Iberia has a new summer seat sale for flights within Europe. Flights start as low as 21 EUR for Madrid to Porto and must be booked by Jul 24, 22 for travel until Jun 30, 23 Click here for more details and to book this offer.
Some other cities and one way fares from Madrid include:
- Seville: 25 EUR
- Toulouse: 29 EUR
- Santander: 30 EUR
- Lyon: 39 EUR