Nonstop flight route between Portland, Oregon, United States and St. Mary's, Alaska, United States:
Departure Airport:
(45°32'57"N by 122°24'3"W)
Arrival Airport:
(62°3'38"N by 163°18'6"W)
Distance from TTD to KSM:
1,970.52 miles (3,171.24 km)
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Jump to:
- About this route
- TTD Airport Information
- KSM Airport Information
- Facts about TTD
- Facts about KSM
- Map of Nearest Airports to TTD
- List of Nearest Airports to TTD
- Map of Furthest Airports from TTD
- List of Furthest Airports from TTD
- Map of Nearest Airports to KSM
- List of Nearest Airports to KSM
- Map of Furthest Airports from KSM
- List of Furthest Airports from KSM
About this route:
A direct, nonstop flight between Portland-Troutdale Airport (TTD), Portland, Oregon, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 1,971 miles (or 3,171 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 Portland-Troutdale Airport and St. Mary's Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | TTD / KTTD |
| Airport Name: | Portland-Troutdale Airport |
| Location: | Portland, Oregon, United States |
| GPS Coordinates: | 45°32'57"N by 122°24'3"W |
| Area Served: | Portland, Oregon |
| Operator/Owner: | Port of Portland |
| Airport Type: | Public |
| Elevation: | 39 feet (12 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from TTD |
| More Information: | TTD Maps & Info |
Arrival 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 |
Facts about Portland-Troutdale Airport (TTD):
- Because of Portland-Troutdale Airport's relatively low elevation of 39 feet, planes can take off or land at Portland-Troutdale 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.
- Portland-Troutdale Airport (TTD) currently has only 1 runway.
- The closest airport to Portland-Troutdale Airport (TTD) is Portland International Airport (PDX), which is located only 10 miles (16 kilometers) WNW of TTD.
- The furthest airport from Portland-Troutdale Airport (TTD) is Tôlanaro Airport (FTU), which is located 10,901 miles (17,543 kilometers) away in Tôlanaro, Madagascar.
- The airport was purchased by the Port of Portland in 1942, serving as a reliever airport for nearby Portland International Airport until the 1950s.
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 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.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 9.88 miles (15.90 km) WNW | Portland International Airport (PDX) | Portland, Oregon, United States |     |
| 2 | 26.56 miles (42.74 km) W | Portland-Hillsboro Airport (HIO) | Hillsboro / Portland, Oregon, United States | |
| 3 | 26.73 miles (43.02 km) ENE | Cascade Locks State Airport (CZK) | Cascade Locks, Oregon, United States | |
| 4 | 46.01 miles (74.04 km) NNW | Southwest Washington Regional Airport (KLS) | Kelso, Washington, United States | |
| 5 | 53.03 miles (85.34 km) SSW | McNary Field (SLE) | Salem, Oregon, United States | |
| 6 | 59.86 miles (96.33 km) E | Columbia Gorge Regional Airport (DLS) | The Dalles, Oregon, United States | |
| 7 | 66.99 miles (107.81 km) NNW | South Lewis County Airport (TDO) | Toledo, Washington, United States | |
| 8 | 79.53 miles (127.99 km) WSW | Pacific City State Airport (PFC) | Pacific City, Oregon, United States | |
| 9 | 82.60 miles (132.94 km) WNW | Astoria Regional Airport (AST) | Astoria, Oregon, United States | |
| 10 | 84.66 miles (136.25 km) SSW | Corvallis Municipal Airport (CVO) | Corvallis, Oregon, United States | |
| 11 | 85.92 miles (138.27 km) SE | Madras Municipal AirportMadras Army Airfield (MDJ) | Madras, Oregon, United States | |
| 12 | 100.99 miles (162.53 km) NNW | Olympia Regional Airport (OLM) | Olympia, Washington, United States | |
| 13 | 104.97 miles (168.94 km) SW | Newport Municipal Airport (ONP) | Newport, Oregon, United States | |
| 14 | 106.04 miles (170.66 km) N | Gray Army Airfield (GRF) | Tacoma, Washington, United States | |
| 15 | 106.38 miles (171.20 km) SSW | Eugene Airport (EUG) | Eugene, Oregon, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,901.01 miles (17,543.43 km) SSE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 10,827.90 miles (17,425.77 km) SSE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 3 | 10,758.30 miles (17,313.76 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,728.90 miles (17,266.45 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,701.21 miles (17,221.88 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 6 | 10,674.94 miles (17,179.61 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 7 | 10,668.54 miles (17,169.31 km) SSE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 8 | 10,656.44 miles (17,149.84 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 9 | 10,639.73 miles (17,122.95 km) ESE | East London Airport (ELS) | East London, South Africa | |
| 10 | 10,630.20 miles (17,107.61 km) ESE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 11 | 10,628.09 miles (17,104.21 km) ESE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 12 | 10,626.99 miles (17,102.44 km) SSE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 13 | 10,624.69 miles (17,098.73 km) SSW | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 14 | 10,617.76 miles (17,087.58 km) ESE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 15 | 10,613.89 miles (17,081.35 km) ESE | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 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 | |