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 Portland and Melbourne is the direct air distance (distance as the crow flies). Traveling on land involves larger distances.
Time difference between Portland and Melbourne
USA and Australia air distance
Air distance from Portland to cities near Melbourne:
latitude: 45° 31' North
longitude: 122° 39' West
latitude: 37° 49' South
longitude: 144° 58' East