Nonstop flight route between SeaTac (near Seattle and Tacoma), Washington, United States and Ratmalana, Sri Lanka:
Departure Airport:

Arrival Airport:

Distance from SEA to RML:
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- About this route
- SEA Airport Information
- RML Airport Information
- Facts about SEA
- Facts about RML
- Map of Nearest Airports to SEA
- List of Nearest Airports to SEA
- Map of Furthest Airports from SEA
- List of Furthest Airports from SEA
- Map of Nearest Airports to RML
- List of Nearest Airports to RML
- Map of Furthest Airports from RML
- List of Furthest Airports from RML
About this route:
A direct, nonstop flight between Seattle–Tacoma International Airport (SEA), SeaTac (near Seattle and Tacoma), Washington, United States and Ratmalana Airport (RML), Ratmalana, Sri Lanka would travel a Great Circle distance of 8,449 miles (or 13,598 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 Seattle–Tacoma International Airport and Ratmalana 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 Seattle–Tacoma International Airport and Ratmalana Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | SEA / KSEA |
Airport Names: |
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Location: | SeaTac (near Seattle and Tacoma), Washington, United States |
GPS Coordinates: | 47°26'56"N by 122°18'33"W |
Area Served: | Seattle; Tacoma, Washington, US |
Airport Type: | Public |
Elevation: | 433 feet (132 meters) |
# of Runways: | 3 |
View all routes: | Routes from SEA |
More Information: | SEA Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | RML / VCCC |
Airport Names: |
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Location: | Ratmalana, Sri Lanka |
GPS Coordinates: | 6°49'19"N by 79°53'10"E |
Area Served: | Colombo |
Operator/Owner: | Sri Lankan Government |
Airport Type: | Public / Military |
Elevation: | 16 feet (5 meters) |
# of Runways: | 1 |
View all routes: | Routes from RML |
More Information: | RML Maps & Info |
Facts about Seattle–Tacoma International Airport (SEA):
- A new control tower was built beginning in 2001 and opened November 2004, at a cost of $26 million.
- Seattle–Tacoma International Airport handled 34,776,666 passengers last year.
- Seattle–Tacoma International Airport (SEA) has 3 runways.
- The two-story North Concourse added four new gate positions and a new wing 600 feet long and 30 feet wide.
- The furthest airport from Seattle–Tacoma International Airport (SEA) is Tôlanaro Airport (FTU), which is located 10,781 miles (17,350 kilometers) away in Tôlanaro, Madagascar.
- Seattle's Central Link light-rail line serves the airport at the SeaTac/Airport Station, which opened on December 19, 2009.
- A recurring problem at the airport is misidentification of the westernmost taxiway, Taxiway Tango, as a runway.
- The new 3rd runway opened on November 20, 2008, with a total construction cost of $1.1 billion.
- In addition to being known as "Seattle–Tacoma International Airport", another name for SEA is "Sea–Tac Airport".
- The closest airport to Seattle–Tacoma International Airport (SEA) is Renton Municipal Airport (RNT), which is located only 5 miles (9 kilometers) NE of SEA.
- Because of Seattle–Tacoma International Airport's relatively low elevation of 433 feet, planes can take off or land at Seattle–Tacoma International 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 Ratmalana Airport (RML):
- In addition to being known as "Ratmalana Airport", another name for RML is "රත්මලාන ගුවන්තොටුපළஇரத்மலானை விமான நிலைய".
- The furthest airport from Ratmalana Airport (RML) is Seymour Airport (GPS), which is located 11,628 miles (18,713 kilometers) away in Baltra Island, Galápagos Islands, Ecuador.
- Because of Ratmalana Airport's relatively low elevation of 16 feet, planes can take off or land at Ratmalana 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.
- The closest airport to Ratmalana Airport (RML) is Bandaranaike International Airport (CMB), which is located 25 miles (40 kilometers) N of RML.
- There are currently 2 terminals at the airport.
- Ratmalana Airport (RML) currently has only 1 runway.
- Ratmalana airport at one time had the country's main air terminal, with the Douglas DC-3 Dakota and Lockheed Constellation aeroplanes of Air Ceylon flying out of it.
- On 11 August 1952, 3 months after the inaugural service of a passenger jet aircraft, BOAC began its Comet service between Colombo and London.