Heathrow (LHR) for speed to Paddington
Heathrow Express and Elizabeth line connect to central London quickly—great when your hotel is west or central. Peak-hour crowds are real; pad time after landing.
Gatwick (LGW) and the south
Gatwick Express / Thameslink into Victoria or London Bridge works well for south London and some City hotels. Compare total door-to-door time, not just airfare.
Immigration queues
US visitors use eGates when eligible—still carry hotel address and trip details in case an officer asks.
Two airports on one ticket
If you fly into LHR and out of LGW, treat it as a self-transfer city—allow a half-day buffer for delays and bag moves.
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