class and business class tickets. So does Virgin America, which said it allows children under 5 to board early. US Airways tweaked its child preboarding rules within the past year -- allowing families with kids to get on the plane after the call for Zone 2, but before the general boarding announcement. Previously the airline had allowed earlier boarding. We 're always looking for ways to make the boarding process a little more efficient and quicker for our passengers, said spokeswoman Liz Landau. Have you had a good or bad experience trying to preboard a flight ? Please share your experiences in the comments section below.