Wouldn't the difference in 5-10 minutes not be the reason for the lack of fuel, though? I would guess a 4 hour flight would have enough fuel for at LEAST 5.5 ho

Wouldn't the difference in 5-10 minutes not be the reason for the lack of fuel, though? I would guess a 4 hour flight would have enough fuel for at LEAST 5.5 hours if they couldn't land at an airport and had to be diverted to another one (right before landing).