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Cheap flights from Illinois to San Juan from $97

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Juan departing on 4/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:24 pm - 11:02 pm
ORD
-
SJU
25h 38m
1 stop
Frontier Logo
8:10 pm - 12:25 am
SJU
-
ORD
5h 15mnonstop
$192Frontier
Sun, May 17 - Fri, May 29
Spirit Airlines Logo
7:50 am - 2:06 am
ORD
-
SJU
17h 16m
1 stop
Spirit Airlines Logo
3:21 am - 2:05 pm
SJU
-
ORD
11h 44m
1 stop
$193Spirit Airlines
Mon, May 4 - Fri, May 8
Multiple Airlines Logo
10:55 am - 11:58 pm
ORD
-
SJU
12h 03m
1 stop
Multiple Airlines Logo
3:03 pm - 10:39 pm
SJU
-
ORD
8h 36m
1 stop
$200Multiple Airlines
Mon, Apr 13 - Thu, Apr 30
Frontier Logo
7:20 am - 12:33 pm
ORD
-
SJU
28h 13m
1 stop
Frontier Logo
10:54 am - 3:08 pm
SJU
-
ORD
29h 14m
1 stop
$201Frontier
Fri, Apr 10 - Wed, Apr 15
Frontier Logo
9:32 am - 12:51 am
ORD
-
SJU
14h 19m
1 stop
Frontier Logo
11:30 am - 11:59 pm
SJU
-
ORD
13h 29m
1 stop
$202Frontier
Sat, Apr 11 - Thu, Apr 16
Multiple Airlines Logo
10:55 am - 11:58 pm
ORD
-
SJU
12h 03m
1 stop
Multiple Airlines Logo
11:30 am - 11:59 pm
SJU
-
ORD
13h 29m
1 stop
$204Multiple Airlines
Tue, Mar 31 - Thu, Apr 16
American Airlines Logo
6:29 am - 10:05 pm
STL
-
SJU
14h 36m
1 stop
American Airlines Logo
11:59 pm - 8:54 am
SJU
-
STL
9h 55m
1 stop
$227American Airlines
Wed, Apr 22 - Thu, Apr 30
United Airlines Logo
9:21 am - 8:34 pm
STL
-
SJU
10h 13m
1 stop
United Airlines Logo
1:00 am - 10:48 am
SJU
-
STL
10h 48m
2 stops
$242United Airlines
Sun, May 3 - Sat, May 9
American Airlines Logo
6:00 am - 8:55 pm
PIA
-
SJU
13h 55m
2 stops
American Airlines Logo
7:25 am - 10:58 pm
SJU
-
PIA
16h 33m
1 stop
$311American Airlines
Sat, May 16 - Tue, May 19
United Airlines Logo
10:45 am - 9:24 pm
PIA
-
SJU
9h 39m
2 stops
United Airlines Logo
1:00 am - 12:57 pm
SJU
-
PIA
12h 57m
2 stops
$363United Airlines
Sat, May 16 - Mon, May 18

Delta flights from Illinois to San Juan Luis Munoz Marin Intl Airport

Our best Delta deals on Illinois to San Juan Luis Munoz Marin Intl Airport flight tickets
Delta
Jun 19
STL11:51 amLambert-St Louis
7h 02m
1 stop
SJU7:53 pmSan Juan Luis Munoz Marin Intl
Jun 24
SJU7:30 amSan Juan Luis Munoz Marin Intl
6h 24m
1 stop
STL12:54 pmLambert-St Louis
$276
Delta
May 3
STL9:59 amLambert-St Louis
9h 25m
1 stop
SJU8:24 pmSan Juan Luis Munoz Marin Intl
May 6
SJU5:34 pmSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
STL11:36 pmLambert-St Louis
$313
Delta
Jun 2
STL9:13 amLambert-St Louis
6h 20m
1 stop
SJU4:33 pmSan Juan Luis Munoz Marin Intl
Jun 9
SJU5:48 pmSan Juan Luis Munoz Marin Intl
6h 50m
1 stop
STL11:38 pmLambert-St Louis
$316

Spirit Airlines flights from Illinois to San Juan Luis Munoz Marin Intl Airport

Our best Spirit Airlines deals on Illinois to San Juan Luis Munoz Marin Intl Airport flight tickets
Spirit Airlines
May 4
ORD7:50 amChicago O'Hare Intl
17h 16m
1 stop
SJU2:06 amSan Juan Luis Munoz Marin Intl
May 8
SJU3:21 amSan Juan Luis Munoz Marin Intl
11h 44m
1 stop
ORD2:05 pmChicago O'Hare Intl
$193
Spirit Airlines
May 12
ORD10:00 amChicago O'Hare Intl
4h 39m
SJU3:39 pmSan Juan Luis Munoz Marin Intl
May 17
SJU3:21 amSan Juan Luis Munoz Marin Intl
10h 44m
1 stop
ORD1:05 pmChicago O'Hare Intl
$206
Spirit Airlines
Mar 31
ORD10:55 amChicago O'Hare Intl
12h 03m
1 stop
SJU11:58 pmSan Juan Luis Munoz Marin Intl
Apr 7
SJU1:29 amSan Juan Luis Munoz Marin Intl
5h 16m
ORD5:45 amChicago O'Hare Intl
$208

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to San Juan Luis Munoz Marin Intl Airport 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, momondo users made 832,500 searches. Data last updated March 14, 2026.
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

Cheapest round-trip

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sun 5/17

8:24 pm-11:02 pm

1 stop25h 38m

San Juan Luis Munoz Marin Intl

Fri 5/29

8:10 pm-12:25 am

Nonstop5h 15m

$192

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Mon 5/4

7:50 am-2:06 am

1 stop17h 16m

San Juan Luis Munoz Marin Intl

Fri 5/8

3:21 am-2:05 pm

1 stop11h 44m

$193
Quickest round-trip

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Mon 4/13

10:55 am-11:58 pm

1 stop12h 03m

San Juan Luis Munoz Marin Intl

Thu 4/30

3:03 pm-10:39 pm

1 stop8h 36m

$200

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Fri 4/10

7:20 am-12:33 pm

1 stop28h 13m

San Juan Luis Munoz Marin Intl

Wed 4/15

10:54 am-3:08 pm

1 stop29h 14m

$201

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 4/11

9:32 am-12:51 am

1 stop14h 19m

San Juan Luis Munoz Marin Intl

Thu 4/16

11:30 am-11:59 pm

1 stop13h 29m

$202

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 3/31

10:55 am-11:58 pm

1 stop12h 03m

San Juan Luis Munoz Marin Intl

Thu 4/16

11:30 am-11:59 pm

1 stop13h 29m

$204

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 4/22

6:29 am-10:05 pm

1 stop14h 36m

San Juan Luis Munoz Marin Intl

Thu 4/30

11:59 pm-8:54 am

1 stop9h 55m

$227

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 5/3

9:21 am-8:34 pm

1 stop10h 13m

San Juan Luis Munoz Marin Intl

Sat 5/9

1:00 am-10:48 am

2 stops10h 48m

$242

PeoriaSan Juan

PIA - SJU

PIASJU

Greater Peoria

Sat 5/16

6:00 am-8:55 pm

2 stops13h 55m

San Juan Luis Munoz Marin Intl

Tue 5/19

7:25 am-10:58 pm

1 stop16h 33m

$311

PeoriaSan Juan

PIA - SJU

PIASJU

Greater Peoria

Sat 5/16

10:45 am-9:24 pm

2 stops9h 39m

San Juan Luis Munoz Marin Intl

Mon 5/18

1:00 am-12:57 pm

2 stops12h 57m

$363

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Illinois to San Juan Luis Munoz Marin Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $350.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Illinois is on a Monday. momondo users have found tickets for Monday departures for as low as $381. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $454.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is in the evening when flights can be purchased for as low as $361. Flights at noon are often more expensive with an average ticket price of $486.

What is the cheapest Illinois to San Juan Luis Munoz Marin Intl flight route?

Fly from Chicago O'Hare Intl to San Juan Luis Munoz Marin Intl for the best Illinois - San Juan Luis Munoz Marin Intl flight prices

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $384 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Illinois for as low as $340 on momondo.

What cabin class options are available on Illinois to San Juan Luis Munoz Marin Intl flights?

There are 4 cabin classes available to choose from on Illinois to San Juan Luis Munoz Marin Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 22% on your flight if you consider stops on a Illinois to San Juan Luis Munoz Marin Intl Airport flight.

Cheap Illinois to San Juan Luis Munoz Marin Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to San Juan Luis Munoz Marin Intl Airport

Best Price Found

$167

Fastest flight time

4h 31m

Direct flights

Every day
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from Illinois in the past 72 hours is $167. The best round-trip flight deal from Illinois to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is $311.
The fastest flight from Illinois to San Juan Luis Munoz Marin Intl Airport takes 4h 31m
Direct flights go from Illinois to San Juan Luis Munoz Marin Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Illinois to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Illinois to San Juan Luis Munoz Marin Intl Airport refresh daily.

  • How many operators does momondo search for flights from Illinois to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Illinois to San Juan Luis Munoz Marin Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The required travel and health documents for your San Juan Luis Munoz Marin Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Illinois to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Illinois to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $112Free CancellationRating
5.7
3,032 reviews
Search Frontier flights
JetBluePriceFrom $119Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
DeltaPriceFrom $132Free CancellationRating
7.9
8,291 reviews
Search Delta flights
Spirit AirlinesPriceFrom $138Free CancellationRating
6.3
8,519 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,464 reviews
Search American Airlines flights
United AirlinesPriceFrom $254Free CancellationRating
7.4
9,423 reviews
Search United Airlines flights
SouthwestPriceFrom $377Free CancellationRating
8.0
4,317 reviews
Search Southwest flights

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Caguas
Rio Grande
Humacao
Bayamón

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to San Juan?

It is quick and easy to find Illinois to San Juan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Juan that suits you.

Can I find flights from Illinois to San Juan with flexible booking policies on momondo?

Flights from Illinois to San Juan with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to San Juan?

Once all potential Illinois to San Juan flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to San Juan right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Juan, momondo offers a useful price alert feature which will track prices for flights to San Juan from Illinois and alert you when they change.

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