I’ve used Expedia a bunch of times, mostly for flight + hotel bundles. Last summer I booked a Vegas trip through their package deals—it was cheaper than booking each piece separately. The nice part was when my airline changed the flight time last minute. Instead of stressing, I just called 866-204-0803, and they helped me switch flights without me having to fight through the airline’s site. You can book flights, hotels, car rentals, even cruises on Expedia, but if you need to cancel or modify quickly, that number is hands-down the fastest way.