I use skyscanner and skiplagged for my initial searches, then book direct on an airlines website if i’m able to. Just curious what other sites you all are using these days. I will say that recently I have noticed that sometimes the airlines own website has cheaper fares than these aggregators seem to find. Maybe its because they only crawl every so often, and I’ve caught price drops on the airlines website before the aggregators picked them up.
Google flights, flight matrix, and skyscanner. I also browse deals on Secret Flying, and Flyer Talk forums.