This page displays the approximate flight duration time for a non-stop flight. The actual travel time may differ depending on the type and speed of the aircraft. Also note that the calculated distance between the two cities of Guam and Hanoi is the direct air distance (distance as the crow flies). Traveling on land involves larger distances.
Time difference between Guam and Hanoi
USA and Vietnam air distance
Air distance from Guam to cities near Hanoi:
latitude: 13° 29' North
longitude: 144° 45' East
latitude: 21° 01' North
longitude: 105° 53' East