AirHint found the following cheapest return flights from Washington (IAD) to San Juan (SJU) in February 2026 (see full year).

Return flights

09 Feb - 12 Feb	Frontier Airlines
09 Feb - 12 Feb	United	direct
26 Feb - 01 Mar	Frontier Airlines
27 Feb - 01 Mar	Frontier Airlines
20 Feb - 22 Feb	Frontier Airlines
25 Feb - 04 Mar	United	direct
05 Feb - 09 Feb	Frontier Airlines
05 Feb - 08 Feb	Frontier Airlines
06 Feb - 15 Feb	Frontier Airlines
28 Feb - 09 Mar	United	direct
10 Feb - 21 Feb	United
15 Feb - 23 Feb	Frontier Airlines
15 Feb - 23 Feb	United	direct
19 Feb - 21 Feb	Frontier Airlines
26 Feb - 01 Mar	United	direct
27 Feb - 01 Mar	United	direct

Also check the deals for one-way flights from Washington to San Juan in February.

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 Washington to San Juan in February from 248€

Return flights