AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in August 2026 (see full year).
Return flights
| 18 Aug - 24 Aug | KLM | ||
| 11 Aug - 18 Aug | United | ||
| 11 Aug - 18 Aug | Icelandair | direct | |
| 10 Aug - 17 Aug | WestJet | ||
| 09 Aug - 22 Aug | WestJet | ||
| 09 Aug - 15 Aug | WestJet | ||
| 09 Aug - 15 Aug | Icelandair | direct |
Also check the deals for one-way flights from Portland to Keflavik in August.
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