Formal:
* Patawad po (most common and respectful)
* Paumanhin po (also respectful, but more formal)
Informal:
* Pasensya ka na (more casual)
* Sorry (borrowed from English, commonly used)
Other options:
* Pasensya (brief and informal)
* Tawad (less common, but used in some regions)
You can choose the most appropriate translation depending on the situation and your relationship with the person you are speaking to.