TEMPE, Ariz. -

Superstorm Sandy wiped out November revenue gains for US Airways.

The storm caused airlines to cancel more than 20,000 flights, and many northeast airports were shut down, including US Airways' hub at Philadelphia. Sandy hit the New York area on October 29th, and airline disruptions lasted into early November.

US Airways says per-seat passenger revenue for the month was flat, but it would have risen 2 percent if not for Sandy. The Tempe, Arizona, airline has previously said that Sandy cut November profits by $20 million.

US Airways' November traffic rose 4.4 percent to 5.06 billion revenue passenger mile, or one paying passenger flown one mile. Its flying capacity rose 2.8 percent to 5.97 billion available seat miles.