TripIt
Used by 12 peopletripit.com ↗

“I've tried to use TripIt but I hate the interface.”
Simon Wistow Interview, Co-founder (Fastly) · via Uses This 
“For travel, I've used TripIt Pro for a long time and it continues to (sloooowly) get incrementally more useful (that being said, TSA Pre, Global Entry, and an APEC card give a lot more bang for your buck on the travel convenience front).”
Leonard Lin Interview, Independent technologist · via Uses This 
“TripIt rocks for tracking your all your travel information: flights, hotels, and rental cars.”
Matt Cutts Interview, Head of Google's webspam team · via Uses This 
“For conferences and guest lectures, I use OpenOffice Impress to create slides, and TripIt to manage my travel plans.”
Jessica Hammer Interview, Game psychologist, designer · via Uses This