BILILNGS – American Airlines announced a new direct seasonal service between Billings and Chicago O’Hare beginning June 3, 2021 and running through Sept. 7, 2021. This service will operate daily departing Billings at 1:45 p.m. and arriving in Chicago at 5:45 p.m. The return flight will depart Chicago at 11:50 a.m. and arrive in Billings at 2 p.m., Billings Logan International Airport said.