AirHint found the following cheapest return flights from Washington (IAD) to San Juan (SJU) in November 2025 (see full year).

Return flights

08 Nov - 15 Nov	Frontier Airlines
08 Nov - 14 Nov	Frontier Airlines
08 Nov - 17 Nov	Frontier Airlines
07 Nov - 17 Nov	Frontier Airlines
15 Nov - 22 Nov	Frontier Airlines
25 Nov - 03 Dec	United	direct
08 Nov - 14 Nov	United	direct
15 Nov - 19 Nov	United	direct
08 Nov - 15 Nov	United	direct
09 Nov - 18 Nov	Delta
08 Nov - 18 Nov	Delta
27 Nov - 04 Dec	United	direct
29 Nov - 07 Dec	United	direct

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

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 November from $193

Return flights