QUICK ANSWER
The free train connects T1, T3 and Viscount.
01
Travel time
Pearson publishes station travel of roughly two to eight minutes.
02
24 hours
The airport lists 24-hour service, with varying maximum waits by time period.
03
Connection process
A terminal change can still include security or border steps depending on itinerary.
Frequently asked questions
Is Terminal Link free?
Yes. Pearson describes it as free and accessible.
Does Terminal Link run 24 hours?
Yes, subject to service updates and maintenance.
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Sources and verification
Time-sensitive airport, airline, visa, security and transport details should always be confirmed with the relevant official source before travel.