Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to San Juan from $90

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 1/7. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
5:11 pm - 2:50 amSTL-SJU
7h 39m1 stop
Frontier Logo
3:55 am - 7:50 amSJU-STL
29h 55m1 stop
$180Frontier
Find Deal
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
3:30 pm - 2:50 amSTL-SJU
9h 20m1 stop
Frontier Logo
4:07 pm - 10:33 pmSJU-STL
8h 26m1 stop
$192Frontier
Find Deal
Tue, Dec 9 - Mon, Jan 12
Spirit Airlines Logo
5:40 am - 12:22 pmORD-SJU
4h 42mnonstop
Spirit Airlines Logo
4:10 am - 11:08 amSJU-ORD
8h 58m1 stop
$209Spirit Airlines
Find Deal
Wed, Dec 10 - Fri, Dec 12
Spirit Airlines Logo
1:52 pm - 11:25 pmORD-SJU
7h 33m1 stop
Spirit Airlines Logo
8:08 pm - 11:25 pmSJU-ORD
5h 17mnonstop
$210Spirit Airlines
Find Deal
Sun, Dec 14 - Sat, Dec 20
JetBlue Logo
7:45 am - 6:02 pmORD-SJU
8h 17m1 stop
JetBlue Logo
5:22 pm - 11:10 pmSJU-ORD
7h 48m1 stop
$211JetBlue
Find Deal
Fri, Feb 6 - Sat, Feb 14
United Airlines Logo
6:00 am - 4:36 pmSTL-SJU
8h 36m1 stop
United Airlines Logo
2:05 am - 10:41 amSJU-STL
10h 36m1 stop
$211United Airlines
Find Deal
Sun, Feb 1 - Tue, Feb 10
Multiple Airlines Logo
5:45 am - 12:26 pmORD-SJU
4h 41mnonstop
Multiple Airlines Logo
10:47 pm - 8:09 amSJU-ORD
11h 22m1 stop
$213Multiple Airlines
Find Deal
Tue, Jan 6 - Fri, Jan 9
JetBlue Logo
8:45 am - 7:13 pmORD-SJU
8h 28m1 stop
JetBlue Logo
10:25 am - 7:45 pmSJU-ORD
11h 20m1 stop
$214JetBlue
Find Deal
Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
5:35 pm - 12:49 amEVV-SJU
29h 14m2 stops
Multiple Airlines Logo
11:38 am - 4:55 pmSJU-EVV
7h 17m1 stop
$301Multiple Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
United Airlines Logo
1:24 pm - 12:36 amPIA-SJU
9h 12m2 stops
United Airlines Logo
2:05 am - 12:38 pmSJU-PIA
12h 33m2 stops
$325United Airlines
Find Deal
Mon, Jan 26 - Fri, Jan 30

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

Our best Southwest deals on Illinois to San Juan Luis Munoz Marin Intl Airport flight tickets
Southwest
Jan 24
MDW1:00 pmChicago Midway
9h 10m
1 stop
SJU12:10 amSan Juan Luis Munoz Marin Intl
Jan 29
SJU9:05 amSan Juan Luis Munoz Marin Intl
11h 30m
1 stop
MDW6:35 pmChicago Midway
$245
Find similar
Southwest
Feb 5
MDW6:10 amChicago Midway
13h 40m
1 stop
SJU9:50 pmSan Juan Luis Munoz Marin Intl
Feb 10
SJU9:05 amSan Juan Luis Munoz Marin Intl
11h 30m
1 stop
MDW6:35 pmChicago Midway
$252
Find similar
Southwest
Feb 5
STL1:45 pmLambert-St Louis
6h 05m
1 stop
SJU9:50 pmSan Juan Luis Munoz Marin Intl
Feb 10
SJU5:40 amSan Juan Luis Munoz Marin Intl
7h 35m
1 stop
STL11:15 amLambert-St Louis
$262
Find similar

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
Feb 21
STL5:11 pmLambert-St Louis
7h 39m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
Feb 25
SJU3:55 amSan Juan Luis Munoz Marin Intl
20h 38m
1 stop
STL10:33 pmLambert-St Louis
$180
Find similar
Frontier
Dec 9
STL3:30 pmLambert-St Louis
9h 20m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
Jan 12
SJU4:07 pmSan Juan Luis Munoz Marin Intl
8h 26m
1 stop
STL10:33 pmLambert-St Louis
$192
Find similar
Frontier
Dec 4
STL3:30 pmLambert-St Louis
16h 25m
1 stop
SJU9:55 amSan Juan Luis Munoz Marin Intl
Dec 8
SJU3:55 amSan Juan Luis Munoz Marin Intl
20h 38m
1 stop
STL10:33 pmLambert-St Louis
$201
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 November 23, 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

Sat 2/21

5:11 pm-2:50 am

1 stop7h 39m

San Juan Luis Munoz Marin Intl

Wed 2/25

3:55 am-7:50 am

1 stop29h 55m

$180

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 12/9

3:30 pm-2:50 am

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Mon 1/12

4:07 pm-10:33 pm

1 stop8h 26m

$192

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Wed 12/10

5:40 am-12:22 pm

Nonstop4h 42m

San Juan Luis Munoz Marin Intl

Fri 12/12

4:10 am-11:08 am

1 stop8h 58m

$209

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sun 12/14

1:52 pm-11:25 pm

1 stop7h 33m

San Juan Luis Munoz Marin Intl

Sat 12/20

8:08 pm-11:25 pm

Nonstop5h 17m

$210

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Fri 2/6

7:45 am-6:02 pm

1 stop8h 17m

San Juan Luis Munoz Marin Intl

Sat 2/14

5:22 pm-11:10 pm

1 stop7h 48m

$211

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 2/1

6:00 am-4:36 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Tue 2/10

2:05 am-10:41 am

1 stop10h 36m

$211

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 1/6

5:45 am-12:26 pm

Nonstop4h 41m

San Juan Luis Munoz Marin Intl

Fri 1/9

10:47 pm-8:09 am

1 stop11h 22m

$213

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 1/17

8:45 am-7:13 pm

1 stop8h 28m

San Juan Luis Munoz Marin Intl

Sat 1/24

10:25 am-7:45 pm

1 stop11h 20m

$214

EvansvilleSan Juan

EVV - SJU

EVVSJU

Evansville Dress Regional

Mon 12/8

5:35 pm-12:49 am

2 stops29h 14m

San Juan Luis Munoz Marin Intl

Fri 12/12

11:38 am-4:55 pm

1 stop7h 17m

$301

PeoriaSan Juan

PIA - SJU

PIASJU

Greater Peoria

Mon 1/26

1:24 pm-12:36 am

2 stops9h 12m

San Juan Luis Munoz Marin Intl

Fri 1/30

2:05 am-12:38 pm

2 stops12h 33m

$325

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to San Juan from

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 April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $353.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $393. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday 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 $444.

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 $314. Flights in the morning are often more expensive with an average ticket price of $450.

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 $392 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 $335 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.

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

$181

Fastest flight time

4h 15m

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 $181. 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 $358.
The fastest flight from Illinois to San Juan Luis Munoz Marin Intl Airport takes 4h 15m
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
3,100 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $139Free CancellationRating
6.3
8,160 reviews
Search Spirit Airlines flights
DeltaPriceFrom $196Free CancellationRating
7.9
7,999 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
JetBluePriceFrom $271Free CancellationRating
7.2
2,901 reviews
Search JetBlue flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,035 reviews
Search United Airlines flights
SouthwestPriceFrom $380Free CancellationRating
8.0
4,251 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.

An easier way to manage your San Juan Luis Munoz Marin Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 12/23
Tue 12/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to San Juan