Nonstop flight route between Novato, California, United States and Helena, Montana, United States:
Departure Airport:
(38°8'36"N by 122°33'21"W)
Arrival Airport:
(46°36'24"N by 111°58'58"W)
Distance from NOT to HLN:
794.33 miles (1,278.34 km)
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Jump to:
- About this route
- NOT Airport Information
- HLN Airport Information
- Facts about NOT
- Facts about HLN
- Map of Nearest Airports to NOT
- List of Nearest Airports to NOT
- Map of Furthest Airports from NOT
- List of Furthest Airports from NOT
- Map of Nearest Airports to HLN
- List of Nearest Airports to HLN
- Map of Furthest Airports from HLN
- List of Furthest Airports from HLN
About this route:
A direct, nonstop flight between Marin County Airport (NOT), Novato, California, United States and Helena Regional Airport (HLN), Helena, Montana, United States would travel a Great Circle distance of 794 miles (or 1,278 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 Marin County Airport and Helena Regional Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | NOT / KDVO |
| Airport Names: |
|
| Location: | Novato, California, United States |
| GPS Coordinates: | 38°8'36"N by 122°33'21"W |
| Operator/Owner: | Marin County |
| Elevation: | 2 feet (1 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from NOT |
| More Information: | NOT Maps & Info |
Arrival 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 |
Facts about Marin County Airport (NOT):
- Marin County Airport or Gnoss Field, formerly O56, is a public airport two miles northeast of Novato.
- The furthest airport from Marin County Airport (NOT) is Tôlanaro Airport (FTU), which is located 11,343 miles (18,254 kilometers) away in Tôlanaro, Madagascar.
- When Gnoss Field's crosswinds exceed pilot or aircraft limitations, local pilots generally land at Petaluma Municipal / K069, 327 magnetic heading) or Napa County Airport / KAPC, 058 magnetic heading).
- The closest airport to Marin County Airport (NOT) is Napa County Airport (APC), which is located only 16 miles (25 kilometers) ENE of NOT.
- Because of Marin County Airport's relatively low elevation of 2 feet, planes can take off or land at Marin County 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.
- Typical left traffic pattern 13 landings during high crosswinds are flown through varying rotor wind turbulence on the backside of Burdell Mountain and a relatively constant crosswind near the ground.
- Marin County Airport (NOT) currently has only 1 runway.
- In addition to being known as "Marin County Airport", other names for NOT include "Gnoss Field" and "DVO".
- Somehow Gnoss's single runway is laid out almost exactly perpendicular to the prevailing offshore west winds.
- In 1968 the County of Marin bought the airport and moved it to its present location.
Facts about Helena Regional Airport (HLN):
- Helena Regional Airport is a public airport two miles northeast of Helena, in Lewis and Clark County, Montana.
- In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".
- Helena Regional Airport (HLN) has 3 runways.
- 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.
- The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 15.71 miles (25.29 km) ENE | Napa County Airport (APC) | Napa, California, United States |     |
| 2 | 28.82 miles (46.38 km) NNW | Charles M. Schulz–Sonoma County Airport (STS) | Santa Rosa, California, United States | |
| 3 | 29.16 miles (46.93 km) ESE | Buchanan FieldConcord Army Air Base (CCR) | Concord, California, United States | |
| 4 | 34.42 miles (55.40 km) SSE | Oakland International Airport (OAK) | Oakland (near San Francisco), California, United States | |
| 5 | 35.11 miles (56.50 km) ENE | Travis Air Force Base Fairfield-Suisun Army Airfield (SUU) | Fairfield, California, United States | |
| 6 | 36.08 miles (58.07 km) ENE | Nut Tree Airport (VCB) | Vacaville, California, United States | |
| 7 | 37.58 miles (60.47 km) SSE | San Francisco International Airport (SFO) | San Francisco, California, United States | |
| 8 | 41.02 miles (66.01 km) SE | Hayward Executive Airport (HWD) | Hayward, California, United States | |
| 9 | 43.65 miles (70.25 km) S | Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF) | Half Moon Bay, California, United States | |
| 10 | 50.75 miles (81.68 km) SE | Livermore Municipal Airport (LVK) | Livermore, California, United States | |
| 11 | 52.95 miles (85.21 km) SSE | Palo Alto Airport of Santa Clara County (PAO) | Palo Alto, California, United States | |
| 12 | 57.47 miles (92.49 km) SSE | Moffett Federal Airfield (NUQ) | Mountain View, California, United States | |
| 13 | 62.99 miles (101.37 km) ENE | Sacramento Executive Airport (SAC) | Sacramento, California, United States | |
| 14 | 63.90 miles (102.84 km) SSE | Norman Y. Mineta San Jose International Airport (SJC) | San Jose, California, United States | |
| 15 | 64.69 miles (104.11 km) NE | Sacramento International Airport (SMF) | Sacramento, California, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,342.67 miles (18,254.22 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 11,268.31 miles (18,134.55 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 11,245.84 miles (18,098.38 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 4 | 11,239.15 miles (18,087.62 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 11,212.82 miles (18,045.25 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 6 | 11,147.12 miles (17,939.51 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 7 | 11,129.19 miles (17,910.65 km) SSE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 8 | 11,117.85 miles (17,892.39 km) SSW | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 9 | 11,046.08 miles (17,776.90 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 11,041.82 miles (17,770.04 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 11,029.27 miles (17,749.84 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,971.75 miles (17,657.28 km) SSE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 13 | 10,969.80 miles (17,654.14 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 14 | 10,965.20 miles (17,646.74 km) SSE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,945.36 miles (17,614.80 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |
| 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 | |