AirHint found the following cheapest return flights from Portland (PDX) to Madrid (MAD) in December 2025 (see full year).

Return flights

01 Dec - 10 Dec	Air Canada
02 Dec - 11 Dec	Air Canada
07 Dec - 16 Dec	Iberia
03 Dec - 12 Dec	British Airways
06 Dec - 15 Dec	Air Canada
08 Dec - 17 Dec	Air Canada
09 Dec - 18 Dec	Air Canada
05 Dec - 14 Dec	Air Canada
04 Dec - 13 Dec	Air Canada
01 Dec - 21 Dec	British Airways
31 Dec - 09 Jan	Air Canada
30 Dec - 08 Jan	Air Canada
28 Dec - 06 Jan	Air Canada
29 Dec - 07 Jan	United
27 Dec - 05 Jan	Alaska Airlines
23 Dec - 01 Jan	Air Canada
21 Dec - 10 Jan	Iberia
26 Dec - 04 Jan	British Airways
24 Dec - 02 Jan	Finnair
25 Dec - 03 Jan	Air Canada

Also check the deals for one-way flights from Portland to Madrid in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from Portland to Madrid in December from $452

Return flights