Uncrewed spaceflights to the International Space Station (ISS) are made primarily to deliver cargo, however several Russian modules have also docked to the outpost following uncrewed launches. Resupply missions typically use the Russian Progress spacecraft, i.e., Progress-M (Standard and Modified), Progress-M1 and Progress MS series vehicles, European Automated Transfer Vehicles, Japanese Kounotori vehicles, and the American Dragon 1 and 2 vehicles and Cygnus (Standard, Enhanced and XL series) spacecraft. The primary docking system for Progress spacecraft is the automated Kurs system, with the manual TORU system as a backup. ATVs also use Kurs, however they are not equipped with TORU. The other spacecraft — the Japanese HTVs and HTV-Xs, the SpaceX Dragon (under CRS phase 1) and the Northrop Grumman Cygnus vehicles — rendezvous with the station before being grappled using Canadarm2 and berthed at the nadir port of the Harmony or Unity module for one to two months. Progress, Cygnus and ATV can remain docked for up to six months. Under CRS phase 2, SpaceX Cargo Dragon docks autonomously at IDA-2 or 3 as the case may be. As of September 2026, Progress spacecraft have flown most of the uncrewed missions to the ISS.
To avoid confusion, this list includes Soyuz MS-23, which was launched uncrewed and landed crewed, but does not include Soyuz MS-22 and Boeing Crewed Flight Test, which was launched crewed and landed uncrewed, which is listed at List of human spaceflights to the International Space Station.
Current and completed spaceflights
This is a list of uncrewed spaceflights to the International Space Station.
Key to box background colors: Module launch Launch failure, spacecraft did not reach orbit Partial failure, spacecraft reached orbit but did not rendezvous with ISS
Note: Russia has delivered cargo via the uncrewed missions of Progress since the launch of the ISS, while the U.S. had used Space Shuttles for hybrid human/cargo missions, resulting in a greater number of Russian uncrewed flights to the ISS. Since the discontinuation of the Space Shuttle program in 2011, the numbers of crewed and uncrewed flights by the U.S. and Russia are more closely matched.