The cheapest times to fly from ISN to GEG are
- January 1st to February 25th
- August 6th to November 4th
- early December
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 GEG is mid to late August. Prices can be as high as $1376 for Monday flights during early to mid May, or as low as $306 for Saturday flights around mid to late August.
When to Fly to Spokane
Flying from Williston, ND (ISN) to Spokane, WA (GEG) will usually cost between $417 to $862 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late August with an average ticket price of $480. Due to high demand the most expensive time to fly is early to mid May, with an average price of $1119. Planning your trip to low-cost times can easily save you $639 on economy flights and even more on first-class flights. Generally, any price below $646 can be considered a good price for a round-trip ISN to GEG flight.
See below for a graph of average weekly prices for the ISN to GEG route. All prices are for round-trip tickets in USD.
Compared to other flights, the ISN to GEG flight is cheaper than the average and costs less than the average flight leaving from Williston. The average price per mile (for a direct flight) is $0.62, which is above average.
Flight Prices by Day of the Week
Saturday is usually the cheapest day to fly to GEG. Mondays are the most expensive days to fly to Spokane. Selecting flights on the least expensive days could save you up to $90 (12%) 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 $560. Return trip prices are from the GEG to ISN flight, and often highlight the quality of our data in showing the same trend.