Any experience on carrying Humira on flights

I need to carry Humira during my international travel, humira sent me a kit to use it for travel but that kit only with hold coolness upto 8 hours but my journey is overall 36 hours. Humira is recommending me to ask the cabin crew to keep the medication in the fridge once I onboard the flight. Does anyone have experiences to share on this because I am just thinking what if they say no to use refrigerator. I will loose all my medication. I am planning to stay for 4 to 5 weeks…