Plugin allows customers to research flights in a new way.

Delta Airlines is making big changes to its flight booking process this fall. The popular airline will roll out a revamped booking system starting October 1, which will offer more personalized options ...

Southwest is changing how travelers can discover and shop for flights, bringing a familiar travel-planning tool into the mix.

Think Tuesday is the cheapest day to book a flight? Travel experts say there's a better strategy for scoring lower fares.