Kammala jumla mai zuwa: Ricciardo ya fara kakar wasa tare da matsayi na huɗu a Ostiraliya, daga na takwas a kan grid bayan hukuncin wuri uku don saurin gudu a ƙarƙashin yanayin ja. A Bahrain, ya yi rikodin rashin kammalawa bayan gazawar lantarki a zagaye na biyu. Sakamakonsa a gasar Grand Prix ta kasar Sin ta 2018 ya fi kyau, inda ya ci nasara da kusan dakika tara, bayan ya fara na shida a grid. A gasar Grand Prix ta Azerbaijan ta 2018, Ricciardo ya yi yaƙi da na huɗu tare da abokin aikinsa Max Verstappen a rabi na biyu na tseren. Fuskarsa ta gaba ta yi taɓawa sosai da bayan abokin aikinsa, kuma lamarin ya sa direbobin biyu suka yi ritaya. A cikin
2018 Spanish Grand Prix, Ricciardo ya gama na biyar kuma ya kafa rikodin waƙa, duk da juyawa a ƙarƙashin motar aminci ta kamala. Ana shigowa cikin Grand Prix na Monaco na 2018, Ricciardo da Verstappen an dauke su a matsayin waɗanda aka fi so su ci tseren saboda motocin su sun fi ƙarfin motar da kuma saukar da ƙarfi. Ricciardo ya jagoranci dukkan zaman horo guda uku kafin cancanta, ya karya rikodin zagaye tare da kowane zaman. Ricciardo ya sami nasarar tabbatar da matsayi na biyu a cikin aikinsa a Monaco, yana jagorantar kowane zaman da ya cancanta kuma ya sake kafa sabon rikodin zagaye. A cikin tseren, Ricciardo ya yi nasarar dakatar da Ferrari na Sebastian Vettel don samun nasararsa ta farko a Monaco Grand Prix da kuma nasararsa ta farko a Grand Prix daga matsayi na farko, duk da cewa dole ne ya magance asarar wutar lantarki saboda matsalar fitowar wutar lantarki ta MGU-K a duk lokacin tseren.