Runway surfaces

Hard

Hard runways are paved and for aircrafts with conventional landing gear.

Asphalt

Asphalt is the most common hard surface covered by 38% of all runways.

Concrete

Concrete is covered by 6% of all runways and is found world-wide. Examples: UWLW, KEDW, EPPW, VYMD, FZAA.

Bituminous

Bituminous is covered by 1.4% of all runways and is found world-wide. Examples: WSSS, LICJ, HKJK, VYTO, GMMN.

Tarmac

Bituminous is covered by 0.5% of all runways and is found world-wide. Examples: HCMI, HTKJ, LFPB, WMKD, VEIM.

Cement

Cement is a supported surface but none of the default runways have this surface.

Snow and ice

The few snow and ice runways are all located far north and south. The runways require aircrafts to be equipped with skies.

Ice

4 runways are covered by ice: 74AK, NZIR, NZPG.

Snow

6 runways are covered by snow: CTE5, NZSP, NZWD, SA47, NZ12.

Water

Water runways don't have physical markings, but they indicate that you have a certain straight out distance available for takeoffs and landings in seaplanes.

2.3% of all runways are water runways and they are only present in US territories.

Lake Hood Seaplane Base (PALH), Alaska, USA, is claimed to be the world's busiest seaplane base and is problably the best modeled seaplane base in FS.

Soft

Soft runways are unpaved and for aircrafts with conventional landing gear.

Grass

Grass is the most common surface covered by 39% of all runways.

Gravel

Gravel is covered by 5% of all runways and is found world-wide. Examples: 97TX, SSBR, OYBD, VI66, NCPY.

Dirt

Dirt is covered by 5% of all runways and is found world-wide. Examples: KEDW, LESA, HCMN, GQNC, Z12E.

Macadam

Macadam is covered by 0.6% of all runways and is found world-wide. Examples: DIAP, LFRB, EPKS, RPMU, GATB.

Sand

Sand is covered by 0.6% of all runways and is found world-wide. Examples: ORBD, SSSG, EGCO, CYGW, S16.

Turf/clay

Turf is covered by 0.3% of all runways and is found world-wide. Examples: SPNP, SNOA, SYLP, YIMB, CET2.

Oil treated

Oil treated is covered by 0.2% of all runways and is found mostly in the USA. Examples: 34CN, CA40, CEX5, ERU, SPRM.

Coral

Coral is covered by 0.1% of all runways and is found world-wide. Examples: RODE, PHFS, YTTI, NGFU, MYE4.

Shale

7 runways in Brazil are covered by shale: SWPB, SWOW, SNYA, SWAI, SNAI, SNPB, SNMI.

Planks

6 runways are covered by planks: NXP, 9OA3, VVDB, VVNS, Z19N, AYKK.

Brick

A single brick runway is found at Mao (FTTU) in Chad.

Steel mats

A single steel mat runway is found at Bogue MCALF (KNJM) in Swansboro, North Carolina, USA.