Comment by iso1631
1 day ago
ESTAs used to be instant for me, but last time I got one (2023) it took 2 days
The US is particularly bad as you need an ESTA to transit. I had a friend nearly caught out by that on a flight from London to Lima which involved changing in Miami. When changing plane from an international to international flight in most countries you get off a plane, maybe go through security, and then get on another plane. In the US this isn't a thing. You have to immigrate into the country for 20 minutes.
The same rules in Canada and Mexico.
And the UK I think.
No, you land at Heathrow you don't go pass passport control if you change onto another international flight. You go through security and then into the departure lounge.
Obviously if you land at Heathrow and fly out of Manchester then sure you have to immigrate, but not at the same airport.
Same at Dubai and Qatar, Helsinki and Frankfurt, Singapore. and Seoul.
Indeed last time I transited Seoul I stayed in a hotel airside for 12 hours before my next flight.
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