Using flights in the order stated on the ticket.
What does it mean?
If you have purchased a return ticket or a ticket on a connecting service and you do not use the first leg of your ticket, your airline may not let you use the other legs of your journey. For example, if you have a return journey and miss your outbound flight or if you are scheduled to fly on multiple flights but miss the first one, the airline may cancel all of the remaining flights on that ticket. This is because airlines will only let you use the ticket you have purchased in the sequence stated on your ticket, otherwise they may cancel your onward travel.
How does it affect me?
Most airlines advise in their terms and conditions that if you tell them in advance that you will not be using your outbound leg, they will not cancel your onward reservation. In this instance, if there is an increase in the price of your fare, you may be required to pay the difference.
This information is placed in the terms and conditions of the airline, who will always advise of their restrictions on coupon sequence.
You should consider the following: