Nonstop flight route between Helena, Montana, United States and Half Moon Bay, California, United States:
Departure Airport:
(46°36'24"N by 111°58'58"W)
Arrival Airport:
(37°30'47"N by 122°30'3"W)
Distance from HLN to HAF:
826.68 miles (1,330.42 km)
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- About this route
- HLN Airport Information
- HAF Airport Information
- Facts about HLN
- Facts about HAF
- Map of Nearest Airports to HLN
- List of Nearest Airports to HLN
- Map of Furthest Airports from HLN
- List of Furthest Airports from HLN
- Map of Nearest Airports to HAF
- List of Nearest Airports to HAF
- Map of Furthest Airports from HAF
- List of Furthest Airports from HAF
About this route:
A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF), Half Moon Bay, California, United States would travel a Great Circle distance of 827 miles (or 1,330 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 Helena Regional Airport and Half Moon Bay AirportHalf Moon Bay Flight Strip, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | HLN / KHLN |
| Airport Names: |
|
| Location: | Helena, Montana, United States |
| GPS Coordinates: | 46°36'24"N by 111°58'58"W |
| Area Served: | Helena, Montana |
| Operator/Owner: | Helena Regional Airport Authority |
| Airport Type: | Public |
| Elevation: | 3877 feet (1,182 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from HLN |
| More Information: | HLN Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | HAF / KHAF |
| Airport Name: | Half Moon Bay AirportHalf Moon Bay Flight Strip |
| Location: | Half Moon Bay, California, United States |
| GPS Coordinates: | 37°30'47"N by 122°30'3"W |
| Operator/Owner: | San Mateo County |
| Airport Type: | Public |
| Elevation: | 66 feet (20 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from HAF |
| More Information: | HAF Maps & Info |
Facts about Helena Regional Airport (HLN):
- The furthest airport from Helena Regional Airport (HLN) is Sir Gaëtan Duval Airport (RRG), which is located 10,563 miles (17,000 kilometers) away in Rodrigues Island, Mauritius.
- In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".
- The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport.Federal Aviation Administration records say the airport had 85,649 passenger boardings in calendar year 2008, 88,314 in 2009 and 98,193 in 2010.
- The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
- Helena Regional Airport (HLN) has 3 runways.
Facts about Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF):
- Known as Half Moon Bay Flight Strip, the airport supported Salinas AAF's ground support mission to train light observation and reconnaissance squadrons.
- Because of Half Moon Bay AirportHalf Moon Bay Flight Strip's relatively low elevation of 66 feet, planes can take off or land at Half Moon Bay AirportHalf Moon Bay Flight Strip 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 Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF) is Tôlanaro Airport (FTU), which is located 11,375 miles (18,307 kilometers) away in Tôlanaro, Madagascar.
- The closest airport to Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF) is San Francisco International Airport (SFO), which is located only 10 miles (16 kilometers) NE of HAF.
- Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF) currently has only 1 runway.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 51.31 miles (82.58 km) SSW | Bert Mooney Airport (BTM) | Butte, Montana, United States |     |
| 2 | 67.05 miles (107.90 km) NNE | Great Falls International Airport (GTF) | Great Falls, Montana, United States | |
| 3 | 69.72 miles (112.21 km) SE | Bozeman Yellowstone International Airport (BZN) | Bozeman, Montana, United States | |
| 4 | 72.47 miles (116.63 km) NNE | Malmstrom Air Force Base (GFA) | Great Falls, Montana, United States | |
| 5 | 96.56 miles (155.40 km) SE | Mission Field (LVM) | Livingston, Montana, United States | |
| 6 | 97.30 miles (156.59 km) SSW | Dillon Airport (DLN) | Dillon, Montana, United States | |
| 7 | 102.03 miles (164.20 km) WNW | Missoula International Airport (MSO) | Missoula, Montana, United States | |
| 8 | 122.80 miles (197.63 km) ENE | Lewistown Municipal Airport (LWT) | Lewistown, Montana, United States | |
| 9 | 133.72 miles (215.20 km) N | Shelby Airport (SBX) | Shelby, Montana, United States | |
| 10 | 137.25 miles (220.89 km) SW | Lemhi County Airport (SMN) | Salmon, Idaho, United States | |
| 11 | 138.97 miles (223.65 km) SSE | Yellowstone Airport (WYS) | West Yellowstone, Montana, United States | |
| 12 | 139.51 miles (224.52 km) N | Cut Bank Municipal AirportCut Bank Army Air Field (CTB) | Cut Bank, Montana, United States | |
| 13 | 158.54 miles (255.14 km) NW | Glacier Park International Airport (FCA) | Kalispell, Montana, United States | |
| 14 | 163.70 miles (263.45 km) E | Roundup Airport (RPX) | Roundup, Montana, United States | |
| 15 | 169.14 miles (272.20 km) NE | Havre City-County Airport (HVR) | Havre, Montana, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,563.08 miles (16,999.59 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,552.15 miles (16,981.99 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,548.64 miles (16,976.36 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 4 | 10,536.59 miles (16,956.96 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 5 | 10,525.82 miles (16,939.62 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 6 | 10,452.26 miles (16,821.24 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,363.52 miles (16,678.43 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,340.10 miles (16,640.74 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,252.07 miles (16,499.06 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 10,247.66 miles (16,491.97 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,235.05 miles (16,471.68 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,200.52 miles (16,416.11 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,189.58 miles (16,398.51 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,174.40 miles (16,374.07 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,162.80 miles (16,355.40 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10.04 miles (16.17 km) NE | San Francisco International Airport (SFO) | San Francisco, California, United States | |
| 2 | 21.02 miles (33.83 km) NE | Oakland International Airport (OAK) | Oakland (near San Francisco), California, United States | |
| 3 | 21.47 miles (34.56 km) E | Palo Alto Airport of Santa Clara County (PAO) | Palo Alto, California, United States | |
| 4 | 23.08 miles (37.15 km) ENE | Hayward Executive Airport (HWD) | Hayward, California, United States | |
| 5 | 25.74 miles (41.43 km) ESE | Moffett Federal Airfield (NUQ) | Mountain View, California, United States | |
| 6 | 33.06 miles (53.20 km) ESE | Norman Y. Mineta San Jose International Airport (SJC) | San Jose, California, United States | |
| 7 | 39.29 miles (63.22 km) ENE | Livermore Municipal Airport (LVK) | Livermore, California, United States | |
| 8 | 39.42 miles (63.43 km) ESE | Reid-Hillview Airport of Santa Clara County (RHV) | San Jose, California, United States | |
| 9 | 40.89 miles (65.81 km) NE | Buchanan FieldConcord Army Air Base (CCR) | Concord, California, United States | |
| 10 | 43.65 miles (70.25 km) N | Marin County Airport (NOT) | Novato, California, United States | |
| 11 | 49.83 miles (80.19 km) NNE | Napa County Airport (APC) | Napa, California, United States | |
| 12 | 55.89 miles (89.95 km) SE | Watsonville Municipal Airport (WVI) | Watsonville, California, United States | |
| 13 | 60.50 miles (97.36 km) NNE | Travis Air Force Base Fairfield-Suisun Army Airfield (SUU) | Fairfield, California, United States | |
| 14 | 66.57 miles (107.13 km) NNE | Nut Tree Airport (VCB) | Vacaville, California, United States | |
| 15 | 70.85 miles (114.02 km) NNW | Charles M. Schulz–Sonoma County Airport (STS) | Santa Rosa, California, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,375.17 miles (18,306.51 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 11,311.22 miles (18,203.59 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 11,282.11 miles (18,156.76 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 4 | 11,275.53 miles (18,146.17 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 5 | 11,256.40 miles (18,115.38 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 6 | 11,184.20 miles (17,999.18 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 7 | 11,164.74 miles (17,967.85 km) SSE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 8 | 11,160.29 miles (17,960.70 km) SSW | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 9 | 11,076.50 miles (17,825.85 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 11,074.09 miles (17,821.98 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 11,060.13 miles (17,799.52 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 11,009.07 miles (17,717.34 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 11,009.04 miles (17,717.29 km) SSE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 11,000.03 miles (17,702.79 km) SSE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,979.13 miles (17,669.15 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |