Nonstop flight route between Sidney, Montana, United States and Christmas Island, Kiribati:
Departure Airport:
(47°42'24"N by 104°11'32"W)
Arrival Airport:
(1°59'9"N by 157°20'58"W)
Distance from SDY to CXI:
4,463.61 miles (7,183.47 km)
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Jump to:
- About this route
- SDY Airport Information
- CXI Airport Information
- Facts about SDY
- Facts about CXI
- Map of Nearest Airports to SDY
- List of Nearest Airports to SDY
- Map of Furthest Airports from SDY
- List of Furthest Airports from SDY
- Map of Nearest Airports to CXI
- List of Nearest Airports to CXI
- Map of Furthest Airports from CXI
- List of Furthest Airports from CXI
About this route:
A direct, nonstop flight between Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States and Cassidy International Airport (CXI), Christmas Island, Kiribati would travel a Great Circle distance of 4,464 miles (or 7,183 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 Sidney-Richland Municipal Airport and Cassidy International 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 Sidney-Richland Municipal Airport and Cassidy International Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SDY / KSDY |
| Airport Name: | Sidney-Richland Municipal Airport |
| Location: | Sidney, Montana, United States |
| GPS Coordinates: | 47°42'24"N by 104°11'32"W |
| Area Served: | Sidney, Montana |
| Operator/Owner: | Sidney Richland Airport Authority |
| Airport Type: | Public |
| Elevation: | 1985 feet (605 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from SDY |
| More Information: | SDY Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | CXI / PLCH |
| Airport Name: | Cassidy International Airport |
| Location: | Christmas Island, Kiribati |
| GPS Coordinates: | 1°59'9"N by 157°20'58"W |
| Area Served: | Kiritimati |
| Operator/Owner: | Government |
| Airport Type: | Public |
| Elevation: | 5 feet (2 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from CXI |
| More Information: | CXI Maps & Info |
Facts about Sidney-Richland Municipal Airport (SDY):
- Sidney-Richland Municipal Airport (SDY) has 2 runways.
- As per the Federal Aviation Administration, this airport had 2,031 passenger boardings in calendar year 2008, 2,766 in 2009, and 3,659 in 2010.
- The furthest airport from Sidney-Richland Municipal Airport (SDY) is Sir Gaëtan Duval Airport (RRG), which is located 10,383 miles (16,711 kilometers) away in Rodrigues Island, Mauritius.
- The closest airport to Sidney-Richland Municipal Airport (SDY) is Sloulin Field International Airport (ISN), which is located 41 miles (67 kilometers) NE of SDY.
Facts about Cassidy International Airport (CXI):
- The closest airport to Cassidy International Airport (CXI) is Manihiki Island Airport (MHX), which is located 891 miles (1,433 kilometers) SSW of CXI.
- The furthest airport from Cassidy International Airport (CXI) is Ikela Airport (IKL), which is nearly antipodal to Cassidy International Airport (meaning Cassidy International Airport is almost on the exact opposite side of the Earth from Ikela Airport), and is located 12,367 miles (19,903 kilometers) away in Ikela, Democratic Republic of the Congo.
- Because of Cassidy International Airport's relatively low elevation of 5 feet, planes can take off or land at Cassidy 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.
- Cassidy International Airport (CXI) currently has only 1 runway.
- The airport is at an elevation of 5ft above mean sea level.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 41.33 miles (66.52 km) NE | Sloulin Field International Airport (ISN) | Williston, North Dakota, United States |     |
| 2 | 48.66 miles (78.31 km) SW | Dawson Community Airport (GDV) | Glendive, Montana, United States | |
| 3 | 69.41 miles (111.70 km) WNW | L. M. Clayton Airport (OLF) | Wolf Point, Montana, United States | |
| 4 | 76.29 miles (122.77 km) NNW | Sher-Wood Airport (PWD) | Plentywood, Montana, United States | |
| 5 | 90.57 miles (145.76 km) SE | Dickinson Theodore Roosevelt Regional Airport (DIK) | Dickinson, North Dakota, United States | |
| 6 | 111.04 miles (178.70 km) SSE | Bowman Municipal Airport (BWM) | Bowman, North Dakota, United States | |
| 7 | 117.38 miles (188.91 km) WNW | Glasgow International Airport (GGW) | Glasgow, Montana, United States | |
| 8 | 118.10 miles (190.06 km) NNE | Estevan Regional Aerodrome (YEN) | Estevan, Saskatchewan, Canada | |
| 9 | 118.99 miles (191.50 km) SW | Miles City Airport (MLS) | Miles City, Montana, United States | |
| 10 | 131.42 miles (211.49 km) W | Jordan Airport (JDN) | Jordan, Montana, United States | |
| 11 | 139.74 miles (224.89 km) ENE | Minot Air Force Base (MIB) | Minot, North Dakota, United States | |
| 12 | 140.05 miles (225.38 km) ENE | Minot International Airport (MOT) | Minot, North Dakota, United States | |
| 13 | 174.07 miles (280.14 km) ESE | Bismarck Municipal Airport (BIS) | Bismarck, North Dakota, United States | |
| 14 | 189.51 miles (304.99 km) N | Regina International Airport (YQR) | Regina, Saskatchewan, Canada | |
| 15 | 191.53 miles (308.24 km) NNW | CFB Moose Jaw (YMJ) | Moose Jaw, Saskatchewan, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,383.49 miles (16,710.57 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,297.57 miles (16,572.29 km) SE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,290.39 miles (16,560.74 km) SE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,266.41 miles (16,522.14 km) SE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,218.50 miles (16,445.05 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,203.17 miles (16,420.36 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,179.29 miles (16,381.94 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,169.42 miles (16,366.06 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 9 | 10,153.64 miles (16,340.65 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 10 | 10,120.11 miles (16,286.69 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 11 | 10,113.85 miles (16,276.63 km) ESE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 12 | 10,100.83 miles (16,255.67 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 13 | 10,089.33 miles (16,237.15 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 14 | 10,078.56 miles (16,219.83 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 15 | 10,076.48 miles (16,216.49 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 890.56 miles (1,433.22 km) SSW | Manihiki Island Airport (MHX) | Manihiki Island, Cook Islands | |
| 2 | 1,044.58 miles (1,681.09 km) WSW | Canton Island Airport (CIS) | Canton Island, Kiribati | |
| 3 | 1,229.76 miles (1,979.10 km) N | Kona International Airport at Keāhole (KOA) | Kailua / Kona, Hawaii, United States | |
| 4 | 1,235.14 miles (1,987.75 km) N | Hilo International Airport (ITO) | Hilo, Hawaii, United States | |
| 5 | 1,238.50 miles (1,993.17 km) N | Pōhakuloa Training Area (BSF) | Camp Pohakuloa, Hawaii, United States | |
| 6 | 1,249.90 miles (2,011.52 km) N | Waimea-Kohala Airport (MUE) | Kamuela, Hawaii, United States | |
| 7 | 1,266.96 miles (2,038.97 km) N | Upolu Airport (UPP) | Hawi, Hawaii, United States | |
| 8 | 1,299.19 miles (2,090.84 km) N | Lanai Airport (LNY) | Lanai City, Hawaii, United States | |
| 9 | 1,302.72 miles (2,096.52 km) N | Hana Airport (HNM) | Hana, Hawaii, United States | |
| 10 | 1,305.95 miles (2,101.72 km) SSE | Mataiva Airport (MVT) | Mataiva, French Polynesia | |
| 11 | 1,308.19 miles (2,105.33 km) N | Kahului Airport (OGG) | Kahului, Hawaii, United States | |
| 12 | 1,311.97 miles (2,111.41 km) N | Kapalua Airport (JHM) | Lahaina, Hawaii, United States | |
| 13 | 1,312.77 miles (2,112.69 km) NW | Johnston Atoll Airport (JON) | Johnston Atoll, U.S. Minor Outlying Islands | |
| 14 | 1,319.03 miles (2,122.77 km) SSE | Maupiti Airport (MAU) | Maupiti, Leeward Islands, French Polynesia | |
| 15 | 1,324.40 miles (2,131.41 km) N | Molokai Airport (MKK) | Kaunakakai, Hawaii, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,367.09 miles (19,902.85 km) SW | Ikela Airport (IKL) | Ikela, Democratic Republic of the Congo | |
| 2 | 12,324.95 miles (19,835.04 km) SSW | Lodja Airport (LJA) | Lodja, Democratic Republic of the Congo | |
| 3 | 12,267.24 miles (19,742.16 km) SE | Boende Airport (BNB) | Boende, Democratic Republic of the Congo | |
| 4 | 12,225.17 miles (19,674.45 km) SSW | Lusambo Airport (LBO) | Lusambo, Democratic Republic of the Congo | |
| 5 | 12,214.69 miles (19,657.59 km) SE | Basongo Airport (BAN) | Basongo, Democratic Republic of the Congo | |
| 6 | 12,207.64 miles (19,646.24 km) SSW | Yangambi Airport (YAN) | Yangambi, Democratic Republic of the Congo | |
| 7 | 12,202.38 miles (19,637.78 km) WSW | Kindu Airport (KND) | Kindu, Democratic Republic of the Congo | |
| 8 | 12,184.71 miles (19,609.34 km) SW | Bangoka International Airport (FKI) | Kisangani, Democratic Republic of the Congo | |
| 9 | 12,182.00 miles (19,604.97 km) E | Basango Mboliasa Airport (KRZ) | Kiri, Democratic Republic of the Congo | |
| 10 | 12,166.09 miles (19,579.37 km) S | Kananga Airport (KGA) | Kananga, Democratic Republic of the Congo | |
| 11 | 12,144.17 miles (19,544.10 km) SSW | Mbuji Mayi Airport (MJM) | Mbuji Mayi, Democratic Republic of the Congo | |
| 12 | 12,140.82 miles (19,538.70 km) SE | Idiofa Airport (IDF) | Idiofa, Democratic Republic of the Congo | |
| 13 | 12,139.66 miles (19,536.84 km) SE | Basankusu Airport (BSU) | Basankusu, Democratic Republic of the Congo | |
| 14 | 12,138.75 miles (19,535.38 km) NNE | Lisala Airport (LIQ) | Lisala, Democratic Republic of the Congo | |
| 15 | 12,135.41 miles (19,530.00 km) E | Inongo Airport (INO) | Inongo, Democratic Republic of the Congo | |