(So Cal Metro)Airports have long been the domain of taxi cabs, limos, and licensed car services. Ride-sharing services haven’t really been able to break that stronghold, though some have tried. But travelers to one of America’s busiest airports may soon have new options as a result of a new arrangement between United Airlines and Uber. United launched the service Thursday that allows passengers to use the United Airlines mobile app to find UberTaxi information including the types of vehicles available, estimated wait times and prices. The airline’s passengers can hook-up with the Uber service by using the airline’s mobile app to select a ride, at which point they are either directed to the Uber app to complete the transaction or to sign-up for an Uber account. While ride-sharing services such as Uber, Lyft and Sidecar are banned from picking up passengers at most airports, United found a loophole in the Windy City, Crain’s Chicago Business reports. UberTaxi is permitted at O’Hare International Airport and Midway Airport, because the service links to professional taxi drivers and Uber dispatches the licensed cabs themselves.