London to Cambridge by TrainFast trains to Cambridge Station leave from London King's Cross every half hour. The journey takes about 45 minutes. Standard, off-peak round trip fare is £29.00. Cheaper advance fares may not be available for this journey.
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London to Cambridge by BusBuses from London to Cambridge take 2hr 10min and cost about £17.50. A limited number of "funfare" tickets may be available for advance purchase, online, costing £8.50 round trip. Buses leave hourly between Victoria Coach Station in London and Cambridge Parkside Coach Station.
UK Travel Tip; Early morning coaches and several journeys through the day make a detour to Stansted Airport, adding about an hour to the trip. Bus tickets can be purchased online. There is usually a 50pence booking fee.