Here are some numbers for those who want to play with them. These numbers represent the velocity change (delta-v) in kilometers per second (km/sec) required for a body to shift orbit location to include launch or landing.

From To Delta-V
LEOPhobos, Deimos5.6
LEOMars Surface4.8
LEOL4, L53.9
LEOLunar surface6.2
LEOGEO4.0
LEOAsteroids 1982 DB4.5
LEO1982XB, HR, Anteros5.3
MarsLMO4.4

LMO Phobos 0.54
LMO Deimos 0.87
LMO Mars 0.05
LMO Escape 1.43
LMO Earth return 3.4
Phobos LMO/Mars 0.56
Phobos Deimos 0.74
Phobos escape 0.89
Phobos Earth return 2.88
Phobos & DeimosLEO 1.8
Deimos LMO/Mars 0.67
Deimos Phobos 0.74
Deimos escape 0.56
Deimos Lunar Surface2.55
Lunar surface LEO 3.2
GEO synch.LEO4.2
GEO synch.1982 DB0.14
Earth surfaceLEO12
Earth surfaceGEO15