Flying isn't just for luxury. In my previous job, I was sent to client sites, a week at a time, for about 60% of the year. I flew 2ish weeks a month every month

Flying isn't just for luxury. In my previous job, I was sent to client sites, a week at a time, for about 60% of the year. I flew 2ish weeks a month every month for years. Because of the above, I demanded to only fly Delta, and I got the Amex Skymiles credit card. I built status, and often, got free upgrades to First Class. Another "not-a-luxury" thing. When you're boarding and you walk by all the First Class passengers, most of them are there on their company's dime, and nearly all got a free upgrade or paid a highly reduced rate. The AMEX SkyMiles Credit Card also pays for your PreCheck or Global Entry. So even that was "free" for me (depending how you define 'free' and 'credit cards')