Six-Month Validity Update - U.S. Customs and Border Protection
For U.S. Lawful Permanent Residents (Green Card holders), the "6 month rule" refers to travel outside the United States. 6 Month Rule
Some regions, like the Schengen Area , generally require only three months of validity beyond your planned departure date. Permanent Residency (Immigration) Six-Month Validity Update - U
Airlines often enforce this rule strictly because they can be fined for transporting passengers who do not meet entry criteria. like the Schengen Area
