Is this a flying ant or termite?

Definitely termites!

Based on the straight antenna, uniform waste I would say termite

wow, good informational grafic.
Im always seeing these things around barns , and i have a bug guys come in twice a year.

I have often wondered how you and engineer can know so much about everything.

I had no idea about telling a male ant from a male termite till I saw Engineers diagram. Complete, eloquent, simply displayed, brilliant!

very spring I go around the bases of my barns (those not made of stone and I SHOVE tongue depressers into the soil and leave em for about a month. I go back and see if anybosy's been munchin on my popicle sticks, then I call my bug guy. In barns the biggest problem is powder post beetles, wood eting bees, and acrobat ants.

Ants have narrow waist and as engender pointed out termites have a straight waste.

Over the years I noticed some interesting gull behavior — there'd be a warm afternoon and the sky would fill with herring gulls and laughing gulls and they looked to be behaving like swallows, catching insects on the wing. A good pair of binoculars showed them doing just that, behavior I didn't expect from gulls. After a few years of making this observation I realized that this was being done on the same afternoon when the flying ants emerged. And eventually I established that was exactly what they were doing! I never knew that this was a thing! They're even known to get intoxicated on the formic acid — don't believe me? Do a search.

like cedr waxwings get relly hammered on crab apples in late winter.

It's definitely termites. We have controlled them many times. This year in my area, too, the winter has been too warm, so I've had constant problems getting bugs and termites out of the house.