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

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

3 flights are operational weekly from Kentucky to Idaho as of October 2026. The most popular departure day for this route is Mon, with 33% 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 6h 10m on average. Another popular route from Kentucky to Idaho is flying from Lexington to Boise, which will take roughly 6h 38m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Idaho?

United Airlines, Delta and American Airlines 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 38% 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 October 2026, there are 4 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.

$182 Cheap Flights from Kentucky to Idaho in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

4:10 pm - 10:46 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

8h 36m1 stop Dallas/Fort Worth

1:39 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

5h 58m1 stop Chicago O'Hare Intl

$362American Airlines

Tue, Dec 8 - Tue, Dec 15

6:00 am - 11:28 amSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

7h 28m1 stop Dallas/Fort Worth

2:42 pm - 12:15 amBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

7h 33m1 stop Dallas/Fort Worth

$363American Airlines

Mon, Nov 23 - Tue, Dec 1

3:24 pm - 9:34 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

8h 10m1 stop Denver Intl

6:30 am - 2:22 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

5h 52m1 stop Denver Intl

$363United Airlines

Sat, Nov 7 - Mon, Nov 9

3:00 pm - 9:59 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

8h 59m1 stop Atlanta Hartsfield-Jackson

3:00 pm - 11:02 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

6h 02m1 stop Minneapolis St Paul

$363Delta

Mon, Nov 23 - Wed, Dec 2

6:50 am - 12:42 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

7h 52m1 stop Minneapolis St Paul

3:00 pm - 11:02 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

6h 02m1 stop Minneapolis St Paul

$363Delta

Wed, Dec 2 - Thu, Dec 10

4:15 pm - 11:15 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

9h 00m1 stop Las Vegas Harry Reid Intl

1:05 pm - 10:50 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

7h 45m1 stop Denver Intl

$363Southwest

Wed, Dec 2 - Wed, Dec 9

9:17 am - 6:03 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

10h 46m2 stops Chicago O'Hare Intl Denver Intl

6:30 am - 2:22 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

5h 52m1 stop Denver Intl

$368United Airlines

Sat, Nov 7 - Mon, Nov 9

3:50 pm - 10:35 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

8h 45m2 stops Nashville Intl Denver Intl

3:30 pm - 10:50 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

5h 20m1 stop Denver Intl

$368Southwest

Wed, Dec 2 - Wed, Dec 9

11:48 am - 10:25 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

12h 37m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

5:46 am - 5:40 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

9h 54m2 stops Portland Chicago O'Hare Intl

$721Alaska Airlines

Fri, Dec 25 - Tue, Jan 5

11:48 am - 10:25 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

12h 37m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

8:12 am - 11:12 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

13h 00m2 stops Seattle/Tacoma Intl Dallas/Fort Worth

$721Alaska Airlines

Fri, Dec 25 - Wed, Jan 6

Cheap last minute flights

Enter your travel dates to find the best prices.

6:11 am - 11:24 amLEX Lexington Blue Grass-BOI Boise Air Term. Gowen Fld

7h 13m1 stop Dallas/Fort Worth

3:24 pm - 12:09 amBOI Boise Air Term. Gowen Fld-LEX Lexington Blue Grass

6h 45m1 stop Chicago O'Hare Intl

$539American Airlines

Thu, Oct 8 - Sun, Oct 11

3:34 pm - 9:57 pmLEX Lexington Blue Grass-BOI Boise Air Term. Gowen Fld

8h 23m1 stop Atlanta Hartsfield-Jackson

1:40 pm - 11:58 pmBOI Boise Air Term. Gowen Fld-LEX Lexington Blue Grass

8h 18m1 stop Atlanta Hartsfield-Jackson

$539Delta

Thu, Oct 8 - Sun, Oct 11

7:45 am - 6:33 pmLEX Lexington Blue Grass-BOI Boise Air Term. Gowen Fld

12h 48m2 stops Detroit Metropolitan Wayne County Seattle/Tacoma Intl

11:10 pm - 9:25 amBOI Boise Air Term. Gowen Fld-LEX Lexington Blue Grass

8h 15m1 stop Atlanta Hartsfield-Jackson

$544Delta

Thu, Oct 8 - Sun, Oct 11

5:29 am - 1:22 pmLEX Lexington Blue Grass-BOI Boise Air Term. Gowen Fld

9h 53m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

3:24 pm - 12:09 amBOI Boise Air Term. Gowen Fld-LEX Lexington Blue Grass

6h 45m1 stop Chicago O'Hare Intl

$544American Airlines

Thu, Oct 8 - Sun, Oct 11

7:00 am - 11:28 amSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

6h 28m1 stop Chicago O'Hare Intl

5:00 am - 2:40 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

7h 40m1 stop Denver Intl

$601United Airlines

Wed, Oct 7 - Sat, Oct 10

7:00 am - 1:38 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

8h 38m2 stops Chicago O'Hare Intl Denver Intl

5:00 am - 2:40 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

7h 40m1 stop Denver Intl

$606United Airlines

Wed, Oct 7 - Sat, Oct 10

7:10 pm - 11:55 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

6h 45m1 stop Phoenix Sky Harbor Intl

6:00 am - 6:30 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

10h 30m2 stops Las Vegas Harry Reid Intl Chicago Midway

$606Southwest

Wed, Oct 7 - Sat, Oct 10

10:40 am - 6:25 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

9h 45m2 stops Denver Intl Phoenix Sky Harbor Intl

6:00 am - 6:30 pmBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

10h 30m2 stops Las Vegas Harry Reid Intl Houston Hobby

$611Southwest

Wed, Oct 7 - Sat, Oct 10

6:00 am - 6:17 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

14h 17m2 stops Dallas/Fort Worth Seattle/Tacoma Intl

8:22 pm - 9:32 amBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

11h 10m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

$1,000Alaska Airlines

Sun, Oct 4 - Tue, Oct 6

6:00 am - 6:17 pmSDF Louisville Intl-BOI Boise Air Term. Gowen Fld

14h 17m2 stops Dallas/Fort Worth Seattle/Tacoma Intl

8:22 pm - 9:32 amBOI Boise Air Term. Gowen Fld-SDF Louisville Intl

11h 10m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

$1,047Alaska Airlines

Sun, Oct 4 - Mon, Oct 5

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American Airlines flights from Kentucky to Idaho

Our best American Airlines deals on Kentucky to Idaho flight tickets

American Airlines

Dec 8

SDF4:10 pmLouisville Intl

8h 36m

1 stop

BOI10:46 pmBoise Air Term. Gowen Fld

Dec 15

BOI1:39 pmBoise Air Term. Gowen Fld

5h 58m

1 stop

SDF9:37 pmLouisville Intl

$362

American Airlines

Nov 6

LEX3:54 pmLexington Blue Grass

7h 49m

1 stop

IDA9:43 pmIdaho Falls Fanning Field

Nov 9

IDA8:00 amIdaho Falls Fanning Field

9h 16m

1 stop

LEX7:16 pmLexington Blue Grass

$416

American Airlines

Nov 1

SDF8:22 amLouisville Intl

7h 29m

1 stop

BOI1:51 pmBoise Air Term. Gowen Fld

Nov 3

BOI6:06 amBoise Air Term. Gowen Fld

9h 07m

2 stops

SDF5:13 pmLouisville Intl

$420

Delta flights from Kentucky to Idaho

Our best Delta deals on Kentucky to Idaho flight tickets

Delta

Nov 23

SDF3:00 pmLouisville Intl

8h 59m

1 stop

BOI9:59 pmBoise Air Term. Gowen Fld

Dec 2

BOI3:00 pmBoise Air Term. Gowen Fld

6h 02m

1 stop

SDF11:02 pmLouisville Intl

$363

Delta

Jan 13

SDF10:43 amLouisville Intl

9h 31m

2 stops

IDA6:14 pmIdaho Falls Fanning Field

Jan 19

IDA6:00 amIdaho Falls Fanning Field

9h 40m

2 stops

SDF5:40 pmLouisville Intl

$369

Delta

Dec 15

SDF6:50 amLouisville Intl

7h 52m

1 stop

BOI12:42 pmBoise Air Term. Gowen Fld

Dec 25

BOI3:21 pmBoise Air Term. Gowen Fld

6h 02m

1 stop

SDF11:23 pmLouisville Intl

$375

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Tue 12/8

4:10 pm-10:46 pm

1 stop8h 36m

Boise Air Term. Gowen Fld

Tue 12/15

1:39 pm-9:37 pm

1 stop5h 58m

$362

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Mon 11/23

6:00 am-11:28 am

1 stop7h 28m

Boise Air Term. Gowen Fld

Tue 12/1

2:42 pm-12:15 am

1 stop7h 33m

$363

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Sat 11/7

3:24 pm-9:34 pm

1 stop8h 10m

Boise Air Term. Gowen Fld

Mon 11/9

6:30 am-2:22 pm

1 stop5h 52m

$363

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Mon 11/23

3:00 pm-9:59 pm

1 stop8h 59m

Boise Air Term. Gowen Fld

Wed 12/2

3:00 pm-11:02 pm

1 stop6h 02m

$363

Quickest round-trip

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Wed 12/2

6:50 am-12:42 pm

1 stop7h 52m

Boise Air Term. Gowen Fld

Thu 12/10

3:00 pm-11:02 pm

1 stop6h 02m

$363

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Wed 12/2

4:15 pm-11:15 pm

1 stop9h 00m

Boise Air Term. Gowen Fld

Wed 12/9

1:05 pm-10:50 pm

1 stop7h 45m

$363

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Sat 11/7

9:17 am-6:03 pm

2 stops10h 46m

Boise Air Term. Gowen Fld

Mon 11/9

6:30 am-2:22 pm

1 stop5h 52m

$368

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Wed 12/2

3:50 pm-10:35 pm

2 stops8h 45m

Boise Air Term. Gowen Fld

Wed 12/9

3:30 pm-10:50 pm

1 stop5h 20m

$368

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Fri 12/25

11:48 am-10:25 pm

2 stops12h 37m

Boise Air Term. Gowen Fld

Tue 1/5

5:46 am-5:40 pm

2 stops9h 54m

$721

LouisvilleBoise

SDF Louisville Intl - BOI Boise Air Term. Gowen Fld

SDFBOI

Louisville Intl

Fri 12/25

11:48 am-10:25 pm

2 stops12h 37m

Boise Air Term. Gowen Fld

Wed 1/6

8:12 am-11:12 pm

2 stops13h 00m

$721

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, April 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 $386. If you don’t want to visit Idaho in April, then you should wait until February to fly from Kentucky, when ticket prices are also cheap, with an average price of $401.

Can stopping save me money on Kentucky to Idaho flights?

You could potentially save up to 37% 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

Best Price Found	$182
Fastest flight time	5h 30m
Direct flights	None

The best one-way flight to Idaho from Kentucky in the past 72 hours is $182. The best round-trip flight deal from Kentucky to Idaho found on momondo in the last 72 hours is $362.

The fastest flight from Kentucky to Idaho takes 5h 30m

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 October 2026, there are 4 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
United Airlines	PriceFrom $327	Free Cancellation	Rating 7.4 10,280 reviews	Search United Airlines flights
Delta	PriceFrom $331	Free Cancellation	Rating 7.8 8,631 reviews	Search Delta flights
Southwest	PriceFrom $376	Free Cancellation	Rating 7.9 4,215 reviews	Search Southwest flights
American Airlines	PriceFrom $401	Free Cancellation	Rating 7.0 12,124 reviews	Search American Airlines 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.