Yes, if you are connecting at Heathrow airport and travelling between two international destinations, you must clear customs and immigration. You will need to collect your luggage at the first port of entry and then go through security and customs at the international transfer desk. Passengers must have all necessary documents and visas to enter the next country.

Do I need to go through immigration for a connecting flight in London?

Yes, you will need to go through immigration if you have a connecting flight in London. All travelers must pass through immigration and customs when arriving in the UK and when leaving for another destination. You will also need to recheck your luggage and obtain a boarding pass for your connecting flight.

Do you have to go through security when connecting through Heathrow?

Yes, all passengers must go through security when travelling through Heathrow Airport. Passengers are required to present valid photo identification and their boarding pass prior to entering the security checkpoint. All passengers and luggage must go through the security scanners, and any items that are deemed to be a security risk will be confiscated.