This summer, American Airlines will be starting transferring US Airways passenger reservations to its own system with the goal of phasing out the US Airways brand by the end of the year.

American Airlines has merged with US Airways in December 2013. On Tuesday, it has notified travel agents and online ticket sites that it would be starting the transition by July, with the final 'operational cutover' 90 days later, in October, when flights with the US Airways brand will end.

In the merger, creating the world's largest airline with 100,000 employees and 6,700 daily flights, getting to a single reservation system was one of the most complex steps.

Maya Leibman, American's chief information officer, said, "It's a complex and harried process to make it all work seamlessly. Ideally what happens at the end of this, our customers say, 'What integration?' They had no idea that anything actually happened".

For now and 90 days after the beginning, US Airways customers will still be on US Airways-coded flights.

After it in October, the flights will technically become American flights. The timings of departure and flight schedules will remain the same but the letter code on the reservation will change: AA instead of US. Travelers who are booking now for the holidays and beyond can still visit usairways. com.

Beginning in October, fliers with future reservations will be getting an e-mail alert regarding the information that their US Airways flight has been rebranded AA. For instance, what has been US5227 to Dayton, Ohio, will become AA5227 to Dayton.

The passengers who will book flights in October and beyond will be redirected to the American website aa. com. The US Airways website will disappear eventually.

The US Airways airport check-in kiosks and ticket counters will be renamed 'American' in October.