Não, você não precisa de visto para um transporte aéreo no Dubai. Apenas para constar, mesmo se você tivesse terminais diferentes no DXB, ainda não precisaria de visto.
TWOV (Transit Without Visa):
Passengers with a confirmed onward ticket for a flight to a third country within 24 hours. They must stay in the international transit area of the airport and have documents required for the next destination.
Fonte: Timatic via Emirates
No entanto, se você tiver um tempo de trânsito superior a 8 horas, também poderá obter um visto de trânsito na chegada e aproveitar.
Visa Issuance:
E-transit visas can be obtained before departure. Passengers must have a printed e-transit visa confirmation and they can transit for a maximum stay of 48 hours.
The passengers must transit for at least 8 hours.
Passengers can obtain a transit visa at Abu Dhabi (AUH), Dubai (DXB), Ras al Khaimah (RKT) or Sharjah (SHJ) for a maximum of 96 hours. The passenger must:
transit for at least 8 hours; and
have onward ticket to a third country; and
have a passport valid for a minimum of 6 months from the arrival date.
Visas are only issued as a part of a transit package together with hotel accommodation and airport transfer.
Fonte: Timatic via Emirates