Route guide · 539 miles
Cheap Flights from Idaho Falls to Las Vegas
IDA → LAS · Nonstop 1h 36m · Live round-trip fares
Plenty of travelers price out Idaho Falls to Las Vegas every day — here's how to beat the average fare. Nonstops run about 1h 36m, and the calendar matters more than the airline. Aim to book 2–4 weeks ahead, stay flexible on the day of the week, and set a free alert so a price drop never slips past you.
Live fares for IDA → LAS are updating. Use the search below for real-time prices.
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Updated daily
Flight time
1h 36m
Nonstop, typical
Distance
539 mi
IDA → LAS
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
1
Allegiant Air
Nonstop flights from Idaho Falls to Las Vegas
The fastest way between the two cities is the nonstop: about 1h 36m for the 539-mile run from IDA to LAS. Those flights are flown by Allegiant Air. Prices behave best when you book 2–4 weeks out.
Booking insights: Idaho Falls → Las Vegas
- Distance: 539 miles · nonstop flight time: 1h 36m.
- Fares tend to bottom out when you book about 2–4 weeks ahead — earlier than that rarely helps, later usually hurts.
- Tuesday and Wednesday departures usually undercut Friday and Sunday fares on routes like this one.
- A free fare alert beats daily checking: we watch this route and ping you when prices drop.
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Flying from Idaho Falls to Las Vegas: what you need to know
The flight
The nonstop from IDA to LAS runs about 1h 36m over 539 miles. It's a comfortable mid-range flight: long enough that seat choice matters a little, short enough that paying up for extras rarely does.
Airlines on this route
Allegiant Air flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Idaho Falls (IDA)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Idaho Falls airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Las Vegas (LAS)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Las Vegas airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Las Vegas to Idaho Falls fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 539 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 1h 36m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
Idaho Falls to Las Vegas flight FAQs
How long is the flight from IDA to LAS?
A nonstop from IDA to LAS clocks in at around 1h 36m for the 539-mile trip. If you're connecting, budget an extra 2–4 hours depending on where you stop.
Are there nonstop flights from Idaho Falls to Las Vegas?
Allegiant Air typically operate nonstop flights from IDA to LAS. Nonstops are usually cheapest when booked 2–4 weeks ahead of departure.
What is the cheapest month to fly from Idaho Falls to Las Vegas?
Fares from Idaho Falls to Las Vegas tend to ease outside the peak summer and holiday rush — the late-summer and early-fall shoulder weeks are usually kinder on the wallet. Set a free Airfare Deal alert and we'll flag the dips for your dates.
How much are last minute flights from IDA to LAS?
Book inside the final week and you'll usually pay a premium on IDA to LAS. Fares booked 2–4 weeks ahead are almost always kinder.
What is a good round-trip deal from Idaho Falls to Las Vegas?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Idaho Falls to Las Vegas?
You'll mainly see Allegiant Air on Idaho Falls to Las Vegas. Checking each against the live fares below is the surest way to find the lowest price for your dates.
How early should I get to Idaho Falls airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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