Fly from Chicago to Amsterdam for $508 round-trip on LOT.
Searching LOT, we found seats departing ORD on September 12, returning from AMS on September 20.
Other dates are also available for departures from September through March.
See our Chicago ORD fare listings for a complete look at current finds.
Need a room in Amsterdam? Here's what's available for the above dates on Hotelwatchdog.