I need to find a train going to cambridge from london kings cross. There are 70 trains meeting those requirements. What day of the week are you leaving? I need to leave on Saturday and arrive by 17:00. I have a train that fits your criteria Saturday, it leaves at 05:17 and arrives at 06:08. Would you like me to book it for you? No, I need to arrive by 5:00 no 6:00 can you check the schedule again? I have a train that arrives at 16:08. Is that what you are looking for? I need to arrive in Cambridge by 17:00. Booking was successful, the total fee is 18.88 GBP payable at the station . Reference number is : 8602X6OE . Thank you for your help Is there anything else I can help you with?