Mark Wahlberg and Seth MacFarlane have both said they were originally booked on American Airlines Flight 11, which was hijacked during the September 11 attacks and crashed.
The outlets describe the actors as having avoided traveling on the flight, which would have made them passengers on the doomed route. They frame the accounts as a near miss from bookings that did not ultimately lead to them being on board. Both articles state that the two men were booked on the same flight, though they do not provide detailed, independently verified explanations of how the change in travel plans happened.
Across the two sources, the focus is on the personal proximity to the tragedy through airline bookings and public figures connected to those reservations. Both pieces emphasize that Flight 11 is the specific flight referenced, while offering broadly similar wording and limited additional context beyond the claim that they were prevented from taking the flight.