AirHint found the following cheapest return flights from Portland (PDX) to Madrid (MAD) in March 2026 (see full year).
Return flights
| 06 Mar - 19 Mar | British Airways | ||
| 02 Mar - 10 Mar | British Airways | ||
| 01 Mar - 10 Mar | Iberia | ||
| 03 Mar - 10 Mar | Iberia | ||
| 13 Mar - 20 Mar | Delta | ||
| 25 Mar - 01 Apr | British Airways |
Also check the deals for one-way flights from Portland to Madrid in March.
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