I'm currently searching for Christmas flights yet websites like Opoda and eDreams list flights that don't exist on the airline's websites.
I prefer to book with the airline when possible but these third parties offer flights on bargain airlines (mostly Chinese) that are much cheaper than better airlines. Problem is these Chinese websites don't seem to have bookings for the dates available or even bookings for weeks before those dates.
Chinese airline websites are terrible from what I've found, so booking with them seems difficult even in the best case scenario so to get these cheap flights a third party is looking likely.
But just how are third parties able to list flights that don't exist on the airline's websites?