Planning a Summer Vacation? Here's What to Expect.

And airlines are not required to issue a refund for a significantly delayed flight that you choose to take; if a flight is significantly delayed, you may want to cancel your reservation, rebook another flight and collect a refund. Most airlines let you apply those funds to any new flight, and some, such as American and United, will even allow you to transfer your flight credit to someone else. Expedia issued credits for the flights, but this past December, when he tried to book tickets using the credits for new flights this summer, he encountered error messages online. [Extracted from the article]