Jeff Clarke, ceo of travel conglomerate Travelport, said he expected the purchase of Worldspan to be completed this year despite an EC investigation.
The EU said it was conducting an "in-depth" investigation into the proposed purchase of Worldspan by Travelport which also owns another GDS, Galileo.
The EC said an initial investigation had found the acquisition would "give rise to competition concerns on the market for the provision of GDS services to travel service providers (airlines, car rental companies and hotels) in the European Economic Area (EEA) and to travel agents in several Member States (Belgium, Hungary, Ireland, Italy, The Netherlands and UK)."
But Mr Clarke, speaking on a broadcast on his company's first quarter figures, said Worldspan was a "very pro-competitive acquisition."
He added: "This is one where the industry will be stronger; the competitive context in the industry will be improved by this.
"We will have stronger technology and be a better competitor to a player as dominant as Amadeus in this market."
The results of the EC investigation are likely to be announced in the summer.
Travelport's figures for the first quarter of 2007 showed a 5% rise in revenue to $668m and a pre-tax profit of $99m, an 8% rise on the figure for the same period in 2006.
Galileo's figures showed a 3% rise in net revenue from $404m to $413m but a 12% drop in pre-tax profits from £132m to $117m.
Orbitz Worldwide, Travelport's online agency, showed a 12% rise in net revenue from $185m to $207m and an 18% rise on pre-tax profits from $15m to $17m.
GTA showed a 4% rise in net revenue form $62m to $64m.
Mr Clarke said: "Travelport is off to an excellent start in 2007. We achieved strong performance driven by both top line revenue growth and cost control through our re-engineering efforts."
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