Cheapest return flights from Washington to San Juan in October from $140

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

Return flights

26 Oct - 30 Oct Frontier Airlines direct
09 Oct - 16 Oct Frontier Airlines direct
23 Oct - 30 Oct Frontier Airlines direct
16 Oct - 19 Oct Frontier Airlines direct
09 Oct - 19 Oct Frontier Airlines direct
16 Oct - 23 Oct Frontier Airlines direct
23 Oct - 02 Nov Frontier Airlines direct
19 Oct - 26 Oct Frontier Airlines direct
23 Oct - 26 Oct Frontier Airlines direct
20 Oct - 27 Oct American Airlines
20 Oct - 23 Oct United direct
29 Oct - 02 Nov United direct
25 Oct - 02 Nov United
30 Oct - 04 Nov American Airlines
30 Oct - 01 Nov Frontier Airlines
30 Oct - 04 Nov United direct
02 Oct - 20 Nov United

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

Skyscanner

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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