To save up to 78% on this flight, we recommend booking at least 55 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Idaho Falls to North Dakota from $311 1-2 weeks out and tickets from $488 for flights departing within the next 72 hours.
Due to multiple factors, expect to potentially pay more when booking in February. For low rates, April can be a great choice for travel to North Dakota. Flights to North Dakota from Idaho Falls in April are about $287 on average during April, but can be found for as low as $167.