fuel usage

[rick2519]

Ok guys, I know many of you are big iron users and I have a question about fuel usage in big stuff. How many gallons would a British Airways 747 burn on a Seattle to London flight? How about something smaller like a 767 Seattle to Miami? Are the smaller jets any more economical?

Suddenly thinking 'green' here so don't fret about a wrong answer. BTW, a Piper PA-18-95 gets 19 miles per gallon and a J-3 Cub gets 18.

Will the new 787 be any better? Got a guess?

Thanks,
Rick