They’re not allowed in carry-on. I’ve gotten through a check point with a blade on once, but I’ve also been pulled out and asked to verify there’s no blade. It’s low risk because all you lose is some time and you might have to toss a blade. But then I’m left with a useless razor until I can find a pharmacy to buy whatever crappy generic blades they have, which I then have to dial in for aggressiveness, and it’s just way more trouble than it’s worth.

When I was heavy business traveling, it was absolutely not worth it, because I didn’t pad my airport arrival and boarding time by many minutes, and getting pulled out for a check meant I’d have to run for the gate. Plus, I’d have to make time during the trip to find a pharmacy, pay for an Uber to go get blades. Not worth it.

On the much more rare occasion that I an checking a bag, like for a longer trip, sure; I’ll pack a safety razor or shavette, but then I worry about light-fingered TSA inspectors. Anything stolen from your luggage, you’re never getting back. I have a couple of cheap-o safety’s I wouldn’t mind losing, but they’re not my favorite shaves either.

All in all, for traveling, I just take cartridge razors. It’s easier.