Stonehenge and Oxford are in different directions from London, and doing both in one day sounds ambitious. It works, on one condition: you leave early.
The timing
We collect you from your London hotel at 07:00 and reach Stonehenge at about 09:30. The stones before the crowds are a different experience from the stones at noon, and your entry is booked in advance.
From there the road goes north to Oxford, arriving around 12:30. You get a walking tour of the colleges and the lanes between them, time for lunch, and at about 14:30 the visit to Christ Church College. You are back in London around 19:00.
What you actually see
Stonehenge
A ring of standing stones raised around 2500 BC, by people who moved some of them two hundred kilometres. You don't touch the stones, but the path around them gives you every angle.
Oxford
The oldest university in the English-speaking world, best seen on foot. Your guide takes you through the colleges and the streets between them.
Christ Church College
The hall that the Harry Potter films copied, the cathedral inside the college and the staircase everyone recognises. Entry is included.
Is it worth it?
It is a long day: about twelve hours, much of it in the car. If you only have one day outside London and want both prehistory and the colleges, yes. If you would rather spend longer in one place, tell us: every tour is customisable, and the day can be built around Stonehenge or around Oxford alone.
Included: private vehicle and driver-guide, hotel pick-up and drop-off, timed entry to Stonehenge, booked in advance, entry to Christ Church, the Oxford walking tour, fuel, tolls and parking. Lunch is your own.
