Yeah, so tomorrow I’m going on a trip and I was wondering if I could combine my Dhuhr with Asr right before I leave because when I arrive to the other city it will be Maghrib.
Islamqa has answer for you:
... it is permissible for you to bring ‘Asr forward and pray it with Zuhr in your home city, if you think it most likely that you will not be able to pray it on time because of travelling.
The answer is: "Yes. You can."