Cheap flights from Chicago to San Juan from $278 MDW, ORD, RFD → SJU

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $148 to $409.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 7-night return fares leaving within 3 days of 25 Nov to compare.

Every date we hold

159 fares on 13 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $211.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 46 days, 24 Sept to 9 Nov, the cheapest one-way we saw each day was $86 to $157.

At $293, the cheapest one-way found recently is above that range.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 30 Dec to compare.

Every date we hold

1 fares on 1 departure dates

Return

Fares 30 to 59 days before departure were typically 19% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 60 to 89 days before departure were typically 67% lower than 30 to 59 days before departure.

From the cheapest one-way each day between 24 Sept and 9 Nov (46 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Chicago to San Juan?

The cheapest return found recently is $278 with Frontier Airlines, 25 Nov to 2 Dec, found yesterday. The cheapest return we hold, of any age, is $211 with Frontier Airlines, 3 Dec to 8 Dec, found 8 days ago. The cheapest return fare on each of 13 departure dates is usually $265 to $457.

How much is a one-way flight from Chicago to San Juan?

The cheapest one-way found recently is $293 with Allegiant Air, 30 Dec, found 7 days ago.

What is the cheapest month to fly from Chicago to San Juan?

December 2026 is the cheapest month for a return, from $211, 3 Dec to 8 Dec, found 8 days ago.

How far ahead should I book a flight from Chicago to San Juan?

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 19% lower than 0 to 6 days before departure. In 46 days of prices between 24 Sept and 9 Nov, one-way fares 60 to 89 days before departure were typically 67% lower than 30 to 59 days before departure.

Is there a direct flight from Chicago to San Juan?

Yes, the cheapest nonstop return found recently is $951 with Frontier Airlines, 18 Mar 2027 to 29 Mar 2027, found 2 days ago.

Every nonstop date from Chicago to San Juan

How long is the flight from Chicago to San Juan?

The cheapest one-way found recently, with Allegiant Air on 30 Dec, takes 27 h 2 min with 2 stops.

Which airlines have the cheapest flights from Chicago to San Juan?

Between 13 Nov and 30 Mar 2027, Frontier Airlines has the cheapest return on 11 of the 13 departure dates we hold, and Southwest Airlines on 2.