If you can't find any, I would recommend black lighting or setting a trap for queen ants.
For blacklighting, all you need is a blacklight and a white sheet on a dark night, from there just wait and queen ants, along with lots of other insects will be attracted to the sheet, and you can catch the queen ants their
For setting up a trap for queen ants, you can get some bricks or rocks or something and put them on some moist dirt in your front or backyard, check on them every couple days and make sure to mist underneath them every once in a while. Sometimes a queen ant will make her claustral chamber under the rocks or stuff and then you can just grab her.
Some other anting tips though is that queen ants aren't amazing fliers so they don't tend to fly on windy days. They also tend to fly the most on warm, calm days, the day or two after a rainstorm. This is also, like other people have said before, early in the anting season and depending on your area queen ants may not be flying yet.