United has dropped fares to Europe from several US cities. Flights to Amsterdam, Paris, Rome, Madrid, and a few other cities are mostly in the mid-$400s round-trip from a variety of cities across the USA. Fares dip as low as $367 round-trip.
This is unadvertised and may not last very long. Book quickly if something catches your eye. Most third party booking sites have a 24-hour free cancellation policy so you'll have a day to figure out the details.
Travel is available mostly in May and June. A few routes have availability from October through mid-December as well. A 28-day advance purchase and a 7-night minimum stay is required. Some flights may be operated by Star Alliance partner airlines. Click on the links below for full details on each route.
A sample of fares include:
These are the prices you'll find on the major booking sites. Some obscure third party sites may offer slightly lower fares. For more fares, check out our fare pages for all flights to to Amsterdam, Paris, Rome, Milan, Madrid, Barcelona, Lyon, and Nice. Other cities in these countries are likely lower than normal as well.