PatrickZ80 wrote:No, as long as both flights use the same terminal you don't have to go through customs. You can just walk from your arrival gate to your departure gate.
British airports are different from American airports in a sense that they have a sterile international area. It has mixed departures and arrivals but the only way to get landside from that area is to clear customs. But you don't need to do that, only passengers bound for London or other domestic destinations do.
It becomes a different story if both flights use a different terminal. Some terminals are connected air side but not all of them.
DFWandOMA wrote:I will be traveling from ATH to DFW next year with a layover in LHR. These flights are on BA/AA. Will I have to go through customs once I land in London? I only have a 1.5 hour layover in LHR, so didn't know if I will have to go through customs in London in addition to Dallas.
hawaiian717 wrote:Heathrow airport has airside shuttle busses to transfer between terminals without having to go through UK customs. Follow the purple Flight Connections signs. You will need to go through a security check at Heathrow.
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