<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by SkiAdcock:
I strongly recommend the Courtyard Marriott. It's about a 5-10minute ride from the airport. I was in the same situation last year as you; arrived mid-evening & had to be at the airport the next morning. I got a great rate (65, 75 euro that included tax - something like that) on the Marriott website. Shuttle to/from the airport was free, included full buffet breakfast and newspaper, and if you're part of the Marriott program you get points. If I'm ever in this situation again, that's my default hotel there.</font>
I stayed there regularly, too, and can confirm SkiAdcock's comments. Some pictures & a short report about this property (official name is misleading "Courtyard Frankfurt Messe")
Picture report on stays in AMS, FKB, FRA, HDB, MUC, VIE