Continental Airlines has pledged to step up efforts to help travel buyers report on unbundled airfares.
Jeff Smisek, the airline's charismatic chief executive, said that ancillary revenues were "very important" to airlines, but that he understood problems faced by travel management companies and travel buyers when it came to financial reporting on air spend.
"We know there are reporting issues," he acknowledged, "but were are working to make it happen."
"We are more nimble (on the Continental website) than the global distribution systems (GDSs) when it comes to booking airfares and ancillaries.
"But we are working hard with the GDSs and corporate credit card companies because we want to be on all distribution channels," he said.
Smisek said the airline would be participating in a National Business Travel Association (NBTA) working party to discuss the issue.
Continental also recently launched a credit card in association with US bank Chase which can be used by corporates and their travellers to avoid paying baggage charges.
"I understand the importance of transparent pricing. But it's our view that ancillary revenues are important for airlines and they are fair on customers," said Smisek.
"We want customers to be able to opt in to the air fare, not opt out. It's not fair that passengers checking luggage subsidise those travelling without."
Smisek also dismissed suggestions that Continental's recent merger with United, making it the world's largest carrier alongside Delta - Northwest, would lead to a shrinking network.
He said: "We only overlap on 15 routes world wide, so United is not really a competitor. This merger is different. The networks compliment each other which is good for the business traveller."
He said redundancies at airline headquarters would be inevitable, but that little would change for front-line staff.