AirHint found the following cheapest return flights from Portland (PDX) to Lisbon (LIS) in March 2026 (see full year).
Return flights
| 14 Mar - 19 Mar | Icelandair | ||
| 14 Mar - 22 Mar | Icelandair | ||
| 30 Mar - 06 Apr | KLM | ||
| 24 Mar - 03 Apr | British Airways | ||
| 23 Mar - 29 Mar | Finnair | ||
| 20 Mar - 28 Mar | Alaska Airlines | ||
| 21 Mar - 28 Mar | Hawaiian Airlines |
Also check the deals for one-way flights from Portland to Lisbon in March.
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