$120 Cheap Flights from Idaho Falls (IDA) to Las Vegas (LAS)

View $120 flight on Mon, Nov 3, 2025Opens in a new window

Popular airlines from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)

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Cheap Flights from Idaho Falls to Las Vegas (IDA-LAS)

Prices were available within the past 7 days and start at $120 for one-way flights and $235 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Jan 21 - Wed, Jan 21
IDA
Idaho Falls
LAS
Las Vegas
$235 Roundtrip, found 1 day ago
$235
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Jan 21 from Idaho Falls to Las Vegas, returning Wed, Jan 21, priced at $235 found 1 day ago
Bargain Flight
Tue, Oct 14 - Sat, Oct 18
IDA
Idaho Falls
LAS
Las Vegas
$240 Roundtrip, found 3 days ago
$240
Roundtrip
found 3 days ago
Select Bargain Flight flight, departing Tue, Oct 14 from Idaho Falls to Las Vegas, returning Sat, Oct 18, priced at $240 found 3 days ago
Hawaiian Airlines
Tue, Sep 30 - Wed, Oct 8
IDA
Idaho Falls
LAS
Las Vegas
$240 Roundtrip, found 23 hours ago
$240
Roundtrip
found 23 hours ago
Select Hawaiian Airlines flight, departing Tue, Sep 30 from Idaho Falls to Las Vegas, returning Wed, Oct 8, priced at $240 found 23 hours ago
United
Tue, Sep 16 - Tue, Sep 23
IDA
Idaho Falls
LAS
Las Vegas
$241 Roundtrip, found 11 hours ago
$241
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Sep 16 from Idaho Falls to Las Vegas, returning Tue, Sep 23, priced at $241 found 11 hours ago
Delta
Tue, Sep 16 - Tue, Sep 23
IDA
Idaho Falls
LAS
Las Vegas
$241 Roundtrip, found 11 hours ago
$241
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 16 from Idaho Falls to Las Vegas, returning Tue, Sep 23, priced at $241 found 11 hours ago
American Airlines
Wed, Jan 21 - Wed, Jan 28
IDA
Idaho Falls
LAS
Las Vegas
$241 Roundtrip, found 2 hours ago
$241
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Jan 21 from Idaho Falls to Las Vegas, returning Wed, Jan 28, priced at $241 found 2 hours ago
Alaska Airlines
Wed, Feb 4 - Fri, Feb 6
IDA
Idaho Falls
LAS
Las Vegas
$242 Roundtrip, found 1 hour ago
$242
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Feb 4 from Idaho Falls to Las Vegas, returning Fri, Feb 6, priced at $242 found 1 hour ago
Alaska Airlines
Sun, Nov 2 - Tue, Nov 4
IDA
Idaho Falls
LAS
Las Vegas
$244 Roundtrip, found 1 hour ago
$244
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sun, Nov 2 from Idaho Falls to Las Vegas, returning Tue, Nov 4, priced at $244 found 1 hour ago
United
Wed, Nov 19 - Thu, Nov 27
IDA
Idaho Falls
LAS
Las Vegas
$260 Roundtrip, found 3 days ago
$260
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 19 from Idaho Falls to Las Vegas, returning Thu, Nov 27, priced at $260 found 3 days ago
Delta
Fri, Nov 14 - Mon, Nov 17
IDA
Idaho Falls
LAS
Las Vegas
$262 Roundtrip, found 2 days ago
$262
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Nov 14 from Idaho Falls to Las Vegas, returning Mon, Nov 17, priced at $262 found 2 days ago

Find the cheapest month to fly from Idaho Falls (IDA) to Las Vegas (LAS)

January is typically the cheapest month to fly

From $219 - $574 per traveler.

Graph displaying average flight prices per month

Alternative airports near Las Vegas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to McCarran Intl. LAS. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $271
LAS
McCarran Intl.
CheapestClosest
Average driving time to city center6 min
Flights from $271
0
Flights from Idaho Falls (IDA) to Las Vegas (LAS)
Origin airport
Idaho Falls Regional
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$234
Distance
538 mi

Idaho Falls to Las Vegas Flights

The cheapest times to fly from Idaho Falls to Las Vegas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Idaho Falls to Las Vegas are during the month of January. You can find some of the cheapest flights from Idaho Falls to Las Vegas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Idaho Falls to Las Vegas

Sunday is one of the best days to book for cheap flights from Idaho Falls to Las Vegas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Idaho Falls to Las Vegas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Idaho Falls to Las Vegas in 2025. You can also book with separate airlines for your outbound and return journeys, from $120 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Idaho Falls to Las Vegas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Idaho Falls to Las Vegas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS) cost?
Lock in a cheap one-way flight from $120 or cheap return flight from $235 from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
January is the least expensive month to fly from IDA to LAS. Planning your trip for the off-season is often the key to better flight prices.
What is the cheapest airline that flies from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll take you from IDA to LAS. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
On average, you can take your pick of 2 nonstop flights departing from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS) weekly. If you can't find one that suits your schedule, think about booking a flight that includes a layover. Customize your search results on Expedia to include one or two stops and opt for the next best alternative.
What are the most popular departure times for flights from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
The 6 PM departures from IDA to LAS see the highest demand. They can also be more expensive. If you want to save on your trip, pick a less crowded time to fly.
What day of the week has the most flights from IDA to LAS?
Depart on a Friday if you're looking for the biggest selection of flights from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS).
What is the earliest flight from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
Idaho Falls Regional Airport (IDA)'s earliest flight to Harry Reid Intl. Airport (LAS) is at approximately 6:32PM UTC-7. With a flight time of 1h 52m, you'll touch down at around 7:24PM UTC-8.
How long does it take to fly from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
Flights from IDA to LAS have an average travel time of 1 hour and 52 minutes. The distance between the two is 540 mi.
What is the best time to fly from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
To touch down at Harry Reid Intl. Airport (LAS) without delays, book a flight that takes off from Idaho Falls Regional Airport (IDA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Las Vegas from Idaho Falls Regional Airport (IDA)?
Harry Reid Intl. Airport (LAS) is the only airport in Las Vegas with direct flights from Idaho Falls Regional Airport (IDA). Check out the options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS) last-minute?
Booking your flight from IDA to LAS shortly before your journey is typically more expensive. But if there's some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book an IDA to LAS flight and hotel package?
Booking an IDA to LAS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our wide range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Idaho Falls Regional Airport (IDA) to Harry Reid Intl. Airport (LAS)?
Generally, it's possible to cancel or reschedule your IDA to LAS flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.