I want to use Just Airports for a car service from London-LHR and they cost 35 pounds.

Our flight leaves at 10am, and I believe we need to be there at least 3 hours ahead, which means we want to be at LHR by 7am.

Just Airports told me that it takes 35-45 minutes to get from Chelsea to LHR - is that a correct estimate?

So, with that in mind, should we ask them to arrive at our apartment between 6:15-6:25am? Or do we need to leave earlier in order not to catch traffic?

At 6 a.m. there is virtually no traffic in London. So you are fine. I'd ask for a 0615 - 0630 pick up time.

Thanks janisj, as always, for your help!

It should be fine. Don't forget you'll be travelling out of London, in the opposite direction to most people.

Thanks nona1

I have used JustAirports many times and their estimated times are very accurate and based on the day/time/direction you are going.

Note that they have always arrived at least 10 minutes early for us.