Cosmos is to resume its charter programme from Gatwick to Mombasa, Kenya from May.
The service was suspended at the beginning of the year following civil unrest. The weekly charter operated by Monarch Airlines will resume on May 5.
Its current scheduled programme from Heathrow to Nairobi to serve safari holidays will also continue throughout the summer season.
Head of specialist products Sara Gelder said: “As a direct result of assurances we have received from the Kenyan government and advice from our agents and suppliers on the ground, we believe that Kenya is now firmly open for business.
“We have no doubt that with support from the Kenyan Tourist Board and hoteliers we will be able to offer the most competitive prices in the marketplace. We are confident the programme will very quickly achieve acceptable load factors.”