1. You can fly roundtrip to Zurich, Switzerland, Brussels, Belgium, or Luxembourg for as low as $343 today. Worth usually about $850, this is a basic or light economy ticket offered through Air Canada, Air France, American, Delta, KLM, Lufthansa, and United Airlines. Flights depart from most major American cities, which you can check out a list of here. You have to pay $60 extra for a checked bag each way if you book through Air France, KLM, and Lufthansa, however.