<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by BizJet:
FWIW, this is the "loophole" that recently allowed BA to switch their BWI service from LGW to LHR, since it is covered under Washington, D.C.</font>
Actually, this is a somewhat confusing loophole. Specifically, NYC includes JFK and EWR, WAS includes IAD and BWI, but SFO does NOT include SJC or OAK for the purpose of LHR access - however it DOES include them for the purpose of service. Go figure.