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Cheapest one-way flights from Washington (IAD) to San Jose (SJO), January

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Dates, airline, and price
Dates	Airline	Price
17 Jan	United Direct Flight
01 Jan	Delta
02 Jan	Delta
01 Jan	United Direct Flight
03 Jan	Copa
03 Jan	United Direct Flight
02 Jan	United Direct Flight

deals for return flights from Washington to San Jose in January.

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Updated Jul 15, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Washington (IAD) to San Jose (SJO), January

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