Travel on Thursdays-Sundays is an additional $55 each way. Plan to stay one weekend or up to one year. Buy tickets through April 10.
Service is via Chicago on the outbound; London on the return. Stopovers are not permitted.
Sale airfares are always subject to change. Every seat on every flight is not offered at the lowest rate.
Since only a limited supply of seats is available, act quickly to make your purchase. I recommend starting the search for available seats at Kayak.com vs. calling an airline directly. You can also search for the sale at travel Web sites such as Expedia or Travelocity, etc.
Clara Bosonetto is a retired travel consultant.