The best way to cross the pond in economy is to take Airbus A380 double-deck Superjumbo. There are only few A380 routes between Europe and USA/Canada:
— Emirates Airline: Milan (MXP) – New York (JFK) EK92
— Singapore Airlines: Frankfurt (FRA) – New York (JFK) SQ25
— Air France : Paris (CDG) – New York (JFK) AF6/7
— Air France : Paris (CDG) – Los Angeles (LAX) AF66/67
— Air France : Paris (CDG) – San Francisco (SFO) AF84/83
— Air France : Paris (CDG) – Miami (MIA) AF90/99 (seasonal)
— Air France : Paris (CDG) – Washington DC (IAD) AF054/055, AF28, AF39
— Lufthansa: Frankfurt (FRA) – New York (JFK) LH400/401
— Lufthansa: Frankfurt (FRA) – Los Angeles (LAX) LH456/457
— Lufthansa: Frankfurt (FRA) – San Francisco (SFO) LH454/455
— Lufthansa: Frankfurt (FRA) – Houston (IAH) LH440/441
— British Airways: London (LHR) – Washington (IAD) BA217/216
— British Airways: London (LHR) – San Francisco (SFO) BA287/286
— British Airways: London (LHR) – Miami (MIA) BA209/208
from May 1st 2016
— British Airways: London (LHR) — Vancouver (YVR), BA85/84
Build your trip at http://flystein.com and mention #A380