All flights that stop in the USA require passengers to go through USA immigration and customs ! You either need a VISA waiver(ESTA) or a VISA.
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Regular visa-free travel allows travelers to move freely across borders with their passports. While you usually don't need more than a passport to clear customs in most visa-free countries, certain countries may request other documents, such as proof of onward travel, before allowing you to enter.
Valid for entering the United States from Canada, Mexico, the Caribbean, and Bermuda at land border crossings or sea ports-of-entry. A passport card can be used as ID for domestic flights. It cannot be used for international air travel.
Singapore has taken first place on the latest Henley Passport Index 2023 rankings. Singaporeans enjoy visa-free access to 192 travel destinations out of 227 worldwide. With Japan falling to third place, three European countries tie in second place: Germany, Italy and Spain with visa-free access to 190 destinations.
If you overstay the end date of your authorized stay, as provided by the CBP officer at a port-of-entry, or United States Citizenship and Immigration Services (USCIS), your visa will generally be automatically be voided or cancelled, as explained above.
Travel destinationPassport cards, however, can only be used going through a land border or seaport in Canada, Mexico, the Caribbean and Bermuda. For example, if you're planning a Mediterranean cruise, you'll need to use a passport book. The card isn't valid for seaport entry in Europe.