Dutch flag carrier KLM has unveiled plans to use recycled cooking oil on 200 flights between Paris and Amsterdam.

The planes will use biokerosene, a fuel derived from used frying oil, which has to be tested to meet the same technical specifications as traditional kerosene.

The oil has been collected from hotels, restaurants and factories before being sent to the US for refining.

KLM first ran tests use biofuel in 2009, when it ran a test flight carrying 40 people.

The 90-minute flight was majority powered by traditional aviation fuel, with just one of the its four engines powered 50 percent by biofuel.

The next set of flights will operate using a 50:50 mix of traditional kerosene and biofuel.

KLM, managing director, Camiel Eurlings, said it was aiming to go much further than that: “The route to 100 percent sustainable energy is enormously challenging. We need to move forward together to attain continuous access to sustainable fuel.”

The biokerosene flights are expected to start in September on some or all of the six flights a day between the two cities, although the company needs authorisation before they can go ahead.