Several airline and trip planning sites will allow you to check "I am flexible with my dates" or a similar option. Is there any way to also search more broadly for location?
For example, if you wanted to leave from YYZ or YKF and arrive at any airport in California, can a search for such flights be done somehow?
I ask because when I plan plane trips, I want the lowest price. I'm OK with leaving a day or two later if I save $200 (same with the return trip). There are 3 airports within 80 km of me, I'll leave from the one with the cheapest flight. And I'm also OK with changing the trip to spend time exploring San Francisco instead of lying on the beach near San Diego, and that sort of thing.
Normally this would take dozens of searches, but I'd like to see it all at once.