Summer
Tourist season.
June
off season is the best.
Spring and summer for France, last century for UK
Summer (December to March).
If you're a citizen of the UK and need travel insurance, you should check out JSInsurance or moneysupermarket. The latter is one where you can compare a lot of different companies so you can get the coverage and price that is best for you.
The coverage that works best for you depends on the level of coverage you want, and how much you are willing to pay. A smart way of determining the best coverage for travel in the UK is to use a third-party insurance broker.
The best season for travel all depends on where you are traveling to. If going to Europe, tickets tend to be cheaper in the winter but it is cold. If going to, say the Carribean winter time is great. Summer is easier for travel because children don't have school.
I would think that travel over seas wold be the best in the winter because the weather would be better and the costs would be less. I would be wary of travling during hurricane season.
i would say the best way is by areoplane
Yes, Americans can travel to the UK.
Yes, you can travel from the UK to France.