WATCH: US Airways jet becomes American Airlines plane

American Airlines posted this time-lapse video of the first U.S. Airways jet to undergo a makeover and emerge with the new company paint job.

The airlines completed their merger in December and became the world’s largest carrier. The company expects it could take two years to fully integrate the two airlines.

The merger survived a challenge from the government and criticism from consumer groups, who fear it will lead to higher prices. It’s the latest in a series of mergers that will leave four airlines controlling more than 80 percent of the U.S. air-travel market and with more power than ever to limit seats and boost profits. Here’s a merger timeline.

The new airline company earned $480 million during the first three months of 2014, a record for the first quarter. As separate airlines, American and US Airways lost $297 million a year earlier. The profit was helped by the sale of takeoff and landing slots at Washington’s Reagan National Airport.

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