Madrid: €73 Oneworld Flights From UK, Belgium & Portugal (€109 With Luggage)

InFlight Madrid-Barajas Airport

Oneworld member Iberia is offering cheap flights to Madrid from London, Brussels, and Lisbon. Prices start at €73 for a fare without luggage. If you’re flying from London, you can also fly with British Airways. Availability is very high. Adding luggage costs another €35.