Nonstop flight route between Portland, Maine, United States and Monrovia, Liberia:

About this route:

A direct, nonstop flight between Portland International Jetport (PWM), Portland, Maine, United States and Roberts International Airport Roberts Field (ROB), Monrovia, Liberia would travel a Great Circle distance of 4,436 miles (or 7,139 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 Portland International Jetport and Roberts International Airport Roberts Field, 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 Portland International Jetport and Roberts International Airport Roberts Field. 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 Portland International Jetport (PWM):

• Boston-Maine Airways had a monopoly on passenger air travel at Portland, which continued after the airline was renamed Northeast Airlines.
• Portland International Jetport (PWM) has 2 runways.
• The closest airport to Portland International Jetport (PWM) is Naval Air Station Brunswick (NHZ), which is located 25 miles (40 kilometers) NE of PWM.
• On June 7, 2007 AirTran Airways began seasonal service to Baltimore-Washington, and to Orlando, Florida.
• The furthest airport from Portland International Jetport (PWM) is Margaret River Airport (MGV), which is located 11,705 miles (18,838 kilometers) away in Margaret River, Western Australia, Australia.
• 1986 also brought US Airways, who began flights to Philadelphia and Pittsburgh.
• In 1980 the passenger terminal expanded to the east with the addition of two baggage carousels.
• Because of Portland International Jetport's relatively low elevation of 76 feet, planes can take off or land at Portland International Jetport 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.
• 1987 saw the arrival of Continental Airlines, when the airline bought PEOPLExpress and took over their routes.

Facts about Roberts International Airport Roberts Field (ROB):

• Roberts International Airport Roberts Field (ROB) currently has only 1 runway.
• The airport is clearly the nation's busiest most important aviation facility, with the only connections to Europe and the United States.
• In 1942, Liberia signed a Defense Pact with the United States.
• The closest airport to Roberts International Airport Roberts Field (ROB) is Spriggs Payne Airport (MLW), which is located 27 miles (44 kilometers) W of ROB.
• Roberts International Airport Roberts Field handled 133,656 passengers last year.
• Because of Roberts International Airport Roberts Field's relatively low elevation of 31 feet, planes can take off or land at Roberts International Airport Roberts Field 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.
• The furthest airport from Roberts International Airport Roberts Field (ROB) is Nauru International Airport (INU), which is nearly antipodal to Roberts International Airport Roberts Field (meaning Roberts International Airport Roberts Field is almost on the exact opposite side of the Earth from Nauru International Airport), and is located 12,001 miles (19,314 kilometers) away in Yaren, Nauru.
• On 5 September 2010, Delta launched once weekly flights between Atlanta and Monrovia.