Itinerary changes, if permitted by the airline’s fare rules, may incur airline-imposed penalties and/or increased fares. Airline change penalties vary by airline, market and fare rules and typically range between $150 to $250 USD per ticket. If calling Priceline to modify, a $30 USD per ticket priceline service fee will also apply. If allowed, changes are required to be made prior to scheduled departure date. If you fail to fly any segment of your itinerary, most airlines will automatically cancel the remainder of your flights and the ticket will lose all value; no further changes or refunds will be allowed. For further information, please contact your airline.