British Airways and Unite the Union have halted talks without reaching an agreement, according to a statement by the TUC, which has been overseeing the talks.
Brendan Barber, TUC's general secretary said: "Despite a prolonged period of negotiations it has not been possible to reach agreement between BA and Unite.
"Both parties will be reflecting on the position and the TUC will be keeping in touch but at this stage no further negotiations are planned."
Unite said the BA "management's offer went nowhere near addressing our members' concerns over crew numbers and service levels", adding that the talks "were further impeded by gratuitously provocative statements by senior BA managers not involved in the negotiations, once more calling into question the company's interest in reaching an agreement".
Unite is expected to hold meetings today (March 11) to make a final decision on strike dates.
The strike must be called by March 15, with the walkout to start no later than March 22.
Willie Walsh, British Airways' CEO, said a strike "will not ground British Airways".
According to Walsh, BA has nearly 6,000 volunteers, including nearly 1,000 who have trained as cabin crew.
"We have been putting plans into place and although we cannot announce the precise schedule we will operate until we know for sure what Unite would do, I can tell you what our plans are.
"We will operate all our flights from London City airport, including long-haul services to New York.
"We will operate all our long-haul flights at London Gatwick, and about half of our short-haul flights.
"At London Heathrow, we will operate a substantial proportion of our long-haul flights and a good number of short-haul flights too, assisted by chartered aircraft with crews from a number of UK and European-based airlines.
"All BA CityFlyer, codeshare and franchise flights will continue to operate as normal.
"We have also arranged to secure seats from other carriers, so thousands more of you can reach your chosen destinations."
www.ba.com www.unitetheunion.org.uk www.tuc.org.uk