The airport is nominally divided into 2 terminals, located 250 metres (820 ft) apart and linked by an internal pedestrian connection both airside and landside. In practice, however, the airside parts of the terminal buildings are not divided into terminal 1 (the former domestic terminal) and terminal 2 (the former international terminal) but to Schengen and non-Schengen areas. The non-Schengen area of terminal 2 is under enlargement and will be ready in by the end of 2009, enabling the airport to receive eight wide-body aircraft at the same time, compared to the current five wide-body gates (of which only two are suitable for Finnair's new Airbus A340).

Airlines Destinations Terminal
Aer Lingus Seasonal: Dublin 2
Aeroflot Moscow-Sheremetyevo 2
Air Åland operated by Nextjet Mariehamn 2
airBaltic Riga 1
Air Berlin Berlin-Tegel, Düsseldorf 2
Air Finland Alicante, Málaga
Seasonal: Antalya, Chania, Funchal [begins 14 February], Hurghada, Las Palmas de Gran Canaria, Tenerife-South 2
American Airlines Chicago-O'Hare [begins 2 May] 2
Austrian Airlines operated by Tyrolean Airways Vienna 1
Blue1 Amsterdam [begins 31 January], Berlin-Tegel, Brussels, Copenhagen, Gothenburg-Landvetter, Kuopio, London-Heathrow, Munich, Oslo-Gardermoen, Oulu, Paris-Charles de Gaulle, Stockholm-Arlanda, Tallinn [begins 31 January], Vaasa, Zürich
Seasonal: Athens, Biarritz, Dubrovnik, Edinburgh [begins 29 April], Kittilä, Kuusamo, Marseille [begins 31 May], Milan-Malpensa, Nice, Pula [begins 28 May], Rome-Fiumicino, Rovaniemi, Split 1
Blue1 operated by Golden Air Kuopio, Oulu, Vaasa 1
British Airways London-Heathrow 2
British Airways operated by Sun Air of Scandinavia Billund 2
City Airline Gothenburg-Landvetter 1
Czech Airlines Prague 2
EasyJet London-Gatwick, Manchester, Paris-Charles de Gaulle 2
Finnair Amsterdam, Bangkok-Suvarnabhumi, Barcelona, Beijing-Capital, Berlin-Tegel, Brussels, Budapest, Copenhagen, Delhi, Düsseldorf, Frankfurt, Geneva, Gothenburg-Landvetter, Hamburg, Hong Kong, Istanbul-Atatürk, Ivalo, Joensuu, Kajaani, Kiev-Boryspil, Kittilä, Kuopio, Kuusamo, London-Heathrow, Madrid, Manchester, Milan-Malpensa, Moscow-Sheremetyevo, Munich, Nagoya-Centrair, New York-JFK, Osaka-Kansai, Oslo-Gardermoen, Oulu, Paris-Charles de Gaulle, Prague, Riga, Rome-Fiumicino, Rovaniemi, St Petersburg, Shanghai-Pudong, Seoul-Incheon, Singapore [resumes 30 May], Stockholm-Arlanda, Stockholm-Bromma, Stuttgart, Tallinn, Tokyo-Narita, Vaasa, Vienna, Vilnius, Warsaw, Yekaterinburg, Zürich
Seasonal Bergen, Krakow, Lisbon, Ljubljana, Toronto-Pearson, Venice Marco-Polo 2
Finnair operated by Finncomm Airlines Bucharest-Otopeni, Joensuu, Jyväskylä, Kuopio, Riga, Stuttgart, Tallinn, Tampere, Turku, Vaasa, Vilnius 2
Finncomm Airlines Gdansk [begins 27 March], Kemi/Tornio, Kokkola/Jakobstad, Norrköping, Pori, Savonlinna, Seinäjoki, Varkaus
Seasonal: Enontekiö, Kuusamo 2
Icelandair Reykjavík-Keflavík 2
KLM Amsterdam 2
KLM operated by KLM Cityhopper Amsterdam 2
LOT Polish Airlines Warsaw 1
Lufthansa Frankfurt, Munich 1
Malév Hungarian Airlines Budapest 2
Nordavia Arkhangelsk [begins 16 December], Murmansk [begins 16 December] 
Norwegian Air Shuttle Alicante [begins 14 May], Barcelona [begins 12 May], Copenhagen [begins 5 May], London-Gatwick [begins 12 May], Málaga [begins 2 May], Nice [begins 13 April], Chania [begins 17 April], Rome-Fiumicino [begins 13 May], Oslo-Gardermoen, Oulu [begins 31 March], Rovaniemi [begins 31 March], Split [begins 14 May], Stockholm-Arlanda 1
Rossiya St Petersburg 2
Scandinavian Airlines Copenhagen, Stockholm-Arlanda 1
Severstal Air Company Petrozavodsk 2
Spanair Barcelona 1
TAP Portugal Lisbon 1
Turkish Airlines Istanbul-Atatürk 2
Ukraine International Airlines Kiev-Boryspil 2

Charter airlines
In addition, the following airlines also have charter operations as of August 2010:

Airlines Destinations
Air Finland Summer seasonal: Antalya, Chania, Samos
Winter seasonal: Bangkok-Suvarnabhumi, Funchal, Hurghada, Las Palmas de Gran Canaria, Marsa Alam, Salzburg, Sharm el-Sheikh, Tenerife-south
Blue1 Summer seasonal: Alghero, Izmir, Kefalonia
Winter seasonal: Innsbruck
Bulgaria Air Summer seasonal: Burgas, Funchal, Malta, Paphos, Varna
Winter seasonal: Funchal, Luxor, Sharm el-Sheikh
Finnair Leisure flights Summer seasonal: Antalya, Athens, Burgas, Catania, Corfu, Chania, Dalaman, Dubrovnik, Enfidha, Faro, Funchal, Heraklion, Jerez de la Frontera, Kos, Larnaca, Malaga, Malta, Nice, Palma de Mallorca, Paphos, Preveza, Rhodes, Rimini, Santorini, Skiathos, Varna, Verona, Zakynthos
Winter seasonal: Arrecife, Cancún, Colombo [begins 12 December], Dubai, Eilat-Ovda, Fortaleza, Fort Lauderdale, Fuerteventura, Funchal, Goa, Ho Chi Minh City, Holgúin, Hurghada, Innsbruck, Krabi, Langkawi, Las Palmas de Gran Canaria, Miami, Monastir, Panama City, Paphos, Phuket, Puerto Plata, Recife, Sharm el-Sheikh, Salzburg, Tenerife-North, Tenerife-South
Freebird Airlines Summer seasonal: Antalya
Nouvelair Summer seasonal: Djerba,
Winter seasonal: Monastir
Primera Air Summer seasonal: Burgas, Chania, Varna
Winter seasonal: Eilat-Ovda, Funchal, Hurghada, Las Palmas de Gran Canaria, Tenerife-South
Sun Express Summer seasonal: Antalya
Thomas Cook Airlines Scandinavia Summer seasonal: Chania, Funchal, Hurghada, Kos, Palma de Mallorca, Preveza, Rhodes
Winter seasonal: Funchal, Las Palmas de Gran Canaria, Porlamar, Phuket, Tenerife-South
TUIfly Nordic Summer seasonal: Chania, Faro, Larnaca, Palma de Mallorca, Rhodes
Winter seasonal: Arrecife, Boa Vista, Krabi, Las Palmas de Gran Canaria, Porlamar, Phuket, Sal, Tenerife-South