There are several ways to travel across London.
​

You can include a return underground journey up to zone 2 when you search for a train:

You can book travel to an overground London station that is not the terminal London station for the route (e.g. Birmingham-Wimbledon). When booked in this way, the ticket includes the journey across London:
​

To travel overground to the terminal London station for the route, select London Terminals instead of a specific London station. (E.g. for Birmingham routes to London, the terminal station is Euston.)

When available, we provide a Travelcard filter in the train search results. Check this filter to show only ticket prices that include a London Travelcard:

The cheapest tickets are at the top of the list. These tend to be Advance tickets if available. When you check the Travelcard filter, the Advance tickets drop out of the list. 

The price of the train ticket can increase dramatically! For example, from:

to:

In this case, we recommend you buy a London Travelcard separately from the train ticket.

A Travelcard allows travel across London for one day in the zones you have paid for. You can use the Travelcard for overhead and underground travel via bus, Tube, DLR, London Overground and National Rail services in London.

You can buy a London Travelcard separately from, or without buying, a train ticket. To do so, open London Travelcards on the Travel homepage.