If you'd like to save some cash on your trip to Groningen, listen up! As every experienced traveller will tell you, don't book at the very last minute. Prices are usually highest close to the departure date. Also, do some online research and compare your options. If your destination has several airports, you may be able to nab a terrific price by flying into one that's further away. Last of all, another easy way to save some cash is be ready to book at a moment's notice. If you find a fantastic bargain, don't think twice — snap it up while the opportunity's there.