The cheapest flight to Barcelona you can get by boooking 6 days before departure.
The most popular airlines on the route Glasgow - Barcelona: Ryanair (FR).
The cheapest flights you can book on the route Prestwick (PIK) - El Prat (BCN).
Direct flights last about 2h 40min.
Direct flights available 2 days a week - thursday, saturday.
Direct flights: Ryanair (FR).
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