Cost and time trade-offs
The advance ladder is where the savings live. Tickets go on sale up to a year ahead, with the deepest £10 discount for bookings made 30 or more days before travel and smaller discounts closer to the date. Advance singles are tied to a specific day and are not refundable, so they suit booked flights rather than flexible plans. The £26 walk-up single stays fully flexible, and returns allow outbound travel up to five days after purchase with the return leg within one month.