Alaska Airlines closed its $1 billion purchase of Hawaiian Airlines on Wednesday, a day after the federal government removed the last major regulatory obstacle to the deal.

HONOLULU (HawaiiNewsNow) - Less than a day after getting federal approval, Alaska Airlines already closed its $1.9 billion deal to buy Hawaiian Airlines. Alaska made the merger a done-deal the same day the U.S. Department of Transportation allowed it to, and was ready to name the new top management team.

The two airlines agreed to preserve reward miles and “essential air support” for rural areas as part of the deal.