Cheapest return flights from Washington to San Juan in May from $198

Best time to book flights for Washington (IAD) to San Juan (SJU) flights at AirHint

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

Return flights

29 May - 05 Jun Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
27 May - 31 May Delta
29 May - 12 Jun United
25 May - 08 Jun United direct
24 May - 28 May American Airlines
27 May - 30 May United
30 May - 03 Jun United
16 May - 22 May Frontier Airlines
24 May - 01 Jun Frontier Airlines
27 May - 10 Jun United
22 May - 25 May Frontier Airlines direct
18 May - 22 May Frontier Airlines
24 May - 01 Jun United direct
28 May - 01 Jun United direct
22 May - 08 Jun Frontier Airlines direct
09 May - 22 May Frontier Airlines
23 May - 25 May Frontier Airlines
15 May - 29 May United
24 May - 28 May United direct

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

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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