Not a lawyer :). USCIS website is pretty informative: https://www.uscis.gov/green-card/after-we-grant-your-green-card/international-travel-as-a-permanent-reside

Not a lawyer :). USCIS website is pretty informative: https://www.uscis.gov/green-card/after-we-grant-your-green-card/international-travel-as-a-permanent-resident https://www.uscis.gov/green-card/after-we-grant-your-green-c... I think it answers a lot of your questions :)