A record number of people are expected to fly this holiday season, with the Transportation Security Administration (TSA) predicting it will screen 18.3 million people during Thanksgiving week alone.

If you’re one of the millions of people traveling during this busy time, here’s a quick guide to what to consider, from when you can expect a refund for a canceled flight to how to deal with possible lost luggage.

When are you entitled to a refund for your flight?

Under the Department of Transportation’s (DOT) new automatic refund rule, you are entitled to a refund if:

• Your flight has been canceled and the airline does not rebook you or does not accept a rebooking.

• Your flight has been significantly changed and you do not accept the changed itinerary or any alternative compensation.

How do you get money back for a canceled flight?

The new DOT policy changed how passengers receive refunds. Previously, passengers were responsible for navigating airline policies to determine if they were entitled to a refund and then explicitly requesting one. Under the new rules, airlines must automatically issue refunds, without passengers having to explicitly request them.

What if the airline loses your luggage?

Airlines are legally required to compensate passengers if their luggage is damaged, delayed or lost.

According to the DOT, if your baggage is significantly delayed (i.e. not delivered to the gate within 12 hours of arrival of a domestic flight, or 30 hours for international flights), you are entitled to a refund of your checked baggage fee.

Read more from Yahoo News: Canceled flights? Lost luggage? These are your rights as an air traveler this holiday season.