British Airways and Virgin Atlantic typically offer direct service from Orlando International Airport (MCO) to London Heathrow Airport (LHR) with full-service transatlantic amenities such as included meals, entertainment systems, and a range of cabin classes (economy, premium economy, business/club). US carriers (American Airlines, Delta) may offer one-stop itineraries via their US hubs with competitive pricing and frequent-flyer partner benefits. Baggage allowances and change/cancellation policies vary by fare class — premium cabins often include larger checked allowance and lounge access (e.g., British Airways Galleries, Virgin Atlantic Clubhouses). For December travel, compare exact schedules, seat pitch, onboard meals, and fees; if convenience and fewer touchpoints are key, opt for nonstop flights with BA or Virgin. CTA: Review carrier offers and reserve your preferred class for December MCO to LHR flights to secure holiday travel perks.