AirHint found the following cheapest return flights from Oakland (OAK) to Frankfurt (FRA) in May 2026 (see full year).
Return flights
| 05 May - 17 May | Alaska Airlines | ||
| 25 May - 31 May | Alaska Airlines | ||
| 27 May - 10 Jun | Alaska Airlines | ||
| 24 May - 07 Jun | Alaska Airlines | ||
| 22 May - 31 May | Alaska Airlines | ||
| 29 May - 04 Jun | Icelandair |
Also check the deals for one-way flights from Oakland to Frankfurt in May.
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