Nadia Eweida claims she has endured victimisation, harassment and punishment since winning her claim of religious discrimination at the European Court of Human Rights in 2013.
The 67-year-old hopes to receive compensation in a fresh employment tribunal claim which gets underway at Watford Tribunal Hearing Centre during a preliminary hearing.
Speaking with Premier in August, she said: "I do not see why I should be bullied or harassed out of a job that I enjoy.
"I'm hoping to make a stand for other colleagues in the same predicament to stand up against bullying and harassment and consequences of speaking out the truth."
Ms Eweida took her claim to judges in Strasbourg five years ago after it was rejected by courts in Britain.
The airport check-in worker was sent home in 2006 for not adhering to British Airways' clothing policy when she wore a silver cross around her neck.
Ms Eweida claims she has "never been forgiven" for bringing her case forward.
Responding to her allegations, a British Airways spokesperson said: "We strongly deny all of these claims.
"We work hard to ensure that all 42,000 staff who work for British Airways are treated fairly and consistently.
"We actively encourage staff to report concerns that they have about safety or their wellbeing, so that these can be discussed with managers."
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