AirHint found the following cheapest return flights from Haikou (HAK) to Seoul (ICN) in April 2026 (see full year).
Return flights
| 19 Apr - 23 Apr | China Southern | ||
| 20 Apr - 24 Apr | China Southern | ||
| 03 Apr - 10 Apr | Hainan Airlines | direct |
Also check the deals for one-way flights from Haikou to Seoul in April.
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