On 22 June 1941 it attacked airfields at Łuck, Kolki, Wilick, Janówka, Nielisk, Koshirski and other east of Kowel. The following day it attacked airfields at Ovruch, Korosten and Luginy, and again on 24 June. KG 54's losses are unknown but the corps lost seven bombers on the 23 June. From 22 to 25 June, it claimed 774 Soviet aircraft destroyed on the ground in 1,600 sorties after bombing 77 Soviet air bases. KG 54 attacked Soviet tank concentrations at Lubysza and Rawa Ruzka on 23 June, but returned to bombing airfields at Kiev and Borispol while bombing the rail station at Rovno on 25 June. Ovruch, Lugniy and Korosten airfields were revisited on 26 June. On the same day, elements of I./KG 54 attacked the Saroy to Korosten and Krasne to Svarkova rail lines. The air corps bombers lost eight Ju 88 and He 111s with nine damaged, the highest losses over the front line. The air support was effective, and an attack by KG 55, KG 51 and KG 54 injured Ignat Karpezo, the commander of the 15th Soviet Mechanised Corps. The three German bomber units claimed the destruction of 201 Soviet tanks from 22 to 30 June from the Mechanised formation which attempted to block the 1st Panzer Army. They played a vital role in the Battle of Brody. On 1 July KG 54, 55 and 51 routed a Soviet counteroffensive and destroyed 220 motor vehicles and 40 tanks near Lviv.