September is one of the best times of the year to fly to Guam from Philadelphia. Prices for September average $1,942 per person but you can even find prices for as low as $657. The most expensive prices can be found in the month of October. Opting for a September flight can save you 37% on your journey compared to booking in October
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to Guam as you normally would.