AirHint found the following cheapest return flights from Seoul (GMP) to Hanoi (HAN) in July 2026 (see full year).

Return flights

04 Jul - 08 Jul	Air China
07 Jul - 13 Jul	Air China
06 Jul - 11 Jul	Air China
22 Jul - 28 Jul	Air China
27 Jul - 30 Jul	Air China
31 Jul - 09 Aug	Air China
31 Jul - 08 Aug	Air China
29 Jul - 01 Aug	Air China
01 Jul - 03 Jul	Air China
10 Jul - 14 Jul	Air China
08 Jul - 12 Jul	Air China
11 Jul - 14 Jul	Air China
16 Jul - 20 Jul	Air China
28 Jul - 01 Aug	Air China
31 Jul - 04 Aug	Air China
25 Jul - 01 Aug	Air China
27 Jul - 07 Aug	Air China
28 Jul - 02 Aug	Air China
30 Jul - 02 Aug	Air China
30 Jul - 01 Aug	Air China

Also check the deals for one-way flights from Seoul to Hanoi in July.

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 Hanoi in July from $567

Return flights