Main Terminal
      Aer Lingus Airlines, EI
      Aeroflot Russian Airlines, SU
      Air Baltic Airlines, BT
      Air Berlin Airlines, AB
      Air Canada Airlines, AC
      Air China Airlines, CA
      Air France Airlines, AF
      Alitalia Airlines, AZ
      American Airlines, AA
      Austrian Airlines, OS
      Belavia Airlines, B2
      British Airways Airlines, BA
      Brussels Airlines, SN
      Bulgaria Air Airlines, FB
      Cathay Pacific Airways Airlines, CX
      China Southern Airlines, CZ
      Corendon Airlines, CAI
      Croatia Airlines, OU
      Delta Airlines, DL
      Finnair Airlines, AY
      FlyBE Airlines, BE
      Freebird Airlines, FH
      Iberia Airlines, IB
      Icelandair Airlines, FI
      Japan Airlines (JAL), JL
      KLM Airlines, KL
      LOT Polish Airlines, LO
      Lufthansa Airlines, LH
      Malaysia Airline Airlines, MH
      Norwegian Air Shuttle Airlines, DY
      Nouvelair, BJ
      Onur, 8Q
      SAS Scandinavian Airlines , SK
      Singapore Airlines, SQ
      Sunexpress Airlines, XQ
      Swiss International Air Line , LX
      TAP Air Portugal Airlines, TP
      Thai Airways International Airlines, TG
      Thomas Cook Airlines, FQ
      TUIfly Nordic, 6B
      Turkish Airlines, TK
      Ukraine International Airlines, PS
      United Airlines, UA
      Ural Airlines, U6
      US Airways Airlines, US

More details on airlines from the Helsinki-Vantaa Airport website.

Helsinki-Vantaa HEL Terminal map.

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