In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular routes from Illinois to San Juan Luis Munoz Marin Intl Airport?

The most popular route from Illinois to San Juan Luis Munoz Marin Intl Airport is Chicago O'Hare Intl - San Juan Luis Munoz Marin Intl. You may also consider Chicago Midway - San Juan Luis Munoz Marin Intl or Lambert-St Louis - San Juan Luis Munoz Marin Intl.

What are the cheapest flights from Illinois to San Juan Luis Munoz Marin Intl Airport?

On average you can expect to pay $690 for a flight from Illinois to San Juan Luis Munoz Marin Intl Airport. The cheapest flight overall is $100 while the most popular route, (Chicago O'Hare Intl - San Juan Luis Munoz Marin Intl) is currently priced at $136.

What are the most reliable airlines from Illinois to San Juan Luis Munoz Marin Intl Airport?

Consider Air Canada (80%), United Airlines (80%) or Air New Zealand (80%) when booking your flight. These represent the most reliable airlines when flying from Illinois to San Juan Luis Munoz Marin Intl Airport.

What are the most popular airlines that fly from Illinois to San Juan Luis Munoz Marin Intl Airport?

The most popular airlines flying from Illinois to San Juan Luis Munoz Marin Intl Airport are Spirit Airlines, United Airlines and American Airlines. Something to consider prior to booking your flight.

Can I find deals for flights from Illinois to Luis Munoz Marin Intl that include hotel bookings?

Yes. In addition to deals on Illinois to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to Luis Munoz Marin Intl?

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

Can I find deals for business class flights from Illinois to Luis Munoz Marin Intl?

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

$86+ Flights from Illinois to San Juan Luis Munoz Marin Intl Airport

Q: How much does it cost to fly round-trip from Illinois to San Juan Luis Munoz Marin Intl Airport?

Airfare is below average for this route at the moment. Illinois to San Juan Luis Munoz Marin Intl Airport flights typically cost between $296 and $616 in February. The cheapest round-trip price found within the last 3 days was $194 on Multiple Airlines (Feb 22-Feb 26).

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Illinois to Luis Munoz Marin Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Luis Munoz Marin Intl

Cheapest flights from Illinois to Luis Munoz Marin Intl
Explore the most affordable flight options available from Illinois to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

Wed 12/3111:23 amORD - SJU

1 stop13h 27mFrontier

Fri 1/96:00 amSJU - ORD

1 stop10h 31mFrontier

Deal found 12/24

$227

Sun 12/286:45 amORD - SJU

1 stop7h 41mJetBlue

Fri 1/22:21 pmSJU - ORD

1 stop9h 43mJetBlue

Deal found 12/25

$228

Wed 12/3110:25 pmORD - SJU

Nonstop4h 35mAmerican Airlines

Thu 1/154:28 pmSJU - ORD

Nonstop5h 32mAmerican Airlines

Deal found 12/24

$236

Wed 12/3110:25 pmORD - SJU

Nonstop4h 35mAmerican Airlines

Fri 1/98:20 amSJU - ORD

1 stop7h 02mAmerican Airlines

Deal found 12/24

$261

Wed 12/3111:23 amORD - SJU

1 stop7h 04mFrontier

Wed 1/78:00 amSJU - ORD

1 stop10h 19mFrontier

Deal found 12/24

$263

Wed 12/3111:23 amORD - SJU

1 stop13h 27mFrontier

Sat 1/109:19 pmSJU - ORD

1 stop20h 09mFrontier

Deal found 12/25

$268

Wed 12/318:15 amMDW - SJU

1 stop13h 39mFrontier

Thu 1/810:47 pmSJU - MDW

1 stop17h 19mFrontier

Deal found 12/25

$268

Wed 12/317:41 pmORD - SJU

1 stop26h 15mJetBlue

Thu 1/1511:06 amSJU - ORD

1 stop10h 30mJetBlue

Deal found 12/25

$270

Wed 12/317:20 amORD - SJU

1 stop12h 46mSpirit Airlines

Thu 1/151:22 pmSJU - ORD

Nonstop5h 15mSpirit Airlines

Deal found 12/26

$273

Tue 12/303:10 pmMDW - SJU

1 stop9h 40mFrontier

Thu 1/810:47 pmSJU - MDW

1 stop17h 19mFrontier

Deal found 12/24

$293

Wed 12/313:10 pmMDW - SJU

1 stop9h 40mFrontier

Thu 1/110:33 amSJU - MDW

1 stop13h 25mFrontier

Deal found 12/24

$319

Wed 12/313:10 pmMDW - SJU

1 stop9h 40mFrontier

Wed 1/74:39 pmSJU - MDW

1 stop7h 38mFrontier

Deal found 12/24

$372

Best flights from Illinois to Luis Munoz Marin Intl
Discover carefully curated flight deals from Illinois to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 26, 2025.

Tue 3/1712:20 pmORD - SJU

1 stop7h 06mJetBlue

Sun 3/221:30 amSJU - ORD

1 stop9h 35mJetBlue

Deal found 12/25

$196

Tue 1/272:20 pmORD - SJU

Nonstop4h 40mUnited Airlines

Fri 1/304:52 pmSJU - ORD

Nonstop5h 28mUnited Airlines

Deal found 12/23

$216

Mon 1/196:00 amSTL - SJU

1 stop9h 17mDelta

Fri 1/236:27 pmSJU - STL

1 stop7h 10mDelta

Deal found 12/26

$225

Mon 1/263:11 pmBMI - SJU

2 stops19h 16mAmerican Airlines

Sat 1/316:05 amSJU - BMI

1 stop16h 36mAmerican Airlines

Deal found 12/23

$235

Thu 2/55:42 pmSTL - SJU

1 stop14h 42mFrontier

Mon 2/93:53 amSJU - STL

1 stop20h 34mFrontier

Deal found 12/26

$248

Thu 1/223:15 pmMDW - SJU

1 stop7h 20mSouthwest

Wed 1/285:40 amSJU - MDW

2 stops10h 35mSouthwest

Deal found 12/25

$275

Tue 1/610:55 amORD - SJU

1 stop11h 19mJetBlue

Tue 1/1311:06 amSJU - ORD

1 stop10h 30mJetBlue

Deal found 12/25

$202

Tue 1/276:00 amSTL - SJU

1 stop9h 17mDelta

Thu 1/294:30 pmSJU - STL

1 stop8h 55mDelta

Deal found 12/25

$225

Tue 3/176:44 amORD - SJU

1 stop9h 39mJetBlue

Thu 3/191:30 amSJU - ORD

1 stop9h 35mJetBlue

Deal found 12/25

$211

Thu 1/227:10 amEVV - SJU

1 stop12h 29mAmerican Airlines

Fri 1/306:00 amSJU - EVV

1 stop12h 18mAmerican Airlines

Deal found 12/25

$235

Sun 5/311:43 amSTL - SJU

1 stop10h 11mDelta

Wed 5/66:15 amSJU - STL

1 stop6h 51mDelta

Deal found 12/25

$225

Sat 1/179:57 amSTL - SJU

2 stops10h 25mUnited Airlines

Fri 1/232:05 amSJU - STL

1 stop10h 36mUnited Airlines

Deal found 12/26

$248

Sat 2/2812:59 pmORD - SJU

1 stop7h 32mJetBlue

Fri 3/131:30 amSJU - ORD

1 stop9h 35mJetBlue

Deal found 12/24

$211

Fri 1/237:10 amEVV - SJU

1 stop12h 29mAmerican Airlines

Fri 1/308:20 amSJU - EVV

2 stops14h 38mAmerican Airlines

Deal found 12/25

$235

Wed 1/211:00 pmSTL - SJU

1 stop8h 45mDelta

Wed 1/286:27 pmSJU - STL

1 stop7h 10mDelta

Deal found 12/25

$225

Fri 2/67:45 amORD - SJU

1 stop8h 20mJetBlue

Sat 2/145:22 pmSJU - ORD

1 stop7h 59mJetBlue

Deal found 12/24

$211

Sat 4/45:30 pmSTL - SJU

1 stop23h 31mFrontier

Fri 4/103:55 amSJU - STL

1 stop19h 38mFrontier

Deal found 12/26

$292

Sun 1/253:15 pmMDW - SJU

1 stop7h 25mSouthwest

Thu 1/296:10 amSJU - MDW

2 stops9h 45mSouthwest

Deal found 12/24

$295

Fri 1/307:45 amORD - SJU

1 stop8h 20mJetBlue

Sun 2/89:25 amSJU - ORD

1 stop12h 06mJetBlue

Deal found 12/25

$216

Mon 3/210:46 amMLI - SJU

1 stop8h 14mUnited Airlines

Fri 3/64:52 pmSJU - MLI

1 stop7h 30mUnited Airlines

Deal found 12/26

$298

Tue 3/176:00 amSTL - SJU

2 stops8h 57mAmerican Airlines

Tue 3/241:30 amSJU - STL

1 stop16h 43mAmerican Airlines

Deal found 12/26

$273

Tue 1/137:45 amORD - SJU

1 stop8h 20mJetBlue

Fri 1/2311:06 amSJU - ORD

1 stop10h 30mJetBlue

Deal found 12/24

$216

Wed 1/281:15 pmMDW - SJU

1 stop7h 55mSouthwest

Mon 2/92:20 pmSJU - MDW

1 stop11h 25mSouthwest

Deal found 12/25

$330

Sat 5/27:03 pmSTL - SJU

1 stop14h 32mAmerican Airlines

Tue 5/123:45 pmSJU - STL

1 stop17h 20mAmerican Airlines

Deal found 12/26

$273

Sat 5/27:45 amSTL - SJU

2 stops11h 53mUnited Airlines

Tue 5/122:55 pmSJU - STL

1 stop8h 31mUnited Airlines

Deal found 12/26

$309

Fri 2/2712:41 pmORD - SJU

1 stop9h 48mJetBlue

Sun 3/15:10 amSJU - ORD

1 stop8h 54mJetBlue

Deal found 12/24

$231

Tue 1/2712:48 pmMDW - SJU

1 stop6h 10mDelta

Wed 2/253:55 pmSJU - MDW

1 stop8h 36mDelta

Deal found 12/26

$310

Mon 1/269:57 amSTL - SJU

2 stops10h 25mUnited Airlines

Mon 1/262:05 amSJU - STL

2 stops12h 24mUnited Airlines

Deal found 12/25

$310

Thu 2/265:59 amMLI - SJU

2 stops13h 34mAmerican Airlines

Tue 3/34:03 pmSJU - MLI

1 stop9h 03mAmerican Airlines

Deal found 12/25

$298

Sat 1/177:45 amORD - SJU

1 stop8h 20mJetBlue

Wed 1/2111:24 amSJU - ORD

1 stop10h 12mJetBlue

Deal found 12/24

$231

Last-minute flights from Illinois to Luis Munoz Marin Intl
Discover last-minute flight deals from Illinois to Luis Munoz Marin Intl. Data last updated December 26, 2025 and is based on user searches.

Mon 1/52:15 pmORD - SJU

1 stop8h 27mFrontier

Mon 1/126:00 amSJU - ORD

1 stop14h 09mFrontier

Deal found 12/25

$201

Mon 1/58:15 amMDW - SJU

1 stop12h 00mFrontier

Wed 1/144:35 pmSJU - MDW

1 stop7h 44mFrontier

Deal found 12/24

$201

Mon 1/56:45 amORD - SJU

1 stop7h 41mJetBlue

Fri 1/1611:06 amSJU - ORD

1 stop10h 30mJetBlue

Deal found 12/26

$202

Wed 1/73:01 pmMDW - SJU

1 stop28h 36mFrontier

Mon 1/125:45 amSJU - MDW

1 stop10h 21mFrontier

Deal found 12/26

$202

Wed 1/79:34 amORD - SJU

1 stop15h 39mMultiple Airlines

Tue 1/139:00 amSJU - ORD

1 stop9h 52mMultiple Airlines

Deal found 12/25

$203

Thu 1/812:17 pmORD - SJU

Nonstop4h 32mSpirit Airlines

Wed 1/141:22 pmSJU - ORD

Nonstop5h 15mSpirit Airlines

Deal found 12/25

$199

Tue 1/1312:17 pmORD - SJU

Nonstop4h 32mSpirit Airlines

Sat 1/171:22 pmSJU - ORD

Nonstop5h 15mSpirit Airlines

Deal found 12/26

$200

Mon 1/1910:07 amMDW - SJU

1 stop8h 22mFrontier

Thu 1/224:22 pmSJU - MDW

1 stop7h 57mFrontier

Deal found 12/25

$199

Tue 1/207:45 amORD - SJU

1 stop8h 22mJetBlue

Thu 1/2211:06 amSJU - ORD

1 stop10h 30mJetBlue

Deal found 12/26

$196

Sat 1/246:57 pmORD - SJU

1 stop15h 47mMultiple Airlines

Sat 1/3111:49 amSJU - ORD

1 stop12h 55mMultiple Airlines

Deal found 12/25

$195

Sun 1/2512:17 pmORD - SJU

Nonstop4h 32mSpirit Airlines

Tue 2/31:22 pmSJU - ORD

Nonstop5h 15mSpirit Airlines

Deal found 12/24

$197

Tue 1/277:20 amORD - SJU

1 stop6h 15mSpirit Airlines

Tue 2/31:22 pmSJU - ORD

Nonstop5h 15mSpirit Airlines

Deal found 12/24

$204

One-way flights from Illinois to Luis Munoz Marin Intl
Search for one-way flight options from Illinois to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated December 26, 2025.

Sat 1/245:42 pmSTL - SJU

1 stop14h 12mFrontier

Deal found 12/25

$86

Thu 1/85:11 pmSTL - SJU

1 stop7h 39mFrontier

Deal found 12/25

$88

Sat 1/105:11 pmSTL - SJU

1 stop7h 39mFrontier

Deal found 12/25

$90

Tue 1/275:42 pmSTL - SJU

1 stop19h 44mFrontier

Deal found 12/26

$92

Tue 1/135:11 pmSTL - SJU

1 stop23h 13mFrontier

Deal found 12/26

$96

Sat 1/175:11 pmSTL - SJU

1 stop24h 48mFrontier

Deal found 12/26

$97

Sat 3/74:18 pmORD - SJU

1 stop15h 39mFrontier

Deal found 12/25

$109

Sun 1/1811:05 amMDW - SJU

2 stops12h 15mFrontier

Deal found 12/26

$109

Mon 1/195:11 pmSTL - SJU

2 stops46h 47mFrontier

Deal found 12/25

$109

Mon 1/512:39 pmORD - SJU

1 stop7h 36mFrontier

Deal found 12/25

$110

Thu 1/86:10 amMDW - SJU

1 stop7h 09mFrontier

Deal found 12/26

$110

Thu 1/295:42 pmSTL - SJU

1 stop14h 42mFrontier

Deal found 12/26

$110

Find flight deals from Illinois to Luis Munoz Marin Intl

Round-trip from	$194 (Expedia)
One-way from	$86 (Priceline)
Popular in	December
Cheapest in	January
Average price	$565
Good round-trip deal	$295 or less
Good one-way deal	$153 or less

From Illinois to San Juan Luis Munoz Marin Intl

Search Deals

One-way flight from Illinois to San Juan Luis Munoz Marin Intl

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($46 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Illinois to San Juan Luis Munoz Marin Intl.

Search Deals

Price to beat on a one-way flight from Illinois to San Juan Luis Munoz Marin Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 3/17

12:20 pm-8:26 pm

1 stop7h 06m

San Juan Luis Munoz Marin Intl

Sun 3/22

1:30 am-10:05 am

1 stop9h 35m

$196

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 1/6

10:55 am-12:14 am

1 stop11h 19m

San Juan Luis Munoz Marin Intl

Tue 1/13

11:06 am-7:36 pm

1 stop10h 30m

$202

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 3/17

6:44 am-5:23 pm

1 stop9h 39m

San Juan Luis Munoz Marin Intl

Thu 3/19

1:30 am-10:05 am

1 stop9h 35m

$211

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 2/28

12:59 pm-10:31 pm

1 stop7h 32m

San Juan Luis Munoz Marin Intl

Fri 3/13

1:30 am-10:05 am

1 stop9h 35m

$211

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Fri 2/6

7:45 am-6:05 pm

1 stop8h 20m

San Juan Luis Munoz Marin Intl

Sat 2/14

5:22 pm-11:21 pm

1 stop7h 59m

$211

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 1/27

2:20 pm-9:00 pm

Nonstop4h 40m

San Juan Luis Munoz Marin Intl

Fri 1/30

4:52 pm-8:20 pm

Nonstop5h 28m

$216

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Fri 1/30

7:45 am-6:05 pm

1 stop8h 20m

San Juan Luis Munoz Marin Intl

Sun 2/8

9:25 am-7:31 pm

1 stop12h 06m

$216

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 1/13

7:45 am-6:05 pm

1 stop8h 20m

San Juan Luis Munoz Marin Intl

Fri 1/23

11:06 am-7:36 pm

1 stop10h 30m

$216

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Mon 1/19

6:00 am-5:17 pm

1 stop9h 17m

San Juan Luis Munoz Marin Intl

Fri 1/23

6:27 pm-11:37 pm

1 stop7h 10m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 1/27

6:00 am-5:17 pm

1 stop9h 17m

San Juan Luis Munoz Marin Intl

Thu 1/29

4:30 pm-11:25 pm

1 stop8h 55m

$225

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 60 results

...

Best time to book a flight from Illinois to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport

What is the cheapest month to book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport (average of $127). Flying from Illinois to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $220). 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 SJU?

When flying from Illinois to San Juan Luis Munoz Marin Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 47% versus a flight in the morning.

What is the cheapest day to fly from Illinois to San Juan Luis Munoz Marin Intl Airport?

Travelers seeking maximum savings on their Illinois to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to San Juan Luis Munoz Marin Intl Airport

The most flights from USIL to SJU are scheduled on a Monday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

How much does it cost to fly round-trip from Illinois to San Juan Luis Munoz Marin Intl Airport?

Related info for your journey

How long is the flight from Illinois to San Juan Luis Munoz Marin Intl Airport?
JetBlue, Delta, and American Airlines can get you from Illinois to San Juan Luis Munoz Marin Intl Airport in just under 7h 06m. Your travel time can differ by up to 12h 10m. There are 2073 mi between Illinois and San Juan Luis Munoz Marin Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines to fly from Illinois to San Juan Luis Munoz Marin Intl Airport one-way?
The cheapest airlines for a one-way flight from Illinois to San Juan Luis Munoz Marin Intl Airport are JetBlue ($54), Frontier ($65), and Spirit Airlines ($92).
What are the most popular routes from Illinois to San Juan Luis Munoz Marin Intl Airport?
The most popular route from Illinois to San Juan Luis Munoz Marin Intl Airport is Chicago O'Hare Intl - San Juan Luis Munoz Marin Intl. You may also consider Chicago Midway - San Juan Luis Munoz Marin Intl or Lambert-St Louis - San Juan Luis Munoz Marin Intl.
What are the most reliable airlines from Illinois to San Juan Luis Munoz Marin Intl Airport?
Consider Air Canada (80%), United Airlines (80%) or Air New Zealand (80%) when booking your flight. These represent the most reliable airlines when flying from Illinois to San Juan Luis Munoz Marin Intl Airport.
What are the cheapest flights from Illinois to San Juan Luis Munoz Marin Intl Airport?
On average you can expect to pay $690 for a flight from Illinois to San Juan Luis Munoz Marin Intl Airport. The cheapest flight overall is $100 while the most popular route, (Chicago O'Hare Intl - San Juan Luis Munoz Marin Intl) is currently priced at $136.
Can I find deals for flights from Illinois to Luis Munoz Marin Intl that include hotel bookings?
Yes. In addition to deals on Illinois to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Luis Munoz Marin Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Luis Munoz Marin Intl.
Can I find deals for business class flights from Illinois to Luis Munoz Marin Intl?
Yes. Cheapflights offers flight deals from Illinois to Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport (average of $127). Flying from Illinois to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $220). 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

Dorado

Fajardo

Rio Grande

Humacao

Luquillo

Bayamón

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Illinois to Luis Munoz Marin Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$112	Average$292	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$144	Average$306	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$146	Average$314	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$190	Average$395	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$225	Average$599	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$290	Average$536	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$379	Average$488	FlexibilityNo cancel fee	On-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$86+ Cheap flights from Illinois to Luis Munoz Marin Intl (SJU)

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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Luis Munoz Marin Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Illinois to Luis Munoz Marin Intl

Cheapest flights from Illinois to Luis Munoz Marin IntlExplore the most affordable flight options available from Illinois to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

Explore the most affordable flight options available from Illinois to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

Find flight deals from Illinois to Luis Munoz Marin Intl

Keep the following information in mind while searching for Illinois to Luis Munoz Marin Intl flight deals. Data was last updated December 26, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to San Juan Luis Munoz Marin Intl Airport that are best for you.

Best time to book a flight from Illinois to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to San Juan Luis Munoz Marin Intl Airport

What is the cheapest month to book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport?

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

Find hourly flight availability from Illinois to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

What is the cheapest day to fly from Illinois to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Luis Munoz Marin Intl. Price data was last updated on December 16, 2024.

Weekly flight availability from Illinois to San Juan Luis Munoz Marin Intl Airport

How much does it cost to fly round-trip from Illinois to San Juan Luis Munoz Marin Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Luis Munoz Marin Intl. 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 San Juan Luis Munoz Marin Intl Airport?

What are the cheapest airlines to fly from Illinois to San Juan Luis Munoz Marin Intl Airport one-way?

What are the most popular routes from Illinois to San Juan Luis Munoz Marin Intl Airport?

What are the most reliable airlines from Illinois to San Juan Luis Munoz Marin Intl Airport?

What are the cheapest flights from Illinois to San Juan Luis Munoz Marin Intl Airport?

Can I find deals for flights from Illinois to Luis Munoz Marin Intl that include hotel bookings?

How can I find direct flights from Illinois to Luis Munoz Marin Intl?

Can I find deals for business class flights from Illinois to Luis Munoz Marin Intl?

What is the cheapest month to book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport?

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Illinois to Luis Munoz Marin Intl

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Illinois to Luis Munoz Marin Intl
Explore the most affordable flight options available from Illinois to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.