OK Plus members in the Czech Republic, London, or Krakow with a hankering for travel this month are in luck. Through Sept. 30, members can travel between those cities for significantly less.

Between any destination in the Czech Republic and London, roundtrips may be had for 20,000 miles in Travel class, or 35,000 miles in Business class.

Between Krakow and the Czech Republic, roundtrips are going for 15,000 and 25,000 miles in Travel and Business classes, respectively.

Capacity controls do apply, so the sooner you book, the better.