AirHint found the following cheapest return flights from Houston (HOU) to San Juan (SJU) in December 2025 (see full year).

Return flights

07 Dec - 14 Dec	United	direct
04 Dec - 07 Dec	Southwest Airlines
29 Dec - 08 Jan	United
30 Dec - 08 Jan	United
31 Dec - 08 Jan	United
17 Dec - 24 Dec	United	direct
17 Dec - 17 Dec	United
25 Dec - 28 Dec	United	direct
29 Dec - 29 Dec	United
26 Dec - 29 Dec	Southwest Airlines
31 Dec - 04 Jan	United	direct
26 Dec - 29 Dec	United	direct
20 Dec - 31 Dec	United	direct

Also check the deals for one-way flights from Houston to San Juan 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 San Juan in December from 329€

Return flights