In 1928, a round trip transatlantic ticket went for $3,000, worth about $40,000 in today’s dollars.
"Although the Graf could achieve a top airspeed of 128 km/h (80 mph, 70 knots) at its maximum thrust of 2,650 horsepower (1,980 kW), its normal operational airspeed was 117 km/h (73 mph, 63 knots)...