Don’t waste my time, thank you.
If I search for Santa Barbara to Frankfurt and your website displays a flight and price, then don’t waste my time by telling me that the price is no longer available once I select that flight! I’ve spent the last hour on numerous websites looking for a good ticket price, and nearly every time, I get the “We’re sorry, that flight is no longer available at that price. The new price will be $99,999,999,681.00. Thank you.” If it’s no longer available, then don’t display it!!!
Blöd! (practicing my German)