Turkish Airlines Miles&Smiles is offering a 40 percent bonus on transfers from Citi ThankYou points through August 31, 2026, which can cut the ThankYou cost of a U.S. to Istanbul business award if award space cooperates.
If you hold Strata Premier, Strata Elite, or another eligible ThankYou card and already need Turkish metal or a Star Alliance award, the traveler job is to decide whether to transfer before the campaign ends knowing the bonus miles post only after the window closes.
- Window: Transfers completed through August 31, 2026, per specialist terms summaries tied to Turkish’s campaign page.
- Bonus: 40 percent extra Miles&Smiles miles on eligible Citi ThankYou transfers.
- Cap: Up to 50,000 bonus miles per the same campaign terms reporting.
- Timing catch: Bonus miles credit after the campaign ends, not instantly with the base transfer.
- Ratio: Premium Citi cards are reported at 1,400 miles per 1,000 ThankYou points during the promo.
What the current Citi to Turkish offer is
One Mile at a Time’s August 3 report and AwardWallet’s same-day terms summary both describe a Turkish-side 40 percent transfer bonus for Citi ThankYou points moved into Miles&Smiles between August 1 and August 31, 2026. Both outlets point readers to Turkish’s official campaign page at turkishairlines.com Miles&Smiles Citi campaign for full legal terms.
The specialists agree on the structure that matters most for booking math. Ordinary Citi to Turkish transfers run 1:1 in 1,000-point increments. With the 40 percent bonus on premium ThankYou products, 1,000 ThankYou points become 1,400 Miles&Smiles miles after the bonus posts. AwardWallet also lists a lower 980-mile outcome per 1,000 points for some non-premium ThankYou cards, so card product still matters.
Both reports state a hard ceiling of 50,000 bonus miles and warn that bonus miles are credited after the campaign ends rather than the moment the base transfer posts. That delay is the operational difference between this promo and a bank-side transfer bonus that multiplies inside the transfer cart.
Deep Arrival’s Turkish Airlines guide still frames Miles&Smiles as a 1:1 partner of Citi, Capital One, and Bilt for U.S. collectors who want Istanbul-centered awards. This August window is a temporary markup on that corridor, not a permanent chart change.
Where the math can still work
OMAAT’s example keeps the focus on Turkish metal to or from Istanbul. A one-way saver business award near 65,000 Miles&Smiles miles becomes about 47,000 ThankYou points after a 40 percent bonus if the full premium ratio applies and you transfer only what the award needs. That is still a real charge on many U.S. gateways when cash business fares sit far higher.
AwardWallet adds other illustrations, including selected Star Alliance business awards into parts of Europe and cheaper United economy awards such as Alaska. Those examples only help if Turkish’s website actually shows the award, the carrier accepts the partner space, and you can finish ticketing after the bonus posts.
Do not transfer on hope. Search the award, screenshot the price and taxes, then transfer only the base miles you need for that ticket. If the bonus posts later, hold a small ThankYou buffer only when you have a second confirmed award waiting. Otherwise you risk stranded Miles&Smiles balances under Turkish’s expiration rules.
Taxes and carrier surcharges still apply. Specialist comment threads flag that some U.S. to Istanbul business awards can carry several hundred dollars in fees each way. Model the cash outlay beside the points math before you move points that could have gone to American Airlines or another Citi partner.
Rules that change the decision
Registration and membership setup are not free. AwardWallet’s terms list says you must be a Miles&Smiles member and register your membership number in advance to participate. Complete that linkage before the transfer if your accounts are not already connected.
The campaign end clock is reported as 11:59 p.m. UTC+3 on August 31, 2026, which AwardWallet converts to 4:59 p.m. Eastern. Do not wait for the last Eastern evening hour if you are on U.S. clocks. Base transfers can take up to several business days even when they usually finish faster.
Because bonus miles arrive after the campaign, you cannot redeem base plus bonus the same afternoon you transfer. If your award requires 65,000 miles and you transfer only 47,000 ThankYou points expecting the bonus to fill the gap, you will be short until the bonus posts. Either transfer the full award cost first and treat the bonus as surplus, or wait to ticket until the bonus is visible.
Deep Arrival’s carry-on size chart is still the right companion page when you finally book the metal, because points math does not change the bag that has to fit the gate sizer.
Who should transfer, and who should not
Transfer if you already see bookable Turkish or partner awards you will use, you hold a premium ThankYou product with the better ratio, and you can wait for the delayed bonus without missing a ticketing deadline.
Hold if you only “might” fly Istanbul next year, if award space is not open, or if your ThankYou balance is more valuable for a near-term American Airlines transfer without a bonus. Citi’s American Airlines partnership remains a competing use of the same points.
Cap awareness matters. The 50,000 bonus-mile ceiling means the promo’s richest upside is front-loaded. Transferring far above that ceiling still earns base miles 1:1 but not unlimited bonus.
Read Turkish’s live campaign page before every transfer batch. Specialist write-ups can lag if Turkish edits terms mid-month. If the official page and the specialist summary disagree, stop and re-check both before moving points.
Keep a written checklist of transfer date, ThankYou balance moved, expected base miles, expected bonus miles, and award search screenshot filename. That paper trail is the only clean way to dispute a missing bonus after August 31 without re-running the entire award search from memory.
| If you… | What to do |
|---|---|
| See open Turkish business space near 65,000 miles to or from Istanbul | Transfer only after screenshotting the award; model fees; account for delayed bonus posting. |
| Hold a non-premium ThankYou card with the lower reported ratio | Recalculate value before moving points; the 40 percent headline may not match your product. |
| Need to ticket immediately | Transfer the full award cost first; do not rely on post-campaign bonus miles for the same ticket. |
| Have no award search results | Do not transfer for inventory that is not bookable today. |
| Prefer American Airlines redemptions soon | Compare Citi to AA against this temporary Turkish bonus before you move the balance. |
- Before August 31: Link Miles&Smiles, register if required, and finish transfers early enough for multi-day processing.
- Award first: Search and screenshot space before any transfer batch.
- Bonus lag: Plan tickets that do not require same-day access to bonus miles.
- Cap: Track bonus miles toward the 50,000 ceiling if you plan multiple transfers.
- Fees: Add cash taxes and surcharges to the points math before you commit.
Transfer only when an award is real, your card ratio is confirmed, and you can wait for the delayed bonus without breaking the ticket timeline.
When does the 40 percent Citi to Turkish bonus end?
Specialist terms summaries tied to Turkish’s campaign page say transfers must be completed by August 31, 2026, with the end clock reported in Turkey time.
When do bonus miles post?
OMAAT and AwardWallet both report that bonus miles post after the campaign ends, not instantly with the base transfer.
Is there a bonus cap?
Yes. Both independent reports state a maximum of 50,000 bonus miles under this offer.
Do all Citi cards get the same ratio?
AwardWallet lists a higher 1,400 miles per 1,000 points outcome for premium products and a lower 980-mile outcome for some other ThankYou cards, so confirm your product before transferring.
Where are the official terms?
Turkish Airlines hosts the campaign terms on its Miles&Smiles Citi promotion page; use that page as the final authority before you transfer.
