From colorful houses to world-class art to bicycle-friendly streets, Amsterdam has so much to offer. Now, you can experience Amsterdam without spending a ton on airfare as round-trip flights to the city are starting at $398. Multiple airlines are offering cheap fares to Amsterdam from various U.S. cities. The travel dates for these fares generally fall from January to March and October to November. These discounted fares to Amsterdam will probably only last a couple of days, so we recommend locking down these cheap flights to the European city as soon as possible. EONAYA/GETTY IMAGES Deal basics Airlines: American Airlines, Delta Air Lines, Icelandair, United Airlines and TAP.Routes: From Atlanta;…