Flights.google appears to have the same problem as the rest:

* Awful, text list of flights. I want a way to visualize the options, to wisely choose from many options.

* Subset of the airlines. Google still has Delta at least, which has disappeared from Hipmunk and some others. But no Southwest.

I thought their map / explore view was pretty good, actually [0]

Also I really like the flexible dates view [1]

Shame about Southwest for sure, but I think that's more on Southwest than anyone else (do they list their flights on any aggregator? I remember hearing somewhere that's part of their shtick is that they don't)

[0] http://imgur.com/GqRVfUG [1] http://imgur.com/Npnu7uU

Southwest doesn't share their data.

Ryanair doesn't share their data neither but I guess some websites (Kayak) scrap it.

I never bother with anything but Google Flights and it listed Ryanair last time I checked two weeks ago.