The current schedule does not require any repositioning flights as there are adequate stations that can transfer 747s.
Historically the most common repositioning flight is SFO
. This is because SFO
is the main hub of 747 flying and ORD
is where A checks are done. HKG
all can rotate 747s, so flying between the cities is not needed, but I wouldn't be surprised to see SFO
pop up in the summer schedule again. It's used as a virtual spare route however so it can easily get downgauged to a 777 3-class + A319. The 747 is needed to cover Hawaii routes if a 777-200 2-class is down for maintenance as it is the only plane with enough capacity to cover the route. Also, UA
wants to have a spare 747 in SFO
in the morning and ORD
in the afternoon. The morning is used in case any of the international departures has a mechanical problem with an inbound airplane. ORD
is because the Asia departures are in the afternoon.
Other routes domestic routes can see 747s, but if you are searching for a 3 class plane, 767s and 777s appear on domestic routes more often (especially ORD
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