| DEN–MSP | Denver – Minneapolis | 695 |
| CPH–KEF | Copenhagen – Reykjavík | 254 |
| KEF–OSL | Reykjavík – Oslo (Gardermoen) | 157 |
| JFK–KEF | New York – Reykjavík | 151 |
| KEF–LHR | Reykjavík – London | 141 |
| KEF–YYZ | Reykjavík – Toronto | 137 |
| HEL–KEF | Helsinki (Vantaa) – Reykjavík | 133 |
| AMS–KEF | Amsterdam – Reykjavík | 132 |
| KEF–SEA | Reykjavík – Seattle | 124 |
| KEF–ORD | Reykjavík – Chicago | 121 |
| AEY–RKV | Akureyri – Reykjavík | 121 |
| FRA–KEF | Frankfurt am Main – Reykjavík | 114 |
| CDG–KEF | Paris (Roissy-en-France, Val-d'Oise) – Reykjavík | 109 |
| KEF–MXP | Reykjavík – Ferno (VA) | 107 |
| KEF–MSP | Reykjavík – Minneapolis | 103 |
| IAD–KEF | Dulles – Reykjavík | 94 |
| BOS–KEF | Boston – Reykjavík | 89 |
| ARN–KEF | Stockholm – Reykjavík | 88 |
| EWR–KEF | Newark – Reykjavík | 86 |
| EGS–RKV | Egilsstaðir – Reykjavík | 77 |
| KEF–MUC | Reykjavík – Munich | 73 |
| DEN–KEF | Denver – Reykjavík | 63 |
| BWI–KEF | Baltimore – Reykjavík | 63 |
| KEF–ZRH | Reykjavík – Zurich | 59 |
| BCN–KEF | Barcelona – Reykjavík | 57 |
| KEF–LGW | Reykjavík – London | 55 |
| KEF–RDU | Reykjavík – Raleigh/Durham | 52 |
| GDN–KEF | Gdańsk – Reykjavík | 51 |
| DUB–KEF | Dublin – Reykjavík | 50 |
| BER–KEF | Berlin – Reykjavík | 49 |
| KEF–PDX | Reykjavík – Portland | 48 |
| GLA–KEF | Glasgow – Reykjavík | 47 |
| ALC–KEF | Alicante – Reykjavík | 45 |
| FCO–KEF | Rome – Reykjavík | 44 |
| KEF–MCO | Reykjavík – Orlando | 43 |
| BRU–KEF | Zaventem – Reykjavík | 42 |
| KEF–YVR | Reykjavík – Vancouver | 39 |
| BNA–KEF | Nashville – Reykjavík | 38 |
| KEF–TFS | Reykjavík – Tenerife | 37 |
| KEF–LGG | Reykjavík – Grâce-Hollogne | 36 |
| KEF–MAN | Reykjavík – Manchester, Greater Manchester | 35 |
| IFJ–RKV | Ísafjörður – Reykjavík | 33 |
| FAE–KEF | Vágar – Reykjavík | 33 |
| BGO–KEF | Bergen – Reykjavík | 29 |
| HFN–RKV | Höfn – Reykjavík | 27 |
| BLL–KEF | Billund – Reykjavík | 26 |
| EDI–KEF | Ingliston, Edinburgh – Reykjavík | 24 |
| KEF–LIS | Reykjavík – Lisbon | 24 |
| KEF–VCE | Reykjavík – Venezia (VE) | 23 |
| KEF–NCE | Reykjavík – Nice, Alpes-Maritimes | 21 |
| KEF–PIT | Reykjavík – Pittsburgh | 21 |
| GOH–KEF | Nuuk – Reykjavík | 21 |
| KEF–PRG | Reykjavík – Prague | 17 |
| KEF–KUS | Reykjavík – Kulusuk | 14 |
| KEF–YHZ | Reykjavík – Halifax | 14 |
| AGP–KEF | Málaga – Reykjavík | 13 |
| KEF–RKV | Reykjavík – Reykjavík | 11 |
| CNP–RKV | Neerlerit Inaat – Reykjavík | 11 |
| FAO–KEF | Faro – Reykjavík | 10 |
| JJU–KEF | Qaqortoq – Reykjavík | 10 |
| JAV–KEF | Ilulissat – Reykjavík | 9 |
| GVA–KEF | Geneva – Reykjavík | 7 |
| CNP–KEF | Neerlerit Inaat – Reykjavík | 5 |
| FNC–KEF | Funchal – Reykjavík | 4 |
| KEF–XRY | Reykjavík – Jerez de la Frontera | 4 |
| EGS–GLA | Egilsstaðir – Glasgow | 2 |
| GLA–RKV | Glasgow – Reykjavík | 2 |
| KEF–RMU | Reykjavík – Corvera | 2 |
| IAD–RAK | Dulles – Marrakesh | 2 |
| RKV–SFJ | Reykjavík – Kangerlussuaq | 2 |
| CNS–SAIonce | Cairns – Siem Reap | 1 |
| KTM–LKOonce | Kathmandu – Lucknow | 1 |
| AGR–JROonce | Agra – Arusha | 1 |
| JJU–RKVonce | Qaqortoq – Reykjavík | 1 |
| CAI–JROonce | Cairo – Arusha | 1 |
| CAI–RAKonce | Cairo – Marrakesh | 1 |
| KUS–RKVonce | Kulusuk – Reykjavík | 1 |
| LJU–RMUonce | Zgornji Brnik – Corvera | 1 |
| GLA–LJUonce | Glasgow – Zgornji Brnik | 1 |
| KEF–LAXonce | Reykjavík – Los Angeles | 1 |
| KEF–TASonce | Reykjavík – Tashkent | 1 |
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