Is possible to pray salat ul fajr earlier about 5 min before azan? Due to journey and reporting to work early. If not I will definetinely miss salat ul fajr. Please advise.

No you cannot pray before time. You have to pray after it. If you are going to miss it because of your journey then you have to pray it in your journey even if you have to do it by standing or walking or riding. Salaat should not be missed