AirHint found the following cheapest return flights from Boston (BOS) to Seoul (ICN) in April 2026 (see full year).

Return flights

17 Apr - 26 Apr	Hainan Airlines
27 Apr - 10 May	Frontier Airlines
10 Apr - 06 May	Frontier Airlines
30 Apr - 10 May	Etihad Airways
17 Apr - 30 Apr	Hainan Airlines
17 Apr - 27 Apr	Hainan Airlines
13 Apr - 23 Apr	Etihad Airways
18 Apr - 27 Apr	Spirit Airlines
16 Apr - 24 Apr	Etihad Airways
17 Apr - 21 Apr	jetBlue
13 Apr - 23 Apr	Delta	direct
10 Apr - 06 May	Delta	direct
27 Apr - 10 May	Delta	direct
17 Apr - 21 Apr	Delta	direct

Also check the deals for one-way flights from Boston to Seoul in April.

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 Boston to Seoul in April from 841€

Return flights