Latest deals
Insights
When to book
FAQs
Price Alerts
Flights to San Juan

£338 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 15/5. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
15:34 - 09:30
SJU
-
LHR
12h 56m
1 stop
£582JetBlue
Tue, 2 Jun - Sat, 13 Jun
JetBlue Logo
12:20 - 21:32
LGW
-
SJU
14h 12m
1 stop
JetBlue Logo
16:55 - 09:35
SJU
-
LGW
11h 40m
1 stop
£583JetBlue
Wed, 2 Sep - Mon, 7 Sep
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
13:12 - 09:30
SJU
-
LHR
15h 18m
1 stop
£587JetBlue
Wed, 3 Jun - Sun, 14 Jun
Aer Lingus Logo
20:25 - 19:05
BHX
-
SJU
27h 40m
2 stops
Aer Lingus Logo
07:20 - 07:40
SJU
-
BHX
19h 20m
2 stops
£994Aer Lingus
Wed, 20 May - Wed, 27 May
Aer Lingus Logo
14:25 - 02:41
MAN
-
SJU
17h 16m
2 stops
Aer Lingus Logo
05:01 - 07:40
SJU
-
MAN
21h 39m
2 stops
£1,017Aer Lingus
Mon, 11 May - Mon, 18 May
Icelandair Logo
14:20 - 13:34
GLA
-
SJU
28h 14m
2 stops
Icelandair Logo
06:00 - 13:25
SJU
-
GLA
26h 25m
2 stops
£1,088Icelandair
Thu, 1 Oct - Mon, 5 Oct
British Airways Logo
12:40 - 12:40
GLA
-
SJU
29h 00m
2 stops
British Airways Logo
17:50 - 16:10
SJU
-
GLA
17h 20m
2 stops
£1,099British Airways
Thu, 1 Oct - Mon, 5 Oct
British Airways Logo
09:50 - 18:50
LCY
-
SJU
14h 00m
1 stop
British Airways Logo
20:35 - 15:15
SJU
-
LCY
13h 40m
1 stop
£1,184British Airways
Thu, 18 Jun - Sun, 21 Jun
Iberia Logo
09:35 - 18:50
LCY
-
SJU
14h 15m
1 stop
Iberia Logo
20:25 - 15:15
SJU
-
LCY
13h 50m
1 stop
£1,202Iberia
Wed, 10 Jun - Tue, 8 Sep
Iberia Logo
09:50 - 18:50
LCY
-
SJU
14h 00m
1 stop
Iberia Logo
20:25 - 15:15
SJU
-
LCY
13h 50m
1 stop
£1,208Iberia
Thu, 15 Oct - Sun, 18 Oct

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 30 April 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

LHR - SJU

LHRSJU

London Heathrow

Tue 2/6

11:55-22:53

1 stop15h 58m

San Juan Luis Munoz Marin Intl

Sat 13/6

15:34-09:30

1 stop12h 56m

£582
Fastest return journey

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 2/9

12:20-21:32

1 stop14h 12m

San Juan Luis Munoz Marin Intl

Mon 7/9

16:55-09:35

1 stop11h 40m

£583

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/6

11:55-22:53

1 stop15h 58m

San Juan Luis Munoz Marin Intl

Sun 14/6

13:12-09:30

1 stop15h 18m

£587

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Wed 20/5

20:25-19:05

2 stops27h 40m

San Juan Luis Munoz Marin Intl

Wed 27/5

07:20-07:40

2 stops19h 20m

£994

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Mon 11/5

14:25-02:41

2 stops17h 16m

San Juan Luis Munoz Marin Intl

Mon 18/5

05:01-07:40

2 stops21h 39m

£1,017

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Thu 1/10

14:20-13:34

2 stops28h 14m

San Juan Luis Munoz Marin Intl

Mon 5/10

06:00-13:25

2 stops26h 25m

£1,088

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Thu 1/10

12:40-12:40

2 stops29h 00m

San Juan Luis Munoz Marin Intl

Mon 5/10

17:50-16:10

2 stops17h 20m

£1,099

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 18/6

09:50-18:50

1 stop14h 00m

San Juan Luis Munoz Marin Intl

Sun 21/6

20:35-15:15

1 stop13h 40m

£1,184

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 10/6

09:35-18:50

1 stop14h 15m

San Juan Luis Munoz Marin Intl

Tue 8/9

20:25-15:15

1 stop13h 50m

£1,202

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 15/10

09:50-18:50

1 stop14h 00m

San Juan Luis Munoz Marin Intl

Sun 18/10

20:25-15:15

1 stop13h 50m

£1,208

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 £549.

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 £657 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 £519 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 £557 in September
MOST EXPENSIVE MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember46% more expensiveIt costs about £963 for flights to San Juan from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO SAN JUAN FROM LONDON HEATHROW AIRPORTDecember496% 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

£338

Best Round-Trip Price

£582

Fastest flight time

31h 27m

Popular in

December
The best one-way flight price to San Juan from United Kingdom in the last 72 hours is £338 (London Stansted to San Juan Luis Munoz Marin Intl).
Search Deals
The best round-trip flight price to San Juan from United Kingdom in the last 72 hours is £582 (London Heathrow to San Juan Luis Munoz Marin Intl).
Search Deals
The fastest flight to San Juan from United Kingdom takes 31h 27m (London Heathrow to San Juan Luis Munoz Marin Intl).
Search Deals
December has the highest demand for flights to San Juan, with a 1% 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 £681. Don’t hesitate to check prices now though, because momondo users recently found tickets for as low as £363.

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 £66 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 13 as of April 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.

An easier way to manage your San Juan trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 30/5
Sat 6/6
By creating a price alert you accept our terms of use and privacy policy.

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 £743
Newcastle upon Tyne to San Juan Flightsfrom £1,458
Manchester to San Juan Flightsfrom £1,094
Edinburgh Turnhouse to San Juan Flightsfrom £922
Birmingham to San Juan Flightsfrom £1,553
Norwich Arpt to San Juan Flightsfrom £1,574
Glasgow to San Juan Flightsfrom £1,386