I'm going to be booking flights to Europe in the next month or two so I'm always looking them up but since I'm not really fussed which city I fly in and out of it's such a hassle to actually find what the cheapest airfare is. They obviously vary quite wildly between cities and slightly different dates as well which creates a lot of combinations to check.
Is there a site which can check multiple cities at once or something similar? I'm aware of kayak.com.au/explore which is ok but only shows for pretty random dates and they're usually very short durations.
Google Travel. Put in your departing city and dates of travel and put the destination as "Europe".
https://www.google.com.au/travel
edit: I forgot how useful this is. Set it to 2 weeks in September and found a return flight to Greece for $900. So very tempting…