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$133+ Cheap flights from Idaho to Louisville (SDF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SDF
Oct 13 — Oct 201
Mon 10/13
Mon 10/20
1 adult, Economy
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Cheap flight deals from Idaho to Louisville

Keep the following information in mind while searching for Idaho to Louisville flight deals. Data was last updated September 13, 2025.

Round-trip from

$224
(Southwest)

One-way from

$133
(American Airlines)

Popular in

March

Cheapest in

August

Average price

$466
From Idaho to Louisville Intl
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One-way flight from Idaho to Louisville Intl
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Highest demand for flights based on searches. 17% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Idaho to Louisville

Cheapest flights from Idaho to Louisville
Explore the most affordable flight options available from Idaho to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2025.

This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:05 pmGEG - SDF
1 stop6h 03mDelta
Mon 12/86:35 amSDF - GEG
1 stop9h 33mDelta
Deal found 9/12$265
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:39 pmBOI - SDF
2 stops12h 41mDelta
Wed 10/297:00 amSDF - BOI
1 stop9h 02mDelta
Deal found 9/11$274
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1812:35 pmBOI - SDF
1 stop5h 58mUnited Airlines
Fri 10/317:00 amSDF - BOI
1 stop6h 39mUnited Airlines
Deal found 9/12$293
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:45 pmIDA - SDF
1 stop5h 52mUnited Airlines
Tue 12/169:00 amSDF - IDA
1 stop8h 24mUnited Airlines
Deal found 9/11$324
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:25 amGEG - SDF
2 stops9h 40mSouthwest
Mon 12/86:05 amSDF - GEG
1 stop6h 30mSouthwest
Deal found 9/12$327
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/82:39 pmBOI - SDF
1 stop5h 51mUnited Airlines
Wed 10/157:00 amSDF - BOI
1 stop6h 39mUnited Airlines
Deal found 9/11$329
This American Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:33 pmBOI - SDF
1 stop6h 52mAmerican Airlines
Sun 11/25:00 amSDF - BOI
1 stop9h 06mAmerican Airlines
Deal found 9/12$346
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/272:16 pmBOI - SDF
1 stop23h 04mSpirit Airlines
Wed 10/110:14 amSDF - BOI
2 stops29h 07mSpirit Airlines
Deal found 9/12$355
This Southwest deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:20 amBOI - SDF
2 stops9h 10mSouthwest
Wed 10/156:00 amSDF - BOI
1 stop6h 45mSouthwest
Deal found 9/11$362
This American Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:58 pmIDA - SDF
1 stop6h 00mAmerican Airlines
Tue 12/167:13 amSDF - IDA
1 stop8h 14mAmerican Airlines
Deal found 9/11$364
This American Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:35 pmBOI - SDF
1 stop6h 50mAmerican Airlines
Wed 10/296:45 amSDF - BOI
1 stop8h 01mAmerican Airlines
Deal found 9/11$381
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2411:15 pmGEG - SDF
2 stops12h 05mDelta
Sun 10/266:00 amSDF - GEG
1 stop8h 41mDelta
Deal found 9/12$382

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Louisville 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, Cheapflights users made 2,558,603 searches. Data last updated September 13, 2025.
Use the filters below to find and compare flights from Idaho to Louisville that are best for you.

Fly from

Idaho

Fly to

Louisville

Route

Depart

Return

Price

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Wed 1/28

11:50 am-10:10 pm

2 stops8h 20m

Louisville Intl

Sat 1/31

4:45 pm-9:15 pm

1 stop6h 30m

$230

SpokaneLouisville

GEG - SDF

GEGSDF

Spokane

Tue 3/3

2:05 pm-10:55 pm

1 stop5h 50m

Louisville Intl

Wed 3/4

6:36 am-1:14 pm

1 stop9h 38m

$243

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Wed 1/28

11:45 am-9:45 pm

2 stops8h 00m

Louisville Intl

Sat 1/31

10:10 am-9:02 pm

2 stops12h 52m

$248

SpokaneLouisville

GEG - SDF

GEGSDF

Spokane

Thu 12/4

2:05 pm-11:08 pm

1 stop6h 03m

Louisville Intl

Mon 12/8

6:35 am-1:08 pm

1 stop9h 33m

$265

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Sat 10/18

12:35 pm-8:33 pm

1 stop5h 58m

Louisville Intl

Fri 10/31

7:00 am-11:39 am

1 stop6h 39m

$293

JacksonLouisville

JAC - SDF

JACSDF

Jackson Hole

Thu 3/12

2:30 pm-9:57 pm

1 stop5h 27m

Louisville Intl

Sun 3/15

3:20 pm-9:02 pm

1 stop7h 42m

$304

Idaho FallsLouisville

IDA - SDF

IDASDF

Idaho Falls Fanning Field

Fri 12/5

2:45 pm-10:37 pm

1 stop5h 52m

Louisville Intl

Tue 12/16

9:00 am-3:24 pm

1 stop8h 24m

$324

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Wed 10/8

2:39 pm-10:30 pm

1 stop5h 51m

Louisville Intl

Wed 10/15

7:00 am-11:39 am

1 stop6h 39m

$329

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Fri 10/31

1:33 pm-10:25 pm

1 stop6h 52m

Louisville Intl

Sun 11/2

5:00 am-12:06 pm

1 stop9h 06m

$346

BoiseLouisville

BOI - SDF

BOISDF

Boise Air Term. Gowen Fld

Sat 9/27

2:16 pm-3:20 pm

1 stop23h 04m

Louisville Intl

Wed 10/1

10:14 am-1:21 pm

2 stops29h 07m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 41 results
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Best time to book a flight from Idaho to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Louisville

What is the cheapest month to book a flight from Idaho to Louisville?

Currently, January is the cheapest month in which you can book a flight from Idaho to Louisville (average of $299). Flying from Idaho to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SDF?

Find hourly flight availability from Idaho to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 13, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Louisville as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Louisville from Idaho?

    Louisville Intl (SDF), located 5.3 mi from the city center, is the airport you fly into when you book flights from Idaho to Louisville.

  • How long is the flight from Idaho to Louisville?

    For as low as $243, Southwest can have you in Louisville from Idaho in 5h 50m. The distance between Idaho and Louisville is about 1720 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Idaho to Louisville one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $133. Users have also found prices from $138 and $138 on United Airlines and Southwest, respectively.

  • What are the most popular routes from Idaho to Louisville?

    Most travelers choose Boise Air Term. Gowen Fld - Louisville Intl, Spokane - Louisville Intl or Idaho Falls Fanning Field - Louisville Intl when deciding on the best route from Idaho to Louisville.

  • Can I find deals for flights from Idaho to Louisville that include hotel bookings?

    Yes. In addition to deals on Idaho to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Louisville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Louisville.

  • Can I find deals for business class flights from Idaho to Louisville?

    Yes. Cheapflights offers flight deals from Idaho to Louisville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Louisville?

    Currently, January is the cheapest month in which you can book a flight from Idaho to Louisville (average of $299). Flying from Idaho to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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Alternative routes for Idaho to Louisville

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Top 4 airlines flying from Idaho to Louisville

Discover the top 4 airlines that operate flights from Idaho to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$433FlexibilityNo cancel feeOn-time71%
DeltaCheapest$305Average$423FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$348Average$446FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$386Average$588FlexibilityNo cancel feeOn-time69%

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