New York JFK to Buenos Aires in Business Class

45,000 Turkish Miles&Smiles miles each way is the sharpest math on this route for business class. Against a cash fare that routinely runs ~$3,500 one way, that works out to roughly 7.8 cents per point (CPP), which is exceptional against our 1.1¢ conservative valuation for Turkish Miles on rewardztravel.com's program page. The metal here runs on Star Alliance partners, specifically Copa or Avianca, so you are not flying Turkish hardware to Buenos Aires. You are using the Miles&Smiles award chart to access Star Alliance business class inventory at a rate the other Star Alliance programs rarely match for this region. That spread between 1.1¢ and 7.8¢ is what makes this redemption worth pursuing seriously.

For availability searches, start with Star Alliance partners that have their own tools. Aeroplan (Air Canada's program) is the most transparent for searching Star Alliance space and shows real-time saver inventory. United MileagePlus can surface Copa business class seats as well, since Copa is a Star Alliance member and United can see that inventory. Neither of these programs prices the route as favorably as Miles&Smiles, but they are useful as search tools to confirm a seat actually exists before you commit to a transfer. Flying Blue is less relevant here given Air France's limited footprint on JFK-EZE specifically.

The availability picture on JFK to EZE in business class requires honest framing. Saver business class seats on any single departure typically range from zero to four seats, and on competitive routes departing from a major hub like JFK, the low end of that range is common. Buenos Aires is a popular destination, and carriers protect revenue business class inventory aggressively on transatlantic-length routes in South America. Flexible travel dates are not a preference here; they are a practical requirement. Weekend departures and holiday windows around Argentine summer (December through February) tighten further. Search a 30-plus-day window and plan to confirm space before any currency transfer.

On transfer paths, the key currencies that reach Turkish Miles&Smiles are Chase Ultimate Rewards and Citi ThankYou Points, both of which transfer to Miles&Smiles at a 1:1 ratio. Marriott Bonvoy also transfers to Miles&Smiles, though at a less favorable ratio and with a points-to-miles conversion that dilutes value. Given our conservative valuation of Chase UR at 2.0¢ and Citi ThankYou at a similar level, redirecting those points to Miles&Smiles for a confirmed 7.8¢ redemption represents a significant multiplier, provided space exists. American Express Membership Rewards does not transfer directly to Turkish Miles&Smiles, which limits Amex cardholders to alternate programs like Aeroplan or Flying Blue for Star Alliance access on this route.

Pulling the math together: 45,000 Miles&Smiles miles at our 1.1¢ valuation represents a baseline worth of roughly $495. Applied against a ~$3,500 cash fare, the redemption value jumps to 7.8¢ per point, one of the stronger South America business class outcomes on our sweet spots page. The gap between baseline and realized value is real, but it is only captured when saver space is confirmed on a Copa or Avianca flight. Premium cabin awards at these rates are capacity-controlled, and the seat has to exist before a transfer becomes rational. Find space first, then transfer.