The US makes international transfer passenger go through immigration. Avoid the US for international transfers.
Avoid connections through London and Paris airports. Those airports harass passengers by making them go through security even in connections between domestic flights.
Hong Kong makes transfer passengers go through security checks. So does Jakarta.
Singapore and Kuala Lumpur are convenient for international connections.
If you know of any other countries with similarly harsh policies, please let me know (email rms at gnu dot org).
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