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.
I’ve just stuck with Kayak for over a decade, love the -/+3-day price grid.
Sometimes they send you to cheap-o bargain agencies/re-sellers you’ve never heard of… but I haven’t had a bad result yet.
Google flights give you a whole month price grid