In this reality, Charles Xavier became the Juggernaut who formed the X-Men. Thunderbird is a member of Charles Xavier's X-Men who serves as a police force that aids the mutants and persecutes the sapiens.
The total flight duration from Sydney, Australia to Boston, MA is 20 hours, 41 minutes. This assumes an average flight speed for a commercial airliner of 500 mph, which is equivalent to 805 km/h or 434 knots. It also adds an extra 30 minutes for take-off and landing. Your exact time may vary depending on wind speeds.
You'll have to get a flight from Manila to Sydney first (or Melbourne) via PAL which takes about 10 hours and then get a connection with Air New Zealand. I'm just not sure how long that will be but the first answer seems close to the actual travel time. Source(s): my work.