The 747-300 gabatar da wani sabon madaidaiciya mataki zuwa saman bene, maimakon wani karkace mataki a kan baya bambance-bambancen karatu, wanda ya haifar da dakin sama da kasa don ƙarin kujeru. Ƙananan aerodynamic canje-canje yarda da -300 ta jimlar gudu zuwa Mach 0.85 idan aka kwatanta da 0.84 a kan -200 da kuma -100, yayin da rike da wannan nauyi takeoff. A -300 za a iya sanye take da guda Pratt & Whitney-Royce powerplants da kuma shi ne mafi bayyane bambanci tsakanin -300 da baya model. A gaban da ake yi misali a kan 747-300, da stretched sama bene da aka a baya miƙa a matsayin retrofit, kuma ya bayyana a kan biyu Japan 747-100SR jirage. A 747-300 gabatar da wani sabon madaidaiciya mataki zuwa saman bene, maimakon wani karkace mataki a kan baya bambance-bambancen karatu, wanda ya haifar da dakin sama da kasa domin more kujeru. Ƙananan aerodynamic canje-canje yarda da -300 ta jimlar gudu kai Mach 0.85 idan aka kwatanta da 0.84 a kan -200 da kuma -100, yayin da rikewa da wannan nauyi
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