AirHint found the following cheapest return flights from Chicago (ORD) to San Juan (SJU) in March 2026 (see full year).

Return flights

11 Mar - 20 Mar	United
07 Mar - 07 Apr	United	direct
26 Mar - 02 Apr	Delta
01 Mar - 08 Mar	United
05 Mar - 08 Mar	United
26 Mar - 02 Apr	United	direct
06 Mar - 14 Mar	United	direct
15 Mar - 21 Mar	United	direct
15 Mar - 22 Mar	United	direct

Also check the deals for one-way flights from Chicago to San Juan in March.

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 Chicago to San Juan in March from 344€

Return flights