Nonstop flight route between Alpena, Michigan, United States and Port Williams, Kodiak Island Borough, Alaska, United States:
Departure Airport:
(45°4'41"N by 83°33'37"W)
Arrival Airport:
(58°29'24"N by 152°34'55"W)
Distance from APN to KPR:
2,945.16 miles (4,739.76 km)
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Jump to:
- About this route
- APN Airport Information
- KPR Airport Information
- Facts about APN
- Facts about KPR
- 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 KPR
- List of Nearest Airports to KPR
- Map of Furthest Airports from KPR
- List of Furthest Airports from KPR
About this route:
A direct, nonstop flight between Alpena County Regional Airport (APN), Alpena, Michigan, United States and Port Williams Seaplane Base (KPR), Port Williams, Kodiak Island Borough, Alaska, United States would travel a Great Circle distance of 2,945 miles (or 4,740 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 large distance between Alpena County Regional Airport and Port Williams Seaplane Base, the route shown on this map most likely appears curved because of this reason.
Try it at home! Get a globe and tightly lay a string between Alpena County Regional Airport and Port Williams Seaplane Base. You'll see that it will travel the same route of the red line on this map!
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: | KPR / |
| Airport Name: | Port Williams Seaplane Base |
| Location: | Port Williams, Kodiak Island Borough, Alaska, United States |
| GPS Coordinates: | 58°29'24"N by 152°34'55"W |
| Area Served: | Port Williams, Alaska |
| Operator/Owner: | Washington Fish & Oyster |
| Airport Type: | Public |
| Elevation: | 0 feet (0 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from KPR |
| More Information: | KPR Maps & Info |
Facts about Alpena County Regional Airport (APN):
- Alpena County Regional Airport is a county-owned, public-use, joint civil-military airport in Alpena County, Michigan, United States.
- 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.
- 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.
- Alpena County Regional Airport (APN) has 2 runways.
Facts about Port Williams Seaplane Base (KPR):
- Port Williams Seaplane Base has one seaplane landing area designated E/W with a water surface measuring 10,000 by 4,000 feet.
- Scheduled passenger service to Kodiak, Alaska, is subsidized by the United States Department of Transportation via the Essential Air Service program.
- Port Williams Seaplane Base is a public use seaplane base located in Port Williams, in the Kodiak Island Borough of the U.S.
- The furthest airport from Port Williams Seaplane Base (KPR) is Port Elizabeth International Airport (PLZ), which is located 10,742 miles (17,287 kilometers) away in Port Elizabeth, South Africa.
- Port Williams Seaplane Base (KPR) currently has only 1 runway.
- Because of Port Williams Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Port Williams 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.
- The closest airport to Port Williams Seaplane Base (KPR) is Kitoi Bay Seaplane Base (KKB), which is located 22 miles (35 kilometers) SSE of KPR.
| 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 | 22.05 miles (35.49 km) SSE | Kitoi Bay Seaplane Base (KKB) | Kitoi Bay, Alaska, United States | |
| 2 | 38.09 miles (61.30 km) S | Ouzinkie Airport (KOZ) | Ouzinkie, Alaska, United States | |
| 3 | 42.14 miles (67.81 km) SSW | Port Bailey Seaplane Base (KPY) | Port Bailey, Kodiak Island Borough, Alaska, United States | |
| 4 | 42.87 miles (69.00 km) SSW | Port Lions Airport (ORI) | Port Lions, Alaska, United States | |
| 5 | 47.88 miles (77.05 km) S | Kodiak Municipal Airport (KDK) | Kodiak, Alaska, United States | |
| 6 | 51.25 miles (82.48 km) S | Kodiak Benny Benson State Airport (ADQ) | Kodiak, Alaska, United States | |
| 7 | 59.00 miles (94.96 km) SSW | San Juan (Uganik) Seaplane Base (UGI) | Uganik Island, United States | |
| 8 | 60.98 miles (98.13 km) SW | West Point Village Seaplane Base (KWP) | West Point, Kodiak Island Borough, Alaska, United States | |
| 9 | 64.02 miles (103.02 km) NNE | Nanwalek Airport (formerly English Bay Airport) (KEB) | Nanwalek (English Bay), Alaska, United States | |
| 10 | 65.07 miles (104.71 km) NNE | Port Graham Airport (PGM) | Port Graham, Alaska, United States | |
| 11 | 72.86 miles (117.26 km) NNE | Seldovia Airport (SOV) | Seldovia, Alaska, United States | |
| 12 | 77.47 miles (124.67 km) SW | Zachar Bay Seaplane Base (KZB) | Zachar Bay, Alaska, United States | |
| 13 | 83.42 miles (134.24 km) SW | Larsen Bay Airport (KLN) | Larsen Bay, Alaska, United States | |
| 14 | 83.63 miles (134.58 km) SSW | Amook Bay Seaplane Base (AOS) | Amook Bay, Alaska, United States | |
| 15 | 88.97 miles (143.18 km) NNE | Homer Airport (HOM) | Homer, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,741.59 miles (17,286.87 km) S | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 2 | 10,729.25 miles (17,267.01 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,713.72 miles (17,242.02 km) S | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 4 | 10,694.34 miles (17,210.82 km) SSE | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 5 | 10,677.93 miles (17,184.42 km) S | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,574.24 miles (17,017.54 km) S | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,522.73 miles (16,934.64 km) S | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 8 | 10,459.91 miles (16,833.56 km) S | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 9 | 10,456.92 miles (16,828.75 km) S | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 10 | 10,454.55 miles (16,824.93 km) S | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 11 | 10,450.94 miles (16,819.11 km) S | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 12 | 10,438.88 miles (16,799.71 km) S | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 13 | 10,434.14 miles (16,792.07 km) S | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 14 | 10,431.16 miles (16,787.29 km) S | Moshoeshoe I International Airport (MSU) | Maseru, Lesotho | |
| 15 | 10,417.16 miles (16,764.75 km) S | Mokhotlong Airport (MKH) | Mokhotlong, Lesotho | |