The latest step in the merger of two of the nation's largest airlines -- United Air Lines and Continental Airlines -- was plagued with glitches over the weekend, but most of the airline's flights were on schedule by Sunday.
The merger announced in 2010 will form the largest airline in the nation, under the name United. Many planes have yet to be repainted to carry the new United logo, but airline officials say the merger should be completed by the end of the year.
On Saturday, all flights previously booked on Continental became United flights. Also on Saturday, all United booking data was moved to the reservation platform previously used by Continental. Meanwhile, the Continental website was shut down, with all on-line traffic directed to United.com.
United officials acknowledged some glitches.
"With a project of this magnitude, it is natural that we would have a few technical issues, and we expected and prepared for operational challenges," United spokeswoman Megan McCarthy said in a statement. "We had numerous back-up processes in place to assist our employees during the transition, and we are continuing to work hard to take care of our customers."