SSP, which operates food and beverage outlets in travel locations, said it boosted sales by 12.2% in its fiscal third quarter.
Like-for-like sales grew by 2.7% and the company stuck to its guidance for the full year of like-for-like sales growth of between 2% and 3%.
On a constant currency basis, first-quarter sales rose by 13.5%, boosted by net contract gains and the acquisition of TFS, the company's joint venture in India.
"Like-for-like sales growth in the UK and Continental Europe was in line with expectations, driven by the ongoing roll out of strategic initiatives and increasing passenger numbers," the company said.
"In North America sales were driven by robust passenger growth, although at a number of our airports the impact of changes in airline routes and passenger flows seen in the second half of 2017 has continued into the first quarter."
"In the rest of the world (including TFS), we continued to see good like-for-like sales growth."