Emirates will deploy a B777-200ER aircraft on its Dubai to Abuja route from October 1.
The Gulf airline currently operates an A340-300 with 267 seats on the service, which launched on August 1 (see news, August 5).
The B777-200ER will increase the number of seats on the route to 274 in a three-cabin configuration with 12 seats in first class, 42 in business and 220 in economy.
Emirates vice-president Adil Al Ghaith said: "The upgrade of our Abuja service to a Boeing 777 demonstrates our commitment to Nigeria market and another step to ensure we offer world class products to our customers in Nigeria."
Outbound flight EK785 departs Dubai daily at 1050 and arrives in Abuja at 1510. Return service EK786 takes-off from the Nigerian capital at 1935 and lands in Dubai at 0550 the next day.
Abuja is Emirates' second destination in Nigeria; it already flies daily to Lagos.