Guernsey's state-owned airline Aurigny has increased its prices to compensate for rises in the cost of fuel.
The company announced on Wednesday that an increase of £2 each way would be applied to all routes immediately.
Malcolm Coupar, Aurigny's Commercial Director, said: "It is unfortunate but unavoidable. We have no alternative.
"Our budgeted fuel costs have risen by 30% so far in 2011 and further increases may be applied should the oil price continue to rise."
Mr Coupar said the idea of the surcharge was to help Aurigny react quickly to any future volatility in fuel prices.
The increase brought the company's fuel and security surcharge to £6 each way on inter-island flights, £8 each way to Dinard in France and £10 each way to East Midlands, Manchester and Stansted airports.