Question: how fuel efficient are planes?
Answer: A plane like a Boeing 747 uses approximately 1 gallon of fuel (about 4 liters) every second. Over the course of a 10-hour flight, it might burn 36,000 gallons (150,000 liters). ... That means the plane is burning 0.01 gallons per person per mile. In other words, the plane is getting 100 miles per gallon per person!