By Lindsay Rogers “Supply chain issues.” It’s the most highly trafficked explanation for why menu items at your favorite local restaurant are now priced at a premium, no one in their right mind should buy a car right now, you might wind up waiting six months for your new couch, and — thanks to a glass shortage — you’re probably having a hard time chasing down that specific bottle of wine at present. Couple that with the effects of inflation and it feels like you’re paying an arm and a leg for virtually everything … except, inexplicably, airfare. Mercurial by nature, the cost of airfare has rem…