Nonstop flight route between Hillsboro / Portland, Oregon, United States and Monrovia, Liberia:

About this route:

A direct, nonstop flight between Portland-Hillsboro Airport (HIO), Hillsboro / Portland, Oregon, United States and Roberts International Airport Roberts Field (ROB), Monrovia, Liberia would travel a Great Circle distance of 6,975 miles (or 11,225 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-Hillsboro Airport 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-Hillsboro Airport 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-Hillsboro Airport (HIO):

• Portland-Hillsboro Airport (HIO) has 2 runways.
• With the outbreak of World War II in 1941, the city received federal money again, plus the city approved local financing to improve the airport again, with the costs of the improvements totaling around $600,000.
• The furthest airport from Portland-Hillsboro Airport (HIO) is Tôlanaro Airport (FTU), which is located 10,913 miles (17,563 kilometers) away in Tôlanaro, Madagascar.
• The airport was originally Hillsboro's municipal airport, which the Port of Portland bought in 1966.
• As of 2006, the Port of Portland planned to spend $134 million through 2025 to improve the Hillsboro facility.
• The closest airport to Portland-Hillsboro Airport (HIO) is Portland International Airport (PDX), which is located only 17 miles (28 kilometers) E of HIO.
• Facilities include a 6,600-foot runway, a 4,049-foot runway, and an FAA control tower.
• Because of Portland-Hillsboro Airport's relatively low elevation of 204 feet, planes can take off or land at Portland-Hillsboro 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.

Facts about Roberts International Airport Roberts Field (ROB):

• On 5 September 2010, Delta launched once weekly flights between Atlanta and Monrovia.
• Presently, daily commercial traffic consists of only one or two arrivals.
• 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 closest airport to Roberts International Airport Roberts Field (ROB) is Spriggs Payne Airport (MLW), which is located 27 miles (44 kilometers) W of ROB.
• 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.
• In October 2012, start-up airline Gambia Bird commenced twice-weekly non-stop services between Banjul and Robertsfield with an A319.
• Roberts International Airport Roberts Field (ROB) currently has only 1 runway.
• The story of Robertsfield is consistently intertwined with the history of Pan American World Airways.
• Roberts International Airport, informally known as Robertsfield, is an international airport in the West African nation of Liberia.
• From 1943 to the end of WW2 in 1945, Roberts Field Airport, as it was then known, served as an alternative base for a contingent of 26 Squadron SAAF which flew Vickers Wellington Bombers on anti submarine and convoy escort patrols over the Atlantic.