IN TIME VS. ON TIME

These expressions are very similar, but there is a slight difference in meaning.

On time
On time means that there is a specific time established when something is supposed/expected to happen, and it is happening at the planned time.

• I want to start the meeting on time so please don’t be late.
• The 11.45 train left on time.

In time
If we say we arrived in time, we’re saying that we got there a little early – that there was time to spare.
We often use the structure in time to do something:

• We arrived in time to get some drinks before the show started.
• Will you be home in time for dinner?