The Felix-Houphouet Boigny International Airport ABJ has daily scheduled flights to and from Paris Air France and Corsair, Istanbul Turkish Airlines, Brussels Brussels airlines, and Dubai Emirates. There are also semi-weekly flights to Cairo Egyptian Air, Casablanca Royal Air Maroc and Johannesburg South African Airways. There are also regular flights to other West-African capitals. The airport is a modern facility and increased security has shaken its old reputation as a place for travelers to be ripped off. Unfortunately, it's also one of the most highly taxed in West Africa, with an average of $90 in taxes and fees added to the cost of every international ticket.
The train journey between Abidjan and Ouagadougou usually takes around 30 hours and costs 30'000 CFA for a one-way second class ticket. Trains are packed with people and luggages as well as the incidental goat. Seats are rather uncomfortable. Nevertheless, this is an amazing experience that's well worth the price and back aches. Be aware that pickpockets are very common on this train, especially when you're an obvious tourist. Never leave your luggage unattended and don't go showing your newest smartphone or Breitling.
It is ill advised to try to enter Côte d'Ivoire from Guinea, Liberia, Mali, or Burkina Faso. The Ghanaian border is fairly secure. If you enter at Elubo, you can easily catch a shared taxi to Aboisso and then a bus to Abidjan. There are about ten military check-points between the border and Abidjan so have your documents ready. If you do not have proper documentation of your inoculations at the border you will be forced to pay a small fine and they will give you an injection at an on-site clinic.