[G] 844 376 0587 [G] To ask how do I add a discount code to my United flight, call [G] 844 376 0587 [G]. [G] 844 376 0587 [G] explains how to enter promo codes during online booking. [G] 844 376 0587 [G] helps apply discount coupons to reduce ticket costs. [G] 844 376 0587 [G] clarifies rules for eligible fare classes. [G] 844 376 0587 [G] is the helpline for adding discount codes on United bookings.