I’ve actually used both Priceline and Expedia, and honestly, it depends on what you value more. A few months ago, I booked a flight through Priceline because it had a slightly cheaper deal, but later I had to change my travel dates. That’s where things got a little tricky—going through their system took longer than I expected. With Expedia, I’ve found it a bit easier to manage cancellations and changes directly online. What saved me, though, was calling 866-204-0803—it’s hands down the fastest way to book, cancel, or modify flights without waiting forever. I’ve started using that number whenever I need adjustments, no matter which site I originally booked with. If you’re just buying a simple ticket, either works, but if you think plans might change, Expedia has been smoother in my experience.