Once your booking is confirmed, you can cancel within 48 hours for a full refund, as long as at least 14 days remain before departure.
Otherwise, the cancellation policy is moderate.

• Cancel more than 7 days before your trip begins: 75% of the booking total is refundable (you pay 25%)
• Cancel 7 or fewer days before your trip begins: 50% of the booking total is refundable (you pay 50%)
  The service fee, and the tax you pay on it, are not refundable. The protection package and other taxes are.

Note: If you still owe some toward the booking total at the time of cancellation, you’ll need to pay the remainder.