$340 Cheap Flights from San Juan (SJU) to Dublin (DUB)

View $340 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Dublin Airport (DUB)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from San Juan to Dublin (SJU-DUB)

Prices were available within the past 7 days and start at $340 for one-way flights and $511 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Aug 5 - Tue, Aug 26
SJU
San Juan
DUB
Dublin
$511 Roundtrip, found 5 days ago
$511
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 5 from San Juan to Dublin, returning Tue, Aug 26, priced at $511 found 5 days ago
American Airlines
Tue, Mar 3 - Thu, Mar 12
SJU
San Juan
DUB
Dublin
$516 Roundtrip, found 4 days ago
$516
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Mar 3 from San Juan to Dublin, returning Thu, Mar 12, priced at $516 found 4 days ago
United
Mon, Aug 11 - Tue, Aug 26
SJU
San Juan
DUB
Dublin
$518 Roundtrip, found 5 days ago
$518
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 11 from San Juan to Dublin, returning Tue, Aug 26, priced at $518 found 5 days ago
United
Mon, Oct 20 - Tue, Nov 4
SJU
San Juan
DUB
Dublin
$519 Roundtrip, found 3 days ago
$519
Roundtrip
found 3 days ago
Select United flight, departing Mon, Oct 20 from San Juan to Dublin, returning Tue, Nov 4, priced at $519 found 3 days ago
Delta
Sun, Aug 17 - Tue, Aug 26
SJU
San Juan
DUB
Dublin
$523 Roundtrip, found 5 days ago
$523
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, Aug 17 from San Juan to Dublin, returning Tue, Aug 26, priced at $523 found 5 days ago
Delta
Mon, Oct 20 - Tue, Nov 4
SJU
San Juan
DUB
Dublin
$523 Roundtrip, found 3 days ago
$523
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Oct 20 from San Juan to Dublin, returning Tue, Nov 4, priced at $523 found 3 days ago
American Airlines
Tue, Mar 3 - Thu, Mar 12
SJU
San Juan
DUB
Dublin
$527 Roundtrip, found 4 days ago
$527
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Mar 3 from San Juan to Dublin, returning Thu, Mar 12, priced at $527 found 4 days ago
United
Tue, Aug 19 - Tue, Aug 26
SJU
San Juan
DUB
Dublin
$536 Roundtrip, found 5 days ago
$536
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 19 from San Juan to Dublin, returning Tue, Aug 26, priced at $536 found 5 days ago
JetBlue Airways
Tue, Oct 7 - Tue, Oct 14
SJU
San Juan
DUB
Dublin
$549 Roundtrip, found 7 hours ago
$549
Roundtrip
found 7 hours ago
Select JetBlue Airways flight, departing Tue, Oct 7 from San Juan to Dublin, returning Tue, Oct 14, priced at $549 found 7 hours ago
Lufthansa
Tue, Oct 28 - Tue, Nov 11
SJU
San Juan
DUB
Dublin
$557 Roundtrip, found 6 days ago
$557
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Tue, Oct 28 from San Juan to Dublin, returning Tue, Nov 11, priced at $557 found 6 days ago
Flights from San Juan (SJU) to Dublin (DUB)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, TAP Portugal, United
Roundtrip price
$511
Distance
3966 mi

San Juan to Dublin Flights

The cheapest times to fly from San Juan to Dublin

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

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

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

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 Dublin in 2025. You can also book with separate airlines for your outbound and return journeys, from $340 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 Dublin 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 Dublin 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 Dublin Airport (DUB) cost?
Discover the latest flight deals from SJU to DUB by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SJU to DUB?
The cheapest flights from SJU to DUB are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SJU to DUB?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SJU to DUB. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Dublin Airport (DUB)?
You’ll have to book a flight with a layover when traveling from Luis Munoz Marin Intl. Airport (SJU) to Dublin Airport (DUB). Direct flights don’t operate daily on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SJU to DUB?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change 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 Dublin Airport (DUB)?
To touch down at Dublin Airport (DUB) on schedule, book a flight that leaves Luis Munoz Marin Intl. Airport (SJU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Dublin Airport (DUB) last-minute?
Last-minute fares from SJU to DUB are generally more expensive. To secure the cheapest rates, start searching for flights as early as possible. That being said, if you can play around with your travel dates, it’s possible to score a cheap fare right before your journey.
Is it cheaper to book a SJU to DUB flight and hotel package?
Compared with arranging hotels and flights separately, booking a SJU to DUB flight and hotel package with Expedia could lead to significant savings. Better yet, managing everything in one place takes the hassle out of travel planning. Simply pick your flights and select from our wide range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Dublin Airport (DUB)?
If you booked your SJU to DUB flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Explore a world of travel with Expedia

*Available to One Key members.