The document compares flight options from Barcelona to London for a school trip. It outlines details for 4 airlines: Vueling, British Airways, EasyJet, and Ryanair. Flight dates, costs, and methods of transportation to the airport are provided for each option. Vueling is selected as the final option with the lowest roundtrip cost of 71.48 euros and a departure time that works for the group. Additional details are provided about accommodations in London at the Hotel INN Limehouse and estimated subway transportation costs to get there.