Q: I am currently completing RCIA at my parish but will be out of the country over Easter. Is there another parish that can perform the rites other than during the Easter vigil?
A: Adult baptisms may take place on other dates. RCIA 34/2 says that the bishop may decide whether and when the entire rite may be celebrated outside the usual times. RCIA 27 explains that they may celebrated as far as possible on a Sunday, using the appropriate ritual mass from the missal.
So your catechumen has two options – baptism on another day, not Easter. Or baptism in another church in the country where she going to be on Easter – but that might prove rather difficult to arrange.