AirHint found the following cheapest one-way flights from Seattle (SEA) to Hanoi (HAN) in April 2026 (see full year).
One-Way flights
| 15 Apr | Asiana Airlines | ||
| 19 Apr | Asiana Airlines |
Also check the deals for return flights from Seattle to Hanoi 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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