The best pricing can be found in the month of May. Prices to Guam from Colorado average $1,952. You can even find prices in May for less than $1,952, as users have found deals to Guam from as low as $1,560. The month of March appears to be one of the more expensive times to travel to Guam from Colorado. Flying in the targeted month can save you up to 8%.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Guam as you normally would.