If you try to do research on this question, you won't get any proper answers on the entire web. Basically you will have to understand the concept and figure it out on your own.Below are the thumb rules to check: a) Check the official immigration website of the country and see if they have a rule that you should have 6 months of validity while you arrive or depart. b) See if you have a layover in a third country with just transit at the airport or if you will exit the airport. If it is an exit, then check this country's rules also. c) 99.9% of countries accept their nationals without the 6-month validity rule, however, your passport should be valid and not expired while you return. Check about your country. d) While retuning when there is less than 6 months validity in your passport, if you have a layover with exit in a 3rd country you wont be allowed to travel at first. If you are not exiting the layover countries airport then you should be allowed to travel to your home country. e) You will never be allowed to travel to any country instead the home country if passport validity is less than 6 months and that country follows this 6 months law.