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Flights to San Juan

£277 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 26/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
JetBlue Logo
12:20 - 02:54
LHR
-
SJU
18h 34m
1 stop
JetBlue Logo
05:01 - 21:40
SJU
-
LHR
12h 39m
1 stop
£403JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
09:20 - 00:58
LHR
-
SJU
19h 38m
1 stop
JetBlue Logo
14:25 - 09:30
SJU
-
LHR
15h 05m
1 stop
£411JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
07:25 - 22:31
LHR
-
SJU
19h 06m
1 stop
JetBlue Logo
11:10 - 06:55
SJU
-
LHR
15h 45m
1 stop
£413JetBlue
Tue, 24 Feb - Wed, 11 Mar
JetBlue Logo
12:20 - 11:58
LHR
-
SJU
27h 38m
1 stop
JetBlue Logo
05:01 - 21:40
SJU
-
LHR
12h 39m
1 stop
£414JetBlue
Mon, 9 Mar - Tue, 17 Mar
JetBlue Logo
09:20 - 22:53
LHR
-
SJU
17h 33m
1 stop
JetBlue Logo
12:15 - 06:55
SJU
-
LHR
14h 40m
1 stop
£415JetBlue
Wed, 18 Feb - Wed, 25 Feb
Icelandair Logo
12:35 - 02:27
GLA
-
SJU
17h 52m
2 stops
Icelandair Logo
05:10 - 09:55
SJU
-
GLA
24h 45m
2 stops
£897Icelandair
Thu, 12 Mar - Thu, 19 Mar
Aer Lingus Logo
09:00 - 16:35
NCL
-
SJU
35h 35m
2 stops
Aer Lingus Logo
21:25 - 08:30
SJU
-
NCL
31h 05m
2 stops
£918Aer Lingus
Sat, 28 Feb - Sat, 7 Mar
British Airways Logo
06:25 - 21:21
GLA
-
SJU
19h 56m
2 stops
British Airways Logo
11:45 - 09:50
SJU
-
GLA
17h 05m
2 stops
£1,164British Airways
Wed, 10 Jun - Sun, 14 Jun
United Airlines Logo
08:45 - 14:40
BHX
-
SJU
33h 55m
2 stops
United Airlines Logo
07:05 - 12:45
SJU
-
BHX
25h 40m
2 stops
£1,296United Airlines
Mon, 16 Mar - Mon, 23 Mar
United Airlines Logo
06:00 - 23:36
BHX
-
SJU
21h 36m
2 stops
United Airlines Logo
13:10 - 12:35
SJU
-
BHX
19h 25m
2 stops
£1,577United Airlines
Mon, 16 Mar - Thu, 19 Mar

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 February 2026.
Use the filters below to find and compare flights to San Juan that are best for you.

Fly from

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-02:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:01-21:40

1 stop12h 39m

£403

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

09:20-00:58

1 stop19h 38m

San Juan Luis Munoz Marin Intl

Wed 11/3

14:25-09:30

1 stop15h 05m

£411

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

07:25-22:31

1 stop19h 06m

San Juan Luis Munoz Marin Intl

Wed 11/3

11:10-06:55

1 stop15h 45m

£413

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

12:20-11:58

1 stop27h 38m

San Juan Luis Munoz Marin Intl

Tue 17/3

05:01-21:40

1 stop12h 39m

£414

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 18/2

09:20-22:53

1 stop17h 33m

San Juan Luis Munoz Marin Intl

Wed 25/2

12:15-06:55

1 stop14h 40m

£415

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Thu 12/3

12:35-02:27

2 stops17h 52m

San Juan Luis Munoz Marin Intl

Thu 19/3

05:10-09:55

2 stops24h 45m

£897

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Sat 28/2

09:00-16:35

2 stops35h 35m

San Juan Luis Munoz Marin Intl

Sat 7/3

21:25-08:30

2 stops31h 05m

£918

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Wed 10/6

06:25-21:21

2 stops19h 56m

San Juan Luis Munoz Marin Intl

Sun 14/6

11:45-09:50

2 stops17h 05m

£1,164

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Mon 16/3

08:45-14:40

2 stops33h 55m

San Juan Luis Munoz Marin Intl

Mon 23/3

07:05-12:45

2 stops25h 40m

£1,296

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Mon 16/3

06:00-23:36

2 stops21h 36m

San Juan Luis Munoz Marin Intl

Thu 19/3

13:10-12:35

2 stops19h 25m

£1,577

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 September. Flight prices, which tend to average around £527, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to San Juan from United Kingdom during February instead. Flights to San Juan in February, while not as cheap as those in September, still average around £537.

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 £639 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 £512 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 Saint Thomas Island
CHEAPEST MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTSeptember16% cheaperFlying from London Heathrow Airport to San Juan costs on average just £539 in September
MOST EXPENSIVE MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember49% more expensiveIt costs about £954 for flights to San Juan from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember435% 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

£277

Best Round-Trip Price

£403

Fastest flight time

16h 53m
The best one-way flight price to San Juan from United Kingdom in the last 72 hours is £277 (London Gatwick to San Juan Luis Munoz Marin Intl).
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The best round-trip flight price to San Juan from United Kingdom in the last 72 hours is £403 (London Heathrow to San Juan Luis Munoz Marin Intl).
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The fastest flight to San Juan from United Kingdom takes 16h 53m (London Gatwick to San Juan Luis Munoz Marin Intl).
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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. Another popular beach in the area is Isla Verde Beach.

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

We recommend purchasing flights from United Kingdom to San Juan 47 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 £658. Don’t hesitate to check prices now though, because momondo users recently found tickets for as low as £390.

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 £65 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 14 as of February 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 £526
Manchester to San Juan Flightsfrom £808
Birmingham to San Juan Flightsfrom £1,775
Newcastle upon Tyne to San Juan Flightsfrom £1,292
Glasgow to San Juan Flightsfrom £790
Edinburgh Turnhouse to San Juan Flightsfrom £930
Norwich Arpt to San Juan Flightsfrom £1,445