By plane
Abidjan is well-connected internationally with regular flights on:
Turkish Airlines (http://www.turkishairlines.com) from Istanbul
Air France (http://www.airfrance.com) from Paris
Brussels Airlines (http://www.brusselsairlin...) from Brussels
Emirates (http://www.emirates.com/) from Dubai via Accra, no change of aircraft
Air Nigeria formerly Virgin Nigeria (http://www.myairnigeria.com/) from Lagos
Kenya Airways (http://www.kenya-airways.com/) from Nairobi also continues to Dakar on the same aircraft
Ethiopian Airlines (http://www.ethiopianairli...) from Addis Ababa
Air Ivoire (http://www.airivoire.com/) is a national carrier that offers connections to a number of destinations in Europe as well as Paris and Marseille.
By road
The roads to Abidjan are quite good despite their maintenance not being kept up as much as it should as of late. Traffic lights all but disappear once outside of Abidjan though, so be advised that driving outside of the city can be "active". It's important to note that whether in a private car, taxi, or gbaka the shared minibuses you will be stopped at various official and unofficial checkpoints where they will delay you at the very least and try to shake down a bribe at the very worst. Abidjan also serves as a terminus for long haul bus lines from Bamako, Mali, Ouagadougou, Burinka Faso, and Accra, Ghana.
By train
The only train connection with Abidjan is the one that ends in Burkina Faso. While a possibly interesting ride, the schedule is quite unreliable and hard to predict.