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Flights to San Juan

£312 Cheap flights to San Juan

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to San Juan departing on 4/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from the United Kingdom to San Juan

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:00 - 01:50
LGW
-
SJU
16h 50m
1 stop
Multiple Airlines Logo
06:15 - 10:00
SJU
-
LGW
22h 45m
2 stops
£504Multiple Airlines
Mon, 5 Oct - Wed, 14 Oct
Multiple Airlines Logo
14:00 - 01:50
LGW
-
SJU
16h 50m
1 stop
Multiple Airlines Logo
21:49 - 10:00
SJU
-
LGW
31h 11m
1 stop
£510Multiple Airlines
Mon, 5 Oct - Sun, 11 Oct
Multiple Airlines Logo
14:00 - 01:50
LGW
-
SJU
16h 50m
1 stop
Multiple Airlines Logo
21:49 - 10:00
SJU
-
LGW
31h 11m
1 stop
£511Multiple Airlines
Mon, 5 Oct - Wed, 14 Oct
JetBlue Logo
07:25 - 03:48
LHR
-
SJU
24h 23m
1 stop
JetBlue Logo
07:10 - 06:55
SJU
-
LHR
19h 45m
1 stop
£582JetBlue
Thu, 3 Dec - Sun, 13 Dec
JetBlue Logo
09:20 - 00:25
LHR
-
SJU
19h 05m
1 stop
JetBlue Logo
05:30 - 21:40
SJU
-
LHR
12h 10m
1 stop
£589JetBlue
Wed, 11 Nov - Tue, 24 Nov
JetBlue Logo
09:20 - 00:25
LHR
-
SJU
19h 05m
1 stop
JetBlue Logo
05:30 - 21:40
SJU
-
LHR
12h 10m
1 stop
£590JetBlue
Wed, 11 Nov - Tue, 24 Nov
Icelandair Logo
14:20 - 14:14
GLA
-
SJU
28h 54m
2 stops
Icelandair Logo
17:23 - 13:25
SJU
-
GLA
39h 02m
2 stops
£923Icelandair
Fri, 4 Sep - Tue, 8 Sep
Icelandair Logo
14:20 - 13:11
GLA
-
SJU
27h 51m
2 stops
Icelandair Logo
13:50 - 13:25
SJU
-
GLA
18h 35m
2 stops
£924Icelandair
Fri, 4 Sep - Tue, 8 Sep
Aer Lingus Logo
19:25 - 16:40
LCY
-
SJU
25h 15m
2 stops
Aer Lingus Logo
18:10 - 17:30
SJU
-
LCY
19h 20m
2 stops
£1,004Aer Lingus
Mon, 2 Nov - Sun, 15 Nov
Virgin Atlantic Logo
09:20 - 23:55
LCY
-
SJU
18h 35m
2 stops
Virgin Atlantic Logo
07:15 - 07:15
SJU
-
LCY
20h 00m
2 stops
£1,087Virgin Atlantic
Fri, 13 Nov - Sun, 22 Nov

momondo Fare Finder

 
Locate flights to San Juan that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 279,928 searches and data was last updated on 1 July 2026.
Use the filters below to find and compare flights to San Juan that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 5/10

14:00-01:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Wed 14/10

06:15-10:00

2 stops22h 45m

£504

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 5/10

14:00-01:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Sun 11/10

21:49-10:00

1 stop31h 11m

£510

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 5/10

14:00-01:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Wed 14/10

21:49-10:00

1 stop31h 11m

£511

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 3/12

07:25-03:48

1 stop24h 23m

San Juan Luis Munoz Marin Intl

Sun 13/12

07:10-06:55

1 stop19h 45m

£582
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 11/11

09:20-00:25

1 stop19h 05m

San Juan Luis Munoz Marin Intl

Tue 24/11

05:30-21:40

1 stop12h 10m

£589

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 11/11

09:20-00:25

1 stop19h 05m

San Juan Luis Munoz Marin Intl

Tue 24/11

05:30-21:40

1 stop12h 10m

£590

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Fri 4/9

14:20-14:14

2 stops28h 54m

San Juan Luis Munoz Marin Intl

Tue 8/9

17:23-13:25

2 stops39h 02m

£923

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Fri 4/9

14:20-13:11

2 stops27h 51m

San Juan Luis Munoz Marin Intl

Tue 8/9

13:50-13:25

2 stops18h 35m

£924

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 2/11

19:25-16:40

2 stops25h 15m

San Juan Luis Munoz Marin Intl

Sun 15/11

18:10-17:30

2 stops19h 20m

£1,004

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 13/11

09:20-23:55

2 stops18h 35m

San Juan Luis Munoz Marin Intl

Sun 22/11

07:15-07:15

2 stops20h 00m

£1,087

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

San Juan flights insights and trends

Explore insights for your San Juan flight to craft the best travel plan

What is the cheapest month to fly to San Juan?

The cheapest month to fly to San Juan from United Kingdom is in February. Flight prices, which tend to average around £546, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to San Juan from United Kingdom during September instead. Flights to San Juan in September, while not as cheap as those in February, still average around £575.

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around £704 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from United Kingdom for as low as £610 on momondo.

Cheapest flights to San Juan

Find the cheapest flights to San Juan from your nearest city or airport
Find flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport
CHEAPEST MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTSeptember20% cheaperFlying from London Heathrow Airport to San Juan costs on average just £568 in September
MOST EXPENSIVE MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember42% more expensiveIt costs about £1,003 for flights to San Juan from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember337% more users visitedMore momondo users searched in flights to San Juan from London Heathrow Airport in December than any other month

Cheap San Juan flight deals and tips

Summary info about San Juan flight prices, duration and airlines

Best One-Way Price

£312

Best Round-Trip Price

£504

Fastest flight time

20h 40m

Popular in

June
The best one-way flight price to San Juan from United Kingdom in the last 5 days is £312 (London Gatwick to San Juan Luis Munoz Marin Intl).
Search Deals
The best round-trip flight price to San Juan from United Kingdom in the last 5 days is £504 (London Gatwick to San Juan Luis Munoz Marin Intl).
Search Deals
The fastest flight to San Juan from United Kingdom takes 20h 40m (London Gatwick to San Juan Luis Munoz Marin Intl).
Search Deals
June has the highest demand for flights to San Juan, with a 14% price increase on average.
Search Deals

Frequently asked questions about flying to San Juan

When is the best time to plan a beach trip to San Juan?

The month of January, February, or March is often the best time to visit San Juan to go to the beach due to the weather. Condado Beach is the most often visited beach in the area.

How far in advance should I book a flight to San Juan?

We recommend purchasing flights from United Kingdom to San Juan 45 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to San Juan for £695. Don’t hesitate to check prices now though, because momondo users recently found tickets for as low as £370.

Is there an alternative airport near San Juan?

Finding an alternative and possibly cheaper destination airport near San Juan is possible. If you are planning a flight to San Juan, consider booking flights to San Juan Isla Grande Airport (1 mi from San Juan city centre), Ceiba J. Aponte de la Torre Airport (34 mi from San Juan city centre), Ponce Mercedita Airport (43 mi from San Juan city centre), Vieques Airport (46 mi from San Juan city centre) or Culebra Airport (54 mi from San Juan city centre).

Is there a cheaper alternative to flying into San Juan?

Culebra Airport has an average price of £67 per person and is typically the cheapest airport to fly into when visiting San Juan. This average price does vary based on departure city. Try momondo’s Airport-to-Airport Pricing Tool to find the cheapest flight.

Are there flights to San Juan Antiguo?

Yes, if you fly to San Juan Luis Munoz Marin Intl in San Juan which is the closest available airport to San Juan Antiguo (7.8 mi away).

What’s the closest airport to Cruise Line Terminal?

The closest airport to Cruise Line Terminal is 7.2 mi away - San Juan’s San Juan Luis Munoz Marin Intl airport.

When did momondo last update prices for flights to San Juan?

Prices for flights to San Juan refresh daily.

How many operators does momondo search for flights to San Juan?

The number of operators available for flights to San Juan is 12 as of July 2026.

How old do you have to be to fly to San Juan?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to San Juan.

What documentation or ID do you need to fly to San Juan?

The travel and health documents required for your trip to San Juan can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal to San Juan?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to San Juan. momondo saves you time and could save you money on your trip.

Can I find flights to San Juan with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to San Juan?

momondo provides multiple filters to help you find the best flight to San Juan. Filter by price, airline, airport, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight to San Juan right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to San Juan

Popular Flights to San Juan

Popular routes according to searches in the past day on momondo
London to San Juan Flightsfrom £667
Manchester to San Juan Flightsfrom £1,006
Birmingham to San Juan Flightsfrom £1,013
Edinburgh Turnhouse to San Juan Flightsfrom £850
Glasgow to San Juan Flightsfrom £1,224
Norwich Arpt to San Juan Flightsfrom £1,686
Newcastle upon Tyne to San Juan Flightsfrom £1,503