Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Las Vegas to Idaho Falls from $104

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Las Vegas to Idaho Falls departing on 5/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Las Vegas to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
12:45 pm - 3:31 pm
LAS
-
IDA
1h 46mnonstop
Allegiant Air Logo
10:31 pm - 11:19 pm
IDA
-
LAS
1h 48mnonstop
$122Allegiant Air
Fri, Feb 13 - Mon, Feb 23
Allegiant Air Logo
12:45 pm - 3:30 pm
LAS
-
IDA
1h 45mnonstop
Allegiant Air Logo
10:30 pm - 11:16 pm
IDA
-
LAS
1h 46mnonstop
$139Allegiant Air
Mon, Mar 2 - Mon, Mar 9
Allegiant Air Logo
12:45 pm - 3:31 pm
LAS
-
IDA
1h 46mnonstop
Allegiant Air Logo
10:31 pm - 11:19 pm
IDA
-
LAS
1h 48mnonstop
$155Allegiant Air
Fri, Feb 13 - Fri, Feb 20
Multiple Airlines Logo
12:45 pm - 3:30 pm
LAS
-
IDA
1h 45mnonstop
Multiple Airlines Logo
4:21 pm - 7:53 am
IDA
-
LAS
16h 32m
1 stop
$202Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Allegiant Air Logo
1:22 pm - 4:08 pm
LAS
-
IDA
1h 46mnonstop
Allegiant Air Logo
10:56 pm - 11:39 pm
IDA
-
LAS
1h 43mnonstop
$206Allegiant Air
Mon, Jun 22 - Fri, Jun 26
Multiple Airlines Logo
7:25 am - 10:10 am
LAS
-
IDA
1h 45mnonstop
Multiple Airlines Logo
6:00 am - 11:04 am
IDA
-
LAS
6h 04m
1 stop
$221Multiple Airlines
Mon, Jun 1 - Sat, Jun 6
Multiple Airlines Logo
12:45 pm - 3:31 pm
LAS
-
IDA
1h 46mnonstop
Multiple Airlines Logo
4:21 pm - 7:53 am
IDA
-
LAS
16h 32m
1 stop
$244Multiple Airlines
Fri, Feb 13 - Mon, Feb 23
Multiple Airlines Logo
12:45 pm - 3:31 pm
LAS
-
IDA
1h 46mnonstop
Multiple Airlines Logo
4:21 pm - 8:17 pm
IDA
-
LAS
28h 56m
2 stops
$267Multiple Airlines
Fri, Feb 13 - Mon, Feb 23
Multiple Airlines Logo
7:00 am - 9:39 pm
LAS
-
IDA
13h 39m
1 stop
Multiple Airlines Logo
4:21 pm - 7:53 am
IDA
-
LAS
16h 32m
1 stop
$269Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Alaska Airlines Logo
8:59 pm - 1:06 pm
LAS
-
IDA
15h 07m
1 stop
Alaska Airlines Logo
6:00 am - 11:04 am
IDA
-
LAS
6h 04m
1 stop
$295Alaska Airlines
Mon, Jun 1 - Sat, Jun 6

Allegiant Air flights from Las Vegas to Idaho Falls

Our best Allegiant Air deals on Las Vegas to Idaho Falls flight tickets
Allegiant Air
Feb 13
LAS12:45 pmLas Vegas Harry Reid Intl
1h 46m
IDA3:31 pmIdaho Falls Fanning Field
Feb 23
IDA10:31 pmIdaho Falls Fanning Field
1h 48m
LAS11:19 pmLas Vegas Harry Reid Intl
$122
Allegiant Air
Mar 2
LAS12:45 pmLas Vegas Harry Reid Intl
1h 45m
IDA3:30 pmIdaho Falls Fanning Field
Mar 9
IDA10:30 pmIdaho Falls Fanning Field
1h 46m
LAS11:16 pmLas Vegas Harry Reid Intl
$139
Allegiant Air
Feb 13
LAS12:45 pmLas Vegas Harry Reid Intl
1h 46m
IDA3:31 pmIdaho Falls Fanning Field
Feb 20
IDA10:31 pmIdaho Falls Fanning Field
1h 48m
LAS11:19 pmLas Vegas Harry Reid Intl
$155

Alaska Airlines flights from Las Vegas to Idaho Falls

Our best Alaska Airlines deals on Las Vegas to Idaho Falls flight tickets
Alaska Airlines
Jun 1
LAS8:59 pmLas Vegas Harry Reid Intl
15h 07m
1 stop
IDA1:06 pmIdaho Falls Fanning Field
Jun 6
IDA6:00 amIdaho Falls Fanning Field
6h 04m
1 stop
LAS11:04 amLas Vegas Harry Reid Intl
$295
Alaska Airlines
Feb 27
LAS11:59 amLas Vegas Harry Reid Intl
10h 37m
1 stop
IDA11:36 pmIdaho Falls Fanning Field
Mar 2
IDA5:20 pmIdaho Falls Fanning Field
7h 35m
1 stop
LAS11:55 pmLas Vegas Harry Reid Intl
$327
Alaska Airlines
Mar 6
LAS7:00 amLas Vegas Harry Reid Intl
8h 43m
1 stop
IDA4:43 pmIdaho Falls Fanning Field
Mar 8
IDA8:00 amIdaho Falls Fanning Field
15h 56m
1 stop
LAS10:56 pmLas Vegas Harry Reid Intl
$332

momondo Fare Finder

 
Customize your flight search to find flights from Las Vegas 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, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Las Vegas to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Fri 2/13

12:45 pm-3:31 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Mon 2/23

10:31 pm-11:19 pm

Nonstop1h 48m

$122

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 3/2

12:45 pm-3:30 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Mon 3/9

10:30 pm-11:16 pm

Nonstop1h 46m

$139

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Fri 2/13

12:45 pm-3:31 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Fri 2/20

10:31 pm-11:19 pm

Nonstop1h 48m

$155

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 3/2

12:45 pm-3:30 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Mon 3/9

4:21 pm-7:53 am

1 stop16h 32m

$202

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 6/22

1:22 pm-4:08 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Fri 6/26

10:56 pm-11:39 pm

Nonstop1h 43m

$206

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 6/1

7:25 am-10:10 am

Nonstop1h 45m

Idaho Falls Fanning Field

Sat 6/6

6:00 am-11:04 am

1 stop6h 04m

$221

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Fri 2/13

12:45 pm-3:31 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Mon 2/23

4:21 pm-7:53 am

1 stop16h 32m

$244

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Fri 2/13

12:45 pm-3:31 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Mon 2/23

4:21 pm-8:17 pm

2 stops28h 56m

$267

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 3/2

7:00 am-9:39 pm

1 stop13h 39m

Idaho Falls Fanning Field

Mon 3/9

4:21 pm-7:53 am

1 stop16h 32m

$269

Las VegasIdaho Falls

LAS - IDA

LASIDA

Las Vegas Harry Reid Intl

Mon 6/1

8:59 pm-1:06 pm

1 stop15h 07m

Idaho Falls Fanning Field

Sat 6/6

6:00 am-11:04 am

1 stop6h 04m

$295

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Las Vegas to Idaho Falls

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

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $111.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $78. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Wednesday is $126.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the afternoon. Flights from Las Vegas to Idaho Falls during this time can be as low as $96. Try not to purchase tickets in the morning because they tend to be around $111. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Las Vegas Harry Reid Intl to Idaho Falls Fanning Field flight route?

Fly from Las Vegas Harry Reid Intl to Idaho Falls Fanning Field for the best Las Vegas Harry Reid Intl - Idaho Falls Fanning Field flight prices

What cabin class options are available on Las Vegas Harry Reid Intl to Idaho Falls Fanning Field flights?

There is only 1 cabin class available to choose from on Las Vegas Harry Reid Intl to Idaho Falls Fanning Field flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Las Vegas to Idaho Falls flights?

No. A direct flight is the cheapest option for a flight between Las Vegas to Idaho Falls.

How have Las Vegas to Idaho Falls flight prices changed over time?

As of February 2026, prices for Las Vegas to Idaho Falls flights are approximately 59% more expensive when compared to flights at the same time last year.

When to book flights from Las Vegas to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Las Vegas to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Las Vegas to Idaho Falls (LAS to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Las Vegas to Idaho Falls

Best Price Found

$86

Fastest flight time

1h 45m

Direct flights

Tue and Sat

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Las Vegas in the past 72 hours is $86. The best round-trip flight deal from Las Vegas to Idaho Falls found on momondo in the last 72 hours is $117.
The fastest flight from Las Vegas to Idaho Falls takes 1h 45m
Direct flights go from Las Vegas to Idaho Falls on Tuesday and Saturday. The only airline offering direct flights is Allegiant Air.
There is 1 airport in Idaho Falls. From Las Vegas there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

  • How far is Las Vegas Harry Reid Intl to Idaho Falls Fanning Field by plane?

    The distance between Las Vegas Harry Reid Intl and Idaho Falls Fanning Field is about 529.6 mi. By plane, this route typically takes 1h 45m.

  • When did momondo last update prices for flights from Las Vegas Harry Reid Intl Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Las Vegas Harry Reid Intl Airport to Idaho Falls Fanning Field Airport are updated daily.

  • How many operators does momondo search for flights from Las Vegas Harry Reid Intl Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Las Vegas Harry Reid Intl Airport to Idaho Falls Fanning Field Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Las Vegas Harry Reid Intl Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The required travel and health documents for your Idaho Falls Fanning Field Airport 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 Falls Fanning Field Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Las Vegas to Idaho Falls?

  • What is the most popular airline from Las Vegas to Idaho Falls?

Best airlines flying from Las Vegas to Idaho Falls

Compare and see reviews for airlines that fly from Las Vegas to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $55Free CancellationRating
7.2
709 reviews
Search Allegiant Air flights
DeltaPriceFrom $149Free CancellationRating
7.9
8,139 reviews
Search Delta flights

  • Allegiant Air Flights From Las Vegas to Idaho Falls

    Allegiant Air is one of the most popular airlines flying from Las Vegas to Idaho Falls, operating 2 flights/week on average for this route. A good Allegiant Air flight deal for Las Vegas to Idaho Falls starts from $55 round-trip, up to an average price of $110. Our users have rated Allegiant Air at 7.2/10.

Traveling to a place near Idaho Falls?

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

Why use momondo?

Why should I use momondo to find a flight deal from Las Vegas to Idaho Falls?

Finding the right flight to Idaho Falls from Las Vegas 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 Falls quick and easy, saving you time and money.

Can I find flights from Las Vegas to Idaho Falls with flexible booking policies on momondo?

momondo does allow users to show only those flights to Idaho Falls from Las Vegas which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Las Vegas to Idaho Falls?

momondo helps you find the best flight between Las Vegas and Idaho Falls by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Las Vegas to Idaho Falls right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Las Vegas to Idaho Falls flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Idaho Falls trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/5
Thu 3/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States