Many major cities in France, Italy and Netherlands are on sale for prices in upper $400s for travel in March from USA cities where British Airways operates London flights. For example, Nice, France and Venice, Italy are around $460 to $490 round trip from Chicago, Houston, Los Angeles, New York JFK, San Francisco and San Jose.
Amsterdam, Netherlands $457
Jersey, UK $494
Paris, France $491
Milan, Italy $462
Venice $488 *March 13-21
American Airlines ticket for British Airways operated flights
Los Angeles LAX – London LHR – Venice VCE – LHR – LAX
For $110 more, $597.03 round trip, this SFO-Venice, Italy ticket can be booked in Main economy with one free checked bag and upgrade eligibility.