Citi's 40% Turkish Bonus —
The Catch Nobody Mentions

There's a genuinely big number on this month's transfer board, and for once it's not attached to a program everyone already has points in. Through August 31, Citi is bonusing transfers from ThankYou Rewards to Turkish Airlines Miles&Smiles by 40% — a 1:1.4 rate that beats almost everything else running right now. Turkish is a Star Alliance program with a reputation for outsized value, so a 40% boost gets attention fast.

It's also being covered the way these things always are: the headline rate up top, the old "business class to Europe for 45,000 miles" line right underneath, and a "transfer now" button before you've had a chance to ask the two questions that actually decide whether this is a good deal for you. Which points can even reach Turkish? And is the redemption you're picturing still priced the way the roundups say it is? On both counts, the honest answer is more complicated than the number suggests.

What Citi Actually Launched

The mechanics are simple, and worth getting exactly right before the marketing gloss sets in. Normally, Citi ThankYou points move to Turkish Miles&Smiles at a flat 1:1. During this promotion, that rate is boosted by 40%, so every 1,000 points you send becomes 1,400 Turkish miles. There's nothing to opt into on the Citi side — you transfer as usual.

Two details get buried under the headline. First, the bonus is capped at 50,000 bonus miles, which you'd reach by transferring 125,000 ThankYou points in total; anything above that transfers at the plain 1:1. Second — and this is the one that trips people up — the extra 40% is processed by Turkish after the promotion ends, not credited the instant your points land. When you transfer, you'll see the base miles arrive; the bonus miles show up later. That timing matters more than it sounds, and we'll come back to it.

Whose Points Can Even Use It

Here's the first thing almost every roundup races past, and it's the one that decides whether this deal exists for you at all. Turkish Miles&Smiles is a transfer partner of a specific, limited set of programs — and the two biggest ones in most people's wallets aren't on the list. American Express Membership Rewards and Chase Ultimate Rewards do not transfer to Turkish. Full stop. If your points live in Amex or Chase, this 40% bonus is not something you can use, no matter how good the number looks.

The programs that do reach Turkish are narrower than the coverage implies:

This is the competitor delta worth internalizing. Most articles print "40% to Turkish, book business class to Europe" and quietly assume you're holding the right currency. In reality, the 40% bonus specifically requires Citi ThankYou points — the promo doesn't extend to Capital One, Bilt, or Marriott, even though those programs also feed Turkish. And the two programs the majority of points travelers actually sit on, Amex and Chase, can't touch it. We saw the same pattern earlier this summer with Citi's 20% bonus to Flying Blue, where everyone quoted the wrong number — the rule holds here too: find out whether the deal is even yours before you believe the headline.

The "45K to Europe" Line Is Out of Date

Assume your points are in Citi. The next thing to get straight is what a Turkish redemption actually costs in 2026, because the number the roundups keep reciting is years stale. Turkish Miles&Smiles built its reputation on a famous sweet spot — business class between the US and Europe for 45,000 miles one-way — and that figure has been quietly repeated long after it stopped being true. Turkish has devalued Miles&Smiles more than once, most recently on December 3, 2025, when it raised prices on a range of partner awards with no advance notice. Partner business class to Europe now costs well above the old 45,000-mile rate, and the exact price varies by region.

That doesn't mean Turkish is useless — it means you have to price your specific route on Turkish's published chart before you transfer, rather than trusting a legacy number. The redemption that still holds up well is nonstop business class on Turkish's own metal to Istanbul, which runs around 65,000 miles one-way and puts you on one of the more comfortable business products out there, complete with the airline's famous catering. Value is still there; it's just no longer the giveaway a five-year-old blog post implies.

Is It Worth Transferring For?

Only if you have a real redemption in hand. This is the discipline that separates a good transfer from a regretted one, and Turkish tests it harder than most programs because three risks stack on top of each other. Transfers are one-way and irreversible — once your ThankYou points become Turkish miles, they're Turkish miles forever. Turkish miles expire if the account goes inactive. And Turkish's booking friction means award space you count on can evaporate before you lock it in. A 40% bonus on miles that then sit unbookable in Miles&Smiles isn't a 40% gain; it's a more efficient way to strand currency you can't get back.

So the sequence matters more than the deadline. Price the route, confirm the space, then transfer. Look up your exact itinerary on Turkish's published chart, verify the award seats genuinely exist for your dates and cabin, and only then move the precise number of points that award needs plus a small buffer. The wrinkle unique to this promo — that the bonus miles arrive after August 31 — means you may have to transfer the base amount now and trust the bonus to follow, so lean conservative: don't count on bonus miles you haven't seen for an award you haven't booked. If you don't have a specific Turkish trip in mind, the better move is almost always to leave your points where they are and watch the transfer-bonus calendar; there's a new bonus every month, and stranded Turkish miles help no one.

On Amex or Chase? Do This Instead

If your points are in Membership Rewards or Ultimate Rewards, you can't use this bonus — but you're not shut out of the flights it's advertising. Turkish is a Star Alliance carrier, which means the same Turkish-operated seats can often be booked through Air Canada Aeroplan, and both Amex and Chase transfer to Aeroplan. Even better, Chase is running its own 20% bonus to Aeroplan through September 30, so the timing lines up. Aeroplan prices differently than Turkish and won't always be cheaper, but it's the cleaner path for the Amex/Chase majority: online booking, no Turkish phone queue, and a program you can actually reach.

The most accessible on-ramp to that ecosystem is still a Chase card that earns transferable Ultimate Rewards in the first place. If you're building toward Star Alliance redemptions and don't yet hold one, the Sapphire Preferred is the lowest-risk entry.

Already deeper in the ecosystem? The Sapphire Reserve feeds Aeroplan on the same bonused terms, and if you earn on the business side, the Chase Ink cards reach the same partner list. To stockpile flat-rate points between big redemptions, a Freedom Unlimited pairs cleanly with a Sapphire. On the Amex side, the Amex Platinum and Amex Gold both earn Membership Rewards that transfer to Aeroplan too. Not sure how the pieces fit together? Our complete guide to Chase Ultimate Rewards lays out the foundation, and our five-card framework for serious travelers shows how the whole stack works.

One last reframe, because it's the whole philosophy of this site in a sentence: a bonus changes the price of a redemption, never the wisdom of it. Forty percent off a Turkish flight you'll actually take, booked from the right program with the seat already confirmed, is a real win. Forty percent off a pile of miles in a program you can barely book, chased because the number was big and the clock was ticking, is just a faster way to strand them.