O’Hare International Airport is a major international airport that serves the city of Chicago. Since opening in 1944, the airport has grown to become the 4^th busiest, 7^th largest airport in the United States and 9^th busiest worldwide. During the jet age, the airport was renowned for being the busiest for 35 years from 1963 to 1998 earning the nickname “busiest square mile in the world.”

The airport features eight runways, the most out of any airport in the world. The eight runways service the airports four terminals which feature 213 gates. All four terminals cater to both international and domestic flights with United Airlines and American Airlines flying out of terminals 1 and 2 respectively. Despite there being four terminals, there is no terminal 4, with terminals numbered 1 through 3 and 5.

The airport acts as hub for United Airlines and American Airlines as well as another 50 airlines that offer flights to North America, South America, the Caribbean, Europe, Africa, Asia, the Middle East and Oceania. With flights to 214 destinations across all six inhabited continents, the airport is considered to be one of the world’s most connected airports.

Since first pioneering common airport features such as concourses, jet bridges and easy highway to terminal access, the airport continues to improve in order to create the best possible experience for travellers. The scale of the airport may seem overwhelming at first but is surprisingly easy to get around when arriving and departing. All four terminals are connected via walkways or tunnels with terminal 5 easily accessible via the Airport Transit System.

The airport is located 27km from Chicago’s central business district. The CTA Blue Line train is a cost-effective travel option that reaches the city in approximately 45 minutes. More expensive private transfers and rideshare services are also readily available, a more convenient option that reaches the city in approximately the same time.