The best pricing can be found in the month of May. Prices to USA from Gillette average $422. You can even find prices in May for less than $422, as users have found deals to USA from as low as $314. The month of September appears to be one of the more expensive times to travel to USA from Gillette. Flying in the targeted month can save you up to 30%.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Gillette to USA as you normally would.