Taking a flight is usually the cheapest way to travel from Glasgow to London when booking ahead of time. However, if you are booking last-minute, traveling from Glasgow to London by bus will likely be the cheapest option. Flights depart from Glasgow airport and arrive at one of London's Heathrow, Gatwick, Stansted, City or Luton airports. Airlines that travel directly from Glasgow to London include EasyJet, RyanAir, and British Airways.

The fastest way to travel from Glasgow to London is by taking a flight. A Glasgow to London flight usually requires only 1:10 h of flight time; however, when transport to and from the Glasgow and London airports are taken into consideration, the journey will take approximately 3 and a half hours. Approximately 30 direct flights travel from Glasgow to London every day.

Taking a flight is the most popular way to travel from Glasgow to London. Taking a flight is at least 7 hours faster than taking the bus and approximately an hour faster than taking the train when travel to and from London and Glasgow's airports is taken into consideration. Taking a flight is also €51 cheaper on average than traveling from Glasgow to London by train. Since flights traveling from Glasgow to London arrive at all of London's major airports it is easy to find a convenient flight no matter where your final destination is located in London.