Nonstop flight route between Seletar, Singapore and Roundup, Montana, United States:

About this route:

A direct, nonstop flight between Seletar Airport (XSP), Seletar, Singapore and Roundup Airport (RPX), Roundup, Montana, United States would travel a Great Circle distance of 8,587 miles (or 13,820 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 Seletar Airport and Roundup 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 Seletar Airport and Roundup 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 Seletar Airport (XSP):

• Seletar Airport now operates as a general aviation airport, mainly for chartered flights and training purposes.
• There had been a proposal to extend its runway to 2,000 metres, so as to be able to receive the Boeing 737 used by many budget airlines.
• Because of Seletar Airport's relatively low elevation of 36 feet, planes can take off or land at Seletar 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.
• After World War II, the base went back to the RAF and, in the late 1940s and 1950s, the base was heavily involved in the Malayan Emergency, with Beaufighters, Spitfires and Mosquitos based there while operating against Malayan Communist insurgents.
• With the threat of war in the area, the RAF started building up their forces in the Far East in the late 1930s and early 1940s.
• In December 1966, three Andover CC Mk1 arrived to replace the ageing Vickers Valetta C1 aircraft of 52 Sqn.
• The air base was briefly host to Amy Johnson during May 1930 on her UK - Australia flight in her Gipsy Moth named 'Jason'.
• During the 1960s, RAF Seletar was home base to No's 103 and 110 Squadrons, both of which were equipped with Westland Whirlwind Mk 10 helicopters and to 34 Squadron, which was equipped with Blackburn Beverleys.
• The furthest airport from Seletar Airport (XSP) is Francisco de Orellana Airport (OCC), which is nearly antipodal to Seletar Airport (meaning Seletar Airport is almost on the exact opposite side of the Earth from Francisco de Orellana Airport), and is located 12,348 miles (19,873 kilometers) away in Coca, Ecuador.
• In addition to being known as "Seletar Airport", other names for XSP include "实里达机场" and "செலட்டர் வான்முகம்".
• Seletar Airport (XSP) currently has only 1 runway.
• The closest airport to Seletar Airport (XSP) is Paya Lebar Air Base (PLAB) (QPG), which is located only 5 miles (8 kilometers) SE of XSP.
• Catalina I of 205 Sqn undergoing servicing in their hangar at RAF Seletar.

Facts about Roundup Airport (RPX):

• The closest airport to Roundup Airport (RPX) is Billings Logan International Airport (BIL), which is located 46 miles (74 kilometers) S of RPX.
• The furthest airport from Roundup Airport (RPX) is Sir Gaëtan Duval Airport (RRG), which is located 10,535 miles (16,954 kilometers) away in Rodrigues Island, Mauritius.
• Roundup Airport (RPX) has 2 runways.