Nonstop flight route between Fort Sill, Oklahoma, United States and Lisbon, Portugal:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Lisbon Portela Airport (LIS), Lisbon, Portugal would travel a Great Circle distance of 4,742 miles (or 7,632 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Henry Post Army Airfield and Lisbon Portela Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Henry Post Army Airfield and Lisbon Portela Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Henry Post Army Airfield (FSI):

• With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
• After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
• The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
• Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
• Air Service/Corps units assigned to Post Field between 1919 and 1941
• Henry Post Army Airfield (FSI) currently has only 1 runway.
• The furthest airport from Henry Post Army Airfield (FSI) is Sir Gaëtan Duval Airport (RRG), which is located 10,920 miles (17,575 kilometers) away in Rodrigues Island, Mauritius.
• The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
• With the end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
• The closest airport to Henry Post Army Airfield (FSI) is Lawton–Fort Sill Regional Airport (LAW), which is located only 6 miles (9 kilometers) S of FSI.

Facts about Lisbon Portela Airport (LIS):

• The furthest airport from Lisbon Portela Airport (LIS) is New Plymouth Airport (NPL), which is nearly antipodal to Lisbon Portela Airport (meaning Lisbon Portela Airport is almost on the exact opposite side of the Earth from New Plymouth Airport), and is located 12,258 miles (19,727 kilometers) away in New Plymouth, New Zealand.
• The closest airport to Lisbon Portela Airport (LIS) is Beja Airport (BYJ), which is located 81 miles (130 kilometers) SE of LIS.
• Two bicycle paths connect the airport roundabout, situated 300m South of Terminal 1 to the city's 50 km cycle infrastructure network.
• The airport opened on 15 October 1942 during the Second World War.
• In addition to being known as "Lisbon Portela Airport", another name for LIS is "Aeroporto da Portela".
• Lisbon Portela Airport (LIS) has 2 runways.
• Terminal 2 is used by 4 scheduled low-cost flight airlines for departures to European, North Atlantic islands and North African destinations, while Terminal 1 handles all arrivals and regular scheduled and chartered flights from most major European and North American air carriers.
• The selection of Alcochete was announced on 10 January 2008, more than 35 years after the first capacity increase studies were initiated.
• Because of Lisbon Portela Airport's relatively low elevation of 374 feet, planes can take off or land at Lisbon Portela Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• Lisbon Portela Airport handled 16,024,955 passengers last year.
• Along with the airports in Beja, Porto, Faro, Flores, Santa Maria, Ponta Delgada and Horta, the airport's concessions to provide support to civil aviation was conceded to ANA Aeroportos de Portugal on 18 December 1998, under provisions of decree 404/98.