Narrative:

Aircraft X was told to taxi and hold short of the runway (due to lots of taxiway closures). Aircraft Y was a previous arrival that was holding short of the runway at the approach end. I was informed later tonight afterwards that I told aircraft X to cross the runway when I meant to instruct aircraft Y to cross. Both read it back. I caught it and told aircraft X to hold short; and then cross once landing traffic was no longer a factor. Just make sure I issue the correct callsign.

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Original NASA ASRS Text

Title: SDF Tower Controller reported they issued a runway crossing clearance to the wrong aircraft due to confusion caused by similar sounding call signs.

Narrative: Aircraft X was told to taxi and hold short of the runway (due to lots of taxiway closures). Aircraft Y was a previous arrival that was holding short of the runway at the approach end. I was informed later tonight afterwards that I told Aircraft X to cross the runway when I meant to instruct Aircraft Y to cross. Both read it back. I caught it and told Aircraft X to hold short; and then cross once landing traffic was no longer a factor. Just make sure I issue the correct callsign.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.