Found ORD-MAD for $1419 in Biz.
https://www.kayak.com/flights/ORD-MA...iness/2adults/
Maybe others will match? I'm not going to pull the trigger due to the long layover for this specific flight. The promotion works out of all TK US Gateways to a large number of destinations.
Promotion details
Ticketing period January 16th 2017 - February 14th 2017
Traveling period February 7th 2017 - February 20th 2017
Early ticketing Tickets must be purchased within one day of making a reservation.
Minimum stay At least three days must pass before a return flight.
Maximum stay A maximum of 14 days may pass before a return flight.