The Biden administration has approved the merger of Alaska Airlines and Hawaiian Airlines with some conditions. The Department of Transportation (DOT) has given its approval after a review of the potential impact on competition and consumer prices. The merger will create the fifth-largest airline in the US, with a combined fleet of over 300 planes. The DOT has imposed conditions to ensure that the merged airline maintains service to smaller airports and does not raise prices on certain routes. The merger is expected to be completed by the end of the year.