Amadeus has told its agents in the UK and Ireland that it will reimburse the £3 per segment surcharge the airline plans to impose on them from next Tuesday (April 10).
In a letter to agents, the GDS said it offer of a compensation package runs from April 10 to May 1. After that the situation will be "reviewed."
It said it was still in discussions with BA and added: "It is still very much our desire to reach agreement with British Airways and to this end we have presented a number of competitive proposals."
Amadeus is the last of the four major GDSs not to have signed a deal on booking fees and charges despite negotiations which have been going on for months.
BA, after it signed its renewal deal with Galileo, said that any agents not using an opt-in programme with a preferred channel would be surcharged £3 per segment from April 10.
Since then it has signed deals with Sabre and Worldspan.
As the UK breaks for Easter today (April 5) until Tuesday (April 10), it looks unlikely that such a deal with Amadeus will be agreed until after the April 10 deadline.
Travellers oppose inflight mobile phone use
A majority of travellers oppose the use of mobile phones on fights, according to the latest Barclaycard Business Travel Survey.
59% of the 4,000 travellers questioned said they did not want phones to be used during flights even if technology made it risk free.
But travellers were increasingly using other aspects of new technology, including online check-in.
Traditional airport check-in at desks was still the most used in 2006 - 76% said they used this method. But this was a drop from 79% for 2005.
But the number using self serve kiosk and mobile/online check-in was rising. 58% used the former compared with 53% in 2005 and 42% the latter compared with 35% the previous year.
Denise Leleux, director of commercial cards, Barclaycard Business, said: "A number of airlines have publicly announced in-flight mobile trials.
"However our research shows that a large number of business travellers are wary.
"This suggests that business people want to preserve this as a time to work or relax without fear of being interrupted, overheard, or having to listen to the person next to them."
* see new jobs on BTE's recruitment site www.businesstraveljobs.com