Was to fly SEA-SFO-ORD. Missed my flight, so I was very nice with the GA and she put me on the SEA-ORD flight leaving 15min later. In E+ with a empty row. We were given priority as we had kidneys on bored for a transplant (Call sign United 1210 Lifeguard) so I got into ORD several hours early. Took the rest of the afternoon off and had a great night out in ORD.