Once again, Ryanair has released their annual charity calendar with proceeds going to Polish charity TVN Foundation.

The notorious calendar, which includes female members of Ryanair's cabin crew in little more than bikinis, hopes to raise €100,000 ($131,000) for the charity, which would bring the calendar's multi-year total to around €600,000, according to the airline.

The calendar is available for purchase on Ryanair flights or through TVN Foundation for £10 ($16).

Check out some of the racy shots from the 2013 calendar, as well as previous years, below.

Photos courtesy of Ryanair unless otherwise noted.

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  • Cover

  • 2013 Calendar back cover

  • October - Lynn Jimenez

  • August - Amy Evans

  • Ryanair CEO Michael O'Leary with the flight attendants

  • With CEO Michael O'Leary

  • Stills from the 2008 calendar. (AFP/Getty Images)

  • Ryanair chief executive launches Cabin Crew Charity Calendar 2011

    Ryanair chief executive Michael O'Leary launches Cabin Crew Charity Calendar 2011

  • Making of the Ryanair Cabin Crew Charity Calendar 2009

    Cabin crew girls in bikinis, planes, music, fun and frolics, Spain 2008. Check out more behind the scenes footage at www.ryanairmag.com

  • Ryanair Cabin Crew Charity Calendar 2010

    The making of the Ryanair Cabin Crew Charity Calendar 2010 on location in Alicante

  • Ryanair Cabin Crew Charity Calendar 2011