Abstract: Apparatuses, methods, and systems are disclosed for RTT determination based on analytics. One apparatus includes a processor that establishes a multiaccess data connection with a UPF in a mobile communication network. The multiaccess data connection enables data communication via a non-3GPP access network and via a 3GPP access network. The apparatus includes a transmitter that transmits a first performance measurement functionality message to the UPF. The first performance measurement functionality message triggers a request of a first type of analytics from a network data analytics function. The apparatus includes a receiver that receives a second performance measurement functionality message from the UPF in response to the network data analytics function providing the first type of analytics. The second performance measurement functionality message contains estimated RTT values for the non-3GPP access network and/or the 3GPP access network.