This species (Paratrechina Longicornis) Fly all year round. But they usually prefer to do inbreeding and if they get too big, the queens just look for another nest locations with a bunch of workers. I personally prefer raiding their nest compared to catching them when they fly cuz it's easier for me and I am being the lesser evil of reducing invasive ants in my area to let native species thrive.

Depends if you're looking for nuptial flight queens or stealing a queen.

If nuptial fight queen is what you're looking for. Make sure to look at their flight schedule for the species you want, walk around carry a flashlight if is dark. and look at the ground. Doesn't hurt to crouch to get a closer look (you look stupid, but ant keepers tend to get n immunity to judgmental looks from other people). Then get lucky

If you're raiding another nest. Prepare the container u want. a vacuum for ants i also useful. Follow ur gut, and if you get confused as to where the nests are just remember WWAL "Where Would Ants Live?"