Cheap Flights from San Juan (SJU) to Ulsan (USN)

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Ulsan (USN)

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Cheap Flights from San Juan to Ulsan (SJU-USN)

Prices were available within the past 7 days and start at for one-way flights and $1,277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Feb 9 - Sun, Feb 15
SJU
San Juan
USN
Ulsan
$1,277 Roundtrip, found 4 days ago
$1,277
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Feb 9 from San Juan to Ulsan, returning Sun, Feb 15, priced at $1,277 found 4 days ago
JetBlue Airways
Fri, Feb 13 - Mon, Feb 16
SJU
San Juan
USN
Ulsan
$1,278 Roundtrip, found 4 days ago
$1,278
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, Feb 13 from San Juan to Ulsan, returning Mon, Feb 16, priced at $1,278 found 4 days ago
Delta
Mon, Feb 9 - Thu, Feb 12
SJU
San Juan
USN
Ulsan
$1,322 Roundtrip, found 4 days ago
$1,322
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Feb 9 from San Juan to Ulsan, returning Thu, Feb 12, priced at $1,322 found 4 days ago
Delta
Fri, Feb 13 - Sun, Feb 15
SJU
San Juan
USN
Ulsan
$1,350 Roundtrip, found 4 days ago
$1,350
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Feb 13 from San Juan to Ulsan, returning Sun, Feb 15, priced at $1,350 found 4 days ago
Flights from San Juan (SJU) to Ulsan (USN)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Ulsan
Roundtrip price
$1,276
Distance
8569 mi

San Juan to Ulsan Flights

The cheapest times to fly from San Juan to Ulsan

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 Ulsan are during the month of February. You can find some of the cheapest flights from San Juan to Ulsan with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Juan to Ulsan: 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 Ulsan

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 Ulsan in 2026. You can also book with separate airlines for your outbound and return journeys, from 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 Ulsan 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 Ulsan 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.

 

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN) cost?
Grab a cheap one-way flight or cheap return flight from $1,277 from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN) 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 Ulsan Airport (USN)?
The cheapest month to fly from SJU to USN is February, when there's less demand. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SJU to USN flight.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN)?
You'll need to book a flight with a layover when traveling from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SJU to USN?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a number of factors, such as the airline 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 Ulsan Airport (USN)?
To arrive at Ulsan Airport (USN) on schedule, pick a flight that takes off from Luis Munoz Marin Intl. Airport (SJU) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Ulsan Airport (USN) last-minute?
Waiting until just before your trip to book a flight from SJU to USN often results in higher prices. While you may come across some last-minute offers, there's no guarantee. Be flexible with your travel plans to maximize your chances of snagging a bargain.
Is it cheaper to book a SJU to USN flight and hotel package?
Compared with arranging flights and hotels separately, booking a SJU to USN flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place takes the hassle out of travel planning. Just pick your flights and select from our wide range of stays, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Ulsan Airport (USN)?
Typically, you're able to reschedule or cancel your SJU to USN flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want further information, visit our Customer Service portal.

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*Available to One Key members.