£307+ Cheap flights to San Juan

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.
— SJU
16 May — 23 May1
1 adult
1 adult, Economy, 0 bags

Flights to San Juan in 2026

Enter your travel dates to find the best prices.

Cheapest flights to San Juan
Explore the most affordable flight options available to San Juan. Find the lowest fares based on data from user searches, with prices last updated on 16 April 2026.

Wed 6/511:55
LHR
-
SJU
1 stop17h 15m
JetBlue
Sun 10/517:54
SJU
-
LHR
1 stop21h 51m
JetBlue
Deal found 15/4£574
Fri 2/1011:55
LHR
-
SJU
1 stop15h 47m
JetBlue
Sun 11/1006:12
SJU
-
LHR
1 stop19h 18m
JetBlue
Deal found 13/4£574
Mon 2/1107:25
LHR
-
SJU
1 stop22h 18m
JetBlue
Sun 15/1107:00
SJU
-
LHR
1 stop19h 55m
JetBlue
Deal found 11/4£576
Tue 3/1109:20
LHR
-
SJU
1 stop19h 05m
JetBlue
Sat 7/1107:00
SJU
-
LHR
1 stop19h 55m
JetBlue
Deal found 14/4£576
Wed 6/508:15
LHR
-
SJU
1 stop15h 21m
JetBlue
Mon 11/506:18
SJU
-
LHR
1 stop33h 27m
JetBlue
Deal found 15/4£580
Fri 1/508:40
LHR
-
SJU
1 stop18h 02m
JetBlue
Wed 6/508:00
SJU
-
LHR
1 stop17h 30m
JetBlue
Deal found 12/4£581
Wed 11/1112:20
LHR
-
SJU
1 stop17h 23m
JetBlue
Wed 25/1106:05
SJU
-
LHR
1 stop20h 50m
JetBlue
Deal found 16/4£582
Mon 11/508:15
LHR
-
SJU
1 stop17h 49m
JetBlue
Mon 18/522:05
SJU
-
LHR
1 stop17h 40m
JetBlue
Deal found 13/4£583
Sat 23/512:20
LGW
-
SJU
1 stop14h 22m
JetBlue
Wed 27/507:20
SJU
-
LGW
1 stop21h 15m
JetBlue
Deal found 14/4£604
Wed 6/511:55
LHR
-
SJU
1 stop14h 09m
Multiple Airlines
Sun 17/513:16
SJU
-
LHR
1 stop12h 29m
Multiple Airlines
Deal found 13/4£607
Fri 22/512:20
LGW
-
SJU
1 stop16h 59m
JetBlue
Sun 31/505:01
SJU
-
LGW
1 stop23h 34m
JetBlue
Deal found 12/4£610
Thu 30/408:40
LHR
-
SJU
1 stop22h 59m
JetBlue
Sat 9/506:18
SJU
-
LHR
1 stop22h 12m
JetBlue
Deal found 12/4£610

Find flight deals to San Juan

Find the latest flights to San Juan in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 16 April 2026.

Return from

£574

One-way from

£307

Popular in

July

Cheapest in

February

Average price

£747
JetBlue
  • JetBlue
  • 6/5-10/5
  • 2 total stops
  • 39h 06m total
  • London to San Juan
6/5
  • 6/5
  • 3 total stops
  • 47h 20m total
  • London to San Juan
Highest demand for flights based on searches. 11% potential increase in price (£91 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£30 potential savings vs. average return price).
Average for return flights in April 2026

Cheapflights Fare Finder

 
Locate flights to San Juan that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 16 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

Sat 9/5

11:55-21:04

1 stop14h 09m

San Juan Luis Munoz Marin Intl

Wed 13/5

14:35-09:30

1 stop13h 55m

£662
Fastest return journey

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 2/6

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Sun 14/6

16:57-09:35

1 stop11h 38m

£672

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 31/5

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Sun 14/6

16:57-09:35

1 stop11h 38m

£672

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 1/9

08:15-19:50

1 stop16h 35m

San Juan Luis Munoz Marin Intl

Sat 12/9

10:30-09:30

1 stop18h 00m

£712

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 28/5

14:00-18:59

2 stops33h 59m

San Juan Luis Munoz Marin Intl

Thu 4/6

18:35-23:05

2 stops23h 30m

£717

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 26/4

14:00-23:43

2 stops38h 43m

San Juan Luis Munoz Marin Intl

Thu 30/4

20:40-23:05

1 stop21h 25m

£725

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 30/5

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Wed 17/6

16:55-09:35

1 stop11h 40m

£759

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Tue 26/5

09:10-14:34

2 stops34h 24m

San Juan Luis Munoz Marin Intl

Wed 10/6

18:35-20:20

2 stops20h 45m

£770

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 9/10

10:35-13:08

2 stops31h 33m

San Juan Luis Munoz Marin Intl

Mon 19/10

06:12-15:35

2 stops28h 23m

£796

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 6/6

08:45-14:30

2 stops34h 45m

San Juan Luis Munoz Marin Intl

Mon 15/6

16:40-18:30

2 stops20h 50m

£809

Flights are sorted by cheapest return flights first.

Deals found on 12/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan 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 to San Juan

When is the best time to book a flight to San Juan?

Use this chart to determine the optimal time to book a return flight from London to San Juan. Price data was last updated on 10 April 2026.

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

How long is the flight to San Juan?

On average, a flight from London to San Juan takes 18 hours 22 minutes. Flights to San Juan from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

What are the cheapest airlines that fly to San Juan?

The cheapest airlines flying from London to San Juan are Virgin Atlantic, JetBlue and Finnair.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan when rainfall is around 55.0 mm.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated 16 April 2026.
Get a feel of what it's like to fly with JetBlue,Icelandair, andIberia to Puerto Rico by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Boarding

7.3

Crew

7.9

Entertainment

7.2

Comfort

7.5

Food

6.6

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

FAQs about flying to San Juan

San Juan climate

The climate is tropical with summer temperatures in the 18-35 degree range. Thunderstorms are likely between April and November and hurricane season runs June to November. Further inland, temperatures drop a couple of degrees.

Getting around San Juan

Buses run in some, but not all areas of the city. There are taxis, but you’ll have to negotiate a price with the driver based on your destination. Rental cars are available as well, but make sure you have your ID handy. Some streets are not as well marked as others.

Local Airport

Luis Munoz Marin International Airport (SJU) is located 9 miles (14 km) east of San Juan.

What is good to know if travelling to San Juan?

  • One venue for Puerto Rico’s Latino chic is surprising — the Museo de Arte. Some Puerto Ricans come to the art museum at least once a week, and not just for its fine collection of Puerto Rican art. They also come for productions in the 400-seat theatre. And trendy locals can be seen strolling the museum’s lovely five-acre garden. 
  • San Juan has done a great job of adapting old buildings to new uses. La Princesa, for centuries one of the most feared prisons in the Caribbean, now houses the Puerto Rico Tourism Company. It features an exhibit of art by Puerto Ricans, which is free to the public.
  • Another example of reuse is the 19th-century insane asylum, the Antiguo Manicomio Insular, which is now the home of the Puerto Rican Academy of Fine Arts, with its lovely courtyard fountains surrounded by elegant iron fences.
  • Can I find cheaper flights to San Juan if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to San Juan on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to San Juan?

    Based on reviews from Cheapflights users, Virgin Atlantic is rated the highest out of the airlines that fly to San Juan.

  • How much is a return flight to San Juan?

    A return flight to San Juan will typically cost around £201, however they can be found for as little as £180.

  • Where does the fastest flight to San Juan depart from?

    For those looking to save time traveling to San Juan, London offers the quickest one-way flight (14 hours 12 minutes).

  • Does San Juan Luis Munoz Marin Intl have car hire?

    Yes. Those touching down at San Juan Luis Munoz Marin Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to San Juan Luis Munoz Marin Intl?

    Yes. San Juan Luis Munoz Marin Intl has hotels nearby for those requiring accommodations. San Juan Airport Hotel is the closest property to San Juan Luis Munoz Marin Intl (0.0 mi away from San Juan Luis Munoz Marin Intl).

See more FAQs

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Airports serving San Juan

Book a flight to or from one of these San Juan airports.

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How does Cheapflights help users find flights to San Juan?

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights to San Juan.

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Yes! Cheapflights helps users easily find flights to San Juan with no change fees.

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