• Open the airline's app on your phone. Most apps will let you rebook your flight for free if you have your six-digit reservation code. It's also a good idea to get in line to speak to a representative and call the airline while you wait, but this may be slower than using the app.
• Check whether a hotel booking is necessary in case of an overnight stay.
• Federal law states that if the airline cancels your flight and you have to change your travel plans, you're entitled to a cash refund. Unfortunately, getting that refund can be a lengthy and frustrating process. Most airlines will start by offering a credit toward future travel, but before you accept it, be aware that travel credits may have restrictions, such as blackout dates. Soon, airlines will have to issue refunds within seven business days—either in cash or to the credit card used to make the booking—if you decline a travel credit.

Knowing what not to pack can help you avoid delays

As people travel this summer, the Transportation Security Administration is reminding the public not to pack certain items that are prohibited from being carried on board the aircraft. Avoiding these items can help prevent airport delays.