Here are a list of some of the airlines flying into Croatia:
Aer Lingus - www.aerlingus.com
Adria Airways - www.adria.si
Aeroflot - www.aeroflot.ru
Air Berlin - www.airberlin.com
Air Mediterranee - www.air-mediterranee.fr
Air Nostrum - www.airnostrum.es
Air Serbia - www.airserbia.com
Austrian Airlines - www.austrian.com
British Airways - www.britishairways.com
Condor - www.catchafly-t.com/fp-eu/
Croatia Airlines - www.croatiaairlines.com
Czech Airlines - www.csa.cz
Easyjet - www.easyjet.com
Edelweiss - www.flyedelweiss.com
Enter Air - www.enterair.pl
Europe Airpost - www.europeairpost.com
Finnair - www.finnair.com
Germania - www.flygermania.com
Germanwings - www.germanwings.com
Jet2com - www.jet2.com
Lufthansa - www.lufthansa.com
Malmo Aviation - www.malmoaviation.se
Minoanair - www.minoanair.com
Mistral Air - www.mistralair.it
Norwegian - www.norwegian.no
Nova Airlines - www.novair.net
Ryanair - www.ryanair.com
Scandinavian Airlines - www.flysas.com
SkyWork Airlines - www2.flyskywork.com
Small Planet Airways - www.smallplanet.aero
Thomas Cook - www.thomascook.com
Trade Air - www.trade-air.com
Transaero Airlines - www.transaero.com
Transavia - www.transavia.com
Transavia France - www.transavia.com
Travel Service - www.travelservice.aero
Ukraine Intern.Airlines - www.ukraine-international.com
UTair - Ukraine Airlines - www.utair.ua
Volotea - www.volotea.com
Vueling Airlines - www.vueling.com
Windrose - www.windrose.aero
Wizz Air - wizzair.com
XL Airways France - www.xlairways.fr
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Or you could try one of the flight search websites:
Skyscanner - www.skyscanner.net
Charter Flight - http://www.charterflights.co.uk/flights/croatia/split/
Ebookers - http://www.ebookers.ie
- http://www.ebookers.com
Flight Comparison - http://www.flightcomparison.co.uk/flightcomparison/flights/flysplitspu.htm
Airline Network - http://www.airline-network.co.uk/
If you know of anymore please let me know and I'll update. Thanks.