Urgh this is too  convenient, if they’re close, he knew she was on that plane and is a liar if he says otherwise. Have a serious conversation when he’s back.

I think when things are fine, you both need to come to an understanding of how to resolve your issues, saying that.. understand that being left alone for a while rather than fighting isn’t a bad idea. Just let him know ow you feel about it, talking during a disagreement doesn’t always mean fighting.