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Cheap flights from Illinois to San Juan from $92

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 8/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to San Juan

Cheap round-trip flights

American Airlines Logo
5:18 am - 2:15 pmSTL-SJU
7h 57m1 stop
American Airlines Logo
1:40 pm - 11:59 pmSJU-STL
11h 19m1 stop
$205American Airlines
Find Deal
Sun, Sep 21 - Sat, Sep 27
Spirit Airlines Logo
6:56 am - 3:10 pmORD-SJU
7h 14m1 stop
Spirit Airlines Logo
10:16 pm - 9:22 amSJU-ORD
12h 06m1 stop
$213Spirit Airlines
Find Deal
Mon, Aug 25 - Fri, Aug 29
United Airlines Logo
6:15 am - 3:42 pmSTL-SJU
8h 27m1 stop
United Airlines Logo
1:05 am - 2:19 pmSJU-STL
14h 14m2 stops
$220United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23
Logo
6:56 am - 3:10 pmORD-SJU
7h 14m1 stop
Logo
3:39 am - 7:44 pmSJU-ORD
17h 05m1 stop
$236
Find Deal
Mon, Aug 25 - Wed, Sep 24
Logo
2:45 pm - 12:45 amORD-SJU
9h 00m1 stop
Logo
8:15 am - 12:31 pmSJU-ORD
5h 16mnonstop
$242
Find Deal
Sat, Oct 11 - Wed, Oct 15
Frontier Logo
6:20 am - 2:09 pmMDW-SJU
6h 49m1 stop
Frontier Logo
4:18 pm - 11:25 pmSJU-MDW
8h 07m1 stop
$258Frontier
Find Deal
Mon, Oct 20 - Sat, Oct 25
Frontier Logo
6:20 am - 2:09 pmMDW-SJU
6h 49m1 stop
Frontier Logo
3:40 am - 10:21 amSJU-MDW
7h 41m1 stop
$259Frontier
Find Deal
Mon, Oct 20 - Fri, Oct 24
Southwest Logo
8:55 am - 10:45 pmSTL-SJU
12h 50m2 stops
Southwest Logo
5:05 am - 1:50 pmSJU-STL
9h 45m2 stops
$284Southwest
Find Deal
Wed, Oct 15 - Wed, Oct 29
United Airlines Logo
6:35 am - 2:44 pmSTL-SJU
7h 09m1 stop
United Airlines Logo
1:05 am - 2:27 pmSJU-STL
14h 22m2 stops
$295United Airlines
Find Deal
Mon, Sep 22 - Fri, Sep 26
Southwest Logo
7:50 am - 9:45 pmSTL-SJU
11h 55m1 stop
Southwest Logo
5:40 am - 10:20 amSJU-STL
6h 40m1 stop
$296Southwest
Find Deal
Thu, Nov 13 - Sun, Nov 16

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

Our best Frontier deals on Illinois to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Oct 20
MDW6:20 amChicago Midway
6h 49m
1 stop
SJU2:09 pmSan Juan Luis Munoz Marin Intl
Oct 25
SJU4:18 pmSan Juan Luis Munoz Marin Intl
8h 07m
1 stop
MDW11:25 pmChicago Midway
$258
Find similar
Frontier
Oct 20
MDW6:20 amChicago Midway
6h 49m
1 stop
SJU2:09 pmSan Juan Luis Munoz Marin Intl
Oct 24
SJU3:40 amSan Juan Luis Munoz Marin Intl
7h 41m
1 stop
MDW10:21 amChicago Midway
$259
Find similar
Frontier
Sep 20
MDW10:51 amChicago Midway
12h 08m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 25
SJU3:16 pmSan Juan Luis Munoz Marin Intl
9h 04m
1 stop
MDW11:20 pmChicago Midway
$260
Find similar

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
Aug 25
ORD6:56 amChicago O'Hare Intl
7h 14m
1 stop
SJU3:10 pmSan Juan Luis Munoz Marin Intl
Aug 29
SJU10:16 pmSan Juan Luis Munoz Marin Intl
12h 06m
1 stop
ORD9:22 amChicago O'Hare Intl
$213
Find similar
Spirit Airlines
Sep 20
ORD6:44 pmChicago O'Hare Intl
15h 20m
1 stop
SJU11:04 amSan Juan Luis Munoz Marin Intl
Sep 25
SJU11:59 amSan Juan Luis Munoz Marin Intl
6h 40m
1 stop
ORD5:39 pmChicago O'Hare Intl
$215
Find similar
Spirit Airlines
Aug 23
ORD6:56 amChicago O'Hare Intl
16h 01m
1 stop
SJU11:57 pmSan Juan Luis Munoz Marin Intl
Sep 6
SJU6:44 amSan Juan Luis Munoz Marin Intl
10h 28m
1 stop
ORD4:12 pmChicago O'Hare Intl
$216
Find similar

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 August 15, 2025.
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

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 9/21

5:18 am-2:15 pm

1 stop7h 57m

San Juan Luis Munoz Marin Intl

Sat 9/27

1:40 pm-11:59 pm

1 stop11h 19m

$205

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Mon 8/25

6:56 am-3:10 pm

1 stop7h 14m

San Juan Luis Munoz Marin Intl

Fri 8/29

10:16 pm-9:22 am

1 stop12h 06m

$213

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 9/16

6:15 am-3:42 pm

1 stop8h 27m

San Juan Luis Munoz Marin Intl

Tue 9/23

1:05 am-2:19 pm

2 stops14h 14m

$220

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Mon 8/25

6:56 am-3:10 pm

1 stop7h 14m

San Juan Luis Munoz Marin Intl

Wed 9/24

3:39 am-7:44 pm

1 stop17h 05m

$236

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 10/11

2:45 pm-12:45 am

1 stop9h 00m

San Juan Luis Munoz Marin Intl

Wed 10/15

8:15 am-12:31 pm

Nonstop5h 16m

$242

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Mon 10/20

6:20 am-2:09 pm

1 stop6h 49m

San Juan Luis Munoz Marin Intl

Sat 10/25

4:18 pm-11:25 pm

1 stop8h 07m

$258

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Mon 10/20

6:20 am-2:09 pm

1 stop6h 49m

San Juan Luis Munoz Marin Intl

Fri 10/24

3:40 am-10:21 am

1 stop7h 41m

$259

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 10/15

8:55 am-10:45 pm

2 stops12h 50m

San Juan Luis Munoz Marin Intl

Wed 10/29

5:05 am-1:50 pm

2 stops9h 45m

$284

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Mon 9/22

6:35 am-2:44 pm

1 stop7h 09m

San Juan Luis Munoz Marin Intl

Fri 9/26

1:05 am-2:27 pm

2 stops14h 22m

$295

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Thu 11/13

7:50 am-9:45 pm

1 stop11h 55m

San Juan Luis Munoz Marin Intl

Sun 11/16

5:40 am-10:20 am

1 stop6h 40m

$296

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 September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $309.

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 $394. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday 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 $446.

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 $306. Flights in the morning are often more expensive with an average ticket price of $445.

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 $383 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 $306 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 1% 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

$92

Fastest flight time

4h 39m

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 $92. 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 $205.
The fastest flight from Illinois to San Juan Luis Munoz Marin Intl Airport takes 4h 39m
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 $106Free CancellationRating
5.8
3,211 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $139Free CancellationRating
6.3
8,042 reviews
Search Spirit Airlines flights
DeltaPriceFrom $190Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $194Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $273Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
JetBluePriceFrom $287Free CancellationRating
7.2
2,916 reviews
Search JetBlue flights
SouthwestPriceFrom $352Free CancellationRating
8.0
4,246 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
Humacao
Rio Grande
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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