Fly nonstop from Chicago to London for $569 round-trip on United.
Searching United.com, we found seats departing ORD on Wednesday, March 22, returning from LHR on Thursday, March 30.
Other dates are also available for travel in March.
See our Chicago ORD fare listings for a complete look at today's finds.
Need a room in London? Here's what's available for the above dates on Hotelwatchdog.