Transmission method on the uplink of an aircraft

A method for transmitting data, between an on-board segment on board an aircraft and on the ground, via a plurality of access networks. The on-board segment transmits to the ground information providing the association between the access networks and the corresponding IP addresses of the aircraft via these different networks. This information is used by a segment on the ground to make up and update a look-up table between identifiers of the access network and IP addresses of the aircraft. For transmitting a packet on the uplink, the recipient IP address is selected from IP addresses appearing in the look-up table.