Nonstop flight route between Hollis, Alaska, United States and Alton, Illinois, United States:
Departure Airport:
(55°29'26"N by 132°37'24"W)
Arrival Airport:
(38°53'25"N by 90°2'45"W)
Distance from HYL to ALN:
2,255.28 miles (3,629.52 km)
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- About this route
- HYL Airport Information
- ALN Airport Information
- Facts about HYL
- Facts about ALN
- Map of Nearest Airports to HYL
- List of Nearest Airports to HYL
- Map of Furthest Airports from HYL
- List of Furthest Airports from HYL
- Map of Nearest Airports to ALN
- List of Nearest Airports to ALN
- Map of Furthest Airports from ALN
- List of Furthest Airports from ALN
About this route:
A direct, nonstop flight between Hollis Clark Bay Seaplane Base (HYL), Hollis, Alaska, United States and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 2,255 miles (or 3,630 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 relatively short distance between Hollis Clark Bay Seaplane Base and St. Louis Regional Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | HYL / |
| Airport Name: | Hollis Clark Bay Seaplane Base |
| Location: | Hollis, Alaska, United States |
| GPS Coordinates: | 55°29'26"N by 132°37'24"W |
| Area Served: | Hollis, Alaska |
| Operator/Owner: | State of Alaska DOT&PF - Southeastern Region |
| Airport Type: | Public |
| Elevation: | 0 feet (0 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from HYL |
| More Information: | HYL Maps & Info |
Arrival 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 |
Facts about Hollis Clark Bay Seaplane Base (HYL):
- The furthest airport from Hollis Clark Bay Seaplane Base (HYL) is Port Alfred Airport (AFD), which is located 10,631 miles (17,108 kilometers) away in Port Alfred, South Africa.
- Hollis Clark Bay Seaplane Base (HYL) currently has only 1 runway.
- The closest airport to Hollis Clark Bay Seaplane Base (HYL) is Thorne Bay Seaplane Base (KTB), which is located only 14 miles (23 kilometers) NNE of HYL.
- Because of Hollis Clark Bay Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Hollis Clark Bay 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.
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.
- The 2,250 acres airfield sits at 544 ft MSL.
- 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.
- West Star Aviation is the largest fixed base operations company at the airport.
- 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.
- St. Louis Regional Airport (ALN) has 2 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 14.06 miles (22.63 km) NNE | Thorne Bay Seaplane Base (KTB) | Thorne Bay, Alaska, United States |     |
| 2 | 18.72 miles (30.13 km) WNW | Klawock Airport (KLW) | Klawock, Alaska, United States | |
| 3 | 20.54 miles (33.05 km) W | Craig Seaplane Base (CGA) | Craig, Alaska, United States | |
| 4 | 21.22 miles (34.15 km) SSW | Hydaburg Seaplane Base (HYG) | Hydaburg, Alaska, United States | |
| 5 | 27.77 miles (44.70 km) WSW | Waterfall Seaplane Base (KWF) | Waterfall, Alaska, United States | |
| 6 | 34.21 miles (55.05 km) NW | Naukati Bay Seaplane Base (WNC) | Tuxekan Island, Alaska, United States | |
| 7 | 37.00 miles (59.55 km) ESE | Ketchikan International Airport (KTN) | Ketchikan, Alaska, United States | |
| 8 | 37.13 miles (59.75 km) NNW | Coffman Cove Seaplane Base (KCC) | Coffman Cove, Alaska, United States | |
| 9 | 38.99 miles (62.75 km) ESE | Ketchikan Harbor Seaplane Base (WFB) | Ketchikan, Alaska, United States | |
| 10 | 41.25 miles (66.38 km) NW | Tokeen Seaplane Base (TKI) | Tokeen, Alaska, United States | |
| 11 | 47.37 miles (76.23 km) NNW | North Whale Seaplane Base (WWP) | North Whale Pass, Alaska, United States | |
| 12 | 48.03 miles (77.30 km) ESE | Metlakatla Seaplane Base (MTM) | Metlakatla, Annette Island, Alaska, United States | |
| 13 | 51.69 miles (83.18 km) SE | Annette Island Airport (ANN) | Annette Island, Alaska, United States | |
| 14 | 69.37 miles (111.64 km) N | Wrangell Airport (WRG) | Wrangell, Alaska, United States | |
| 15 | 69.38 miles (111.66 km) NNW | Port Protection Seaplane Base (PPV) | Port Protection, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,630.60 miles (17,108.25 km) SE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 2 | 10,623.24 miles (17,096.40 km) SE | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 3 | 10,622.28 miles (17,094.86 km) SE | East London Airport (ELS) | East London, South Africa | |
| 4 | 10,549.11 miles (16,977.11 km) SE | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 5 | 10,542.45 miles (16,966.38 km) SSE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 6 | 10,532.64 miles (16,950.61 km) SE | George Airport (GRJ) | George, South Africa | |
| 7 | 10,477.78 miles (16,862.32 km) SSE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 8 | 10,465.22 miles (16,842.10 km) SSE | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 9 | 10,443.15 miles (16,806.57 km) SE | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 10 | 10,439.56 miles (16,800.80 km) SSE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 11 | 10,427.72 miles (16,781.75 km) SE | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 12 | 10,426.19 miles (16,779.29 km) SE | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 13 | 10,413.80 miles (16,759.35 km) SE | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 14 | 10,413.33 miles (16,758.59 km) SE | Mokhotlong Airport (MKH) | Mokhotlong, Lesotho | |
| 15 | 10,404.65 miles (16,744.63 km) SE | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 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 | |