The cheapest times to fly from ISN to LAS are

  • January 1st to February 11th
  • April 23rd to May 6th
  • July 16th to September 16th
  • October 15th to November 4th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ISN to LAS is late January. Prices can be as high as $1023 for Sunday flights during early March, or as low as $340 for Saturday flights around late January.


When to Fly to Las Vegas

Flying from Williston, ND (ISN) to Las Vegas, NV (LAS) will usually cost between $390 to $762 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $441. Due to high demand the most expensive time to fly is early March, with an average price of $743. Planning your trip to low-cost times can easily save you $302 on economy flights and even more on first-class flights. Generally, any price below $563 can be considered a good price for a round-trip ISN to LAS flight.

See below for a graph of average weekly prices for the ISN to LAS route. All prices are for round-trip tickets in USD.

ISN to LAS Flight Prices

Compared to other flights, the ISN to LAS flight is cheaper than the average and costs much less than the average flight leaving from Williston. The average price per mile (for a direct flight) is $0.34, which is in the normal range for a flight.


Flight Prices by Day of the Week

Saturday is usually the cheapest day to fly to LAS. Sundays are the most expensive days to fly to Las Vegas. Selecting flights on the least expensive days could save you up to $103 (15%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Saturday and returning a week later will cost an average of $482. Return trip prices are from the LAS to ISN flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ISN to LAS can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 49 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from ISN to LAS? We’ve got answers.

Which airlines fly this route?

You can find 3 major airlines flying this route most often: Alaska, Delta, United, and potentially more during busy seasons.

How far away is it from McCarran International Airport to Sloulin Field International Airport?

The distance between the two airports is roughly 1020 miles or 1642 kilometers.

How long does it take to fly from ISN to LAS?

The real-world flight time for a nonstop ISN to LAS flight is about 2 hour 49 minutes.

How many flights go between Williston, ND and Las Vegas, NV?

It depends on the day of the week and the date, but a typical day might have around 64 available flights from ISN to LAS.


Airport Location Info


Departing Airport

Origination code ISN
Origination airport name Sloulin Field International Airport
City Williston, ND
Country the United States
Latitude 48.2
Longitude -103.6

Return Airport

Destination code LAS
Destination airport name McCarran International Airport
City Las Vegas, NV
Country the United States
Latitude 36.1
Longitude -115.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.