TransitLayover in London Layover in London

I think the way you put it is totally fine but here is an alternative. We often call it a "stopover" or a "layover". Eg. Stopover in London Eg. Layover in London

At last, in just one month, I’ll be leavtravelling forto the Czech Republic with my two daughters. At last, in just one month, I’ll be travelling to the Czech Republic with my two daughters.

“Leaving for” is understandable, but “traveling to” is the more natural phrase. It emphasizes the journey rather than just the act of leaving.

At last, iIn just one month, I’ll finally be leaving for the Czech Republic with my two daughters. In just one month I’ll finally be leaving for the Czech Republic with my two daughters.

Sentence is correct, but changing the phrasing to "In just one month I'll finally be leaving..." sounds less stiff.

Before arriving in Prague, we’ll have a transit stop in London. Before arriving in Prague, we’ll have a transit stop in London.

You can also say: "We'll be making a transfer/stopover at London" or "There'll be a layover at London"

Before arriving in Prague, we’ll have a transit stoplayover in London. Before arriving in Prague, we’ll have a layover in London.

“Layover” is the standard travel term used when you stop in one city before continuing to your destination.

We’re scheduled to arrive early in the morning and then fly to Prague at 3:00 p.m. We’re scheduled to arrive early in the morning and fly to Prague at 3:00 p.m.

Removing then makes the sentence smoother. “Arrive … and fly” already shows sequence, so “then” is redundant.

Our staylayover in London will be about nine hours, though we plan to be back at the airport by 1:00 p.m. Our layover in London will be about nine hours, though we plan to be back at the airport by 1:00 p.m.

Sentence is correct, and this feedback might be strictly American phrasing, but a more common way to say it could be "Our layover in London".

My older daughter has been wanteding to visit London for many years, so, as much as possible, I’d like to take her to as many places as she wishes, as much as possibleants. My older daughter has been wanting to visit London for many years so, as much as possible, I’d like to take her to as many places as she wants.

Your sentence is grammatically correct. This is just alternate phrasing that is slightly more natural in my subjective opinion.

My older daughter has wanted to visit London for many years, so I’d like to take her to as many places as she wishes, as much as possible. My older daughter has wanted to visit London for many years, so I’d like to take her to as many places as possible.

“as many places as possible” already conveys the idea of fulfilling her wishes.

My older daughter has wanted to visit London for many years, so I’d like to take her to as many places as she wishes. Well, as much as possible. My older daughter has wanted to visit London for many years, so I’d like to take her to as many places as she wishes. Well, as much as possible.