Check out the Withings API.
TripIt organizes travel plans into an itinerary that has all of your trip details in one place. Simply forward confirmation emails to [email protected] and TripIt will automatically build an itinerary for your trip that you can access anytime, either online or from a mobile device. With the TripIt API, you can... Add travel information to a TripIt account, enabling: Instant availability of clean, professional looking itineraries accessible on the web or via mobile device Seamless calendar integration via TripIt’s iCal feeds feature Access to many third party productivity applications that use the TripIt API Import travel information from a TripIt traveler’s account, enabling: Seamless email import technology for your customers to add travel plans to your application Insight into a traveler’s entire trip (air, hotel, car, restaurants, meetings, etc.) Outputting travel data to social network applications such as Facebook and LinkedIn
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