GTF to LAS, Great Falls International Airport to Harry Reid International Airport Cheap Flights

Based on HopeGoo data, Allegiant Air offers one-way fares as low as US$52 on Cheapest nonstop routes (e.g. GTF to LAS on Mon, Apr 13), while Allegiant Air offers Cheapest nonstop round-trips from US$190 departing on Fri, Mar 13 and returning on Fri, Mar 20.

It takes about 2 hours 18 minutes to fly from Great Falls to Las Vegas.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Great Falls to Las Vegas is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Great Falls to Las Vegas, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Apr 13, with one-way flights priced at just US$52. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Allegiant Air. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Las Vegas travel is around July. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Great Falls to Las Vegas is September, when demand for travel is lower.

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Great Falls to Las Vegas on March 13, 2026 with Allegiant Air, with prices starting at US$190.

The time difference between Las Vegas and Great Falls is 1h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your HopeGoo, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.