Heathrow is one of the world's busiest international airports, spread across several terminals that each serve different airline alliances.
Terminal and connection planning for London Heathrow.
Heathrow is one of the world's busiest international airports, spread across several terminals that each serve different airline alliances.
Confirm your specific terminal ahead of time, since Heathrow's terminals are not all connected airside and some transfers require going through security again.
The Elizabeth line and Heathrow Express both connect to central London quickly, generally more predictable than a taxi during peak traffic.
For connections, check whether both flights use the same terminal or an airside-linked one — some Heathrow transfers require exiting and re-entering security.
Given Heathrow's size and typical security wait times, build in generous buffer, particularly for international departures.
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Which terminal your specific airline uses, since Heathrow's terminals aren't all interconnected airside.
Compare Heathrow against Gatwick if your route offers a choice, on fare and connection convenience.
Your connection time if changing terminals, and current rail options into central London.
Holiday travel weeks see the heaviest congestion and longest security lines.
Terminal transfer requirements and traffic conditions for ground transport.
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