On 20 January 1918, the squadron was transferred to Aviation Concentration Center, Mitchell Field, Long Island for duty overseas.

After just over a week, the squadron embarked on the RMS Adriatic, arriving in Liverpool, England on 16 February after being delayed in Halifax, Nova Scotia for a convoy.

At Liverpool, the squadron boarded a train and arrived at Winchester, England that evening, where it was assigned to the Romney Rest Camp.

By July, the men of the 185th were becoming impatient, as it was rumored the squadron would remain in England on a permanent basis, however orders were finally relieved to report to the Flower Down Rest Camp near Winchester on 7 August.

Late the next afternoon, the squadron crossed the English Channel and arrived at American Rest Camp #2 in Le Havre, France.

[2] The next day the squadron boarded a troop train, bound for the St. Maixent Replacement Barracks, arriving on 16 August.

On 20 August, the squadron boarded a troop train and proceeded to the 1st Air Depot, Colombey-les-Belles Airdrome, arriving on the 23d.

Also the airdrome had no landing lights, and the searchlights and Anti-Aircraft batteries were not versed with American planes flying after dusk.

In addition, there were not enough searchlights for the guidance of our pilots, who frequently could not find the airfield at night and had to make forced landings after running out of gasoline.

On the night of the 22d, the squadron made a low-level fight over enemy territory and Lieutenant Kelton fired about 100 rounds into a troop train between Spincourt and Longuyon.

[2] The only aerial combat of the squadron happened on the night of 23 October when Lts Kelton and Johnson were on alert when a report came in that enemy Gotha bombers were over Bar-le-Duc.

Kelton reported that he observed searchlights in the Bar-le-Duc area performing sweeps to locate the enemy aircraft.

On 11 December 1918 orders were received from First Army for the squadron to report to the 1st Air Depot, Colombey-les-Belles Airdrome to turn in all of its supplies and equipment and was relieved from duty with the AEF.

Personnel at Colombey were subsequently assigned to the commanding general, services of supply, and ordered to report to one of several staging camps in France.

There, personnel awaited scheduling to report to one of the base ports in France for transport to the United States and subsequent demobilization.

It proceeded to Mitchel Field, Long Island on 15 June where the personnel of the squadron were demobilized and returned to civilian life.