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Idaho Falls

$447+ Cheap flights from Louisville to Idaho Falls (SDF - IDA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — IDA
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
1 adult, Economy
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Cheap flight deals from Louisville to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 14, 2025.

Round-trip from

$447
(United Airlines)

Popular in

September

Cheapest in

October

Average price

$773
From Louisville Intl to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 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 Falls

Cheapest flights from Louisville to Idaho Falls
Explore the most affordable flight options available from Louisville to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2025.

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.
Fri 10/31:58 pmSDF - IDA
2 stops10h 51mUnited Airlines
Tue 10/72:35 pmIDA - SDF
1 stop5h 55mUnited Airlines
Deal found 9/12$447
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.
Sat 10/44:43 pmSDF - IDA
1 stop6h 42mAmerican Airlines
Sat 10/116:44 amIDA - SDF
1 stop7h 31mAmerican Airlines
Deal found 9/12$524
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 10/43:30 pmSDF - IDA
1 stop24h 03mUnited Airlines
Sat 10/1110:50 amIDA - SDF
2 stops21h 11mUnited Airlines
Deal found 9/12$535
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.
Thu 10/99:01 amSDF - IDA
1 stop26h 47mUnited Airlines
Tue 10/145:00 amIDA - SDF
1 stop15h 30mUnited Airlines
Deal found 9/12$768

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Idaho Falls 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 14, 2025.
Use the filters below to find and compare flights from Louisville to Idaho Falls that are best for you.

Fly from

Louisville

Fly to

Idaho Falls

Route

Depart

Return

Price

LouisvilleIdaho Falls

SDF - IDA

SDFIDA

Louisville Intl

Fri 10/3

1:58 pm-10:49 pm

2 stops10h 51m

Idaho Falls Fanning Field

Tue 10/7

2:35 pm-10:30 pm

1 stop5h 55m

$447

LouisvilleIdaho Falls

SDF - IDA

SDFIDA

Louisville Intl

Tue 3/3

9:05 am-3:39 pm

1 stop8h 34m

Idaho Falls Fanning Field

Wed 3/4

2:35 pm-9:59 pm

1 stop5h 24m

$451

LouisvilleIdaho Falls

SDF - IDA

SDFIDA

Louisville Intl

Sat 10/4

4:43 pm-9:25 pm

1 stop6h 42m

Idaho Falls Fanning Field

Sat 10/11

6:44 am-4:15 pm

1 stop7h 31m

$524

LouisvilleIdaho Falls

SDF - IDA

SDFIDA

Louisville Intl

Tue 3/3

10:10 am-10:21 pm

2 stops14h 11m

Idaho Falls Fanning Field

Wed 3/4

6:00 am-10:55 pm

2 stops14h 55m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Best time to book a flight from Louisville to Idaho Falls

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

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

Currently, October is the cheapest month in which you can book a flight from Louisville to Idaho Falls (average of $380). Flying from Louisville to Idaho Falls in December is currently the most expensive (average of $578). 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.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Falls. Reviews last updated September 14, 2025.
Get a feel of what it's like to fly with United Airlines and American Airlines from Louisville to Idaho Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,931 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,931 reviews
United Airlines
7.4
Good
8,931 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,931 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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

  • How long is the flight from Louisville to Idaho Falls?

    A quick flight from Louisville to Idaho Falls can take about 10h 51m. United Airlines provides one of the quickest options available for as low as $447. There are 1417 mi between Louisville and Idaho Falls.

  • What are the cheapest airlines flying from Louisville to Idaho Falls round-trip?

    Flying on American Airlines is currently your cheapest option to Idaho Falls, with prices starting at $323. Another option worth looking into is United Airlines, starting at $337 round trip. These flights start at 39% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Louisville to Idaho Falls (average of $380). Flying from Louisville to Idaho Falls in December is currently the most expensive (average of $578). 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 Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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Top 2 airlines flying from Louisville to Idaho Falls

Discover the top 2 airlines that operate flights from Louisville to Idaho Falls. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$323Average$488FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$337Average$619FlexibilityNo cancel feeOn-time69%

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