Google has now a "Flights Search".

Marcos Marado - 2016-07-14T19:27:53+0100 - Updated: 2016-07-14T19:27:53+0100

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Marcos Marado - 2016-07-14T21:13:38+0100

Oops, seems that this is very old news, but somehow google search never pointed me out to it in the past.