Revenue Management (RM) has evolved from traditional yield management into algorithm-driven dynamic pricing systems across airlines, hospitality, ride-sharing, and digital marketplaces. While RM enhances allocative efficiency and profitability, it simultaneously raises significant legal concerns relating to price discrimination, competition law, consumer protection, and data privacy. This paper develops a Legal-Integrated RM Framework that treats legal compliance as an endogenous design parameter rather than an ex-post constraint. A structured multiple-case design covering Uber, Amazon Marketplace, Delta Air Lines, and Booking.com is employed, with each case coded against a uniform template that maps RM primitives to the legal doctrine at issue and the formal outcome documented in primary sources. The findings demonstrate a growing regulatory emphasis on transparency, fairness, and anti-collusion safeguards. The framework is operationalised through three interdependent layers, namely structural alignment, operational safeguards, and governance oversight, and its application is illustrated through Uber's surge-pricing system.