If you are travelling to London on a scheduled flight, it is usually cheaper and more convenient to book your flight straight through to Glasgow. However, if you are travelling on a chartered flight, there is no financial gain in through-booking. By rail Trains to Glasgow from London depart from Euston Station or King's Cross. Virgin Rail also have a Value Return which costs 29 return and 28 single. You must book this at least fourteen days before travel.
Daytime trains have a journey time of approximately five and a half hours.
The cheapest way to travel to Glasgow from London is by coach, and coaches leave Victoria Station in the late evening and early morning. Journey time is approximately eight hours. A limited service is available from Heathrow Airport. Gatwick Airport is connected to Victoria Station by a fast train link which departs every 15 minutes. Journey time is 30 minutes.