British Airways Refunds

In case you have bought an air ticket from BA and the carrier makes significant change to its scheduled departure time or the change is not acceptable to you or we are not able to provide reservation to another flight which you are willing to fly on, in all these cases BA will make voluntary refunds of the tickets.

In case of delay of flight by 5 hours or more, cancellation, failure to stop at your destinations or stop over or causing you to miss out on a connecting flight, you can opt for any one of these  three:
  1. BA will make arrangement for your travel on its another flight, as soon as possible, and in the same cabin class, without taking any extra charge. Ticket validity will be extended where needed. 
  2. BA will carry you to same destination at a later date within the validity period of your ticket on another of its scheduled carriers. Fare class will be same as well.
  3. BA gives refund

Refunds will be provided to the full value of ticket if you have not used any part of the ticket.
 
However, if you have used any part of the ticket, then the amount of refund will be difference between the fare and any surcharges, taxes, fees paid and the fare (+taxes + surcharge + fees + other travel charges) for which you have used the ticket. 
There is a provision for providing compensation in cases of denied boarding as well. The compensation will be provided only if you have bought a valid and confirmed ticket and have checked in within stipulated time.