A can of Fix-a-Flat takes lots less room than a spare tire. And it also inflates, which beats the heck out of finding your spare has only 15 lbs of air - an all-too-common malady for tires that don't get used much. One big reason most auto makers are eliminating spare tires in new vehicles:
https://www.usatoday.com/story/money...res/777871001/
I've fixed at least four flats with Fix-a-Flat. Hard to believe it's so simple: just hook it on your valve stem and two minutes later you're on the road. It worked so well I never bothered to follow up with a "real" repair.
For tires too damaged for Fix-a-Flat, I call my insurance company's roadside assistance hotline and they bring me a new tire. Never had to resort to that however.