re: Former pack a day smokers, how long after quitting did the cravings finally go away?

A month they are markedly reduced.

I smoked for 20 years. Quit cold turkey

1st 3 days. . .fricking brutal
3-10 days. . .suuuuuucked
2 weeks. . .cravings were more muted and I could ignore them

1 month. . .cravings are more like a passing thought. . .lung capacity noticeably improved.

Been over 15 years since I quit. Get the occasional nagging thought, that's about it.