Traveling out of state alone while breastfeeding

I still have a lot of time before this comes up, but I will be flying out of state alone a few times for 2-3 day stints when my baby is around 10-12 weeks old. Right now, he’s almost exclusively breastfed, with an occasional bottle with EBM.

I plan on pumping while I’m gone to keep my supply up, but is there any hope of getting the pumped milk back home with me? Seems pretty impossible with flying (and I probably won’t have access to a freezer), but thought I would ask!

Thanks!