For U.S. Lawful Permanent Residents (Green Card holders), the "6 month rule" refers to travel outside the United States.
Many countries require your passport to be valid for at least . If your passport expires sooner than this window, you may be denied boarding by your airline or entry by border officials. 6 Month Rule
Airlines often enforce this rule strictly because they can be fined for transporting passengers who do not meet entry criteria. like the Schengen Area
Some regions, like the Schengen Area , generally require only three months of validity beyond your planned departure date. Permanent Residency (Immigration) 6 Month Rule
