Bella Thorne -- I Finally Made it to London After 'Plane Crash' (PHOTO)

Bella Thorne and Gregg Sulkin arrived safe and sound at London's Heathrow airport after a very bad start ... when their plane crashed into a fence at JFK.

The wing of their Virgin Atlantic jet struck a blast fence Saturday, and they were 12 hours delayed.

The belatedly arrived -- 12 hours later -- on Delta. No pics of Bella Hadid, who was also on the Virgin flight.