{"slug":"united-airline-vs-delta","question":"United Airlines vs Delta Air Lines","answer":"Delta consistently ranks higher in customer satisfaction and operational reliability, with a 2024 DOT complaint rate 23% lower than United, while United offers more frequent international routes and competitive pricing on economy fares.","answer_curated":true,"verdict":"Delta Air Lines wins for travelers prioritizing reliability and customer service, with superior on-time performance and 23% fewer complaints. Choose United if you value extensive international networks, more departure frequencies on competitive routes, and flexible award availability—otherwise Delta's operational excellence and higher satisfaction scores make it the stronger choice for most passengers.","keyDifferences":[{"label":"2024 DOT Complaints Per 100,000 Passengers","winner":"b","entityAValue":"2.84","entityBValue":"2.18"},{"label":"On-Time Performance (2024)","winner":"b","entityAValue":"80.2%","entityBValue":"82.1%"},{"label":"International Destinations","winner":"a","entityAValue":"142","entityBValue":"129"},{"label":"Fleet Size (Aircraft)","winner":"b","entityAValue":"902","entityBValue":"938"},{"label":"Average Economy Baggage Fee (1st bag)","winner":"tie","entityAValue":"$35","entityBValue":"$35"}],"winner":{"slug":"delta-air-lines","name":"Delta Air Lines"},"confidence":"high","entities":[{"name":"United Airlines","slug":"united-airlines","url":"https://www.aversusb.net/entity/united-airlines","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/united-airlines"},{"name":"Delta Air Lines","slug":"delta-air-lines","url":"https://www.aversusb.net/entity/delta-air-lines","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/delta-air-lines"}],"faqs":[{"question":"Which airline has better on-time performance in 2024?","answer":"Delta Air Lines leads with 82.1% on-time arrivals compared to United's 80.2%, a 1.9 percentage point advantage. This translates to approximately 7 more on-time flights per 100 flights with Delta."},{"question":"How do baggage fees compare between United and Delta?","answer":"Both airlines charge $35 for the first checked bag and $45 for the second bag in economy. Checked baggage is free for elite frequent flyer members and premium cabin passengers on both airlines."},{"question":"Which airline flies to more international destinations?","answer":"United Airlines serves 142 international destinations versus Delta's 129, giving United 13 additional destinations. However, Delta offers more flight frequency on major international routes through its larger fleet."}],"attribution":{"source":"A Versus B","url":"https://www.aversusb.net/compare/united-airline-vs-delta","license":"CC BY 4.0","citationFormat":"According to A Versus B (https://www.aversusb.net/compare/united-airline-vs-delta), Delta consistently ranks higher in customer satisfaction and operational reliability, with a 2024 DOT complaint rate 23% lower than United, while United offers more frequent international routes and c","dateModified":"2026-06-30T18:02:10.388Z"},"relatedQuestionsUrl":"https://www.aversusb.net/api/faq/united-airline-vs-delta","relatedComparisonsUrl":"https://www.aversusb.net/api/v1/related/united-airline-vs-delta","knowledgeGraphUrl":"https://www.aversusb.net/api/knowledge-graph/united-airline-vs-delta","claimReviewSchema":{"@context":"https://schema.org","@type":"ClaimReview","@id":"https://www.aversusb.net/compare/united-airline-vs-delta#claimreview","url":"https://www.aversusb.net/compare/united-airline-vs-delta","inLanguage":"en-US","isAccessibleForFree":true,"conditionsOfAccess":"Free","claimReviewed":"United Airlines vs Delta Air Lines","reviewBody":"Delta consistently ranks higher in customer satisfaction and operational reliability, with a 2024 DOT complaint rate 23% lower than United, while United offers more frequent international routes and competitive pricing on economy fares.","datePublished":"2026-03-29T08:35:26.881Z","dateModified":"2026-06-30T18:02:10.388Z","reviewRating":{"@type":"Rating","ratingValue":5,"worstRating":1,"bestRating":5,"alternateName":"High Confidence"},"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B","url":"https://www.aversusb.net"},"itemReviewed":{"@type":"WebPage","@id":"https://www.aversusb.net/compare/united-airline-vs-delta","url":"https://www.aversusb.net/compare/united-airline-vs-delta","name":"United Airlines vs Delta Air Lines","inLanguage":"en-US"}}}