How does KAYAK find such low prices on flights from Illinois to San Juan?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Juan. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Juan?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to San Juan?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Juan?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$55 CHEAP FLIGHTS from Illinois to San Juan (SJU)

SJU

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Cheap Flight Deals from Illinois to San Juan

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to San Juan

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Illinois to San Juan.

Discover the best prices and deals for you by selecting your travel dates.

Choose your dates

8:44 pm - 2:54 amORD-SJU

28h 10m1 stop

9:30 pm - 9:27 amSJU-ORD

13h 57m1 stop

$118Frontier

Find Deal

Sat, Feb 15 - Tue, Feb 18

4:00 pm - 12:27 amSTL-SJU

6h 27m1 stop

2:54 am - 9:36 amSJU-STL

7h 42m1 stop

$119

Find Deal

Tue, Mar 4 - Sun, Mar 9

5:00 am - 12:27 amORD-SJU

17h 27m1 stop

7:00 am - 10:36 amSJU-ORD

5h 36mnonstop

$122Spirit Airlines

Find Deal

Tue, Mar 4 - Sat, Mar 8

4:00 pm - 12:27 amSTL-SJU

6h 27m1 stop

9:35 pm - 11:49 pmSJU-STL

27h 14m1 stop

$124

Find Deal

Tue, Mar 4 - Tue, Mar 11

4:58 pm - 2:54 amORD-SJU

7h 56m1 stop

8:55 am - 4:31 pmSJU-ORD

9h 36m1 stop

$125Frontier

Find Deal

Mon, Feb 24 - Tue, Feb 25

2:29 pm - 12:27 amORD-SJU

7h 58m1 stop

6:45 pm - 11:56 pmSJU-ORD

7h 11m1 stop

$129Spirit Airlines

Find Deal

Tue, Mar 4 - Wed, Mar 5

11:05 am - 11:46 pmORD-SJU

10h 41m1 stop

3:23 pm - 8:53 pmSJU-ORD

7h 30m1 stop

$235Delta

Find Deal

Tue, Feb 11 - Fri, Feb 14

6:00 am - 2:36 pmMDW-SJU

6h 36m1 stop

4:15 pm - 10:20 pmSJU-MDW

8h 05m1 stop

$235Delta

Find Deal

Sun, Feb 9 - Fri, Feb 14

11:55 am - 10:35 pmSTL-SJU

8h 40m1 stop

6:00 am - 2:52 pmSJU-STL

10h 52m2 stops

$290American Airlines

Find Deal

Tue, Feb 25 - Tue, Mar 4

11:16 am - 10:45 amSPI-SJU

22h 29m2 stops

6:04 pm - 10:41 amSJU-SPI

17h 37m2 stops

$322American Airlines

Find Deal

Tue, Apr 1 - Tue, Apr 8

Low season	September
High season	March
Cheapest flight	$55

Best time to beat the crowds with an average 18% drop in price.

Most popular time to fly with an average 15% increase in price.

Flight from Chicago O'Hare Airport to San Juan

How does KAYAK find such low prices on flights from Illinois to San Juan?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Juan.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Juan?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to San Juan?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Juan?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.