Tip question: I always have tipping guilt! In this situation how much would you have given. Ride from conference hotel to airport prepaid with non-resort service, $75. (Was a work conference)The hotel has a service which costs $117 one way with tip included. There was a mixup when I went to catch my ride and ended up in resort car and we were at the airport before mistake realized. He reduced rate to $60. I had already paid the other company so I ended up paying twice for the ride. He was a really nice driver. How much would you have tipped? It was hard to feel generous when I just paid $135 for a ride to the airport.