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Cheap flights from Ireland to San Juan from £345

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SJU
12 Feb — 19 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 13 January 2026.

Round-trip from

£514

One-way from

£345

Popular in

March

Cheapest in

May

Average price

£682
British Airways
  • British Airways
  • 17/2-24/2
  • 4 total stops
  • 35h 46m total
  • Ireland to San Juan
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JetBlue
  • JetBlue
  • 6/5
  • 1 total stop
  • 14h 21m total
  • Ireland to San Juan
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£83 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Find 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 13 January 2026.

Tue 17/207:35
DUB
-
SJU
2 stops17h 59m
British Airways
Tue 24/214:23
SJU
-
DUB
2 stops17h 47m
British Airways
Deal found 12/1£514
Sat 7/320:40
DUB
-
SJU
2 stops30h 18m
British Airways
Mon 23/313:30
SJU
-
DUB
2 stops23h 35m
British Airways
Deal found 11/1£523
Wed 28/110:45
DUB
-
SJU
2 stops31h 46m
Delta
Sun 1/207:00
SJU
-
DUB
2 stops21h 05m
Delta
Deal found 12/1£554
Wed 18/306:40
DUB
-
SJU
2 stops20h 18m
British Airways
Wed 25/313:30
SJU
-
DUB
1 stop15h 10m
British Airways
Deal found 12/1£585
Wed 18/310:45
DUB
-
SJU
1 stop17h 14m
Delta
Wed 25/307:30
SJU
-
DUB
1 stop20h 15m
Delta
Deal found 12/1£618
Tue 10/210:40
DUB
-
SJU
1 stop33h 00m
United Airlines
Tue 17/208:30
SJU
-
DUB
2 stops19h 00m
United Airlines
Deal found 12/1£682
Sat 7/311:30
DUB
-
SJU
1 stop17h 22m
Multiple Airlines
Mon 23/318:10
SJU
-
DUB
1 stop14h 10m
Multiple Airlines
Deal found 12/1£702
Sat 21/308:45
DUB
-
SJU
2 stops18h 13m
British Airways
Fri 27/318:01
SJU
-
DUB
2 stops16h 19m
British Airways
Deal found 12/1£790
Thu 2/708:50
DUB
-
SJU
2 stops20h 07m
United Airlines
Thu 16/707:00
SJU
-
DUB
2 stops19h 20m
United Airlines
Deal found 13/1£818

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 13 January 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

Tue 17/2

07:35-21:34

2 stops17h 59m

San Juan Luis Munoz Marin Intl

Tue 24/2

14:23-12:10

2 stops17h 47m

£514

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sat 7/3

20:40-22:58

2 stops30h 18m

San Juan Luis Munoz Marin Intl

Mon 23/3

13:30-17:05

2 stops23h 35m

£523

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Wed 28/1

10:45-14:31

2 stops31h 46m

San Juan Luis Munoz Marin Intl

Sun 1/2

07:00-08:05

2 stops21h 05m

£554

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Wed 18/3

06:40-22:58

2 stops20h 18m

San Juan Luis Munoz Marin Intl

Wed 25/3

13:30-08:40

1 stop15h 10m

£585

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Wed 18/3

10:45-23:59

1 stop17h 14m

San Juan Luis Munoz Marin Intl

Wed 25/3

07:30-07:45

1 stop20h 15m

£618

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Tue 10/2

10:40-15:40

1 stop33h 00m

San Juan Luis Munoz Marin Intl

Tue 17/2

08:30-07:30

2 stops19h 00m

£682

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sat 7/3

11:30-00:52

1 stop17h 22m

San Juan Luis Munoz Marin Intl

Mon 23/3

18:10-12:20

1 stop14h 10m

£702

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sat 21/3

08:45-22:58

2 stops18h 13m

San Juan Luis Munoz Marin Intl

Fri 27/3

18:01-14:20

2 stops16h 19m

£790

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Wed 6/5

11:40-00:07

1 stop17h 27m

£345

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Mon 30/3

09:30-22:31

1 stop18h 01m

£401

Flights are sorted by cheapest return flights first.

Deals found on 10/1

Showing 1-10 of 12 results
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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 £439). Flying from Ireland to San Juan in September is currently the most expensive (average of £803). 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 17h 59m. Airlines will cover a distance of 3963 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 £439). Flying from Ireland to San Juan in September is currently the most expensive (average of £803). 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

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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.

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