About 97% of BA6306 flights head off on time — so if you're taking to the skies from KSIA to Cape Town Intl. Airport (CPT), you can relax in confidence knowing that you will touch down at your destination ASAP. In the rare instance that your British Airways flight is late, you're likely to wait approximately 12 minutes. Due to the air carrier's top-notch service, this route has a star rating of 4.6.