapest month to fly from Kentucky to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $196. If you don’t want to visit Idaho in August, then you should wait until May to fly from Kentucky, when ticket prices are also cheap, with an average price of $215.

Can stopping save me money on Kentucky to Idaho flights?

You could potentially save up to 23% on your flight if you consider stops on a Kentucky to Idaho flight.

Cheap Kentucky to Idaho flight deals and tips

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

Fastest flight time	5h 16m
Direct flights	None

The fastest flight from Kentucky to Idaho takes 5h 16m

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

Search flight deals

Frequently asked questions about flying from Kentucky to Idaho

When did momondo last update prices for flights from Kentucky to Idaho?
Prices for flights from Kentucky to Idaho are refreshed on a daily basis.
How many operators does momondo search for flights from Kentucky to Idaho?
As of May 2026, there are 6 operators available to choose from for flights from Kentucky to Idaho.
How old do you have to be to fly from Kentucky to Idaho?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Kentucky to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho 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 Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Kentucky to Idaho

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $196	Free Cancellation	Rating 7.9 8,450 reviews	Search Delta flights
American Airlines	PriceFrom $287	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
United Airlines	PriceFrom $327	Free Cancellation	Rating 7.4 9,706 reviews	Search United Airlines flights
Southwest	PriceFrom $351	Free Cancellation	Rating 7.9 4,296 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to Idaho from Kentucky is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho quick and easy, saving you time and money.

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

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

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

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 Idaho from Kentucky.

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

Yes momondo offers price alerts on flights to Idaho from Kentucky. 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.