When traveling from Louis Armstrong New Orleans International Airport (MSY) to Tan Son Nhat International Airport (SGN) in January, you’ll likely combine a U.S. carrier (Delta, American, or United) with an Asian partner (Korean Air, Japan Airlines, Cathay Pacific, or Vietnam Airlines). Primary keywords: "best airline MSY SGN," "MSY to SGN carriers." Delta + Korean Air or Delta + Japan Airlines often offer smooth connections via Atlanta or Tokyo with strong onboard service and alliance benefits. American Airlines partners with Japan Airlines and other Oneworld carriers for routes through Dallas or Los Angeles. United’s Star Alliance options route via Houston, San Francisco, or Newark with partners like ANA. For comfort, choose carriers offering lie-flat seats in business on long-haul legs; for value, look for promotions and mixed-cabin pricing. Check baggage rules, change/cancellation policies, and loyalty benefits before booking. CTA: Compare multi-airline itineraries for January to find the best balance of price and comfort.