United from the 5th April to 24th May is to begin 787-9 service on its route between San Francisco and London Heathrow. One of their twice daily service will be operated by the 787-9 instead of 747.
UA901 departs SFO at 12:45 and arrives at LHR at 07:10 the following day.
UA900 departs LHR at 10:25 and arrives back at SFO at 13:35.