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Caribbean

$94+ Cheap flights from Illinois to Caribbean

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJU
Jul 15 — Jul 221
Wed 7/15
Wed 7/22
1 adult, Economy
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Cheap flight deals from Illinois to Caribbean

Cheapest flights from Illinois to Caribbean
Explore the most affordable flight options available from Illinois to Caribbean. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.

This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:00 am
ORD
-
SJU
1 stop7h 45m
United Airlines
Sun 8/303:56 pm
SJU
-
ORD
Nonstop5h 09m
United Airlines
Deal found 6/12$254
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:29 am
ORD
-
SJU
Nonstop4h 57m
Frontier
Mon 8/246:11 pm
SJU
-
ORD
Nonstop5h 15m
Frontier
Deal found 6/10$255
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:40 am
ORD
-
SJU
1 stop9h 44m
American Airlines
Sat 8/223:44 pm
SJU
-
ORD
1 stop9h 34m
American Airlines
Deal found 6/11$256
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:45 pm
MDW
-
SJU
2 stops8h 15m
Southwest
Mon 8/245:00 am
SJU
-
MDW
2 stops8h 25m
Southwest
Deal found 6/12$256
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:20 pm
ORD
-
SJU
Nonstop4h 55m
American Airlines
Thu 9/31:38 pm
SJU
-
ORD
1 stop11h 57m
American Airlines
Deal found 6/11$257
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:44 am
ORD
-
SJU
Nonstop5h 00m
Frontier
Tue 8/186:11 pm
SJU
-
ORD
Nonstop5h 15m
Frontier
Deal found 6/11$258
This Expedia deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:29 am
ORD
-
SJU
Nonstop4h 57m
Frontier
Sat 8/296:11 pm
SJU
-
ORD
Nonstop5h 15m
Frontier
Deal found 6/13$259
This CheapOair deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:44 am
ORD
-
SJU
Nonstop5h 00m
Multiple Airlines
Tue 8/187:25 am
SJU
-
ORD
1 stop10h 55m
Multiple Airlines
Deal found 6/10$262
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:44 am
ORD
-
SJU
Nonstop5h 00m
Frontier
Fri 8/147:14 pm
SJU
-
ORD
Nonstop5h 13m
Frontier
Deal found 6/10$263
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:55 am
ORD
-
SJU
Nonstop4h 49m
United Airlines
Sun 8/303:56 pm
SJU
-
ORD
Nonstop5h 09m
United Airlines
Deal found 6/11$264
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:05 am
MDW
-
SJU
1 stop10h 10m
Southwest
Wed 8/195:15 am
SJU
-
MDW
2 stops7h 50m
Southwest
Deal found 6/14$266
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:29 am
ORD
-
SJU
Nonstop4h 57m
Frontier
Mon 8/319:24 am
SJU
-
ORD
1 stop14h 50m
Frontier
Deal found 6/12$267

Find flight deals from Illinois to Caribbean

Keep the following information in mind while searching for Illinois to Caribbean flight deals. Data was last updated June 15, 2026.

Round-trip from

$254
(United Airlines)

One-way from

$94
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$457

Good round-trip deal

$396 or less

Good one-way deal

$148 or less
From Illinois to Caribbean
Search Deals
One-way flight from Illinois to Caribbean
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Caribbean.
Search Deals
Price to beat on a one-way flight from Illinois to Caribbean.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Caribbean that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 15, 2026.
Use the filters below to find and compare flights from Illinois to Caribbean that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Sat 8/15

7:05 am-6:15 pm

1 stop10h 10m

San Juan Luis Munoz Marin Intl

Wed 8/19

5:15 am-12:05 pm

2 stops7h 50m

$266

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Mon 8/24

6:05 am-4:38 pm

1 stop9h 33m

San Juan Luis Munoz Marin Intl

Tue 9/1

12:56 pm-10:36 pm

1 stop10h 40m

$306

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 9/5

11:15 am-9:55 pm

1 stop9h 40m

San Juan Luis Munoz Marin Intl

Fri 9/11

10:00 am-6:25 pm

2 stops9h 25m

$331

ChicagoNassau

ORD - NAS

ORDNAS

Chicago O'Hare Intl

Sat 9/12

6:00 am-12:01 pm

1 stop5h 01m

Nassau Intl

Wed 9/16

5:57 pm-11:31 pm

1 stop6h 34m

$334

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 9/6

6:00 am-2:44 pm

1 stop7h 44m

San Juan Luis Munoz Marin Intl

Sat 9/12

1:00 am-10:12 am

2 stops10h 12m

$336

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 8/30

3:30 pm-12:30 am

1 stop8h 00m

San Juan Luis Munoz Marin Intl

Thu 9/3

8:55 pm-7:45 am

1 stop11h 50m

$336

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 8/21

9:15 am-8:05 pm

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Tue 8/25

11:50 am-7:55 pm

1 stop9h 05m

$336

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 8/16

3:30 pm-12:30 am

1 stop8h 00m

San Juan Luis Munoz Marin Intl

Sat 8/22

10:25 am-7:45 pm

1 stop10h 20m

$336

ChicagoNassau

ORD - NAS

ORDNAS

Chicago O'Hare Intl

Wed 8/26

7:00 am-5:14 pm

1 stop9h 14m

Nassau Intl

Mon 8/31

3:02 pm-11:44 pm

1 stop9h 42m

$353

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 8/8

2:38 pm-8:34 pm

Nonstop4h 56m

San Juan Luis Munoz Marin Intl

Tue 8/11

7:20 am-2:30 pm

1 stop8h 10m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/13

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Caribbean

Have a flexible travel schedule? Discover the best time to fly to Caribbean from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Caribbean

What is the cheapest month to book a flight from Illinois to Caribbean?

Currently, September is the cheapest month in which you can book a flight from Illinois to Caribbean (average of $369). Flying from Illinois to Caribbean in November is currently the most expensive (average of $584). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to CB?

Find hourly flight availability from Illinois to Caribbean. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 15, 2026.

One of the essential ways to save on airfare from Illinois to Caribbean is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

Weekly flight availability from Illinois to Caribbean

Explore weekly flight availability from Illinois to Caribbean. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 15, 2026.

The most flights from USIL to 0CB are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from Illinois to Caribbean?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Caribbean. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from Illinois to Caribbean?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Caribbean. Price data was last updated on June 13, 2026.

Travelers seeking maximum savings on their Illinois to Caribbean flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Caribbean. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Caribbean?

    There are many flights that can get you from Illinois to Caribbean in 5h 01m. Fly via Southwest, Delta, or JetBlue to get the fastest option. The distance from Illinois to Caribbean is about 1312 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Caribbean one-way?

    The cheapest airlines for a one-way flight from Illinois to Caribbean are JetBlue ($67), Frontier ($84), and Arajet ($100).

  • Can I find deals for flights from Illinois to Caribbean that include hotel bookings?

    Yes. In addition to deals on Illinois to Caribbean flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Caribbean?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Caribbean.

  • Can I find deals for business class flights from Illinois to Caribbean?

    Yes. Cheapflights offers flight deals from Illinois to Caribbean by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Caribbean?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Caribbean (average of $369). Flying from Illinois to Caribbean in November is currently the most expensive (average of $584). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Caribbean

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Illinois to Caribbean

Discover the top 9 airlines that operate flights from Illinois to Caribbean. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$119Average$425FlexibilityNo cancel feeOn-time62%
DeltaCheapest$132Average$532FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$138Average$546FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$175Average$515FlexibilityNo cancel feeOn-time67%
ArajetCheapest$216Average$357FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$225Average$625FlexibilityNo cancel feeOn-time71%
Hahn AirCheapest$228Average$486FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$261Average$581FlexibilityNo cancel feeOn-time69%
AviancaCheapest$324Average$628FlexibilityNo cancel feeOn-time71%

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