Q: I am a student in high school, and typically, my school organizes field trips that require traveling. So is it permissible for me travel without a mahram, but with a group of girls, and teachers?
A: The condition for travel is the company of a Mahram. A woman is not allowed to even travel for Haj/Umrah without a Mahram so this (mentioned above) is definitely not permissible. The teachers are not your Mahram.
Allah Ta’aala knows best.
Moulana Yusuf Laher