Hot take: I flew to Denver with just a personal item and spent $0 on bags, but the real win was the $8 bus
I booked a $59 one way flight to Denver two months back and decided to skip the $35 carry on fee by packing everything in a backpack. The catch was getting from the airport to my friend's place in Capitol Hill, and I almost paid $45 for a rideshare until a guy at the gate told me about the RTD A Line train. That train plus a transfer cost me $8 round trip and took about 50 minutes, which beat sitting in traffic anyway. I did the same thing in Chicago a few weeks later with the Blue Line for $5 and it worked just as well. The lesson for me was that airport trains are the single biggest money saver on a trip and almost nobody talks about them. What's your go to cheap airport to city trick, or have you gotten burned by a train that stopped running at night?