Can I apply a promo code when paying with KrisFlyer miles? August 12, 2022 08:29 Updated Yes, you may apply a promo code when paying with KrisFlyer miles as long as the promo code is valid. Related articles Are KrisFlyer miles deducted from my account immediately? I am unable to redeem KrisFlyer miles for my booking. How do I cancel my booking? I do not have sufficient miles. Is partial payment of KrisFlyer miles allowed? What payment methods can I use?