Nonstop flight route between Atwater, California, United States and Ontario, Oregon, United States:
Departure Airport:
(37°22'50"N by 120°34'5"W)
Arrival Airport:
(44°1'9"N by 117°0'47"W)
Distance from MER to ONO:
494.93 miles (796.51 km)
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Jump to:
- About this route
- MER Airport Information
- ONO Airport Information
- Facts about MER
- Facts about ONO
- Map of Nearest Airports to MER
- List of Nearest Airports to MER
- Map of Furthest Airports from MER
- List of Furthest Airports from MER
- Map of Nearest Airports to ONO
- List of Nearest Airports to ONO
- Map of Furthest Airports from ONO
- List of Furthest Airports from ONO
About this route:
A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Ontario Municipal Airport (ONO), Ontario, Oregon, United States would travel a Great Circle distance of 495 miles (or 797 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 Castle Airport and Ontario Municipal Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | MER / KMER |
| Airport Name: | Castle Airport |
| Location: | Atwater, California, United States |
| GPS Coordinates: | 37°22'50"N by 120°34'5"W |
| Operator/Owner: | Merced County Department of Commerce, Aviation, and Economic Development |
| Airport Type: | Public |
| Elevation: | 191 feet (58 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from MER |
| More Information: | MER Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | ONO / KONO |
| Airport Name: | Ontario Municipal Airport |
| Location: | Ontario, Oregon, United States |
| GPS Coordinates: | 44°1'9"N by 117°0'47"W |
| Area Served: | Ontario, Oregon |
| Operator/Owner: | City of Ontario |
| Airport Type: | Public |
| Elevation: | 2193 feet (668 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from ONO |
| More Information: | ONO Maps & Info |
Facts about Castle Airport (MER):
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- Since the mid-1940s, aircraft maintenance, fuel management, and fire training activities on the base have generated wastes that consist primarily of waste fuels, oils, solvents, and cleaners.
- Castle Airport (MER) currently has only 1 runway.
- With its central location in the San Joaquin Valley, on the route of the proposed California High-Speed Rail system, and with a large, underdeveloped site, Castle Airport has been submitted as a possible location for the central maintenance facility for the system.
- Because of Castle Airport's relatively low elevation of 191 feet, planes can take off or land at Castle 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 Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
Facts about Ontario Municipal Airport (ONO):
- Ontario Municipal Airport is three miles west of Ontario, in Malheur County, Oregon.
- The furthest airport from Ontario Municipal Airport (ONO) is Tôlanaro Airport (FTU), which is located 10,845 miles (17,454 kilometers) away in Tôlanaro, Madagascar.
- Ontario Municipal Airport (ONO) currently has only 1 runway.
- Ontario Municipal Airport covers 480 acres at an elevation of 2,193 feet.
- The closest airport to Ontario Municipal Airport (ONO) is Boise Airport (BOI), which is located 50 miles (81 kilometers) SE of ONO.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 7.26 miles (11.68 km) SSE | Merced Regional Airport (MCE) | Merced, California, United States |     |
| 2 | 27.12 miles (43.65 km) NW | Modesto City-County Airport (MOD) | Modesto, California, United States | |
| 3 | 27.51 miles (44.27 km) SW | Los Banos Municipal Airport (LSN) | Los Banos, California, United States | |
| 4 | 29.78 miles (47.92 km) W | NASA Crows Landing Airport (NRC) | Crows Landing, California, United States | |
| 5 | 36.91 miles (59.40 km) SE | Madera Municipal Airport (MAE) | Madera, California, United States | |
| 6 | 45.69 miles (73.53 km) N | Columbia Airport (COA) | Columbia, California, United States | |
| 7 | 51.03 miles (82.13 km) NW | Stockton Metropolitan Airport (SCK) | Stockton, California, United States | |
| 8 | 57.32 miles (92.24 km) SW | Hollister Municipal Airport (HLI) | Hollister, California, United States | |
| 9 | 60.88 miles (97.98 km) SE | Fresno Chandler Executive AirportChandler Municipal Airport (Old) (FCH) | Fresno, California, United States | |
| 10 | 62.71 miles (100.91 km) SE | Fresno Yosemite International Airport (FAT) | Fresno, California, United States | |
| 11 | 68.82 miles (110.76 km) W | Reid-Hillview Airport of Santa Clara County (RHV) | San Jose, California, United States | |
| 12 | 71.93 miles (115.77 km) WNW | Livermore Municipal Airport (LVK) | Livermore, California, United States | |
| 13 | 73.96 miles (119.02 km) WSW | Watsonville Municipal Airport (WVI) | Watsonville, California, United States | |
| 14 | 74.75 miles (120.29 km) W | Norman Y. Mineta San Jose International Airport (SJC) | San Jose, California, United States | |
| 15 | 75.76 miles (121.93 km) SW | Salinas Municipal AirportSalinas Army Air Base (SNS) | Salinas, California, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,311.72 miles (18,204.41 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 11,301.64 miles (18,188.18 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 11,273.49 miles (18,142.87 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 4 | 11,260.93 miles (18,122.66 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 5 | 11,205.02 miles (18,032.69 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 6 | 11,196.39 miles (18,018.79 km) SSW | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 7 | 11,137.28 miles (17,923.67 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 11,111.96 miles (17,882.92 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 11,011.03 miles (17,720.49 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 10 | 11,008.37 miles (17,716.22 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 11 | 10,993.21 miles (17,691.82 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,972.89 miles (17,659.11 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,963.56 miles (17,644.10 km) SSE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,945.21 miles (17,614.56 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,920.84 miles (17,575.35 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 50.42 miles (81.14 km) SE | Boise Airport (BOI) | Boise, Idaho, United States | |
| 2 | 68.81 miles (110.75 km) NW | Baker City Municipal Airport (BKE) | Baker City, Oregon, United States | |
| 3 | 75.01 miles (120.72 km) NE | McCall Municipal Airport (MYL) | McCall, Idaho, United States | |
| 4 | 88.37 miles (142.22 km) SE | Mountain Home Air Force Base (MUO) | Mountain Home, Idaho, United States | |
| 5 | 100.36 miles (161.52 km) WNW | Grant County Regional Airport (GCRA) (JDA) | John Day, Oregon, United States | |
| 6 | 100.48 miles (161.71 km) NNW | La Grande/Union County Airport (LGD) | La Grande, Oregon, United States | |
| 7 | 101.26 miles (162.96 km) WSW | Burns Municipal Airport (BNO) | Burns, Oregon, United States | |
| 8 | 108.84 miles (175.16 km) SSW | Rome State Airport (REO) | Rome, Oregon, United States | |
| 9 | 140.20 miles (225.63 km) ESE | Friedman Memorial Airport (SUN) | Hailey, Idaho, United States | |
| 10 | 142.60 miles (229.50 km) ENE | Challis Airport (CHL) | Challis, Idaho, United States | |
| 11 | 146.35 miles (235.53 km) NW | Eastern Oregon Regional Airport (PDT) | Pendleton, Oregon, United States | |
| 12 | 156.32 miles (251.57 km) NNW | Walla Walla Regional AirportWalla Walla Army Air Base (ALW) | Walla Walla, Washington, United States | |
| 13 | 162.71 miles (261.86 km) N | Lewiston-Nez Perce County Airport (LWS) | Lewiston, Idaho, United States | |
| 14 | 165.63 miles (266.56 km) SE | Magic Valley Regional Airport (TWF) | Twin Falls, Idaho, United States | |
| 15 | 166.40 miles (267.80 km) NW | Hermiston Municipal Airport (HES) | Hermiston, Oregon, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,845.45 miles (17,454.02 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 10,809.81 miles (17,396.66 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,782.18 miles (17,352.19 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 4 | 10,778.62 miles (17,346.46 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 5 | 10,760.32 miles (17,317.02 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 6 | 10,752.14 miles (17,303.85 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,651.39 miles (17,141.71 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,631.69 miles (17,110.00 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,551.48 miles (16,980.91 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 10,544.91 miles (16,970.35 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,534.01 miles (16,952.81 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,480.26 miles (16,866.30 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,476.44 miles (16,860.15 km) SSE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,467.37 miles (16,845.56 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,447.56 miles (16,813.67 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |