How often can I travel with a U.S. green card?

Once you obtain lawful permanent resident (LPR) status, you may travel outside the United States without limitation on the number of trips. However, absences of more than six months but less than one year may raise questions regarding the continuity of your residence. Any absence of one year or longer may result in a presumption that you have abandoned your permanent residence. If you anticipate remaining outside the United States for six months or more, it is strongly recommended that you apply for a reentry permit prior to departure.

There is no limit on number of times you can travel. However, you shouldn’t stay outside the U.S. for longer than 6 months at a time.

This will depend on your current status, whether or not you have an AP if no current status and when you plan to travel.

You can make multiple trips abroad per year, as long as none are too long, especially more than 6 months, without good reason. It's important to understand that USCIS and CBP don’t just look at the number of trips you take or how many months you’ve been abroad. The core legal test is whether you’ve abandoned permanent residence, and that depends on intent and whether you can show that the U.S. is truly your permanent home.

You travel with your current passport and conditional PR card, and may travel as often as you want, but two concerns:
* Want to make sure you don’t abandon the PR card inadvertently – continue to pay U.S. taxes on your worldwide income, recommend a reentry permit if you will be gone more than one year (or more than 180 days if traveling very frequently)
* Absences greater than 180 days for any one visit will reset the clock for citizenship
* I-829 will need to be filed 90 days before the two-year anniversary of receiving your conditional PR card.