Snow and winter storms can hit several states in the midst of holiday travel

A record number of people are expected to fly this holiday season, with the Transportation Security Administration (TSA) projecting that will show 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 keep in mind – from when you can expect a refund for a canceled flight to how to deal with potentially lost luggage.

When are you entitled to a flight refund?

According to Department of Transportation (DOT) new “Automatic Refund” ruleare you entitled to a refund if:

• Your flight is canceled and the airline does not rebook you or you do not accept rebooking.

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

How do you get a refund for a canceled flight?

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

What if the airline loses your luggage?

Airlines are required by law to compensate passengers if their bags are damaged, delayed or lost.

If your baggage is significantly delayed (ie, not delivered within 12 hours of a domestic flight arriving at the gate, or 30 hours for international flights), you are eligible for a refund of a checked baggage fee, according to the DOT.

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