Well... here is the data I gathered. For the info I got... in the past LAR Transregional, Linhas Aéreas Regionais S.A. (1985 - 1993) flew to this airports.
Aeródromo Municipal de Bragança - ( LPBG )
ICAO ID: LPBG
Time: UTC 0(+1DT)
Latitude: 41.857800 (41° 51' 28.08" N)
Longitude: -6.707125 (006° 42' 25.65" W)
Elevation: 2241 feet (683 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
02/20 / 5600 x 98 feet (1707 x 30 meters) / ASPHALT / - / NO
----------------------------------
Aeródromo Municipal de Vila Real - ( LPVR )
ICAO ID: LPVR
Time: UTC 0(+1DT)
Latitude: 41.274334 (41° 16' 27.60" N)
Longitude: -7.720472 (007° 43' 13.70" W)
Elevation: 1805 feet (550 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
02/20 / 3107 x 98 feet (947 x 30 meters) / ASPHALT / - / NO
----------------------------------------
Aeródromo Gonçalves Lobato ( LPVZ)
ICAO ID: LPVZ
Time: UTC 0(+1DT)
Latitude: 40.725539 (40° 43' 31.94" N)
Longitude: -7.888992 (007° 53' 20.37" W)
Elevation: 2060 feet (628 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
01/19 / 4015 x 97 feet (1224 x 30 meters) / ASPHALT / - / NO
--------------------------------------------
Aerodromo Municipal da Covilhã ( LPCV )
ICAO ID: LPCV
Time: UTC 0(+1DT)
Latitude: 40.264772 (40° 15' 53.18" N)
Longitude: -7.479958 (007° 28' 47.85" W)
Elevation: 1572 feet (479 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
06/24 / 3150 x 75 feet (960 x 23 meters) / ASPHALT / - /NO
----------------------------------------------
Aerodromo Dr. Bissaia Barreto - ( LPCO )
ICAO ID: LPCO
Time: UTC 0(+1DT)
Latitude: 40.157223 (40° 09' 26.00" N)
Longitude: -8.470000 (008° 28' 12.00" W)
Elevation: 587 feet (179 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
16/34 / 3018 x 98 feet (920 x 30 meters) / CONCRETE. / - / NO
-------------------------------
Aerodromo Municipal de Portimão - ( LPPM )
ICAO ID: LPPM
Time: UTC 0(+1DT)
Latitude: 37.149331 (37° 08' 57.59" N)
Longitude: -8.583961 (008° 35' 02.26" W)
Elevation: 5 feet (2 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
11/29 / 2819 x 98 feet (859 x 30 meters) / ASPHALT / - / NO
-------------------------------
Aeródromo Municipal de Chaves - ( LPCH )
ICAO ID: LPCH
Time: UTC 0(+1DT)
Latitude: N 41º 43, 55'
Longitude: W 007º 27, 93'
Elevation: 1181 feet
Runways:
ID / Dimensions / Surface / PCN / ILS
16/34 / 857m x 23m / ASPHALT / - / NO
Some other smaller airports that I found:
Aeródromo de Évora ( LPEV )
ICAO ID: LPEV
Time: UTC 0(+1DT)
Latitude: 38.533472 (38° 32' 00.50" N)
Longitude: -7.889639 (007° 53' 22.70" W )
Elevation: 807 feet (246 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
01/19 / 4265 x 75 feet (1300 x 23 meters) / ASPHALT / - / NO
08/26 CLOSED
------------------------------
Aeródromo Municipal de Cascais - ( LPCS )
ICAO ID: LPCS
Time: UTC 0(+1DT)
Latitude: 38.725025 (38° 43' 30.09" N)
Longitude: -9.355231 (009° 21' 18.83" W)
Elevation: 326 feet (99 meters)
Runways:
ID / Dimensions / Surface / PCN / ILS
17/35 / 3904 x 98 feet (1190 x 30 meters) / ASPHALT / 020FBWT / NO
---------------------------------------------------------
And I got this data from the following websites:
http://www.worldaerodata.com/http://www.pelicano.com.pt/zmapa.html