New airline rules will make it easier to get refunds for canceled flights. Here's what to know.

New consumer protection rules will soon entitle airline passengers to automatic refunds when flights are canceled or significantly delayed, while also requiring airlines to reveal junk fees upfront.

In total, the new rules could save travelers $500 million annually, Department of Transportation Secretary Pete Buttigieg said Wednesday, describing the regulations as "the biggest expansion of passenger rights in the department's history."

The new rules take aim at some of the most common complaints against airlines, such as delays and difficulties getting refunds. Airlines will also have to disclose all possible fees, such as added costs for seat selection, when advertising a fare.