Direct flights from Europe to Ouagadougou airport leave from Paris and Brussels. If you're flying in from the USA you'll have to transfer at Paris, Dakar or Abidjan. Because Burkina Faso is landlocked, getting in and out of the country by land is usually fairly cheap and the options are plentiful.
Prices are on par with bus fares.
Driving your own car in and out of the country is fairly easy, and generally speaking the roads are in fairly good condition. Buses and cars leave from most major towns, as do minibuses and bush taxis. We encourage you to verify any critical information with the relevant authorities before you travel. This includes information on visa requirements, health and safety, customs, and transportation.