The following airlines operate from Terminal 1 (T1):

- Aer Lingus
- Aerolíneas Argentinas
- Aeroméxico
- Aerosur
- Air China
- Air Comet
- Air Europa *
- Air France
- Air Malta
- Alitalia
- Blue Air
- Bulgaria Air
- Condor Airlines
- Continental Airlines
- Cubana de Aviación
- Delta Airlines
- EasyJet Airlines
- EasyJet Switzerland
- Germanwings GMBH
- Hola Airlines
- KLM Royal Dutch Airlines
- Lloyd Aeroboliviano
- LOT Polish Airlines
- LTE International Airways
- Lufthansa
- Lviv Airlines
- Meridiana
- My Way
- Norwegian Air Shuttle
- Pluna
- Privilege Style *
- Pullmantur Air
- Portugalia Airlines
- Qatar Airways
- Ryanair
- Santa Barbara Airlines
- Saudi Arabian Airlines
- Scandinavian SAS
- Swiss Air
- Thai Airways International
- Transavia Holland
- Travel Service
- Tunis Air
- US Airways

* Non-Schengen international flights.

The following airlines operate from Terminal 2 (T2):

- Air Berlin
- Air Europa *
- Austrian Airlines
- LTU Intl Airways
- Privilege Style SA. *
- Spanair
- TAP Air Portugal

* Domestic and Schengen flights.

The following airlines operate from Terminal 3 (T3):

- Lagun Air
- Spanair (Barcelona Shuttle only)

The following airlines operate from Terminal 4 (T4):

- Aeroflot
- Air Algerie
- Air Nostrum
- American Airlines
- Avianca
- BA Connect
- British Airways
- CSA Czech Airlines
- Egypt Air
- El Al
- Israel Airlines
- Finnair
- Grupo LAN (LAN Chile) (LAN Ecuador)
- Iberia
- Iberworld
- Luxair
- Malev Hungarian Airlines
- Olympic Airlines
- Royal Air Maroc
- Royal Jordanian Airlines
- SN Brussels
- Syrian Arab Airlines
- Tarom
- Turkish Airlines
- Ukraine International
- Virgin Express
- Vueling

Schengen Flights.
These are flights made between the countries members of the Schengen agreement: Germany, Austria, Denmark, Spain, Finland, France, Greece, Netherlands, Iceland (non-EU), Italy, Luxembourg, Norway (non-EU), Portugal and Sweden. Citizens of these countries can freely cross the borders of the rest of member countries. Travelers must carry ID cards only.