If you want to save some cash on your trip to Sioux City, then listen up! As any experienced traveller will tell you, don't book at the very last minute. Prices are usually more expensive close to the departure date. Also, look around online and compare your options. If your destination has more than one airport, you may be able to pick up an excellent price by flying into a smaller terminal. Finally, be prepared to secure your seat quickly if you stumble on a great deal. It might not stick around for too long. With a bit of knowledge and a little good fortune, the perfect fare can be yours.