By Keith Laing - 09/18/13 02:31 PM EDT
The airlines also say they have minimal overlap in their current non-stop flight schedules.
Reps. Michael Burgess (R-Texas), Robert Brady (D-Pa.), Pat Meehan (R-Pa.), Marc Veasey (D-Texas) and Robert Pittenger (R-N.C.) are also scheduled to appear in support of the proposed merger.
US Air and American announced their intention to merge in February. The combination of the companies is estimated to be worth $11 billion.
The airlines have said they will operate under the American name, though much of the combined companies top leadership will be current US Airways' executives.