Anonymous wrote:The Chunnel ride is like 2.5 hours long and you have to arrive an hour early. Too much transit time for a roundtrip.
For those wondering, post-Brexit, the passport checks to board the train in both directions are more time-consuming, and they scan bags like at an airport. So yes you do have to get there (in both directions) probably an hour beforehand to allow time. The trains are also quite expensive unless booked way in advance- even then it's around $120-150 roundtrip. So if a family of 4 it becomes very expensive for a day.
If you want to see both cities, definitely better to just fly to one city and fly home from the other