Chart demonstrates the number of miles earned for a round-trip from New York to Frankfurt in Business Class. Mileage calculation for: American is non-stop on Singapore. British Airways is via London. Delta is non-stop. Lufthansa is non-stop. USAir is via London on British Airways.

As you can see, you'll benefit every time you fly Lufthansa. The miles add up quickly - you'll earn double bonus miles for every paid Business Class flight and triple miles in First Class.