Alaska Airlines said on Wednesday it had completed its $1.9 billion acquisition of Hawaiian Airlines after reaching an agreement with the U.S. Department of Transportation.

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. Alaska will also assume about $900 million in Hawaiian debt.

Alaska Air Group has completed its acquisition of Hawaiian Airlines, the SeaTac-based airline said early Wednesday. The announcement follows Tuesday’s news that Alaska had cleared a Department of Transportation review, which allowed the merger to go forward provided the airlines met certain consumer-protection requirements.