The labyrinthine canals, the great art, foodie heaven, unique architecture, and arguably one of the most-culturally diverse places in the world makes Amsterdam more than just a "Disney for Adults." Experience it without the crowds during the destination's low and shoulder season in winter and spring—and only from $293 roundtrip!
I found cheap fares for travel on select dates between mid-January and late March, and for $20 more, dates into early May—all with the convenience of nonstop itineraries. These are Basic Economy fares with United, and similar rates and dates were also available on Light Economy with Lufthansa, also operated by United via the carriers' Star Alliance partnership.
Searching United.com, we found seats departing EWR on Sunday, January 19, 2020, returning from AMS on Tuesday, January 28.