Find flights
When to book
FAQs

Cheap flights from Ireland to San Juan from £321

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SJU
14 Mar — 21 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to San Juan

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to San Juan
Explore the most affordable flight options available from Ireland to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 February 2026.

Mon 11/511:40
DUB
-
SJU
1 stop14h 21m
JetBlue
Thu 14/515:00
SJU
-
DUB
1 stop13h 00m
JetBlue
Deal found 10/2£397
Thu 7/511:40
DUB
-
SJU
1 stop19h 27m
JetBlue
Thu 14/512:00
SJU
-
DUB
1 stop16h 00m
JetBlue
Deal found 9/2£403
Wed 6/510:40
DUB
-
SJU
1 stop16h 32m
JetBlue
Thu 14/512:00
SJU
-
DUB
1 stop16h 00m
JetBlue
Deal found 9/2£403
Thu 7/511:40
DUB
-
SJU
1 stop19h 27m
JetBlue
Mon 18/515:00
SJU
-
DUB
1 stop13h 00m
JetBlue
Deal found 9/2£417
Wed 6/510:40
DUB
-
SJU
1 stop16h 32m
JetBlue
Mon 18/512:00
SJU
-
DUB
1 stop16h 00m
JetBlue
Deal found 9/2£418
Thu 7/511:40
DUB
-
SJU
1 stop17h 27m
JetBlue
Sat 16/512:00
SJU
-
DUB
1 stop16h 00m
JetBlue
Deal found 9/2£420
Wed 6/510:40
DUB
-
SJU
1 stop16h 32m
JetBlue
Sat 16/512:00
SJU
-
DUB
1 stop16h 00m
JetBlue
Deal found 9/2£421
Mon 4/509:30
DUB
-
SJU
1 stop18h 32m
Finnair
Mon 11/506:45
SJU
-
DUB
1 stop22h 00m
Finnair
Deal found 11/2£430
Sat 9/510:40
DUB
-
SJU
1 stop16h 21m
JetBlue
Sun 17/523:25
SJU
-
DUB
1 stop27h 55m
JetBlue
Deal found 9/2£439
Thu 7/511:40
DUB
-
SJU
1 stop17h 27m
JetBlue
Fri 15/513:00
SJU
-
DUB
1 stop14h 20m
JetBlue
Deal found 9/2£441
Wed 6/510:40
DUB
-
SJU
1 stop16h 32m
JetBlue
Fri 15/513:00
SJU
-
DUB
1 stop14h 20m
JetBlue
Deal found 9/2£443
Thu 30/409:30
DUB
-
SJU
1 stop18h 32m
Finnair
Sat 9/506:45
SJU
-
DUB
2 stops24h 05m
Finnair
Deal found 11/2£469

Find flight deals from Ireland to San Juan

Keep the following information in mind while searching for Ireland to San Juan flight deals. Data was last updated 12 February 2026.

Round-trip from

£397

One-way from

£321

Popular in

December

Cheapest in

June

Average price

£747
JetBlue
  • JetBlue
  • 11/5-14/5
  • 2 total stops
  • 27h 21m total
  • Ireland to San Juan
Search Deals
17/4
  • 17/4
  • 3 total stops
  • 44h 16m total
  • Ireland to San Juan
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£33 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to San Juan 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, Cheapflights users made 858,174 searches. Data last updated 12 February 2026.
Use the filters below to find and compare flights from Ireland to San Juan that are best for you.

Fly from

Ireland

Fly to

San Juan

Route

Depart

Return

Price

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Mon 11/5

11:40-21:01

1 stop14h 21m

San Juan Luis Munoz Marin Intl

Thu 14/5

15:00-09:00

1 stop13h 00m

£397

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sat 9/5

11:40-21:01

1 stop14h 21m

San Juan Luis Munoz Marin Intl

Thu 14/5

15:00-09:00

1 stop13h 00m

£403

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Fri 8/5

11:40-02:07

1 stop19h 27m

San Juan Luis Munoz Marin Intl

Thu 14/5

15:00-09:00

1 stop13h 00m

£403

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sun 10/5

11:40-02:07

1 stop19h 27m

San Juan Luis Munoz Marin Intl

Thu 14/5

12:00-09:00

1 stop16h 00m

£403

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 7/5

11:40-02:07

1 stop19h 27m

San Juan Luis Munoz Marin Intl

Mon 18/5

15:00-09:00

1 stop13h 00m

£417

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 7/5

11:40-00:07

1 stop17h 27m

San Juan Luis Munoz Marin Intl

Sat 16/5

12:00-09:00

1 stop16h 00m

£420

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Mon 11/5

11:40-00:07

1 stop17h 27m

San Juan Luis Munoz Marin Intl

Sat 16/5

12:00-09:00

1 stop16h 00m

£420

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Tue 12/5

10:40-22:12

1 stop16h 32m

San Juan Luis Munoz Marin Intl

Sat 16/5

12:00-09:00

1 stop16h 00m

£420

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 7/5

11:40-00:07

1 stop17h 27m

San Juan Luis Munoz Marin Intl

Fri 15/5

13:00-08:20

1 stop14h 20m

£441

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Tue 12/5

11:40-21:01

1 stop14h 21m

San Juan Luis Munoz Marin Intl

Fri 15/5

13:00-08:20

1 stop14h 20m

£441

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 19 results
1
2

Best time to book a flight from Ireland to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Ireland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to San Juan

What is the cheapest month to book a flight from Ireland to San Juan?

Currently, May is the cheapest month in which you can book a flight from Ireland to San Juan (average of £427). Flying from Ireland to San Juan in February is currently the most expensive (average of £597). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ireland to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ireland to San Juan?

    Departing from Ireland to San Juan will take you 14h 21m. Airlines will cover a distance of 3963 mi.

  • Can I find deals for flights from Ireland to San Juan that include hotel bookings?

    Yes. In addition to deals on Ireland to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to San Juan.

  • Can I find deals for business class flights from Ireland to San Juan?

    Yes. Cheapflights offers flight deals from Ireland to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to San Juan?

    Currently, May is the cheapest month in which you can book a flight from Ireland to San Juan (average of £427). Flying from Ireland to San Juan in February is currently the most expensive (average of £597). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to San Juan?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ireland to San Juan. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ireland to San Juan?

Cheapflights simply makes it quick and affordable to book flights from Ireland to San Juan by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ireland to San Juan with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ireland to San Juan flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ireland to San Juan become cheaper?

Yes, Cheapflights offers price alerts on Ireland to San Juan flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.