AirHint found the following cheapest return flights from Seoul (ICN) to Nha Trang (CXR) in May 2026 (see full year).

Return flights

30 May - 06 Jun	Vietnam Airlines
23 May - 26 May	China Southern
23 May - 27 May	China Southern
14 May - 18 May	China Southern
18 May - 22 May	China Southern
07 May - 11 May	China Southern
14 May - 17 May	China Southern
12 May - 17 May	China Southern
22 May - 27 May	China Southern
23 May - 28 May	China Southern
24 May - 29 May	China Southern
30 May - 02 Jun	Korean Air	direct
30 May - 06 Jun	Korean Air	direct

Also check the deals for one-way flights from Seoul to Nha Trang in May.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seoul to Nha Trang in May from $180

Return flights