How Much Does It Cost To Fuel A Commercial Airliner?
The return journey north to Chicago costs more fuel (almost 1,000 gallons more), believed to be due to the congestion of landing at a major airport. A good estimation is that a narrowbody aircraft like the Boeing 737 operates at around $1,500 per hour.
Source: How Much Does It Cost To Fuel A Commercial Airliner? – Simple Flying