Antonyms for the phrase "are late for" would be words or phrases indicating arriving early or on time. Some examples include "arriving on schedule," "not tardy," "punctual," or "timely." Being punctual is valued in many situations as it shows respect for others' time and displays reliability. In contrast, being regularly late or tardy can cause frustration and inconvenience to those who are waiting. It's important to have good time management skills, plan ahead, and strive to arrive on time or even a bit early. Ultimately, being punctual can lead to smoother and more productive interactions and happier relationships with others.