Can I cancel connecting flights? It is possible to cancel a connecting flight, as well. If you cancel your connecting flights, you ought to inform British Airways as earlier as possible. Your charge will really rely on the number of flights you that cancel and when you demand this interaction. For instance, did you cancel only one of your connecting flights? Or on the other hand did you cancel all of them? How long did you give ahead of your departure date when you mentioned your cancellation? Was it possibly more than seven days than 7 days early? In any case, if your reservation was with 2 different airlines, British Airways may not be responsible for other airlines' connecting flights. https://www.justcol.com/address/british-airways-bulgaria-office/