AirHint found the following cheapest one-way flights from Seattle (SEA) to Keflavik (KEF) in March 2026 (see full year).
One-Way flights
| 14 Mar | Hawaiian Airlines | ||
| 10 Mar | WestJet | ||
| 13 Mar | Alaska Airlines | ||
| 11 Mar | Hawaiian Airlines | ||
| 11 Mar | Icelandair | direct | |
| 14 Mar | Icelandair | direct | |
| 10 Mar | Icelandair | direct | |
| 13 Mar | Icelandair | direct |
Also check the deals for return flights from Seattle to Keflavik in March.
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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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