No. Passports are not required for US citizens to travel by air within the United States.
Yes, US citizens can travel to Australia.
Yes, US citizens can travel to Japan.
Yes, US citizens can travel to Singapore.
Yes, US citizens can travel to Uzbekistan.
Yes, US citizens can travel to the Philippines.
Yes, Russian citizens can travel to the USA with a valid visa.
Yes, US citizens can travel to New Zealand.
Yes, non-US citizens can travel to Cuba. The requirements for them to do so typically include a valid passport, a tourist visa, and compliance with Cuban entry regulations. It is important for non-US citizens to check with their own country's government for specific travel guidelines and restrictions to Cuba.
No, Filipino citizens require a visa to travel to Canada.
No, US citizens cannot travel internationally without a passport.
Yes, Chinese citizens can travel to Taiwan under certain conditions, such as obtaining a travel permit or visa.