Five weeks after the merger was officially sanctioned, American Airlines and US Airways are extending cooperation further with the start of a codeshare agreement on selected routes from January 23.
The agreement will enable the airlines to sell seats on the other carrier using its own airline code and flight number.
The first phase will include the main hub airports of each airline, namely Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York JFK, Charlotte, Philadelphia, Phoenix and Reagan National Airport in Washingon DC.
Some international routes will also be covered at this stage and the new American Airlines Group has said it expects to fully complete the process across both entire networks "in the coming weeks."
To celebrate the closer integration, a bonus of an extra 50% AAdvantage miles will be offered to all American passengers who book US Airways flights until March 2.
Frequent flyers qualify for miles on both airlines but can only be accumulated on either American’s AAdvantage or US Airways’ Dividend Miles.
The company previously announced both reward schemes will join forces in 2015.
The next planned merger milestone to tick off will see US Airways surrender its Star Alliance membership and join with American in the oneworld alliance from March 31.
At the time of the merger announcement in early December, American Airlines Group management said both airlines would effectively operate as separate airlines for up to two years before fully integrating.
