When Is Jetstar Birthday Sale 2025. Jetstar is dropping a massive 20th birthday ‘return for free’ sale on flights from sydney across australia (and the world) 拾 celebrate our 19th birthday with irresistible sale fares to singapore and beyond for your 2025 getaways.

^sale ends 16 december 2025 11:59pm sgt, unless sold out prior. The offer is applied to flights from singapore to: