const AirportTileTable *it = as->table[layout];

	do {

		cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);

	} while ((++it)->ti.x != -0x80);

	if (flags & DC_EXEC) {

		/* Always add the noise, so there will be no need to recalculate when option toggles */

		nearest->noise_reached += newnoise_level;

		st->AddFacility(FACIL_AIRPORT, tile);

		st->airport.type = airport_type;

		st->airport.flags = 0;

		st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);

		it = as->table[layout];

		do {

			TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);

			MakeAirport(cur_tile, st->owner, st->index, it->gfx);

			SetStationTileRandomBits(cur_tile, GB(Random(), 0, 4));

			st->airport.Add(cur_tile);

			if (AirportTileSpec::Get(GetTranslatedAirportTileID(it->gfx))->animation_info != 0xFFFF) AddAnimatedTile(cur_tile);