CHICAGO (CBS) — Two airlines are making sure their Boeing 737 Max jets aren’t flying anytime soon.

American Airlines has cancelled all of its Boeing 737 Max flights until the middle of august. That’s about 115 flights a day.

United has grounded its 737 Max flights through July.

The widespread cancellations come after the Max’s anti-stall software was implicated in two fatal crashes in Ethiopia and Indonesia since October.