Chicago O'Hare International Airport (IATA: ORD, ICAO: KORD, FAA LID: ORD), also known as O'Hare Airport, Chicago International Airport, Chicago O'Hare or simply O'Hare, is an international airport located on the Far Northwest Side of Chicago, Illinois, United States, 17 miles (27 km) northwest of the Loop. It is the primary airport serving the Chicago area, with Midway Airport, about 10 miles (16 km) closer to the Loop, serving as a secondary airport. It is operated by the City of Chicago Department of Aviation. Most of O'Hare Airport is in Cook County, but a section of the southwest part of the airport is in DuPage County. The airport is located within a section of the City of Chicago contiguously connected to the rest of the city via a narrow strip of land about 200 ft (61 m) wide, running along Foster Avenue, from the Des Plaines River to the airport. This land was annexed into the city limits in the 1950s to assure the massive tax revenues associated with the airport would go to the city. The strip is bounded on the north by Rosemont and the south by Schiller Park.

An international airport is an airport that offers customs and immigration facilities for passengers travelling between countries. International airports are typically larger than domestic airports and often feature longer runways and facilities to accommodate the heavier aircraft commonly used for international and intercontinental travel. International airports often also host domestic flights. Some, such as Frankfurt Airport in Germany are very large; others such as Fa'a'ā International Airport in Tahiti, are quite small.

Buildings, operations and management have become increasingly sophisticated since the mid 20th century, when international airports began to provide infrastructure for international civilian flights. Detailed technical standards have been developed to ensure safety and common coding systems implemented to provide global consistency. The physical structures that serve millions of individual passengers and flights are among the most complex and interconnected in the world. By the second decade of the 21st century, there were over 1,200 international airports and almost two billion international passengers along with 50 million metric tonnes of cargo were passing through them annually.

Memphis International Airport (IATA: MEM, ICAO: KMEM, FAA LID: MEM) is a civil-military airport seven miles (11.2 km) southeast of downtown Memphis, in Shelby County, Tennessee.

Memphis International Airport is home to the FedEx Express global hub, which processes many of the company's packages. Nonstop FedEx destinations from Memphis include cities across the continental United States, Europe, Middle East, Asia and South America. From 1993 to 2009 Memphis had the largest cargo operations of any airport worldwide. MEM dropped into second position in 2010, behind Hong Kong; however, it remained the busiest cargo airport in the United States.

As of 2014, Memphis International Airport had a passenger count of 3.75 million, up slightly from the 2014 year.Delta Air Lines dropped Memphis as a hub airport after continually reducing flights following its 2008 merger with Northwest Airlines. As of July 2014 MEM averaged 83 total passenger flights per day on all of the airlines serving the city. The airport has since added several airlines, including Southwest, Frontier, and Allegiant, which has increased competition among the carriers. Since Delta's departure as a hub operation, average round trip prices have declined significantly. The July–September 2014 quarter alone saw a 4.7% decline from the quarter a year earlier.

Philadelphia International Airport (IATA: PHL, ICAO: KPHL, FAA LID: PHL), often referred to just by its IATA code PHL, is a major airport in Philadelphia, Pennsylvania, United States, and is the largest airport in the Delaware Valley region and in the state. The airport is a major international hub for American Airlines and a regional cargo hub for UPS Airlines. The airport has service to destinations in the United States, Canada, the Caribbean, Latin America, Europe and the Middle East. Most of the airport property is located in Philadelphia proper. The international terminal and the western end of the airfield are located in Tinicum Township, Delaware County.

History

Starting in 1925 the Pennsylvania National Guard used the PHL site (known as Hog Island) as a training airfield. The site was dedicated as the "Philadelphia Municipal Airport" by Charles Lindbergh in 1927, but it had no proper terminal building until 1940; airlines used the airfield (at 39°55′48″N 75°04′41″W / 39.930°N 75.078°W / 39.930; -75.078) in nearby Camden, New Jersey. Once Philadelphia's terminal was completed (on the east side of the field) American, Eastern, TWA and United began flights.