South African Airways has round-trip sale fares of $939 from Washington Dulles to Johannesburg and $959 to Cape Town. Travel Monday through Thursday, from April 3 to May 31. Minimum Sunday-night stay required. Fare on other airlines starts at $1,209 to Johannesburg and $1,351 to Cape Town. Book by Wednesday. Info: 800-521-4845, www.flysaaspecials.com/fares.