Nairobi, Aug. 12 -- Kenya Airways ranked among the bottom 10 airlines globally for punctuality in July, the world's busiest month for air travel.

This is a sharp contrast to its low-cost subsidiary Jambojet, which was among the best 10, potentially adding pressure on the national carrier as it seeks to improve its competitiveness.

KQ ranked 135th out of 143 carriers that made at least 1,500 flights in July, having completed only 58.73 percent of its 2,925 flights on time, with a cancellation rate of 0.41 percent, according to rankings by OAG, a global air travel data provider.

In the same month, Jambojet achieved an on-time performance of 86.54 percent on its 1,795 flights, making it the 10th best performer globally and the second in A...