Nonstop flight route between Southend, Essex (near London) United Kingdom and Salmon, Idaho, United States:

About this route:

A direct, nonstop flight between London Southend Airport (SEN), Southend, Essex (near London) United Kingdom and Lemhi County Airport (SMN), Salmon, Idaho, United States would travel a Great Circle distance of 4,706 miles (or 7,574 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 London Southend Airport and Lemhi County 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 London Southend Airport and Lemhi County 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 London Southend Airport (SEN):

• British World Airlines was based at Southend, previously they operated as British Air Ferries, and before that, as British United Air Ferries – formed from the merger of Channel Air Bridge and Silver City Airways.
• London Southend Airport (SEN) currently has only 1 runway.
• London Southend Airport handled 969,912 passengers last year.
• The airport is located between Rochford and Southend town centres, 1.5 NM north of Southend, in the county of Essex, 36 miles to the east of central London.
• BKS commenced airline operations from Southend Airport in October 1951 as BKS Aero Charter with a Douglas DC-3.
• The furthest airport from London Southend Airport (SEN) is Chatham Islands (CHT), which is located 11,885 miles (19,126 kilometers) away in Waitangi, Chatham Islands, New Zealand.
• Southend was voted the best airport in Britain by the consumer group Which?
• Because of London Southend Airport's relatively low elevation of 55 feet, planes can take off or land at London Southend 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.
• Southend Airport has an excellent weather record and is used by airlines as a diversion alternative when adverse weather or incidents close other London airports.
• The closest airport to London Southend Airport (SEN) is Rochester Airport (RCS), which is located only 17 miles (28 kilometers) SSW of SEN.
• East Anglian Flying Services moved to Southend on 5 January 1947, their first scheduled service being a Southend—Rochester feeder service.

Facts about Lemhi County Airport (SMN):

• Because of Lemhi County Airport's high elevation of 4,043 feet, planes must typically fly at a faster airspeed in order to takeoff or land at SMN. Combined with a high temperature, this could make SMN a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
• The furthest airport from Lemhi County Airport (SMN) is Tôlanaro Airport (FTU), which is located 10,686 miles (17,197 kilometers) away in Tôlanaro, Madagascar.
• The closest airport to Lemhi County Airport (SMN) is Challis Airport (CHL), which is located 45 miles (72 kilometers) SSW of SMN.
• Lemhi County Airport (SMN) currently has only 1 runway.