About this route:

A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Portimão Airport (PRM), Portimão, Algarve, Portugal would travel a Great Circle distance of 5,704 miles (or 9,180 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 Castle Airport and Portimão Airport, 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 Castle Airport and Portimão Airport. You'll see that it will travel the same route of the red line on this map!

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: PRM / LPPM
Airport Names:
  1. Portimão Airport
  2. Aeródromo Municipal de Portimão
Location: Portimão, Algarve, Portugal
GPS Coordinates: 37°8'51"N by 8°34'46"W
Area Served: Portimão
Airport Type: Public
Elevation: 5 feet (2 meters)
# of Runways: 1
View all routes: Routes from PRM
More Information: PRM Maps & Info

Facts about Castle Airport (MER):

  • Castle Airport (MER) currently has only 1 runway.
  • 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 furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
  • The airport is located at the former Castle Air Force Base which closed in 1995.
  • The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
  • 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.

Facts about Portimão Airport (PRM):

  • The closest airport to Portimão Airport (PRM) is Faro International Airport (FAO), which is located 35 miles (56 kilometers) ESE of PRM.
  • In addition to being known as "Portimão Airport", another name for PRM is "Aeródromo Municipal de Portimão".
  • Portimão Airport (PRM) currently has only 1 runway.
  • The furthest airport from Portimão Airport (PRM) is Dargaville Aerodrome (DGR), which is nearly antipodal to Portimão Airport (meaning Portimão Airport is almost on the exact opposite side of the Earth from Dargaville Aerodrome), and is located 12,276 miles (19,756 kilometers) away in Dargaville, New Zealand.
  • Because of Portimão Airport's relatively low elevation of 5 feet, planes can take off or land at Portimão 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.

Map of Nearest Airports to Castle Airport:

List of Nearest Airports to Castle Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
17.26 miles (11.68 km) SSEMerced Regional Airport (MCE)Merced, California, United StatesView Merced Regional Airport on a map Set MCE as origin Airport Set MCE as destination Airport Get more information about Merced Regional Airport
227.12 miles (43.65 km) NWModesto City-County Airport (MOD)Modesto, California, United StatesView Modesto City-County Airport on a map Set MOD as origin Airport Set MOD as destination Airport Get more information about Modesto City-County Airport
327.51 miles (44.27 km) SWLos Banos Municipal Airport (LSN)Los Banos, California, United StatesView Los Banos Municipal Airport on a map Set LSN as origin Airport Set LSN as destination Airport Get more information about Los Banos Municipal Airport
429.78 miles (47.92 km) WNASA Crows Landing Airport (NRC)Crows Landing, California, United StatesView NASA Crows Landing Airport on a map Set NRC as origin Airport Set NRC as destination Airport Get more information about NASA Crows Landing Airport
536.91 miles (59.40 km) SEMadera Municipal Airport (MAE)Madera, California, United StatesView Madera Municipal Airport on a map Set MAE as origin Airport Set MAE as destination Airport Get more information about Madera Municipal Airport
645.69 miles (73.53 km) NColumbia Airport (COA)Columbia, California, United StatesView Columbia Airport on a map Set COA as origin Airport Set COA as destination Airport Get more information about Columbia Airport
751.03 miles (82.13 km) NWStockton Metropolitan Airport (SCK)Stockton, California, United StatesView Stockton Metropolitan Airport on a map Set SCK as origin Airport Set SCK as destination Airport Get more information about Stockton Metropolitan Airport
857.32 miles (92.24 km) SWHollister Municipal Airport (HLI)Hollister, California, United StatesView Hollister Municipal Airport on a map Set HLI as origin Airport Set HLI as destination Airport Get more information about Hollister Municipal Airport
960.88 miles (97.98 km) SEFresno Chandler Executive AirportChandler Municipal Airport (Old) (FCH)Fresno, California, United StatesView Fresno Chandler Executive AirportChandler Municipal Airport (Old) on a map Set FCH as origin Airport Set FCH as destination Airport Get more information about Fresno Chandler Executive AirportChandler Municipal Airport (Old)
1062.71 miles (100.91 km) SEFresno Yosemite International Airport (FAT)Fresno, California, United StatesView Fresno Yosemite International Airport on a map Set FAT as origin Airport Set FAT as destination Airport Get more information about Fresno Yosemite International Airport
1168.82 miles (110.76 km) WReid-Hillview Airport of Santa Clara County (RHV)San Jose, California, United StatesView Reid-Hillview Airport of Santa Clara County on a map Set RHV as origin Airport Set RHV as destination Airport Get more information about Reid-Hillview Airport of Santa Clara County
1271.93 miles (115.77 km) WNWLivermore Municipal Airport (LVK)Livermore, California, United StatesView Livermore Municipal Airport on a map Set LVK as origin Airport Set LVK as destination Airport Get more information about Livermore Municipal Airport
1373.96 miles (119.02 km) WSWWatsonville Municipal Airport (WVI)Watsonville, California, United StatesView Watsonville Municipal Airport on a map Set WVI as origin Airport Set WVI as destination Airport Get more information about Watsonville Municipal Airport
1474.75 miles (120.29 km) WNorman Y. Mineta San Jose International Airport (SJC)San Jose, California, United StatesView Norman Y. Mineta San Jose International Airport on a map Set SJC as origin Airport Set SJC as destination Airport Get more information about Norman Y. Mineta San Jose International Airport
1575.76 miles (121.93 km) SWSalinas Municipal AirportSalinas Army Air Base (SNS)Salinas, California, United StatesView Salinas Municipal AirportSalinas Army Air Base on a map Set SNS as origin Airport Set SNS as destination Airport Get more information about Salinas Municipal AirportSalinas Army Air Base

Map of Furthest Airports from Castle Airport:

List of Furthest Airports from Castle Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
111,311.72 miles (18,204.41 km) SETôlanaro Airport (FTU)Tôlanaro, MadagascarView Tôlanaro Airport on a map Set FTU as origin Airport Set FTU as destination Airport Get more information about Tôlanaro Airport
211,301.64 miles (18,188.18 km) SSEPierrefonds Airport (ZSE)Saint-Pierre, RéunionView Pierrefonds Airport on a map Set ZSE as origin Airport Set ZSE as destination Airport Get more information about Pierrefonds Airport
311,273.49 miles (18,142.87 km) SSERoland Garros Airport (RUN)St Denis, Réunion, FranceView Roland Garros Airport on a map Set RUN as origin Airport Set RUN as destination Airport Get more information about Roland Garros Airport
411,260.93 miles (18,122.66 km) SSir Seewoosagur Ramgoolam International Airport (MRU)Plaisance, MauritiusView Sir Seewoosagur Ramgoolam International Airport on a map Set MRU as origin Airport Set MRU as destination Airport Get more information about Sir Seewoosagur Ramgoolam International Airport
511,205.02 miles (18,032.69 km) SEAmpanihy Airport (AMP)Ampanihy, MadagascarView Ampanihy Airport on a map Set AMP as origin Airport Set AMP as destination Airport Get more information about Ampanihy Airport
611,196.39 miles (18,018.79 km) SSWSir Gaëtan Duval Airport (RRG)Rodrigues Island, MauritiusView Sir Gaëtan Duval Airport on a map Set RRG as origin Airport Set RRG as destination Airport Get more information about Sir Gaëtan Duval Airport
711,137.28 miles (17,923.67 km) SSEMananjary Airport (MNJ)Mananjary, MadagascarView Mananjary Airport on a map Set MNJ as origin Airport Set MNJ as destination Airport Get more information about Mananjary Airport
811,111.96 miles (17,882.92 km) SEFianarantsoa Airport (WFI)Fianarantsoa, MadagascarView Fianarantsoa Airport on a map Set WFI as origin Airport Set WFI as destination Airport Get more information about Fianarantsoa Airport
911,011.03 miles (17,720.49 km) SEManja Airport (MJA)Manja, Menabe, MadagascarView Manja Airport on a map Set MJA as origin Airport Set MJA as destination Airport Get more information about Manja Airport
1011,008.37 miles (17,716.22 km) SEAndavadoaka Airport (DVD)Andavadoaka, Toliara province, Atsimo-Andrefana region, MadagascarView Andavadoaka Airport on a map Set DVD as origin Airport Set DVD as destination Airport Get more information about Andavadoaka Airport
1110,993.21 miles (17,691.82 km) SEMorombe Airport (MXM)Morombe, MadagascarView Morombe Airport on a map Set MXM as origin Airport Set MXM as destination Airport Get more information about Morombe Airport
1210,972.89 miles (17,659.11 km) SSEToamasino Airport (TMM)Toamasina, MadagascarView Toamasino Airport on a map Set TMM as origin Airport Set TMM as destination Airport Get more information about Toamasino Airport
1310,963.56 miles (17,644.10 km) SSEIvato International Airport (TNR)Antananarivo, MadagascarView Ivato International Airport on a map Set TNR as origin Airport Set TNR as destination Airport Get more information about Ivato International Airport
1410,945.21 miles (17,614.56 km) SEMiandrivazo Airport (ZVA)Miandrivazo, MadagascarView Miandrivazo Airport on a map Set ZVA as origin Airport Set ZVA as destination Airport Get more information about Miandrivazo Airport
1510,920.84 miles (17,575.35 km) SEBelo sur Tsiribihina Airport (BMD)Belo sur Tsiribihina, MadagascarView Belo sur Tsiribihina Airport on a map Set BMD as origin Airport Set BMD as destination Airport Get more information about Belo sur Tsiribihina Airport

Map of Nearest Airports to Portimão Airport:

List of Nearest Airports to Portimão Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
135.07 miles (56.43 km) ESEFaro International Airport (FAO)Faro, PortugalView Faro International Airport on a map Set FAO as destination Airport Set FAO as destination Airport Get more information about Faro International Airport
273.46 miles (118.22 km) NNEBeja Airport (BYJ)Beja, PortugalView Beja Airport on a map Set BYJ as destination Airport Set BYJ as destination Airport Get more information about Beja Airport
3116.38 miles (187.29 km) NNWLisbon Portela Airport (LIS)Lisbon, PortugalView Lisbon Portela Airport on a map Set LIS as destination Airport Set LIS as destination Airport Get more information about Lisbon Portela Airport
4141.89 miles (228.35 km) EJerez Airport (XRY)Jerez de la Frontera, SpainView Jerez Airport on a map Set XRY as destination Airport Set XRY as destination Airport Get more information about Jerez Airport
5148.55 miles (239.07 km) ESeville Airport (SVQ)Seville, SpainView Seville Airport on a map Set SVQ as destination Airport Set SVQ as destination Airport Get more information about Seville Airport
6153.87 miles (247.63 km) NEBadajoz Airport (BJZ)Badajoz, SpainView Badajoz Airport on a map Set BJZ as destination Airport Set BJZ as destination Airport Get more information about Badajoz Airport
7177.59 miles (285.80 km) ESETangier Ibn Battouta Airport (TNG)Tangier, MoroccoView Tangier Ibn Battouta Airport on a map Set TNG as destination Airport Set TNG as destination Airport Get more information about Tangier Ibn Battouta Airport
8191.82 miles (308.70 km) ESEGibraltar International Airport (GIB)GibraltarView Gibraltar International Airport on a map Set GIB as destination Airport Set GIB as destination Airport Get more information about Gibraltar International Airport
9201.39 miles (324.11 km) ESECeuta Heliport (JCU)Ceuta, SpainView Ceuta Heliport on a map Set JCU as destination Airport Set JCU as destination Airport Get more information about Ceuta Heliport
10207.96 miles (334.68 km) NCoimbra Airport (CBP)Coimbra, PortugalView Coimbra Airport on a map Set CBP as destination Airport Set CBP as destination Airport Get more information about Coimbra Airport
11210.45 miles (338.68 km) ENECórdoba Airport (ODB)Córdoba, SpainView Córdoba Airport on a map Set ODB as destination Airport Set ODB as destination Airport Get more information about Córdoba Airport
12210.70 miles (339.09 km) ESESania Ramel Airport (SII)Sidi Ifni, MoroccoView Sania Ramel Airport on a map Set SII as destination Airport Set SII as destination Airport Get more information about Sania Ramel Airport
13210.70 miles (339.09 km) ESESania Ramel Airport (TTU)Tétouan, MoroccoView Sania Ramel Airport on a map Set TTU as destination Airport Set TTU as destination Airport Get more information about Sania Ramel Airport
14223.39 miles (359.50 km) NNECovilhã Airport (COV)Covilhã, PortugalView Covilhã Airport on a map Set COV as destination Airport Set COV as destination Airport Get more information about Covilhã Airport
15226.09 miles (363.85 km) SSEKenitra Air Base (NNA)Kenitra, MoroccoView Kenitra Air Base on a map Set NNA as destination Airport Set NNA as destination Airport Get more information about Kenitra Air Base

Map of Furthest Airports from Portimão Airport:

List of Furthest Airports from Portimão Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
112,276.14 miles (19,756.49 km) WSWDargaville Aerodrome (DGR)Dargaville, New ZealandView Dargaville Aerodrome on a map Set DGR as destination Airport Set DGR as destination Airport Get more information about Dargaville Aerodrome
212,259.49 miles (19,729.69 km) SWKaitaia Airport (KAT)Kaitaia, New ZealandView Kaitaia Airport on a map Set KAT as destination Airport Set KAT as destination Airport Get more information about Kaitaia Airport
312,259.28 miles (19,729.35 km) SWKaikohe Aerodrome (KKO)Kaikohe, New ZealandView Kaikohe Aerodrome on a map Set KKO as destination Airport Set KKO as destination Airport Get more information about Kaikohe Aerodrome
412,250.71 miles (19,715.56 km) WAuckland Airport (AKL)Mangere, New ZealandView Auckland Airport on a map Set AKL as destination Airport Set AKL as destination Airport Get more information about Auckland Airport
512,247.45 miles (19,710.31 km) WSWWhangarei Airport (WRE)Whangarei, New ZealandView Whangarei Airport on a map Set WRE as destination Airport Set WRE as destination Airport Get more information about Whangarei Airport
612,246.41 miles (19,708.63 km) SWKerikeri Airport (KKE)Kerikeri, New ZealandView Kerikeri Airport on a map Set KKE as destination Airport Set KKE as destination Airport Get more information about Kerikeri Airport
712,240.81 miles (19,699.63 km) WArdmore Airport (AMZ)Ardmore, New ZealandView Ardmore Airport on a map Set AMZ as destination Airport Set AMZ as destination Airport Get more information about Ardmore Airport
812,239.20 miles (19,697.04 km) SWNew Plymouth Airport (NPL)New Plymouth, New ZealandView New Plymouth Airport on a map Set NPL as destination Airport Set NPL as destination Airport Get more information about New Plymouth Airport
912,216.74 miles (19,660.88 km) WSWHamilton International Airport (HLZ)Hamilton, New ZealandView Hamilton International Airport on a map Set HLZ as destination Airport Set HLZ as destination Airport Get more information about Hamilton International Airport
1012,209.80 miles (19,649.71 km) WCoromandel Aerodrome (CMV)Coromandel, New ZealandView Coromandel Aerodrome on a map Set CMV as destination Airport Set CMV as destination Airport Get more information about Coromandel Aerodrome
1112,209.43 miles (19,649.12 km) WThames Aerodrome (TMZ)Thames, New ZealandView Thames Aerodrome on a map Set TMZ as destination Airport Set TMZ as destination Airport Get more information about Thames Aerodrome
1212,203.79 miles (19,640.04 km) WSWGreat Barrier Aerodrome (GBZ)Great Barrier Island, New ZealandView Great Barrier Aerodrome on a map Set GBZ as destination Airport Set GBZ as destination Airport Get more information about Great Barrier Aerodrome
1312,196.40 miles (19,628.15 km) WMatamata Airport (MTA)Matamata, New ZealandView Matamata Airport on a map Set MTA as destination Airport Set MTA as destination Airport Get more information about Matamata Airport
1412,172.16 miles (19,589.14 km) WTauranga Airport (TRG)Tauranga, New ZealandView Tauranga Airport on a map Set TRG as destination Airport Set TRG as destination Airport Get more information about Tauranga Airport
1512,166.84 miles (19,580.58 km) SSWTakaka Aerodrome (KTF)Takaka, New ZealandView Takaka Aerodrome on a map Set KTF as destination Airport Set KTF as destination Airport Get more information about Takaka Aerodrome