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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £338

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
16 Apr — 23 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Luis Munoz Marin Intl

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Luis Munoz Marin Intl
Explore the most affordable flight options available from Heathrow to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 March 2026.

Mon 13/408:40
LHR
-
SJU
1 stop18h 28m
JetBlue
Mon 27/419:58
SJU
-
LHR
1 stop19h 47m
JetBlue
Deal found 12/3£540
Mon 5/1008:15
LHR
-
SJU
1 stop13h 35m
JetBlue
Sun 11/1019:55
SJU
-
LHR
1 stop29h 35m
JetBlue
Deal found 14/3£562
Tue 14/408:40
LHR
-
SJU
1 stop18h 32m
JetBlue
Tue 21/419:58
SJU
-
LHR
1 stop19h 47m
JetBlue
Deal found 15/3£563
Mon 13/408:15
LHR
-
SJU
1 stop20h 52m
JetBlue
Mon 20/405:01
SJU
-
LHR
1 stop20h 29m
JetBlue
Deal found 14/3£565
Mon 27/408:15
LHR
-
SJU
1 stop17h 45m
JetBlue
Mon 4/521:59
SJU
-
LHR
1 stop30h 31m
JetBlue
Deal found 13/3£569
Fri 11/908:15
LHR
-
SJU
1 stop13h 35m
JetBlue
Wed 23/913:25
SJU
-
LHR
1 stop15h 05m
JetBlue
Deal found 12/3£574
Wed 29/408:15
LHR
-
SJU
1 stop17h 45m
JetBlue
Wed 6/519:15
SJU
-
LHR
1 stop20h 30m
JetBlue
Deal found 15/3£577
Thu 24/911:55
LHR
-
SJU
1 stop14h 29m
JetBlue
Tue 29/914:25
SJU
-
LHR
1 stop14h 05m
JetBlue
Deal found 16/3£578
Mon 27/411:55
LHR
-
SJU
1 stop14h 05m
JetBlue
Wed 6/515:00
SJU
-
LHR
1 stop13h 30m
JetBlue
Deal found 14/3£580
Wed 9/908:15
LHR
-
SJU
1 stop13h 35m
JetBlue
Wed 23/914:25
SJU
-
LHR
1 stop14h 05m
JetBlue
Deal found 16/3£582
Mon 11/511:55
LHR
-
SJU
1 stop17h 12m
JetBlue
Sun 17/523:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 13/3£583
Mon 13/408:15
LHR
-
SJU
1 stop13h 40m
JetBlue
Wed 29/414:35
SJU
-
LHR
1 stop13h 55m
JetBlue
Deal found 13/3£589

Find flight deals from Heathrow to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 March 2026.

Round-trip from

£540

One-way from

£338

Popular in

December

Cheapest in

September

Average price

£624
JetBlue
  • JetBlue
  • 13/4-27/4
  • 2 total stops
  • 38h 15m total
  • London to San Juan
Search Deals
22/4
  • 22/4
  • 3 total stops
  • 24h 55m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£52 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Luis Munoz Marin Intl 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 17 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 1/9

08:15-19:47

1 stop16h 32m

San Juan Luis Munoz Marin Intl

Sat 12/9

13:25-09:30

1 stop15h 05m

£669

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 3/4

08:40-22:08

1 stop18h 28m

San Juan Luis Munoz Marin Intl

Tue 21/4

19:58-20:45

1 stop19h 47m

£705

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 10/6

08:00-00:35

2 stops21h 35m

San Juan Luis Munoz Marin Intl

Tue 8/9

06:00-12:45

2 stops25h 45m

£717

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 1/9

08:00-02:20

2 stops23h 20m

San Juan Luis Munoz Marin Intl

Sat 12/9

13:25-15:35

2 stops21h 10m

£793

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 23/4

13:05-02:07

2 stops18h 02m

San Juan Luis Munoz Marin Intl

Wed 29/4

10:00-20:20

2 stops29h 20m

£848

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 17/8

06:00-01:28

2 stops24h 28m

San Juan Luis Munoz Marin Intl

Fri 28/8

06:00-10:20

2 stops23h 20m

£848

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 22/4

11:20-02:39

2 stops20h 19m

San Juan Luis Munoz Marin Intl

Mon 27/4

05:30-10:20

2 stops23h 50m

£866

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 18/4

22:05-00:58

2 stops31h 53m

San Juan Luis Munoz Marin Intl

Sun 26/4

14:45-11:20

1 stop15h 35m

£876

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 31/3

06:00-01:34

2 stops24h 34m

San Juan Luis Munoz Marin Intl

Tue 7/4

05:01-10:20

2 stops24h 19m

£909

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 6/4

11:55-03:10

1 stop20h 15m

San Juan Luis Munoz Marin Intl

Sun 19/4

19:58-20:45

1 stop19h 47m

£927

Flights are sorted by cheapest return flights first.

Deals found on 12/3

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Heathrow 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport

How far ahead should I book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the optimal time to book a return flight from Heathrow to Luis Munoz Marin Intl. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Currently, July is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (average of £357). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of £544). 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.

How much does it cost for a return flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated 17 March 2026.
See what other customers who have flown with Finnair,JetBlue, andIcelandair from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Finnair
7.6
Good
1,371 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
JetBlue
7.2
Good
2,905 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Icelandair
7.1
Good
622 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Iberia
7.0
Good
3,137 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
British Airways
6.7
Okay
7,797 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Boarding

7.7

Crew

8.2

Food

6.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Luis Munoz Marin Intl. 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

    For as low as £673, JetBlue can have you in San Juan Luis Munoz Marin Intl Airport from London Heathrow Airport in 16h 32m. Airlines will cover a distance of 4179 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport round-trip?

    According to our current data, Virgin Atlantic (£336), JetBlue (£411), and Finnair (£494) offers the cheapest pricing from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport. You may be able to fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport for 50% less than the average price by searching for these airlines.

  • Can I find deals for flights from Heathrow to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Heathrow to Luis Munoz Marin Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Heathrow to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Heathrow to Luis Munoz Marin Intl 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

    Currently, July is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (average of £357). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of £544). 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

Travelling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Bayamón

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Alternative routes for Heathrow to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Luis Munoz Marin Intl flights
Stansted to Luis Munoz Marin Intl flights
London City to Luis Munoz Marin Intl flights

Top 6 airlines flying from Heathrow to Luis Munoz Marin Intl

Discover the top 6 airlines that operate flights from Heathrow to Luis Munoz Marin Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£336Average£1,048FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£411Average£618FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£494Average£676FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£510Average£656FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£588Average£923FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£612Average£1,006FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Luis Munoz Marin Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Luis Munoz Marin Intl. 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 Heathrow to Luis Munoz Marin Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Luis Munoz Marin Intl from Heathrow.

Can Cheapflights find flights from Heathrow to Luis Munoz Marin Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Luis Munoz Marin Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Luis Munoz Marin Intl become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Luis Munoz Marin Intl 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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