AirHint found the following cheapest return flights from Houston (IAH) to Barcelona (BCN) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec	United
04 Dec - 11 Dec	United
30 Dec - 06 Jan	United
24 Dec - 31 Dec	British Airways
23 Dec - 30 Dec	Air Canada
29 Dec - 05 Jan	Lufthansa
22 Dec - 29 Dec	Air Canada
19 Dec - 10 Jan	Air Canada
25 Dec - 01 Jan	British Airways
21 Dec - 28 Dec	British Airways
28 Dec - 04 Jan	British Airways
27 Dec - 03 Jan	British Airways
20 Dec - 27 Dec	British Airways
21 Dec - 02 Jan	British Airways
19 Dec - 11 Jan	Iberia
26 Dec - 02 Jan	British Airways
19 Dec - 26 Dec	Delta

Also check the deals for one-way flights from Houston to Barcelona 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.

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Cheapest return flights from Houston to Barcelona in December from $567

Return flights