How to get from London to Cambridge?

Take the train.
Departs London Kings Cross.
Book here: https://www.nationalrail.co.uk/

Getting from London to Cambridge, you have two real choices and both are reasonable. The decision depends on personal choice.

1) British rail has frequent service from various stations in London to Cambridge. The trip takes about 90 minutes and costs around $32. You can check out the options at https://www.britishrail.com/train-tickets/

2) Rent a car and drive the 80 or so minutes or the M-11 or the A-1(M). It will be easier to carry her stuff and may be cheaper than rail for the entire family. There is that driving on the left thing and the hassle of London traffic, but both can be managed.

Study, I guess?!?!

You do not say which Sunday in July, but I see Off-peak tickets from London Liverpool Street for £11.50 each, which is very inexpensive.

1) British rail has frequent service from various stations in London
to Cambridge. The trip takes about 90 minutes and costs around $32.
You can check out the options at
https://www.britishrail.com/train-tickets/

British Rail ceased to be a rail operator many years ago. This is an external site aimed at tourists and I would not trust it to offer the best prices or tickets.

Start any rail journey planning at www.nationalrail.co.uk - it will show all the options and then take you to the correct train operator for the route you want to take.

Thank you! I called National Rail and have all the information. I think that will be the best and easiest option!:-)

Which college will she be at? Some are a little easier to get to from the station than others.

BTW - congratulations to her, and to you.

Cambridge- Magdalene College

Oh yum. What a nice college.

A bit of a walk from the station though, especially with luggage. It is diagonally across Cambridge. Maybe a taxi. It could be done by bus or two buses but a faff.

There is the branch of Fitzbillies just across Bridge Street (becomes Magdalene Street as it crosses the river). I'm sure she will become familiar with their wares.

I visit Magdalene College to visit the Pepys library. Yum.

To expand on a point raised above about rail passes, the BritRail link appears to be connected to Rail Europe, a seller of European tickets but not an operator. Rail Europe is sometimes criticized for showing incomplete schedules. National Rail directs shoppers to the operating companies where tickets can be bought direct from the source.