Does anyone know if the free shuttle train runs 24 hours, if not what time does it start?

1 Answer 1


The free train between terminal 4 and 2/3 is part of TfL Rail's Heathrow-Paddington line. Some services go only to terminal 2/3; others continue to Paddington (and are not free except for the bit between terminals 4 and 2/3).

They run from roughly 5 AM to midnight on most days; 6 AM to midnight on Sundays.

If you're transiting, you probably won't want the train (which is landside of immigration), but the interterminal airside transfer buses, though.

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    I believe the underground is also free between the three Heathrow stations, so the OP could use that from terminal 4 to terminal 2. That has similar operating hours, except that there's some night service, the nights after friday and saturday. Commented Apr 20, 2019 at 22:27
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    @Henrik: Ah, I wasn't aware of that. It looks like one needs an Oyster or contactless card to get through the ticket gates there, even if they won't get charged. Commented Apr 20, 2019 at 22:58

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