$348 Cheap Flights from San Juan (SJU) to Decatur (DEC)

View $348 flight on Mon, Nov 17, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Decatur, IL (DEC)

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Cheap Flights from San Juan to Decatur (SJU-DEC)

Prices were available within the past 7 days and start at $348 for one-way flights and $575 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Nov 19 - Mon, Dec 1
SJU
San Juan
DEC
Decatur
$575 Roundtrip, found 1 day ago
$575
Roundtrip
found 1 day ago
Select United flight, departing Wed, Nov 19 from San Juan to Decatur, returning Mon, Dec 1, priced at $575 found 1 day ago
United
Wed, Nov 19 - Wed, Dec 3
SJU
San Juan
DEC
Decatur
$590 Roundtrip, found 1 day ago
$590
Roundtrip
found 1 day ago
Select United flight, departing Wed, Nov 19 from San Juan to Decatur, returning Wed, Dec 3, priced at $590 found 1 day ago
United
Fri, Nov 21 - Mon, Dec 1
SJU
San Juan
DEC
Decatur
$602 Roundtrip, found 1 day ago
$602
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 21 from San Juan to Decatur, returning Mon, Dec 1, priced at $602 found 1 day ago
United
Wed, Nov 19 - Fri, Dec 5
SJU
San Juan
DEC
Decatur
$605 Roundtrip, found 1 day ago
$605
Roundtrip
found 1 day ago
Select United flight, departing Wed, Nov 19 from San Juan to Decatur, returning Fri, Dec 5, priced at $605 found 1 day ago
United
Fri, Nov 21 - Wed, Dec 3
SJU
San Juan
DEC
Decatur
$622 Roundtrip, found 1 day ago
$622
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 21 from San Juan to Decatur, returning Wed, Dec 3, priced at $622 found 1 day ago
United
Mon, Nov 17 - Mon, Dec 1
SJU
San Juan
DEC
Decatur
$635 Roundtrip, found 1 day ago
$635
Roundtrip
found 1 day ago
Select United flight, departing Mon, Nov 17 from San Juan to Decatur, returning Mon, Dec 1, priced at $635 found 1 day ago
United
Fri, Nov 21 - Fri, Dec 5
SJU
San Juan
DEC
Decatur
$642 Roundtrip, found 1 day ago
$642
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 21 from San Juan to Decatur, returning Fri, Dec 5, priced at $642 found 1 day ago
United
Mon, Nov 17 - Fri, Dec 5
SJU
San Juan
DEC
Decatur
$650 Roundtrip, found 1 day ago
$650
Roundtrip
found 1 day ago
Select United flight, departing Mon, Nov 17 from San Juan to Decatur, returning Fri, Dec 5, priced at $650 found 1 day ago
United
Tue, Nov 18 - Fri, Dec 5
SJU
San Juan
DEC
Decatur
$652 Roundtrip, found 1 day ago
$652
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 18 from San Juan to Decatur, returning Fri, Dec 5, priced at $652 found 1 day ago
United
Thu, Nov 20 - Sun, Nov 30
SJU
San Juan
DEC
Decatur
$653 Roundtrip, found 1 day ago
$653
Roundtrip
found 1 day ago
Select United flight, departing Thu, Nov 20 from San Juan to Decatur, returning Sun, Nov 30, priced at $653 found 1 day ago

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC) cost?
Grab a cheap one-way flight from $348 or cheap return flight from $575 from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC)?
November is the cheapest month to fly from SJU to DEC. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SJU to DEC flight.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC)?
There are no daily nonstop flights from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from SJU to DEC?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC)?
Opt for a flight from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC) that takes off before 3 PM to reduce the risk of cancellations. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC) last-minute?
Booking your plane ticket from SJU to DEC shortly before your journey is usually more expensive. However, if you're flexible with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a SJU to DEC flight and hotel package?
Securing a SJU to DEC flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Decatur Airport (DEC)?
If you reserved your SJU to DEC flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
Decatur
Roundtrip price
$575
Distance
2010 mi

Book with confidence

San Juan to Decatur Flights

The cheapest times to fly from San Juan to Decatur

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to Decatur are during the month of November. You can find some of the cheapest flights from San Juan to Decatur with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to Decatur

Sunday is one of the best days to book for cheap flights from San Juan to Decatur: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to Decatur

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to Decatur in 2025. You can also book with separate airlines for your outbound and return journeys, from $348 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to Decatur flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to Decatur airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Juan to Decatur Flights

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*Available to One Key members.