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$82+ Cheap flights from Idaho Falls to Las Vegas (IDA - LAS)

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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LAS
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl are usually found in June or August, booked 26 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap flight deals from Idaho Falls to Las Vegas

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Las Vegas (LAS). 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 19, 2025.

Round-trip from

$84
(Cheapflightsfares)

One-way from

$82
(Kiwi.com)

Popular in

December

Cheapest in

June

Average price

$130

Good round-trip deal

$100 or less

Good one-way deal

$71 or less
From Idaho Falls Fanning Field to Las Vegas Harry Reid Intl
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One-way flight from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl
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Highest demand for flights based on searches. 20% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl.
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Price to beat on a one-way flight from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl.
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Find flight deals from Idaho Falls to Las Vegas

Cheapest flights from Idaho Falls to Las Vegas
Explore the most affordable flight options available from Idaho Falls to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 19, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:56 pmIDA - LAS
Nonstop1h 43mAllegiant Air
Fri 11/2112:09 pmLAS - IDA
Nonstop1h 46mAllegiant Air
Deal found 9/17$84
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/38:52 pmIDA - LAS
Nonstop1h 43mAllegiant Air
Fri 11/71:22 pmLAS - IDA
Nonstop1h 46mAllegiant Air
Deal found 9/17$96
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:40 pmIDA - LAS
Nonstop1h 43mAllegiant Air
Fri 10/241:25 pmLAS - IDA
Nonstop1h 49mAllegiant Air
Deal found 9/19$104
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:56 pmIDA - LAS
Nonstop1h 43mAllegiant Air
Mon 11/1710:21 amLAS - IDA
Nonstop1h 46mAllegiant Air
Deal found 9/18$130
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/710:56 pmIDA - LAS
Nonstop1h 42mAllegiant Air
Mon 11/1010:21 amLAS - IDA
Nonstop1h 46mAllegiant Air
Deal found 9/16$132
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:39 pmIDA - LAS
Nonstop1h 44mAllegiant Air
Fri 9/261:16 pmLAS - IDA
Nonstop1h 49mAllegiant Air
Deal found 9/17$134
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1010:57 pmIDA - LAS
Nonstop1h 42mAllegiant Air
Mon 10/1310:00 amLAS - IDA
Nonstop1h 49mAllegiant Air
Deal found 9/18$140
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:56 pmIDA - LAS
Nonstop1h 42mAllegiant Air
Mon 11/1710:21 amLAS - IDA
Nonstop1h 46mAllegiant Air
Deal found 9/17$148
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:55 pmIDA - LAS
Nonstop1h 44mAllegiant Air
Mon 9/2912:00 pmLAS - IDA
Nonstop1h 49mAllegiant Air
Deal found 9/17$169
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:57 pmIDA - LAS
Nonstop1h 42mAllegiant Air
Mon 10/610:00 amLAS - IDA
Nonstop1h 49mAllegiant Air
Deal found 9/18$182

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Las Vegas 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 19, 2025.
Use the filters below to find and compare flights from Idaho Falls to Las Vegas that are best for you.

Fly from

Idaho Falls

Fly to

Las Vegas

Route

Depart

Return

Price

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Mon 11/17

7:56 pm-8:39 pm

Nonstop1h 43m

Las Vegas Harry Reid Intl

Fri 11/21

12:09 pm-2:55 pm

Nonstop1h 46m

$84

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Mon 11/3

8:52 pm-9:35 pm

Nonstop1h 43m

Las Vegas Harry Reid Intl

Fri 11/7

1:22 pm-4:08 pm

Nonstop1h 46m

$96

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Mon 11/10

7:56 pm-8:39 pm

Nonstop1h 43m

Las Vegas Harry Reid Intl

Mon 11/17

10:21 am-1:07 pm

Nonstop1h 46m

$130

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Fri 11/7

10:56 pm-11:38 pm

Nonstop1h 42m

Las Vegas Harry Reid Intl

Mon 11/10

10:21 am-1:07 pm

Nonstop1h 46m

$132

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Fri 11/14

10:56 pm-11:38 pm

Nonstop1h 42m

Las Vegas Harry Reid Intl

Mon 11/17

10:21 am-1:07 pm

Nonstop1h 46m

$148

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Fri 11/7

4:58 pm-7:07 pm

1 stop27h 09m

Las Vegas Harry Reid Intl

Mon 11/10

10:21 am-1:07 pm

Nonstop1h 46m

$226

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Fri 3/13

10:13 pm-10:59 pm

Nonstop1h 46m

Las Vegas Harry Reid Intl

Mon 3/16

12:28 pm-3:14 pm

Nonstop1h 46m

$235

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Thu 12/11

4:39 pm-5:24 pm

Nonstop1h 45m

Las Vegas Harry Reid Intl

Sun 12/14

1:00 pm-3:49 pm

Nonstop1h 49m

$253

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Sat 12/6

4:19 pm-8:46 pm

1 stop5h 27m

Las Vegas Harry Reid Intl

Wed 12/10

5:20 am-1:35 pm

1 stop7h 15m

$279

Idaho FallsLas Vegas

IDA - LAS

IDALAS

Idaho Falls Fanning Field

Sat 10/11

6:53 pm-10:25 pm

1 stop4h 32m

Las Vegas Harry Reid Intl

Tue 10/14

5:13 pm-10:15 pm

1 stop4h 02m

$290

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 results
1
2

Best time to book a flight from Idaho Falls to Las Vegas

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

How far ahead should I book a flight from Idaho Falls to Las Vegas?

Use this chart to determine the optimal time to book a round-trip flight from Idaho Falls to Las Vegas. Price data was last updated on September 12, 2025.

The best time to book flights from Idaho Falls to Las Vegas is 26 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Las Vegas (average of $198). Flying from Idaho Falls to Las Vegas in March is currently the most expensive (average of $269). 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 IDA to LAS?

Find hourly flight availability from Idaho Falls to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 19, 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho Falls to Las Vegas in the morning. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Idaho Falls to Las Vegas?

Use this chart to determine the cheapest time to fly round-trip from Idaho Falls to Las Vegas. Price data was last updated on January 26, 2025.

Travelers seeking maximum savings on their Idaho Falls to Las Vegas flight should consider departing on Monday evenings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Las Vegas

Get insights into the airlines that provide service to Las Vegas. 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 Las Vegas. Reviews last updated September 19, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Idaho Falls to Las Vegas have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Allegiant Air
7.2
Good
699 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Related info for your journey

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

  • How popular is this Idaho Falls to Las Vegas flight route?

    This flight path from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl was viewed by 12 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Idaho Falls to Las Vegas?

    Allegiant Air can get you from Idaho Falls to Las Vegas in just under 1h 43m. Your travel time will be generally consistent. Airlines will cover a distance of 538 mi. Most flights are nonstop.

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

    Allegiant Air, at $82, was found to be the cheapest airline from Idaho Falls to Las Vegas.Alternate airlines to your destination round-trip include Delta and Alaska Airlines. Allegiant Air is currently priced 53% below the average price you’ll pay for this route.

  • What are the cheapest flights from Idaho Falls to Las Vegas?

    While on average a flight from Idaho Falls to Las Vegas is generally $99, our data shows the cheapest flight currently is $54. When looking at the most popular route, (Idaho Falls Fanning Field - Las Vegas Harry Reid Intl), you can expect to pay $96 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho Falls to Las Vegas 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 Falls to Las Vegas?

    Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Las Vegas (average of $198). Flying from Idaho Falls to Las Vegas in March is currently the most expensive (average of $269). 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 Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Paradise
Henderson
North Las Vegas
Sunrise Manor
Winchester
Kingman
Primm
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Mesquite
Needles
Boulder City

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Top 4 airlines flying from Idaho Falls to Las Vegas

Discover the top 4 airlines that operate flights from Idaho Falls to Las Vegas. 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 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$82Average$142FlexibilityNo cancel feeOn-time88%
DeltaCheapest$132Average$347FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$189Average$435FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$310Average$628FlexibilityNo cancel feeOn-time69%

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