(For instance, a longtime rival, British Airways, belongs to Oneworld, letting it share routes with American Airlines).
One of Virgin's issues is its status outside one of the three major alliances in the airline industry, which allow companies to share routes and cut costs.
But the apps also allow runners, walkers and cyclists to compile and retrieve information about their workouts from any device with an Internet connection, and some will publicly share routes that strangers might like to follow.
Morten H. Engelstoft, chief operations officer, said the company had been shedding capacity, using "super-slow steaming," laying up vessels and examining alliances to share routes, as long as they did not violate antitrust rules.
One clash played out recently when the Transportation Department, rejecting many of Ms. Varney's recommendations, approved an antitrust immunity request involving a global alliance of nine airlines; Continental Airlines wanted to join the alliance to share routes, marketing and revenue.
It joins a host of other bike-mapping Web sites, from Bikely, which lets people share routes in cities around the world, to Ride the City, a geowiki (or self-editing map) app, available in 10 cities (including New York, Boston, San Francisco and Toronto) that allows users to edit their routes as they ride, to MapMyRide, which is geared more toward fitness training and logging workouts.
You can store and playback routes and even share routes with friends.
Travelers can plan trips in advance on a regular computer and upload the maps to a mobile device as well as save and share routes.
Foretrex 401 allows you to wirelessly share routes, tracks and waypoints between certain Foretrex, Oregon and Colorado devices, and it is also compatible with Garmin heart-rate monitors and cadence sensors.
Murine typhus and leptospirosis are likely to share routes of transmission in an urban setting where rats are abundant.
