Nonstop flight route between Roundup, Montana, United States and Christiansted, Saint Croix, U.S. Virgin Islands:
Departure Airport:
(46°28'30"N by 108°32'35"W)
Arrival Airport:
(17°44'49"N by 64°42'17"W)
Distance from RPX to SSB:
3,181.30 miles (5,119.79 km)
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Jump to:
- About this route
- RPX Airport Information
- SSB Airport Information
- Facts about RPX
- Facts about SSB
- Map of Nearest Airports to RPX
- List of Nearest Airports to RPX
- Map of Furthest Airports from RPX
- List of Furthest Airports from RPX
- Map of Nearest Airports to SSB
- List of Nearest Airports to SSB
- Map of Furthest Airports from SSB
- List of Furthest Airports from SSB
About this route:
A direct, nonstop flight between Roundup Airport (RPX), Roundup, Montana, United States and Christiansted Harbor Seaplane Base (SSB), Christiansted, Saint Croix, U.S. Virgin Islands would travel a Great Circle distance of 3,181 miles (or 5,120 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 Roundup Airport and Christiansted Harbor Seaplane Base, 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 Roundup Airport and Christiansted Harbor Seaplane Base. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | RPX / KRPX |
| Airport Name: | Roundup Airport |
| Location: | Roundup, Montana, United States |
| GPS Coordinates: | 46°28'30"N by 108°32'35"W |
| Area Served: | Roundup, Montana |
| Operator/Owner: | City of Roundup & Musselshell County |
| Airport Type: | Public |
| Elevation: | 3490 feet (1,064 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from RPX |
| More Information: | RPX Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | SSB / |
| Airport Names: |
|
| Location: | Christiansted, Saint Croix, U.S. Virgin Islands |
| GPS Coordinates: | 17°44'49"N by 64°42'17"W |
| Operator/Owner: | Virgin Islands Port Authority |
| Airport Type: | Private |
| Elevation: | 0 feet (0 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from SSB |
| More Information: | SSB Maps & Info |
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.
- Roundup Airport (RPX) has 2 runways.
- 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.
Facts about Christiansted Harbor Seaplane Base (SSB):
- In addition to being known as "Christiansted Harbor Seaplane Base", other names for SSB include "St. Croix Seaplane Base", "none" and "VI32".
- The furthest airport from Christiansted Harbor Seaplane Base (SSB) is Barrow Island Airport (BWB), which is nearly antipodal to Christiansted Harbor Seaplane Base (meaning Christiansted Harbor Seaplane Base is almost on the exact opposite side of the Earth from Barrow Island Airport), and is located 12,221 miles (19,668 kilometers) away in Barrow Island, Western Australia, Australia.
- Christiansted Harbor Seaplane Base (SSB) currently has only 1 runway.
- Because of Christiansted Harbor Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Christiansted Harbor Seaplane Base 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 Christiansted Harbor Seaplane Base (SSB) is Henry E. Rohlsen International Airport (STX), which is located only 7 miles (11 kilometers) WSW of SSB.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 46.10 miles (74.19 km) S | Billings Logan International Airport (BIL) | Billings, Montana, United States |     |
| 2 | 59.02 miles (94.99 km) NW | Lewistown Municipal Airport (LWT) | Lewistown, Montana, United States | |
| 3 | 95.49 miles (153.67 km) NE | Jordan Airport (JDN) | Jordan, Montana, United States | |
| 4 | 105.84 miles (170.33 km) WSW | Mission Field (LVM) | Livingston, Montana, United States | |
| 5 | 126.53 miles (203.63 km) E | Miles City Airport (MLS) | Miles City, Montana, United States | |
| 6 | 133.88 miles (215.46 km) WSW | Bozeman Yellowstone International Airport (BZN) | Bozeman, Montana, United States | |
| 7 | 137.05 miles (220.56 km) S | Yellowstone Regional Airport (COD) | Cody, Wyoming, United States | |
| 8 | 139.98 miles (225.28 km) SSE | Sheridan County Airport (SHR) | Sheridan, Wyoming, United States | |
| 9 | 143.48 miles (230.90 km) WNW | Malmstrom Air Force Base (GFA) | Great Falls, Montana, United States | |
| 10 | 150.20 miles (241.73 km) NE | Glasgow International Airport (GGW) | Glasgow, Montana, United States | |
| 11 | 150.36 miles (241.97 km) WNW | Great Falls International Airport (GTF) | Great Falls, Montana, United States | |
| 12 | 153.79 miles (247.50 km) NNW | Havre City-County Airport (HVR) | Havre, Montana, United States | |
| 13 | 163.70 miles (263.45 km) W | Helena Regional Airport (HLN) | Helena, Montana, United States | |
| 14 | 175.30 miles (282.12 km) SW | Yellowstone Airport (WYS) | West Yellowstone, Montana, United States | |
| 15 | 175.96 miles (283.18 km) S | Worland Municipal Airport (WRL) | Worland, Wyoming, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,534.71 miles (16,953.93 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,479.36 miles (16,864.85 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,476.57 miles (16,860.37 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 4 | 10,454.31 miles (16,824.54 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,433.23 miles (16,790.61 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,330.91 miles (16,625.95 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,261.65 miles (16,514.48 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,233.41 miles (16,469.03 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,132.24 miles (16,306.22 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 10 | 10,132.23 miles (16,306.21 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 11 | 10,116.24 miles (16,280.48 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,108.66 miles (16,268.28 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,089.56 miles (16,237.54 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,066.19 miles (16,199.92 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,059.04 miles (16,188.42 km) SE | Sainte Marie Airport (SMS) | Île Sainte-Marie, Madagascar | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 7.02 miles (11.29 km) WSW | Henry E. Rohlsen International Airport (STX) | Christiansted, Saint Croix, United States Virgin Islands | |
| 2 | 43.70 miles (70.33 km) NNW | Charlotte Amalie Harbor Seaplane Base (SPB) | Charlotte Amalie, Saint Thomas, U.S. Virgin Islands | |
| 3 | 44.41 miles (71.48 km) NNW | Cyril E. King Airport (STT) | Charlotte Amalie, Saint Thomas, United States Virgin Islands | |
| 4 | 49.41 miles (79.52 km) NNE | Terrance B. Lettsome International Airport (EIS) | Beef Island (near Tortola), British Virgin Islands | |
| 5 | 51.56 miles (82.99 km) NNE | Virgin Gorda Airport (VIJ) | Virgin Gorda, British Virgin Islands | |
| 6 | 55.51 miles (89.33 km) NW | Benjamín Rivera Noriega Airport (CPX) | Isla de Culebra, Puerto Rico | |
| 7 | 58.34 miles (93.90 km) WNW | Antonio Rivera Rodríguez Airport (VQS) | Vieques, Puerto Rico, United States | |
| 8 | 73.85 miles (118.86 km) WNW | Diego Jiménez Torres Airport (FAJ) | Fajardo, Puerto Rico, United States | |
| 9 | 76.93 miles (123.80 km) WNW | Humacao Airport (HUC) | Humacao, Puerto Rico, United States | |
| 10 | 97.68 miles (157.20 km) WNW | Luis Muñoz Marín International Airport (SJU) | San Juan, Puerto Rico | |
| 11 | 97.96 miles (157.66 km) E | Juancho E. Yrausquin Airport (SAB) | Saba, Caribbean Netherlands | |
| 12 | 103.81 miles (167.06 km) WNW | Fernando Luis Ribas Dominicci Airport (SIG) | San Juan, Puerto Rico | |
| 13 | 106.85 miles (171.96 km) E | Princess Juliana International Airport (SXM) | Philipsburg, Sint Maarten, Kingdom of the Netherlands | |
| 14 | 111.58 miles (179.56 km) ENE | L'Espérance Airport Grand Case Airport (CCE) | Saint Martin, Guadeloupe | |
| 15 | 112.95 miles (181.78 km) ENE | Clayton J. Lloyd International Airport (AXA) | The Valley, Anguilla | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,221.20 miles (19,668.07 km) S | Barrow Island Airport (BWB) | Barrow Island, Western Australia, Australia | |
| 2 | 12,210.38 miles (19,650.65 km) SSW | Karratha Airport (KTA) | Karratha / Dampier, Western Australia, Australia | |
| 3 | 12,153.33 miles (19,558.85 km) SW | Port Hedland International Airport (PHE) | Port Hedland, Western Australia, Australia | |
| 4 | 12,116.93 miles (19,500.27 km) SSE | RAAF Learmonth (LEA) | Exmouth, Western Australia, Australia | |
| 5 | 12,114.55 miles (19,496.44 km) SSW | Coolawanyah Station Airport (COY) | Coolawanyah Station, Western Australia, Australia | |
| 6 | 12,086.58 miles (19,451.42 km) SSW | Solomon Airport (SLJ) | Karijini National Park, Western Australia, Australia | |
| 7 | 12,053.25 miles (19,397.78 km) SSW | Tom Price Airport (TPR) | Tom Price, Western Australia, Australia | |
| 8 | 12,029.87 miles (19,360.14 km) SSW | Paraburdoo Airport (PBO) | Paraburdoo, Western Australia, Australia | |
| 9 | 12,013.93 miles (19,334.50 km) SW | Barimunya Airport (BYP) | Barimunya, Western Australia, Australia | |
| 10 | 12,010.63 miles (19,329.19 km) SSW | Coondewanna Airport (CJF) | Coondewanna, Western Australia, Australia | |
| 11 | 11,980.66 miles (19,280.95 km) W | Broome International Airport (BME) | Broome, Western Australia, Australia | |
| 12 | 11,948.52 miles (19,229.23 km) SW | Newman Airport (ZNE) | Newman, Western Australia, Australia | |
| 13 | 11,933.01 miles (19,204.26 km) SSE | Carnarvon Airport (CVQ) | Carnarvon, Western Australia, Australia | |
| 14 | 11,885.15 miles (19,127.25 km) W | Derby Airport (DRB) | Derby, Western Australia, Australia | |
| 15 | 11,863.29 miles (19,092.07 km) S | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |