Terminal 1  [map]
      Adria Airways Airlines, JP
      Aegean Airlines, A3
      Aeroflot Russian Airlines, SU
      Aerolineas Argentinas Airlines, AR
      Air Algerie Airlines, AH
      Air Baltic Airlines, BT
      Air Berlin Airlines, AB
      Air Canada Airlines, AC
      Air China Airlines, CA
      Air Europa Lineas Aereas Airlines, UX
      Air France Airlines, AF
      Alitalia Airlines, AZ
      American Airlines, AA
      Arkia Israeli Airlines, IZ
      Austrian Airlines, OS
      Avianca Airlines, AV
      Azerbaijan Hava Yollary Airlines, J2
      BA CityFlyer Airlines, CJ
      British Airways Airlines, BA
      Brussels Airlines, SN
      Croatia Airlines, OU
      Czech Airlines, OK
      Delta Airlines, DL
      Egyptair Airlines, MS
      El Al Airlines, LY
      Emirates Airlines, EK
      Finnair Airlines, AY
      Iberia Airlines, IB
      Israir Airlines, 6H
      KLM Airlines, KL
      Korean Air Lines Airlines, KE
      LOT Polish Airlines, LO
      Lufthansa Airlines, LH
      Niki Airlines, HG
      Qatar Airways Airlines, QR
      Royal Air Maroc Airlines, AT
      Royal Jordanian Airlines, RJ
      S7 Airlines, S7
      SAS Scandinavian Airlines , SK
      Singapore Airlines, SQ
      Swiss International Air Line , LX
      TAP Air Portugal Airlines, TP
      TAROM Romanian Air Transport , RO
      Tunis Air Airlines, TU
      Turkish Airlines, TK
      Ukraine International Airlines, PS
      United Airlines, UA
      Vueling Airlines, VY
 
Terminal 2B  [map]
      Aer Lingus Airlines, EI
      Air Arabia, G9
      Air Moldova Airlines, 9U
      Air Transat Airlines, TS
      Atlantic Airways Faroe Islands Airlines, RC
      Aurigny Air Services Airlines, GR
      Belavia Airlines, B2
      Blue Air Airlines, 0B
      Bulgaria Air Airlines, FB
      Eurowings Airlines, EW
      Germanwings Airlines, 4U
      Icelandair Airlines, FI
      Jet2com Airlines, LS
      Jetairfly Airlines, JAF
      Luxair Airlines, LG
      Monarch Airlines, ZB
      Norwegian Air Shuttle Airlines, DY
      Pegasus Airlines, PC
      Ryanair Airlines, FR
      SkyWork Airlines, SX
      Small Planet, T9
      Sun D Or Airlines, ERO
      Transavia Airlines, HV
      Ural Airlines, U6
      Wizzair Airlines, W6
      Wow Air, X9
 
Terminal 2C  [map]
      EasyJet Airlines, U2
      Easyjet Switzerland Airlines, DS


More details on airlines from the Barcelona Airport website.

Barcelona BCN Terminal map.

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