Nonstop flight route between Alton, Illinois, United States and Zemio, Central African Republic:
Departure Airport:
(38°53'25"N by 90°2'45"W)
Arrival Airport:
(5°0'6"N by 25°6'7"E)
Distance from ALN to IMO:
7,320.33 miles (11,780.91 km)
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Jump to:
- About this route
- ALN Airport Information
- IMO Airport Information
- Facts about ALN
- Facts about IMO
- Map of Nearest Airports to ALN
- List of Nearest Airports to ALN
- Map of Furthest Airports from ALN
- List of Furthest Airports from ALN
- Map of Nearest Airports to IMO
- List of Nearest Airports to IMO
- Map of Furthest Airports from IMO
- List of Furthest Airports from IMO
About this route:
A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Zemio Airport (IMO), Zemio, Central African Republic would travel a Great Circle distance of 7,320 miles (or 11,781 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 St. Louis Regional Airport and Zemio 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 St. Louis Regional Airport and Zemio Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | ALN / KALN |
| Airport Name: | St. Louis Regional Airport |
| Location: | Alton, Illinois, United States |
| GPS Coordinates: | 38°53'25"N by 90°2'45"W |
| Area Served: | Alton, Illinois |
| Operator/Owner: | St. Louis Regional |
| Airport Type: | Public |
| Elevation: | 544 feet (166 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from ALN |
| More Information: | ALN Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | IMO / FEFZ |
| Airport Name: | Zemio Airport |
| Location: | Zemio, Central African Republic |
| GPS Coordinates: | 5°0'6"N by 25°6'7"E |
| Area Served: | Zemio, Haut-Mbomou, CAR |
| Operator/Owner: | Government |
| Airport Type: | Public |
| Elevation: | 1995 feet (608 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from IMO |
| More Information: | IMO Maps & Info |
Facts about St. Louis Regional Airport (ALN):
- The closest airport to St. Louis Regional Airport (ALN) is Lambert–St. Louis International Airport (STL), which is located only 20 miles (32 kilometers) WSW of ALN.
- Because of St. Louis Regional Airport's relatively low elevation of 544 feet, planes can take off or land at St. Louis Regional 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 2,250 acres airfield sits at 544 ft MSL.
- St. Louis Regional Airport (ALN) has 2 runways.
- The furthest airport from St. Louis Regional Airport (ALN) is Margaret River Airport (MGV), which is located 11,002 miles (17,706 kilometers) away in Margaret River, Western Australia, Australia.
Facts about Zemio Airport (IMO):
- The furthest airport from Zemio Airport (IMO) is Cassidy International Airport (CXI), which is located 11,925 miles (19,192 kilometers) away in Christmas Island, Kiribati.
- Zemio Airport (IMO) currently has only 1 runway.
- The closest airport to Zemio Airport (IMO) is M'Boki Airport (MKI), which is located 61 miles (99 kilometers) ENE of IMO.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 19.64 miles (31.61 km) WSW | Lambert–St. Louis International Airport (STL) | St. Louis, Missouri, United States |     |
| 2 | 22.85 miles (36.78 km) SSW | St. Louis Downtown Airport (CPS) | Cahokia, Illinois (near St. Louis), United States | |
| 3 | 26.41 miles (42.50 km) SSE | MidAmerica St. Louis Airport (BLV) | Belleville, Illinois, United States | |
| 4 | 36.08 miles (58.06 km) E | Greenville Airport (GRE) | Greenville, Illinois, United States | |
| 5 | 36.24 miles (58.32 km) WSW | Spirit of St. Louis Airport (SUS) | Chesterfield, Missouri, United States | |
| 6 | 60.74 miles (97.76 km) ESE | Salem–Leckrone Airport (SLO) | Salem, Illinois, United States | |
| 7 | 68.78 miles (110.69 km) NNE | Abraham Lincoln Capital Airport (SPI) | Springfield, Illinois, United States | |
| 8 | 75.13 miles (120.92 km) ESE | Mt. Vernon Airport (MVN) | Mount Vernon, Illinois, United States | |
| 9 | 88.08 miles (141.75 km) SSE | Southern Illinois Airport (MDH) | Carbondale/Murphysboro, Illinois, United States | |
| 10 | 90.73 miles (146.02 km) NE | Decatur Airport (DEC) | Decatur, Illinois, United States | |
| 11 | 95.12 miles (153.07 km) NW | Quincy Regional Airport (UIN) | Quincy, Illinois, United States | |
| 12 | 96.44 miles (155.20 km) SE | Williamson County Regional Airport (MWA) | Marion, Illinois, United States | |
| 13 | 102.97 miles (165.72 km) ENE | Coles County Memorial Airport (MTO) | Mattoon/Charleston, Illinois, United States | |
| 14 | 107.04 miles (172.27 km) WSW | Rolla National Airport (VIH) | Rolla, Missouri, United States | |
| 15 | 115.57 miles (186.00 km) W | Jefferson City Memorial Airport (JEF) | Jefferson City, Missouri, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,002.15 miles (17,706.21 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,979.99 miles (17,670.53 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 10,957.22 miles (17,633.90 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 10,954.58 miles (17,629.65 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 5 | 10,926.12 miles (17,583.85 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,910.74 miles (17,559.09 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 7 | 10,901.55 miles (17,544.30 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 8 | 10,897.24 miles (17,537.37 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 9 | 10,880.36 miles (17,510.20 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 10 | 10,861.31 miles (17,479.54 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 11 | 10,859.59 miles (17,476.77 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 12 | 10,841.22 miles (17,447.21 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,808.74 miles (17,394.93 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,807.95 miles (17,393.67 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,799.72 miles (17,380.43 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 61.49 miles (98.96 km) ENE | M'Boki Airport (MKI) | Obo, Central African Republic | |
| 2 | 152.35 miles (245.18 km) S | Buta Zega Airport (BZU) | Buta Zega, Democratic Republic of the Congo | |
| 3 | 160.38 miles (258.10 km) W | Bangassou Airport (BGU) | Bangassou, Central African Republic | |
| 4 | 164.51 miles (264.75 km) NW | Yalinga Airport (AIG) | Yalinga, Central African Republic | |
| 5 | 165.42 miles (266.22 km) WNW | Bakouma Airport (BMF) | Bakouma, Central African Republic | |
| 6 | 227.88 miles (366.74 km) SE | Matari Airport (IRP) | Isiro, Democratic Republic of the Congo | |
| 7 | 238.62 miles (384.03 km) WNW | Bria Airport (BIV) | Bria, Central African Republic | |
| 8 | 272.85 miles (439.11 km) NE | Wau Airport (WUU) | Wau, Sudan | |
| 9 | 288.88 miles (464.90 km) W | Gbadolite Airport (BDT) | Gbadolite, Democratic Republic of the Congo | |
| 10 | 293.77 miles (472.78 km) S | Yangambi Airport (YAN) | Yangambi, Democratic Republic of the Congo | |
| 11 | 311.79 miles (501.77 km) W | Bambari Airport (BBY) | Bambari, Central African Republic | |
| 12 | 312.73 miles (503.28 km) S | Bangoka International Airport (FKI) | Kisangani, Democratic Republic of the Congo | |
| 13 | 316.34 miles (509.09 km) SW | Lisala Airport (LIQ) | Lisala, Democratic Republic of the Congo | |
| 14 | 357.68 miles (575.63 km) NW | Koumala Airport (KOL) | Koumala, Central African Republic | |
| 15 | 391.78 miles (630.50 km) NW | Gordil Airport (GDI) | Gordil, Central African Republic | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,925.18 miles (19,191.68 km) SSE | Cassidy International Airport (CXI) | Christmas Island, Kiribati | |
| 2 | 11,877.74 miles (19,115.32 km) SE | Manihiki Island Airport (MHX) | Manihiki Island, Cook Islands | |
| 3 | 11,635.74 miles (18,725.87 km) SSW | Mataiva Airport (MVT) | Mataiva, French Polynesia | |
| 4 | 11,627.19 miles (18,712.10 km) SSW | Maupiti Airport (MAU) | Maupiti, Leeward Islands, French Polynesia | |
| 5 | 11,618.01 miles (18,697.33 km) SSW | Bora Bora Airport (BOB) | Bora Bora, French Polynesia | |
| 6 | 11,587.80 miles (18,648.71 km) SSW | Huahine – Fare Airport (HUH) | Huahine, Society Islands, French Polynesia | |
| 7 | 11,559.52 miles (18,603.20 km) SW | Ahe Airport (AHE) | Ahe, French Polynesia | |
| 8 | 11,550.52 miles (18,588.71 km) SW | Manihi Airport (XMH) | Manihi, French Polynesia | |
| 9 | 11,532.87 miles (18,560.31 km) SW | Arutua Airport (AXR) | Arutua, Tuamotus, French Polynesia | |
| 10 | 11,506.72 miles (18,518.23 km) SW | Apataki Airport (APK) | Apataki, French Polynesia | |
| 11 | 11,506.72 miles (18,518.23 km) SSW | Moorea Airport (MOZ) | Moorea, Windward Islands, French Polynesia | |
| 12 | 11,498.59 miles (18,505.15 km) SSW | Fa'a'ā International Airport (PPT) | Papeete, Tahiti, French Polynesia | |
| 13 | 11,448.95 miles (18,425.26 km) SW | Fakarava Airport (FAV) | Fakarava, Society Islands, French Polynesia | |
| 14 | 11,394.17 miles (18,337.09 km) S | Mitiaro Island Airport (MOI) | Mitiaro Island, Cook Islands | |
| 15 | 11,378.22 miles (18,311.42 km) S | Akatoka Manava Airport (Mauke Airport) (MUK) | Mauke Island, Cook Islands | |