New-look uniforms will be worn by almost 6,000 Jet2.com cabin crew and pilots ahead of the summer peak flying schedule.
The first major change in more than 20 years follows 18 months of staff consultation.
As a result, pilot uniforms switch from black to navy blue and cabin crew clothing has been modernised.
Waistcoats and cardigans have been introduced using better fabrics for more comfort, as well as a new apron designed by Newcastle airport-based cabin crew member June Winter.
The new uniform incorporates fibres made from recycled materials and will be delivered to Jet2.com colleagues in fully recyclable packaging.
Up to 80,000 garments from old uniforms will be recycled into new materials, with more than 3,000 that cannot be recycled being donated to charity.
Head of cabin services Micki Miles said: “Since the launch of Jet2.com in 2003, our uniform has seen subtle changes, but this is the first major new design which represents a significant change and will ensure that we stay on-brand and stylish for many years to come.
“This new look and feel has been driven by Jet2.com colleagues, with 18 months’ worth of feedback and wearer trials helping us to develop a brand-new uniform that not only looks incredible, but addresses comfort and practicality too.
“We know that our colleagues and customers will love this new uniform, and it will really take us forward as we continue looking after customers on their award-winning flights and holidays with us.”