A Delta regional flight operated by Endeavor, departing from Minneapolis, crashed at a Toronto airport, after the recent midair collision near DCA.

While at least 18 people were injured, all 80 people on board survived. Right now, it’s not clear what went wrong. A passenger jet flipped onto its roof while landing in Toronto, Canada, the fourth major aviation accident in North America in the past three weeks.

Delta Air Lines is offering to pay $30,000 to each passenger of Delta Connection Flight 4819, which crashed while landing at Toronto Pearson International Airport on Monday afternoon. The Atlanta-based airline confirmed the amount Wednesday afternoon.