Nonstop flight route between St. Mary's, Alaska, United States and Watson Lake, Yukon, Canada:
Departure Airport:
(62°3'38"N by 163°18'6"W)
Arrival Airport:
(60°6'59"N by 128°49'20"W)
Distance from KSM to YQH:
1,145.66 miles (1,843.76 km)
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Jump to:
- About this route
- KSM Airport Information
- YQH Airport Information
- Facts about KSM
- Facts about YQH
- Map of Nearest Airports to KSM
- List of Nearest Airports to KSM
- Map of Furthest Airports from KSM
- List of Furthest Airports from KSM
- Map of Nearest Airports to YQH
- List of Nearest Airports to YQH
- Map of Furthest Airports from YQH
- List of Furthest Airports from YQH
About this route:
A direct, nonstop flight between St. Mary's Airport (KSM), St. Mary's, Alaska, United States and Watson Lake Airport (YQH), Watson Lake, Yukon, Canada would travel a Great Circle distance of 1,146 miles (or 1,844 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 St. Mary's Airport and Watson Lake Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | KSM / PASM |
| Airport Name: | St. Mary's Airport |
| Location: | St. Mary's, Alaska, United States |
| GPS Coordinates: | 62°3'38"N by 163°18'6"W |
| Operator/Owner: | Alaska DOT&PF |
| Airport Type: | Public |
| Elevation: | 312 feet (95 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from KSM |
| More Information: | KSM Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | YQH / CYQH |
| Airport Name: | Watson Lake Airport |
| Location: | Watson Lake, Yukon, Canada |
| GPS Coordinates: | 60°6'59"N by 128°49'20"W |
| Operator/Owner: | Government of Yukon |
| Airport Type: | Public |
| Elevation: | 2255 feet (687 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from YQH |
| More Information: | YQH Maps & Info |
Facts about St. Mary's Airport (KSM):
- Because of St. Mary's Airport's relatively low elevation of 312 feet, planes can take off or land at St. Mary's 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 St. Mary's Airport (KSM) is Mountain Village Airport (MOU), which is located only 13 miles (20 kilometers) W of KSM.
- St. Mary's Airport (KSM) has 2 runways.
- The furthest airport from St. Mary's Airport (KSM) is Cape Town International Airport (CPT), which is located 10,494 miles (16,889 kilometers) away in Cape Town, South Africa.
Facts about Watson Lake Airport (YQH):
- Watson Lake Airport (YQH) currently has only 1 runway.
- The closest airport to Watson Lake Airport (YQH) is Dease Lake Airport (YDL), which is located 125 miles (201 kilometers) SSW of YQH.
- The furthest airport from Watson Lake Airport (YQH) is Port Alfred Airport (AFD), which is located 10,299 miles (16,574 kilometers) away in Port Alfred, South Africa.
- Passenger service was also provided in the mid 1990s by several regional and commuter airlines such as Central Mountain Air flying Beechcraft twin turboprop aircraft and Alkan Air operating Piper Navajo aircraft.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12.52 miles (20.15 km) W | Mountain Village Airport (MOU) | Mountain Village, Alaska, United States |     |
| 2 | 15.71 miles (25.28 km) ESE | Pilot Station Airport (PQS) | Pilot Station, Alaska, United States | |
| 3 | 43.61 miles (70.18 km) ESE | Marshall Don Hunter Sr. Airport (MLL) | Marshall, Alaska, United States | |
| 4 | 58.95 miles (94.87 km) WNW | Sheldon Point Airport (SXP) | Sheldon Point, Alaska, United States | |
| 5 | 61.02 miles (98.20 km) NW | Alakanuk Airport (AUK) | Alakanuk, Alaska, United States | |
| 6 | 62.90 miles (101.24 km) NW | Emmonak Airport (EMK) | Emmonak, Alaska, United States | |
| 7 | 67.40 miles (108.48 km) N | Kotlik Airport (KOT) | Kotlik, Alaska, United States | |
| 8 | 67.43 miles (108.52 km) ESE | Russian Mission Airport (RSH) | Russian Mission, Alaska, United States | |
| 9 | 75.21 miles (121.04 km) W | Scammon Bay Airport (SCM) | Scammon Bay, Alaska, United States | |
| 10 | 83.21 miles (133.91 km) WSW | Chevak Airport (VAK) | Chevak, Alaska, United States | |
| 11 | 84.72 miles (136.35 km) SSE | Nunapitchuk Airport (NUP) | Nunapitchuk, Alaska, United States | |
| 12 | 85.97 miles (138.35 km) SSE | Kasigluk Airport (KUK) | Kasigluk, Alaska, United States | |
| 13 | 88.49 miles (142.42 km) W | Cape Romanzof Air Force Station Cape Romanzof Long Range Radar Site (CZF) | Cape Romanzof, Alaska, United States | |
| 14 | 89.19 miles (143.53 km) SSW | Newtok Airport (WWT) | Newtok, Alaska, United States | |
| 15 | 89.22 miles (143.59 km) SSE | Atmautluak Airport (ATT) | Atmautluak, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,494.08 miles (16,888.54 km) S | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 2 | 10,482.44 miles (16,869.80 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,457.83 miles (16,830.21 km) SSW | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 4 | 10,416.76 miles (16,764.12 km) SSW | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 5 | 10,371.90 miles (16,691.92 km) SSW | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,261.64 miles (16,514.46 km) SSW | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,199.66 miles (16,414.71 km) S | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 8 | 10,195.75 miles (16,408.43 km) SSW | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 9 | 10,169.94 miles (16,366.89 km) S | Aggeneys Airport (AGZ) | Aggeneys, South Africa | |
| 10 | 10,169.94 miles (16,366.89 km) S | Wild Coast Sun Airport (MZF) | Mzamba, South Africa | |
| 11 | 10,157.43 miles (16,346.75 km) SSW | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 12 | 10,151.99 miles (16,338.00 km) SSW | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 13 | 10,149.37 miles (16,333.79 km) SSW | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 14 | 10,143.31 miles (16,324.03 km) SSW | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 15 | 10,133.50 miles (16,308.25 km) SE | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 124.59 miles (200.51 km) SSW | Dease Lake Airport (YDL) | Dease Lake, British Columbia, Canada | |
| 2 | 134.93 miles (217.15 km) W | Teslin Airport (YZW) | Teslin, Yukon, Canada | |
| 3 | 172.47 miles (277.56 km) SSW | Telegraph Creek Airport (YTX) | Telegraph Creek, British Columbia, Canada | |
| 4 | 175.77 miles (282.87 km) NW | Ross River Airport (XRR) | Ross River, Yukon, Canada | |
| 5 | 184.06 miles (296.22 km) E | Fort Liard Airport (YJF) | Fort Liard, Northwest Territories, Canada | |
| 6 | 209.35 miles (336.92 km) NW | Faro Airport (ZFA) | Faro, Yukon, Canada | |
| 7 | 216.85 miles (348.99 km) WNW | Erik Nielsen Whitehorse International Airport (YXY) | Whitehorse, Yukon, Canada | |
| 8 | 223.61 miles (359.87 km) SSW | Bob Quinn Lake Airport (YBO) | Bob Quinn Lake, British Columbia, Canada | |
| 9 | 230.16 miles (370.40 km) W | Skagway Airport (SGY) | Skagway, Alaska, United States | |
| 10 | 235.58 miles (379.12 km) ESE | Northern Rockies Regional Airport (YYE) | Fort Nelson, British Columbia, Canada | |
| 11 | 236.87 miles (381.20 km) WSW | Juneau International Airport (JNU) | Juneau, Alaska, United States | |
| 12 | 241.27 miles (388.28 km) WSW | Haines Airport (HNS) | Haines, Alaska, United States | |
| 13 | 250.43 miles (403.03 km) WSW | Funter Bay Seaplane Base (FNR) | Funter Bay, Alaska, United States | |
| 14 | 251.18 miles (404.23 km) SSW | Bronson Creek Airport (YBM) | Bronson Creek, British Columbia, Canada | |
| 15 | 261.51 miles (420.86 km) WSW | Excursion Inlet Seaplane Base (EXI) | Excursion Inlet, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,298.77 miles (16,574.22 km) SE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 2 | 10,296.16 miles (16,570.02 km) SE | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 3 | 10,286.98 miles (16,555.25 km) SE | East London Airport (ELS) | East London, South Africa | |
| 4 | 10,217.07 miles (16,442.74 km) SE | George Airport (GRJ) | George, South Africa | |
| 5 | 10,209.86 miles (16,431.14 km) SE | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 6 | 10,199.23 miles (16,414.02 km) SE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 7 | 10,132.56 miles (16,306.73 km) SSE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 8 | 10,121.07 miles (16,288.24 km) SE | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 9 | 10,113.28 miles (16,275.70 km) SE | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 10 | 10,102.31 miles (16,258.05 km) SE | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 11 | 10,092.74 miles (16,242.65 km) SSE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 12 | 10,087.37 miles (16,234.01 km) SE | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 13 | 10,086.54 miles (16,232.68 km) SE | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 14 | 10,071.18 miles (16,207.95 km) SE | Mokhotlong Airport (MKH) | Mokhotlong, Lesotho | |
| 15 | 10,066.78 miles (16,200.87 km) SE | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |