Kiev expects to get its first F-16 fighter jets from its Western allies in June-July, a senior Ukrainian military source quoted by "Reuters" said on Friday.
Ukraine has long sought US-made F-16 fighter jets to help counter Russian air superiority. The source did not say which country would deliver the planes.
So far, Denmark, the Netherlands, Norway and Belgium have committed to sending F-16s to Ukraine.
Ilya Yevlash, an air force spokesman, said this week that some Ukrainian pilots are completing their training to fly military aircraft.
Pilots and ground staff have been trained for months by Ukraine's Western partners.
Ukraine's military has had to rely on a relatively small fleet of Soviet-era aircraft as it struggles to hold off a full-scale invasion by Russia in February 2022.
As Russian forces slowly advance in the eastern Donbas region and mount a new offensive to the northeast near the city of Kharkiv, Ukrainian officials see the addition of the F-16 as a vital upgrade for their air force.