A few statistics.
We have 70,000 air flights worldwide every day...some half of those are domestic US flights, leaving every major city every few minutes, usually with plenty of empty seats, each carrying 10-25,000 gallons of JP4 (or such), burning 3-4,000 gph, Now we have the new monster Airbus carrying 68,000 gals of fuel!
QE II's Fuel Consumption: 18.05 tons per hour, or 433 tons per day (144,333 gals/day). Every day's operation would run 15,000 average SUV's for a day.