Cheapest return flights from Washington to San Jose in December from $408

Best time to book flights for Washington (IAD) to San Jose (SJO) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to San Jose (SJO) in December 2025 (see full year).

Return flights

25 Dec - 30 Dec Avianca direct
20 Dec - 27 Dec Avianca direct
20 Dec - 28 Dec Avianca
16 Dec - 30 Dec Avianca
17 Dec - 31 Dec Avianca
16 Dec - 30 Dec Avianca direct
25 Dec - 03 Jan Avianca direct
19 Dec - 27 Dec Avianca
23 Dec - 03 Jan Avianca direct
22 Dec - 02 Jan Copa
20 Dec - 28 Dec United direct

Also check the deals for one-way flights from Washington to San Jose in December.

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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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