The new US Airways finally takes to the air today as the nation's largest low-cost carrier, the result of a long-sought merger with America West Airlines and a yearlong bout with bankruptcy.

Customers should not experience many immediate changes -- it could take as long as two years for the planes to be painted, the workers to be united and for the two carriers to fly under one federally issued operating certificate.

Don't expect much fanfare, either. New US Airways Chief Executive Officer Doug Parker will ring the bell this morning on the New York Stock Exchange, and US Airways will begin trading under the ticker symbol LCC. At Pittsburgh International Airport, there will be free cake, coffee and a marching band.

Other than that, "It will pretty much be business as usual," said Carlo Bertolini, a spokesman for the combined airline.

Still, customers may be confused as two airlines merge into one. Here are some possible questions -- and answers -- to get you through the first few days:

Q: How should passengers book reservations?

A: The airline recommends that you book with the carrier you dealt with before the merger to cut down on confusion. Separate Web sites, www.americawest.com and www.usairways.com, will operate in the short term, as will separate reservations systems.

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Q: Where should I check in?

A: Your ticket will tell you which airline operates the flight -- go to that ticket counter today. Starting tomorrow, the America West ticket signs will come down at Pittsburgh International, and US Airways will be the only name visible.

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Q: How do I change reservations?

A: Make any changes online with the airline that sold you the ticket.

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Q: What about my frequent flier miles?

A: Miles form both carriers will be honored. Customers who have miles on both programs will have those miles consolidated next year. Starting Oct. 5, members can accrue miles in either program.

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Q: Can I still check in online?

A: In the short term, yes. Do so with the airline that issued the ticket. But also know that you may be redirected at some point in the near future, so give yourself enough time.