Apollo-Soyuz Test Project (ASTP); first joint Soviet–US spaceflight. The two craft dock in space with exchange of flags and gifts. Last manned US mission until STS-1 in 1981.

  Post-Apollo missions using Apollo hardware

Unmanned missions

Mission	Rocket	LV Serial No	Launch Date	Launch Time
Skylab 1	Saturn V	AS-513 minus S-IVB	14 May 1973	17:30 UTC
	Unmanned launch of the Skylab space station. The space station was later crewed by missions Skylab 2, Skylab 3 and Skylab 4.

Manned missions

Mission	Rocket	LV Serial No	Commander	Pilot	Science Pilot	Launch Date	Launch Time	Duration
Skylab 2	Saturn IB	AS-206	Conrad	Weitz	Kerwin	25 May 1973	13:00 GMT	28d 00h 49m 49s
	First crew of the Skylab space station.
Skylab 3	Saturn IB	AS-207	Bean	Lousma	Garriott	28 July 1973	11:10 GMT	59d 11h 09m 34s
	Second Skylab crew. Reaction Control System thruster malfunction nearly necessitated a Rescue Mission.
Skylab 4	Saturn IB	AS-208	Carr	Pogue	Gibson	16 November 1973	14:01 GMT	84d 01h 15m 31s
	Third and final Skylab crew. Penultimate flight of Apollo.
Mission	Rocket	LV Serial No	Commander	CM Pilot	Docking Module Pilot	Launch Date	Launch Time	Duration
Apollo–Soyuz Test Project	Saturn IB	AS-210	Stafford	Brand	Slayton	15 July 1975	12:20 GMT	09d 01h 28m
	Final flight of both Apollo and the Saturn IB. Rendezvous and docking with Soyuz 19 spacecraft. The inadvertent entry of toxic gases into the cabin atmosphere created a potentially life-threatening health risk to the astronauts during re-entry.