Two recent plane crashes have caused some passengers to pull back on air travel plans, according to two of the airlines that had those crashes.

Bastian did not reveal just how much ticket sales have slowed, but Delta added that on top of the “casual facts” of crashes and worries about safety, the unreliability of the economy and a drop in consumer confidence are also playing a role in lowering demand.

Executives from Delta Air Lines and American Airlines have recognized these incidents as factors contributing to a slowdown in ticket sales and broader economic concerns. Delta Ai