Nonstop flight route between Thorne Bay, Alaska, United States and Alert, Nunavut, Canada:
Departure Airport:
(55°41'17"N by 132°32'12"W)
Arrival Airport:
(82°31'4"N by 62°16'50"W)
Distance from KTB to YLT:
2,242.93 miles (3,609.63 km)
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- About this route
- KTB Airport Information
- YLT Airport Information
- Facts about KTB
- Facts about YLT
- Map of Nearest Airports to KTB
- List of Nearest Airports to KTB
- Map of Furthest Airports from KTB
- List of Furthest Airports from KTB
- Map of Nearest Airports to YLT
- List of Nearest Airports to YLT
- Map of Furthest Airports from YLT
- List of Furthest Airports from YLT
About this route:
A direct, nonstop flight between Thorne Bay Seaplane Base (KTB), Thorne Bay, Alaska, United States and Alert Airport (YLT), Alert, Nunavut, Canada would travel a Great Circle distance of 2,243 miles (or 3,610 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 Thorne Bay Seaplane Base and Alert Airport, the route shown on this map most likely still appears to be a straight line.
Departure 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 |
Arrival Airport Information:
| IATA / ICAO Codes: | YLT / CYLT |
| Airport Name: | Alert Airport |
| Location: | Alert, Nunavut, Canada |
| GPS Coordinates: | 82°31'4"N by 62°16'50"W |
| Operator/Owner: | DND/1CdnAirDiv Alert AMO Ottawa |
| Airport Type: | Military |
| Elevation: | 100 feet (30 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from YLT |
| More Information: | YLT Maps & Info |
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.
- 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.
- 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.
Facts about Alert Airport (YLT):
- Because of Alert Airport's relatively low elevation of 100 feet, planes can take off or land at Alert 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 closest airport to Alert Airport (YLT) is Eureka Aerodrome (YEU), which is located 299 miles (481 kilometers) WSW of YLT.
- Alert Airport (YLT) currently has only 1 runway.
- A weather station was established on the site in 1950, and in 1957 construction began on the military facilities which are still in use to this day.
- The airport's fire and rescue operations are supported by a 2012 KME/Fort Garry Fire Truck ARFF.
- The furthest airport from Alert Airport (YLT) is Teniente Rodolfo Marsh Airport (TNM), which is located 9,999 miles (16,092 kilometers) away in Villa Las Estrellas, Antarctica.
| 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 | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 299.01 miles (481.20 km) WSW | Eureka Aerodrome (YEU) | Eureka, Nunavut, Canada | |
| 2 | 341.28 miles (549.24 km) SSW | Siorapaluk Heliport (SRK) | Siorapaluk, Greenland | |
| 3 | 420.80 miles (677.21 km) SSW | Thule Air Base (THU) | Pituffik, Greenland | |
| 4 | 450.21 miles (724.54 km) S | Savissivik Heliport (SVR) | Savissivik, Greenland | |
| 5 | 488.58 miles (786.29 km) SW | Grise Fiord Airport (YGZ) | Grise Fiord, Nunavut, Canada | |
| 6 | 552.32 miles (888.87 km) S | Kullorsuaq Heliport (KHQ) | Kullorsuaq, Greenland | |
| 7 | 584.90 miles (941.31 km) S | Nuussuaq Heliport (NSQ) | Nuussuaq, Greenland | |
| 8 | 637.28 miles (1,025.60 km) S | Tasiusaq Heliport (TQA) | Tasiusaq, Qaasuitsup, Greenland | |
| 9 | 649.23 miles (1,044.84 km) S | Innaarsuit Heliport (IUI) | Innaarsuit, Greenland | |
| 10 | 671.56 miles (1,080.77 km) SSE | Aappilattoq Heliport (AOQ) | Aappilattoq, Qaasuitsup, Greenland | |
| 11 | 677.28 miles (1,089.98 km) S | Upernavik Airport (JUV) | Upernavik, Greenland | |
| 12 | 679.40 miles (1,093.39 km) WSW | Resolute Bay Airport (YRB) | Resolute, Nunavut, Canada | |
| 13 | 706.55 miles (1,137.07 km) SSE | Kangersuatsiaq Heliport (KGQ) | Kangersuatsiaq, Greenland | |
| 14 | 711.77 miles (1,145.48 km) SSW | Pond Inlet Airport (YIO) | Pond Inlet, Nunavut, Canada | |
| 15 | 723.97 miles (1,165.12 km) SW | Nanisivik Airport (YSR) | Nanisivik, Nunavut, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 9,999.10 miles (16,091.96 km) S | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |
| 2 | 9,764.46 miles (15,714.33 km) WSW | Ryan's Creek Aerodrome (SZS) | Stewart Island, New Zealand | |
| 3 | 9,729.61 miles (15,658.24 km) WSW | Invercargill Airport (IVC) | Invercargill, New Zealand | |
| 4 | 9,682.13 miles (15,581.84 km) WSW | Dunedin International Airport (DUD) | Dunedin, Otago, New Zealand | |
| 5 | 9,639.62 miles (15,513.42 km) WSW | Alexandra Aerodrome (ALR) | Alexandra, New Zealand | |
| 6 | 9,631.45 miles (15,500.28 km) WSW | Queenstown Airport (ZQN) | Queenstown, New Zealand | |
| 7 | 9,617.77 miles (15,478.26 km) SW | Hobart International Airport (HBA) | Hobart, Tasmania, Australia | |
| 8 | 9,613.87 miles (15,471.99 km) WSW | Milford Sound Airport (MFN) | Milford Sound, New Zealand | |
| 9 | 9,609.93 miles (15,465.64 km) WSW | Oamaru Airport (OAM) | Oamaru, North Otago, New Zealand | |
| 10 | 9,607.21 miles (15,461.27 km) WSW | Wanaka Airport (WKA) | Wanaka, New Zealand | |
| 11 | 9,563.29 miles (15,390.59 km) WSW | Richard Pearse Airport (Timaru Airport) (TIU) | Timaru, New Zealand | |
| 12 | 9,544.76 miles (15,360.76 km) WSW | Glentanner Aerodrome (GTN) | Mount Cook, New Zealand | |
| 13 | 9,535.15 miles (15,345.31 km) WSW | Mount Cook Airport (MON) | Mount Cook, New Zealand | |
| 14 | 9,531.57 miles (15,339.54 km) WSW | Ashburton Aerodrome (ASG) | Ashburton, New Zealand | |
| 15 | 9,530.41 miles (15,337.68 km) SSW | Launceston Airport (LST) | Launceston, Tasmania, Australia | |