Logan Square is a subway station on the Chicago Transit Authority's 'L' system, serving the Blue Line and the Logan Square neighborhood. It was the terminus of the Blue Line until it was extended along the Kennedy Expressway to the Jefferson Park stop in 1970 and to O'Hare Airport in 1984. From Logan Square, trains run at intervals of 2–7 minutes during rush-hour periods, and take 14 minutes to travel to the Loop. O'Hare bound trains take 26 minutes to reach the airport.