Swiss International Air Lines will raise its fuel surcharge again on July 1 to help cushion the impact of record-high fuel prices on its bottom line, the loss-making carrier said on Tuesday.

Swiss, which is being taken over by Lufthansa, said it would raise the surcharge to 53 Swiss francs (USD$41.4) from 48 francs per leg on long-haul flights and to 20 francs (USD$15.6) from 18 for European flights.

Many airlines introduced fuel surcharges in the second half of last year as crude oil prices soared above USD$55 a barrel.

In New York on Tuesday crude for August delivery was trading around USD$59 a barrel, slipping from a record high of USD$60.95 a barrel on Monday.

Earlier this week, partner airline Lufthansa said there were no plans to raise the surcharge paid by customers in its main passenger business after its cargo division raised the charge.