Southwest Airlines Flights from Chicago to San Juan

Southwest Airlines on this route

Chicago is a Southwest Airlines hub, so Southwest Airlines typically offers several daily departures on CHI–SJU, with nonstop service where demand supports it and connections through its other hubs otherwise. The nonstop flight time is about 4h 34m.

Fare classes available: Basic, Choice / Choice Preferred, Choice Extra. Southwest does not charge change fees on any fare; you pay the fare difference if the new flight is more expensive.

The lowest one-way fare we have on record for this route is $193. Fares like that usually show up on off-peak days and for travel booked a few weeks out; an agent can check whether a similar fare is available for your dates.

Because Delta Air Lines treats San Juan as a hub, this pairing tends to have frequent departures throughout the day. American Airlines and Southwest Airlines also compete here, which keeps fares in check.

At 2,074 miles and about 4h 34m nonstop, this is a long domestic sector where the choice of airline matters for comfort: seat pitch, Wi-Fi, and a meal option vary more than the fare does. Overnight and first-departure flights are usually cheapest.

When to fly

From the Midwest, the expensive weeks cluster around Thanksgiving, Christmas, and spring break in March; May, early June, September, and October tend to price lowest.

On this specific route our fare history shows October as the cheapest month and December as the most expensive, a spread of $110 between the two.

Tuesday, Wednesday, and Saturday departures are usually the cheapest days on domestic routes; Friday and Sunday are the most expensive. Early-morning and late-evening flights are often priced below the midday departures.

For domestic travel, booking three to eight weeks ahead usually captures the best price. Inside two weeks, fares climb; more than four months out, airlines have not yet released their cheapest inventory.