Nonstop flight route between Alpena, Michigan, United States and Thorne Bay, Alaska, United States:
Departure Airport:
(45°4'41"N by 83°33'37"W)
Arrival Airport:
(55°41'17"N by 132°32'12"W)
Distance from APN to KTB:
2,225.34 miles (3,581.33 km)
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- About this route
- APN Airport Information
- KTB Airport Information
- Facts about APN
- Facts about KTB
- Map of Nearest Airports to APN
- List of Nearest Airports to APN
- Map of Furthest Airports from APN
- List of Furthest Airports from APN
- Map of Nearest Airports to KTB
- List of Nearest Airports to KTB
- Map of Furthest Airports from KTB
- List of Furthest Airports from KTB
About this route:
A direct, nonstop flight between Alpena County Regional Airport (APN), Alpena, Michigan, United States and Thorne Bay Seaplane Base (KTB), Thorne Bay, Alaska, United States would travel a Great Circle distance of 2,225 miles (or 3,581 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 Alpena County Regional Airport and Thorne Bay Seaplane Base, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | APN / KAPN |
| Airport Name: | Alpena County Regional Airport |
| Location: | Alpena, Michigan, United States |
| GPS Coordinates: | 45°4'41"N by 83°33'37"W |
| Area Served: | Alpena, Michigan |
| Operator/Owner: | County of Alpena |
| Airport Type: | Public |
| Elevation: | 690 feet (210 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from APN |
| More Information: | APN Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | KTB / |
| Airport Name: | Thorne Bay Seaplane Base |
| Location: | Thorne Bay, Alaska, United States |
| GPS Coordinates: | 55°41'17"N by 132°32'12"W |
| Area Served: | Thorne Bay, Alaska |
| Operator/Owner: | State of Alaska DOT&PF - Southeast Region |
| Airport Type: | Public |
| Elevation: | 0 feet (0 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from KTB |
| More Information: | KTB Maps & Info |
Facts about Alpena County Regional Airport (APN):
- Alpena County Regional Airport (APN) has 2 runways.
- Because of Alpena County Regional Airport's relatively low elevation of 690 feet, planes can take off or land at Alpena County 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.
- Alpena County Regional Airport covers an area of 3,084 acres at an elevation of 690 feet above mean sea level.
- The closest airport to Alpena County Regional Airport (APN) is Oscoda-Wurtsmith Airport (OSC), which is located 44 miles (71 kilometers) S of APN.
- The furthest airport from Alpena County Regional Airport (APN) is Margaret River Airport (MGV), which is located 11,184 miles (17,999 kilometers) away in Margaret River, Western Australia, Australia.
Facts about Thorne Bay Seaplane Base (KTB):
- Because of Thorne Bay Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Thorne 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.
- As per Federal Aviation Administration records, the airport had 2,640 passenger boardings in calendar year 2008, 2,283 enplanements in 2009, and 2,608 in 2010.
- The closest airport to Thorne Bay Seaplane Base (KTB) is Hollis Clark Bay Seaplane Base (HYL), which is located only 14 miles (23 kilometers) SSW of KTB.
- Thorne Bay Seaplane Base (KTB) currently has only 1 runway.
- The furthest airport from Thorne Bay Seaplane Base (KTB) is Port Alfred Airport (AFD), which is located 10,618 miles (17,088 kilometers) away in Port Alfred, South Africa.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 44.04 miles (70.88 km) S | Oscoda-Wurtsmith Airport (OSC) | Oscoda, Michigan, United States |     |
| 2 | 55.98 miles (90.09 km) W | Gaylord Regional Airport (GLR) | Gaylord, Michigan, United States | |
| 3 | 64.96 miles (104.55 km) N | Drummond Island Airport (DRE) | Drummond Island, Michigan, United States | |
| 4 | 69.04 miles (111.11 km) WNW | Pellston Regional Airport of Emmet County (PLN) | Pellston, Michigan, United States | |
| 5 | 73.56 miles (118.38 km) NE | Gore Bay-Manitoulin Airport (YZE) | Gore Bay, Ontario, Canada | |
| 6 | 73.74 miles (118.67 km) SW | Roscommon County - Blodgett Memorial Airport (HTL) | Houghton Lake, Michigan, United States | |
| 7 | 75.36 miles (121.28 km) NW | Mackinac Island Airport (MCD) | Mackinac Island, Michigan, United States | |
| 8 | 80.22 miles (129.10 km) W | Antrim County Airport (ACB) | Bellaire, Michigan, United States | |
| 9 | 88.80 miles (142.91 km) SSW | Gladwin Zettel Memorial Airport (GDW) | Gladwin, Michigan, United States | |
| 10 | 92.23 miles (148.43 km) NNW | Chippewa County International Airport (CIU) | Sault Ste Marie, Michigan, United States | |
| 11 | 92.23 miles (148.43 km) NNW | Kincheloe Air Force Base (INR) | Sault Ste. Marie, Michigan, United States | |
| 12 | 97.97 miles (157.67 km) ENE | Manitowaning/Manitoulin East Municipal Airport (YEM) | Manitowaning, Ontario, Canada | |
| 13 | 100.33 miles (161.47 km) NNE | Elliot Lake Municipal Airport (YEL) | Elliot Lake, Ontario, Canada | |
| 14 | 101.63 miles (163.56 km) WSW | Cherry Capital Airport (TVC) | Traverse City, Michigan, United States | |
| 15 | 106.84 miles (171.94 km) WSW | Wexford County Airport (CAD) | Cadillac, Michigan, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,183.86 miles (17,998.64 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,159.81 miles (17,959.93 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,155.62 miles (17,953.18 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,133.52 miles (17,917.63 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 11,112.93 miles (17,884.49 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 6 | 11,071.60 miles (17,817.97 km) SW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 7 | 11,064.65 miles (17,806.79 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 8 | 11,062.42 miles (17,803.20 km) SW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 9 | 11,051.09 miles (17,784.96 km) SW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 11,002.05 miles (17,706.05 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 10,932.92 miles (17,594.78 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 10,906.39 miles (17,552.10 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 13 | 10,886.68 miles (17,520.37 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 14 | 10,885.60 miles (17,518.63 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,878.99 miles (17,507.99 km) WSW | Esperance Airport (EPR) | Esperance, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 14.06 miles (22.63 km) SSW | Hollis Clark Bay Seaplane Base (HYL) | Hollis, Alaska, United States | |
| 2 | 22.34 miles (35.96 km) WSW | Klawock Airport (KLW) | Klawock, Alaska, United States | |
| 3 | 25.34 miles (40.79 km) NNW | Coffman Cove Seaplane Base (KCC) | Coffman Cove, Alaska, United States | |
| 4 | 27.90 miles (44.90 km) WSW | Craig Seaplane Base (CGA) | Craig, Alaska, United States | |
| 5 | 29.09 miles (46.82 km) WNW | Naukati Bay Seaplane Base (WNC) | Tuxekan Island, Alaska, United States | |
| 6 | 35.17 miles (56.60 km) WNW | Tokeen Seaplane Base (TKI) | Tokeen, Alaska, United States | |
| 7 | 35.19 miles (56.63 km) SSW | Hydaburg Seaplane Base (HYG) | Hydaburg, Alaska, United States | |
| 8 | 37.27 miles (59.99 km) NW | North Whale Seaplane Base (WWP) | North Whale Pass, Alaska, United States | |
| 9 | 38.70 miles (62.28 km) SW | Waterfall Seaplane Base (KWF) | Waterfall, Alaska, United States | |
| 10 | 39.68 miles (63.87 km) SE | Ketchikan International Airport (KTN) | Ketchikan, Alaska, United States | |
| 11 | 41.60 miles (66.95 km) SE | Ketchikan Harbor Seaplane Base (WFB) | Ketchikan, Alaska, United States | |
| 12 | 53.80 miles (86.58 km) SE | Metlakatla Seaplane Base (MTM) | Metlakatla, Annette Island, Alaska, United States | |
| 13 | 55.40 miles (89.16 km) N | Wrangell Airport (WRG) | Wrangell, Alaska, United States | |
| 14 | 58.51 miles (94.17 km) SE | Annette Island Airport (ANN) | Annette Island, Alaska, United States | |
| 15 | 60.66 miles (97.62 km) NW | Port Protection Seaplane Base (PPV) | Port Protection, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,618.12 miles (17,088.17 km) SE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 2 | 10,611.06 miles (17,076.80 km) SE | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 3 | 10,609.57 miles (17,074.40 km) SE | East London Airport (ELS) | East London, South Africa | |
| 4 | 10,536.12 miles (16,956.21 km) SE | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 5 | 10,529.16 miles (16,945.00 km) SSE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 6 | 10,521.15 miles (16,932.11 km) SE | George Airport (GRJ) | George, South Africa | |
| 7 | 10,464.33 miles (16,840.66 km) SSE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 8 | 10,451.86 miles (16,820.59 km) SSE | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 9 | 10,430.04 miles (16,785.47 km) SE | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 10 | 10,425.95 miles (16,778.90 km) SSE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 11 | 10,414.65 miles (16,760.71 km) SE | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 12 | 10,413.17 miles (16,758.33 km) SE | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 13 | 10,403.14 miles (16,742.18 km) SE | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 14 | 10,400.12 miles (16,737.33 km) SE | Mokhotlong Airport (MKH) | Mokhotlong, Lesotho | |
| 15 | 10,391.75 miles (16,723.87 km) SE | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |