Originally Posted by
ijgordon
AA codeshares on JFK-NRT with Japan Airlines, a route that both serve with their own metal. Further, the fact that CO will be operating EWR-LHR does not inherently preclude the codeshare arrangement, since it is much broader than just EWR-LHR.
The codeshare is both ways as well. VS customers may wish to book on CO flights because of schedule, availability, connection, etc.