United Continental Holdings Inc. is steering its pilots away from a remote Canadian airfield sometimes used for diverted planes two weeks after one of its jets marooned about 250 passengers there for hours.

Pilots have long relied on Goose Bay Airport in Newfoundland and Labrador for unplanned stops en route to Asia or Europe, but now the Chicago-based carrier has designated the small airport for emergency landings only, a United spokeswoman said. Pilots facing less-dire situations will be directed to stop at other remote…