Bus travel

Something like 9 hours…check Eurolines website for details. I realize that the bus is inexpensive, but you’ll waste an entire day (and it can’t be very much fun). I believe Eurostar to be the best option all the way around, and you could consider Easyjet as another budget option.

If you take a Eurolines coach, choose the overnight run. You'll save the cost of a night in a hotel and have more daylight hours for sightseeing. But by far the best choice is the Eurostar. It's comfortable, relaxing, and faster than flying. City center to city center in under 2 1/2 hours.