To save up to 11% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland to Guam from $1,858 1-2 weeks out and tickets from $2,089 for flights departing within the next 72 hours.
When flying from Portland to Guam, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Flights from Portland to Guam lean towards being more expensive in December. Prices are generally better when you fly from Portland to Guam in June, with the cheapest ticket starting at $1,349.