More than 100 corporates have sent a final plea to BA ceo Willie Walsh to sign a deal with the major GDSs.
The letter is sent on day before the carrier's agreements with Sabre, Amadeus, Galileo and Worldspan end.
The letter, organised by the US-based Business Travel Coalition (BTC), is signed by BA corporate customers from Europe, North America and Australia.
Among them are Philips Electronic, Oracle and Eli Lilly as well as travel associations.
The letter expresses "profound concern" among the companies at reports that if BA does not get a 50% reduction in GDS booking fees, it will add the costs to the price of tickets.
It tells Mr Walsh: "You are directly threatening the loss of your most valuable customers by imposing costs already included in the price of our tickets and hampering technology that is critical to the efficient functioning of our modern corporate travel programmes.
"We urge you to move promptly to conclude your GDS negotiations with your best customers' concerns top of mind."
It also points out that the corporates need a "vast array" of pre- and post trip services
that "your airline website simply cannot accommodate."
These include issues like passenger security and tracking.
It warns Mr Walsh: "Our companies will direct future business to airlines that build their distribution programmes around our preferences; as you are aware, we do have a choice in air travel."
An accompanying document, a BTC Industry Position Paper on distribution, says that the industry is risking content fragmentation which would undermine travel programmes and push up costs for corporates.
Talks between the GDSs and BA are continuing with both the airline saying it is optimistic that it can sign a deal with at least one or two of the GDSs.
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