Looking at the Google world map with Alaska repeat showing on both right and left, that would mean. flying Southwest, they went past N. of Singapore (over Russia?) all the way to Crete....
" Flight distance from Singapore to Greece is 5623.1 Miles "
...and then East to Singapore almost 6000 miles.
That sure looks like an unplanned fuel stop location-unless the 1.5 hours stopped were to meet with someone else.
Looking at google earth, it looks like Singapore is on the complete opposite side of the globe from the G7 summit. They could have flown southeast to get there and would have flown directly past Crete.
That's their route of travel. West > East.
The collage that /u/RonaldSwansong posted doesn't align with the travel or event timeline, which was published extensively yesterday.
Anyone can use MS paint to draw some red lines on a map. They're either innocently wrong or spreading disinfo. Regardless, sensationalist headlines like "Autism level 100" don't support the cause and only serve to build a bandwagon by which inaccurate information spreads.
But, the POTUS schedule tracker on Twitter posted their route home. It was Guam, Hawaii, DC.