Yes, in principle you may take an inflatable lifejacket with CO₂ cartridges on board an aircraft. International dangerous goods regulations allow this, but the airline must approve it in advance.

In short: passengers may carry up to two self-inflating personal safety devices, such as swimming aids or lifejackets. Each device may be fitted with no more than two CO₂ cartridges. In addition, up to two spare cartridges may be carried per device.

The lifejacket may generally be carried in either:

• checked baggage
• carry-on baggage

However, approval from the airline is required. The lifejacket must also be packed in such a way that it cannot be accidentally activated.

The ISO 12402 series for personal flotation devices (lifejackets and buoyancy aids) was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 162, Protective clothing including hand and arm protection and lifejackets, in collaboration with Technical Committee ISO/TC 188, Small craft, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).