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Idaho

$105+ Cheap flights from Louisville (SDF) to Idaho

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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — BOI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Louisville to Idaho

Keep the following information in mind while searching for Louisville to Idaho flight deals. Data was last updated September 11, 2025.

Round-trip from

$243
(Delta)

One-way from

$105
(Southwest)

Popular in

November

Cheapest in

September

Average price

$316
From Louisville Intl to Idaho
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One-way flight from Louisville Intl to Idaho
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Highest demand for flights based on searches. 19% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 10% potential price decrease ($43 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 Louisville to Idaho

Cheapest flights from Louisville to Idaho
Explore the most affordable flight options available from Louisville to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

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.
Wed 10/226:00 amSDF - GEG
1 stop8h 41mDelta
Tue 10/282:17 pmGEG - SDF
1 stop5h 37mDelta
Deal found 9/11$243
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 10/227:09 amSDF - GEG
1 stop7h 32mDelta
Mon 10/2712:51 pmGEG - SDF
1 stop8h 10mDelta
Deal found 9/10$254
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 11/37:15 pmSDF - BOI
1 stop6h 39mDelta
Wed 11/121:49 pmBOI - SDF
1 stop8h 17mDelta
Deal found 9/10$254
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 11/187:39 amSDF - GEG
1 stop7h 53mAmerican Airlines
Sat 11/2211:59 pmGEG - SDF
1 stop7h 12mAmerican Airlines
Deal found 9/10$300
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.
Thu 10/237:09 amSDF - GEG
1 stop7h 32mDelta
Tue 10/282:17 pmGEG - SDF
1 stop5h 37mDelta
Deal found 9/11$311
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.
Tue 10/146:00 amSDF - GEG
2 stops10h 29mDelta
Thu 10/2312:51 pmGEG - SDF
1 stop8h 10mDelta
Deal found 9/11$316
This Delta deal was found by Cheapflights users on 9/9. 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.
Tue 9/307:44 pmSDF - BOI
1 stop6h 15mDelta
Tue 10/71:39 pmBOI - SDF
1 stop8h 22mDelta
Deal found 9/9$317
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.
Thu 10/237:09 amSDF - GEG
1 stop7h 32mDelta
Mon 10/2712:51 pmGEG - SDF
1 stop8h 10mDelta
Deal found 9/11$322
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 9/254:20 pmSDF - BOI
1 stop30h 11mSpirit Airlines
Sun 9/282:16 pmBOI - SDF
1 stop23h 04mSpirit Airlines
Deal found 9/10$326
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.
Tue 10/147:00 amSDF - GEG
1 stop7h 42mUnited Airlines
Thu 10/235:05 amGEG - SDF
2 stops10h 28mUnited Airlines
Deal found 9/11$330
This Southwest deal was found by Cheapflights users on 9/8. 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.
Fri 12/1212:00 pmSDF - BOI
1 stop9h 30mSouthwest
Mon 12/1511:45 amBOI - SDF
1 stop7h 45mSouthwest
Deal found 9/8$340
This Southwest deal was found by Cheapflights users on 9/10. 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.
Mon 11/36:45 amSDF - BOI
2 stops10h 20mSouthwest
Wed 11/1212:05 pmBOI - SDF
2 stops9h 00mSouthwest
Deal found 9/10$343

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Idaho 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 11, 2025.
Use the filters below to find and compare flights from Louisville to Idaho that are best for you.

Fly from

Louisville

Fly to

Idaho

Route

Depart

Return

Price

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Wed 10/22

7:09 am-11:41 am

1 stop7h 32m

Spokane

Mon 10/27

12:51 pm-12:01 am

1 stop8h 10m

$254

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Wed 10/22

2:19 pm-6:46 pm

1 stop7h 27m

Spokane

Mon 10/27

12:33 pm-11:53 pm

1 stop8h 20m

$254

LouisvilleBoise

SDF - BOI

SDFBOI

Louisville Intl

Mon 11/3

7:15 pm-11:54 pm

1 stop6h 39m

Boise Air Term. Gowen Fld

Wed 11/12

11:42 am-11:00 pm

2 stops9h 18m

$259

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Tue 10/7

10:29 am-6:43 pm

2 stops11h 14m

Spokane

Thu 10/16

12:51 pm-12:01 am

1 stop8h 10m

$270

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Tue 11/18

7:39 am-12:32 pm

1 stop7h 53m

Spokane

Sat 11/22

11:59 pm-10:11 am

1 stop7h 12m

$300

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Thu 10/23

7:09 am-11:41 am

1 stop7h 32m

Spokane

Tue 10/28

12:51 pm-10:34 pm

1 stop6h 43m

$311

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Wed 10/22

6:00 am-11:41 am

1 stop8h 41m

Spokane

Tue 10/28

11:20 am-10:54 pm

2 stops8h 34m

$316

LouisvilleBoise

SDF - BOI

SDFBOI

Louisville Intl

Tue 9/30

7:44 pm-11:59 pm

1 stop6h 15m

Boise Air Term. Gowen Fld

Tue 10/7

1:39 pm-12:01 am

1 stop8h 22m

$317

LouisvilleIdaho Falls

SDF - IDA

SDFIDA

Louisville Intl

Wed 3/4

9:05 am-1:33 pm

1 stop6h 28m

Idaho Falls Fanning Field

Mon 3/9

2:35 pm-9:57 pm

1 stop5h 22m

$320

LouisvilleSpokane

SDF - GEG

SDFGEG

Louisville Intl

Thu 10/23

7:09 am-11:41 am

1 stop7h 32m

Spokane

Mon 10/27

12:51 pm-12:01 am

1 stop8h 10m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 46 results
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Best time to book a flight from Louisville to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Louisville 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 Louisville to Idaho

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

Currently, October is the cheapest month in which you can book a flight from Louisville to Idaho (average of $314). Flying from Louisville to Idaho in June is currently the most expensive (average of $398). 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 SDF to ID?

Find hourly flight availability from Louisville to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

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

How much does it cost to fly round-trip from Louisville to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Louisville to Idaho to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Louisville to Idaho. 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 from for flights from Louisville to Idaho?

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

  • How long is the flight from Louisville to Idaho?

    A quick flight from Louisville to Idaho can take about 6h 28m. Delta provides one of the quickest options available for as low as $320. The distance from Louisville to Idaho is about 1417 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    One-way options have recently been found by users for as low as $110 on Southwest. Other airlines that offer cheap prices include American Airlines from $122 and United Airlines from $133 one-way.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Louisville to Idaho 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 Louisville to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Louisville to Idaho (average of $314). Flying from Louisville to Idaho in June is currently the most expensive (average of $398). 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

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Alternative routes for Louisville to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Louisville to Idaho

Discover the top 4 airlines that operate flights from Louisville to Idaho. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$379FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$287Average$445FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$337Average$633FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$351Average$416FlexibilityNo cancel feeOn-time63%

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