Cheap Flights from San Antonio (SAT) to Ulsan (USN)

Popular airlines from San Antonio International Airport (SAT) to Ulsan (USN)

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Cheap Flights from San Antonio to Ulsan (SAT-USN)

Prices were available within the past 7 days and start at for one-way flights and $1,213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Jan 11 - Mon, Jan 19
SAT
San Antonio
USN
Ulsan
$1,213 Roundtrip, found 1 day ago
$1,213
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Jan 11 from San Antonio to Ulsan, returning Mon, Jan 19, priced at $1,213 found 1 day ago
Delta
Sun, Jan 11 - Sat, Jan 17
SAT
San Antonio
USN
Ulsan
$1,214 Roundtrip, found 1 day ago
$1,214
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Jan 11 from San Antonio to Ulsan, returning Sat, Jan 17, priced at $1,214 found 1 day ago
Delta
Mon, Jan 12 - Mon, Jan 19
SAT
San Antonio
USN
Ulsan
$1,220 Roundtrip, found 1 day ago
$1,220
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Jan 12 from San Antonio to Ulsan, returning Mon, Jan 19, priced at $1,220 found 1 day ago
Delta
Sat, Jan 17 - Wed, Jan 21
SAT
San Antonio
USN
Ulsan
$1,221 Roundtrip, found 1 day ago
$1,221
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Jan 17 from San Antonio to Ulsan, returning Wed, Jan 21, priced at $1,221 found 1 day ago
Korean Air
Mon, Jan 12 - Sat, Jan 17
SAT
San Antonio
USN
Ulsan
$1,222 Roundtrip, found 1 day ago
$1,222
Roundtrip
found 1 day ago
Select Korean Air flight, departing Mon, Jan 12 from San Antonio to Ulsan, returning Sat, Jan 17, priced at $1,222 found 1 day ago
Delta
Tue, Mar 10 - Sun, Apr 5
SAT
San Antonio
USN
Ulsan
$1,235 Roundtrip, found 1 day ago
$1,235
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Mar 10 from San Antonio to Ulsan, returning Sun, Apr 5, priced at $1,235 found 1 day ago
Flights from San Antonio (SAT) to Ulsan (USN)
Origin airport
San Antonio Intl.
Destination airport
Ulsan
Roundtrip price
$1,212
Distance
6967 mi

San Antonio to Ulsan Flights

The cheapest times to fly from San Antonio 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 Antonio to Ulsan are during the month of January. You can find some of the cheapest flights from San Antonio to Ulsan with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Antonio 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 Antonio 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 Antonio 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 Antonio 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 Antonio 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 San Antonio Intl. Airport (SAT) to Ulsan Airport (USN) cost?
Grab a cheap one-way flight or cheap return flight from $1,213 from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN)?
The cheapest month to fly from SAT to USN is January, when there's less demand. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN)?
To find the cheapest airline flying from SAT to USN, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN)?
You'll have to catch a flight with a layover if you're traveling from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from SAT to USN?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Antonio Intl. Airport (SAT) to Ulsan Airport (USN)?
To reach Ulsan Airport (USN) on schedule, select a flight that takes off from San Antonio Intl. Airport (SAT) before 3 PM. The likelihood 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 San Antonio Intl. Airport (SAT) to Ulsan Airport (USN) last-minute?
Last-minute bookings from SAT to USN are usually more expensive. To lock in the best rates, start looking for flights ahead of time. That being said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a SAT to USN flight and hotel package?
Opting for a SAT to USN flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our wide range of hotels and then add activities, car rentals 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 San Antonio Intl. Airport (SAT) to Ulsan Airport (USN)?
If you reserved your SAT to USN flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type 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, head to our Customer Service portal for more information.

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*Available to One Key members.