          FINN
       Yeah, the Ileenium system, that's
       the one -- get us there as fast as
       you can.
      A smiling Finn gives BB-8 a THUMBS UP. BB-8 quickly extends
      his WELDING TORCH and TURNS IT UPWARD, then retracts it.

                      REY
       I'll drop you two at Ponemah Terminal.
       I need the bonding tape, hurry!

                      FINN
       (searching for tape)
       What about you?

                      REY
       I gotta get back to Jakku!

It sounds like she will get them partway to the Resistance, then turn back to Jakku. I don’t think she ever changes her mind, she’s just elaborating on the plan.