This study was conducted with the aim of monitoring mosquitoes and houseflies in Cairo International Airport and evaluating the effect of three weather factors on the population activity of these pests. Mosquito populations were detected and monitored through placing sticky traps in four infested areas. The housefly adults were detected and monitored through placing bait traps in five areas. Monitoring for the two pests extended from January 2019 to December 2020. Obtained results indicated that mosquito adults were more abundant in Skylight Bathrooms and Air Conditioning Stations followed by the Area between Halls 1&2 and finally the Power Station. The housefly adults were most abundant in the Airside Hall no. 3, Terminal Building no. 1 and Gate 27, Terminal Building no. 1 followed by Area between Budling no. 2 and Budling no 3, Area between Halls 1 & 2, Terminal Building no.1 and the seasonal Hall related to Terminal Building no. 3 were the least areas to harbor housefly adults. This trend was obtained during the two years of study.
Both maximum and minimum temperatures had negative effects on the population density of mosquito adults but the effect of minimum temperature was insignificant, while relative humidity had insignificant positive effect. For the housefly adults, both maximum and minimum temperatures had insignificant negative effect on the population density but the effect of relative humidity was positive and significant.