DOW JONES NEWSWIRES 
 

Delta Air Lines Inc. (DAL) has been denied permission for direct flights to Nairobi, Kenya and Monrovia, Liberia until the airports meet security standards or until U.S. regulators change their assessment of security threats in the region.

The Transportation Security Administration called the current threat to civil aviation in east Africa too significant to allow the flights, but said it will continue to monitor the situation. The routes were slated to begin within days.

Delta was notified by TSA and the Department of Homeland Security that the agencies will need more time before clearing the requests, without giving a specific timetable. In the meantime, Delta said it is working to accommodate customers on its connecting flights or through its joint venture partners.

"Africa continues to be an important region for Delta," the airline said. "Delta is the only airline offering scheduled service between the United States and Africa, currently serving six destinations in five countries."

The TSA said it denied Delta's 2008 proposal to begin air service to the two cities, after security assessments at the airports. TSA approved an accompanying request to fly into Abuja, Nigeria. However it noted security vulnerabilities in and around Nairobi, as well as the failure to meet safety recommendations set by the International Civil Aviation Organization at Roberts International Airport in Monrovia.

Kenya Foreign Affairs Minister Moses Wetangula told Reuters on Wednesday that the government has summoned the U.S. ambassador to Kenya to explain the last-minute cancellation.

While Delta and other major airlines have been cutting capacity amid a slump in consumer and business travel, Delta has been trying to expand its international reach, forging an alliance with Franco-Dutch carrier Air France-KLM (AFLYY) in April.

Delta shares recently were recently down 1.3% at $6.79. The stock is down 41% this year.

-By Tess Stynes, Dow Jones Newswires; 201-938-2473; tess.stynes@dowjones.com