Since purchasing a condo in the Chicago area (a year ago) I have traveled back and forth to Arizona more than 6 times. I am overly cautious and am like a crazy lady in the airport. Here are a few tips: Double mask or mask with face shield. If I can, I purchase first class seats - using my miles. If not, I choose a window seat away from the aisle where everyone passes. In the airport, I wear plastic gloves and carry a zip lock bag of wipes with me. I try to arrive at the airport with as little time possible without missing my flight - check how busy the airport is, etc. Checking my bags outside helps - if that's available to you. I carry an empty water bottle and fill it up inside the airport. Not bought bottles.
I often bring along snacks as well. Social distancing through security checkpoints can become an issue. If you set the example and stay six feet back from the person in front of you, hopefully he folks behind you will see and follow. I used to bring an umbrella and carry it over my shoulder and no one wanted to be poked in the eye behind me.
I wipe down my luggage after retrieving it from the carousel. i have not become ill from any of my flights.