In case the scheduled flight got canceled, then the passengers will get the full amount as a refund, or else there is an option to opt for re-book the ticket to the same destination. But in some cases, passengers will get the other benefits like if passenger booked a hotel or ordered any meal, then those amounts will also be refunded by the airlines. In case of canceling the trip journey in middle, then the refund applicable to the remaining trip only. The amount will be credited into the passenger’s account directly.
To get your money back you will have to fill a refund form. Suppose you have a ticket for a round trip and you have to travel one way than in such case you can cancel one. You will be refunded only the part that you have not used. Do not think that your all fees for the round trip will come back. In the case of Europe, you are not going to get a refund. You will get there only if you are a SAS plus member.