I know that this is not exactly answering the question about a particular flight but this is a cost break-down for International Scheduled Services according to IATA. The figures are for 1997 but compared to other years, they are in the same range with some exception. Unfortunately, I do not have newer data.
Here it goes:
Cockpit crew - 7.5%
Fuel and oil - 13.0%
Flight Equipment insurance, depreciation and rental 12.8%
Maintenance and overhaul - 9.6%
Landing charges - 5.3%
En-route charges - 4.3%
Station and ground costs-11.8%
Cabin crew and passenger service - 13.0%
Ticketing, sales and promotion - 16.4%
General and administrative - 6.3%
They all add up to 100%. Although different flights contribute in different proportions, you can expect that the cost of a flight is composed of the same components with the same ratio, except for fuel, and now probably for insurance policies in view of the 9/11 tragedy.
Hope this helps.