Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Maine to Guam as you normally would.
PWM stands for Portland Airport, while GUM stands for Tamuning Guam Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Bangor Airport (BGR), Augusta Airport (AUG), Bar Harbor Airport (BHB), Rockland Knox County Regional Airport (RKD), Presque Isle Airport (PQI) are some additional IATA codes for airports related to your trip.
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