I was surprised to see that the usage references for Kensington Olympia refer to 2006. Since then the London Overground has been added linking Clapham to Watford and particularly North West London to South West London. All this hard work has added a greater audience for the trains running to and from and through Kensington Olympia. With the plans for redevelopment of Earls Court, I think we can anticipate a greater usage of Olympia and greater demand for train services. I also think that is people were sure the service wouldn't be cut arbitrarily - which it is - there would be an even larger local audience for it

The proposal news item from LU/TfL announcing their plans to remove the week day service from December 2011 provides the distances to and from other local stations to Olympia - so you will be able to estimate how long it is to walk.

As a regular user of the Kensignton Olympia District Line service I know that I will miss the week day service tremendously and particularly late at night, in the winter, when it is raining and when I am carry shopping or luggage. So pretty much all the time. Good luck with the walking, let me know which feels like the safest route.