Can you exchange Vietnamese dong back to foreign currency at Nha Trang airport? What's the exchange rate?

There is a currency exchange counter right across from the baggage claim area at Cam Ranh airport. The rate is slightly worse than city jewelry exchange shops, but the difference is minor — not worth worrying about for small amounts.

Airport exchange rates are slightly lower than at city jewelry shops, but the gap is small enough that it's not worth chasing a better rate. Exchanging dong back to your home currency at the airport is a perfectly reasonable option.

Exchange rates in Vietnam fluctuate but only slightly. There's no need to shop around obsessively — the difference between airport and city rates is minimal and won't meaningfully affect your travel budget.