Hello, Based on my experience, when evaluating is united or delta better, Delta stands out for its consistent on-time performance and superior customer service. Their flights often depart and arrive as scheduled, and the staff is attentive and professional. Delta's in-flight entertainment and cabin cleanliness further enhance the travel experience. However, United offers a more extensive international network, thanks to its Star Alliance membership, providing access to over 1,300 destinations worldwide. Their MileagePlus program also offers valuable redemption options, especially for international travel. Ultimately, the choice between United and Delta depends on whether you prioritize domestic reliability and service or global connectivity and loyalty benefits.