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

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

How many flights depart from Kentucky to Idaho on average per week?

2 flights are operational weekly from Kentucky to Idaho as of April 2026. The most popular departure day for this route is Tue, with 50% of flights per week taking off on this day.

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 57m on average. Another popular route from Kentucky to Idaho is flying from Lexington to Boise, which will take roughly 7h 54m. Keep in mind that layovers or delays could extend your travel time.

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 35% 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.

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 April 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.

$106 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.

7:08 pm - 12:27 pm

BNA

BOI

18h 19m

1 stop

1:22 pm - 6:22 pm

BOI

BNA

28h 00m

1 stop

$216Frontier

Sat, May 16 - Tue, May 19

2:50 pm - 11:18 pm

BNA

GEG

10h 28m

1 stop

10:48 pm - 7:42 am

GEG

BNA

6h 54m

1 stop

$263Delta

Thu, Jun 4 - Mon, Jun 8

6:15 am - 10:15 am

BNA

GEG

6h 00m

1 stop

7:00 am - 10:15 pm

GEG

BNA

13h 15m

2 stops

$274Southwest

Wed, Apr 29 - Wed, May 6

5:45 am - 1:05 pm

BNA

GEG

9h 20m

2 stops

7:00 am - 10:15 pm

GEG

BNA

13h 15m

2 stops

$279Southwest

Wed, Apr 29 - Wed, May 6

7:00 am - 11:58 am

BNA

GEG

6h 58m

1 stop

12:45 pm - 10:27 pm

GEG

BNA

7h 42m

1 stop

$299American Airlines

Wed, Aug 26 - Mon, Aug 31

7:00 am - 12:01 pm

BNA

GEG

7h 01m

1 stop

12:51 pm - 10:07 pm

GEG

BNA

7h 16m

1 stop

$311American Airlines

Tue, Jun 9 - Tue, Jun 16

9:00 am - 3:18 pm

CVG

GEG

9h 18m

1 stop

5:00 am - 2:30 pm

GEG

CVG

6h 30m

1 stop

$317United Airlines

Sat, May 2 - Tue, May 5

7:00 am - 3:18 pm

CVG

GEG

11h 18m

2 stops

5:00 am - 2:30 pm

GEG

CVG

6h 30m

1 stop

$322United Airlines

Sat, May 2 - Tue, May 5

4:45 pm - 11:59 pm

BNA

BOI

8h 14m

1 stop

2:57 pm - 11:59 pm

BOI

BNA

8h 02m

1 stop

$339Alaska Airlines

Sat, May 2 - Tue, May 5

6:58 pm - 11:11 pm

CVG

GEG

7h 13m

1 stop

6:00 am - 5:58 pm

GEG

CVG

8h 58m

1 stop

$358Alaska Airlines

Tue, Apr 28 - Sat, May 2

Delta flights from Kentucky to Idaho

Our best Delta deals on Kentucky to Idaho flight tickets

Delta

Jun 4

BNA7:27 pmNashville Intl

6h 08m

1 stop

GEG11:35 pmSpokane

Jun 9

GEG10:48 pmSpokane

7h 55m

1 stop

BNA8:43 amNashville Intl

$263

Delta

May 1

BNA4:58 pmNashville Intl

9h 22m

1 stop

GEG12:20 amSpokane

May 5

GEG10:40 pmSpokane

8h 12m

1 stop

BNA8:52 amNashville Intl

$295

Delta

May 7

BNA6:00 amNashville Intl

8h 18m

1 stop

BOI1:18 pmBoise Air Term. Gowen Fld

May 11

BOI11:39 pmBoise Air Term. Gowen Fld

7h 56m

1 stop

BNA8:35 amNashville Intl

$309

United Airlines flights from Kentucky to Idaho

Our best United Airlines deals on Kentucky to Idaho flight tickets

United Airlines

May 2

CVG9:00 amCincinnati Cinci./N. Kentucky

9h 18m

1 stop

GEG3:18 pmSpokane

May 5

GEG5:00 amSpokane

6h 30m

1 stop

CVG2:30 pmCincinnati Cinci./N. Kentucky

$317

United Airlines

May 2

CVG7:00 amCincinnati Cinci./N. Kentucky

11h 18m

2 stops

GEG3:18 pmSpokane

May 5

GEG5:00 amSpokane

6h 30m

1 stop

CVG2:30 pmCincinnati Cinci./N. Kentucky

$322

United Airlines

Apr 25

BNA8:00 amNashville Intl

9h 48m

1 stop

BOI4:48 pmBoise Air Term. Gowen Fld

May 2

BOI2:33 pmBoise Air Term. Gowen Fld

6h 24m

1 stop

BNA9:57 pmNashville Intl

$355

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

NashvilleBoise

BNA - BOI

BNABOI

Nashville Intl

Sat 5/16

7:08 pm-12:27 pm

1 stop18h 19m

Boise Air Term. Gowen Fld

Tue 5/19

1:22 pm-6:22 pm

1 stop28h 00m

$216

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Thu 6/4

2:50 pm-11:18 pm

1 stop10h 28m

Spokane

Mon 6/8

10:48 pm-7:42 am

1 stop6h 54m

$263

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Wed 4/29

6:15 am-10:15 am

1 stop6h 00m

Spokane

Wed 5/6

7:00 am-10:15 pm

2 stops13h 15m

$274

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Wed 4/29

5:45 am-1:05 pm

2 stops9h 20m

Spokane

Wed 5/6

7:00 am-10:15 pm

2 stops13h 15m

$279

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Wed 8/26

7:00 am-11:58 am

1 stop6h 58m

Spokane

Mon 8/31

12:45 pm-10:27 pm

1 stop7h 42m

$299

Quickest round-trip

NashvilleSpokane

BNA - GEG

BNAGEG

Nashville Intl

Tue 6/9

7:00 am-12:01 pm

1 stop7h 01m

Spokane

Tue 6/16

12:51 pm-10:07 pm

1 stop7h 16m

$311

CincinnatiSpokane

CVG - GEG

CVGGEG

Cincinnati Cinci./N. Kentucky

Sat 5/2

9:00 am-3:18 pm

1 stop9h 18m

Spokane

Tue 5/5

5:00 am-2:30 pm

1 stop6h 30m

$317

CincinnatiSpokane

CVG - GEG

CVGGEG

Cincinnati Cinci./N. Kentucky

Sat 5/2

7:00 am-3:18 pm

2 stops11h 18m

Spokane

Tue 5/5

5:00 am-2:30 pm

1 stop6h 30m

$322

NashvilleBoise

BNA - BOI

BNABOI

Nashville Intl

Sat 5/2

4:45 pm-11:59 pm

1 stop8h 14m

Boise Air Term. Gowen Fld

Tue 5/5

2:57 pm-11:59 pm

1 stop8h 02m

$339

CincinnatiSpokane

CVG - GEG

CVGGEG

Cincinnati Cinci./N. Kentucky

Tue 4/28

6:58 pm-11:11 pm

1 stop7h 13m

Spokane

Sat 5/2

6:00 am-5:58 pm

1 stop8h 58m

$358

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, September 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 $311. If you don’t want to visit Idaho in September, then you should wait until August to fly from Kentucky, when ticket prices are also cheap, with an average price of $332.

Can stopping save me money on Kentucky to Idaho flights?

You could potentially save up to 25% 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 April 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 8,368 reviews	Search Delta flights
American Airlines	PriceFrom $287	Free Cancellation	Rating 7.1 11,544 reviews	Search American Airlines flights
United Airlines	PriceFrom $327	Free Cancellation	Rating 7.4 9,529 reviews	Search United Airlines flights
Southwest	PriceFrom $346	Free Cancellation	Rating 8.0 4,335 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.