If you want to have some extra spending money on your trip to Serris, then listen up! As any seasoned traveller will tell you, don't leave booking until the last minute. Prices are usually more expensive close to the departure date. Also, look around online and compare your options. If your destination has multiple airports, you may be able to score a better price by flying into one a little farther out. Last of all, be prepared to secure your seat quickly if you stumble on a real bargain. It might not stick around for too long. With a bit of know-how and a little good fortune, the perfect fare will be yours.