Place the olive oil, garlic, honey, ground cumin, chopped chipotle peppers, orange juice, and a pinch of salt and pepper into a food processor or blender.
Pulse until the mixture is smooth and emulsified to form the marinade.
Put the chicken breasts in a shallow dish or zip-top bag and pour the marinade over them, turning to coat.
Refrigerate and marinate for at least 2 hours or up to overnight for best flavor.
When ready to cook, remove the chicken from the marinade and discard the excess marinade.
Preheat a grill or grill pan to medium-high heat and oil the grates or pan lightly.
Grill the chicken until cooked through, about 6–10 minutes per side depending on thickness, or until an instant-read thermometer registers 165°F (74°C).
Let the chicken rest a few minutes before serving.