AirHint found the following cheapest one-way flights from Seattle (SEA) to Keflavik (KEF) in July 2026 (see full year).
One-Way flights
| 17 Jul | WestJet | ||
| 21 Jul | WestJet | ||
| 01 Jul | WestJet | ||
| 16 Jul | WestJet | ||
| 22 Jul | WestJet | ||
| 22 Jul | Icelandair | direct | |
| 01 Jul | Icelandair | direct | |
| 17 Jul | Icelandair | direct | |
| 21 Jul | Icelandair | direct | |
| 05 Jul | WestJet |
Also check the deals for return flights from Seattle to Keflavik in July.
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