The National Transportation Safety Board is investigating Saturday's incident involving Flight 715 from Venice.
Federal and airline officials have yet to say what caused several flight attendants to become nauseated and dizzy, with watery eyes. Officials say none of the 185 passengers on board was injured or sickened.
The flight landed at Dublin Airport on Saturday afternoon.
US Airways says doctors were examining the flight attendants while the airline arranged for the passengers to get to Philadelphia on other flights.