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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £357

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
31 Mar — 7 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 1 March 2026.

Wed 11/307:25
LHR
-
SJU
1 stop23h 29m
JetBlue
Wed 25/305:10
SJU
-
LHR
1 stop21h 45m
JetBlue
Deal found 25/2£399
Tue 17/307:25
LHR
-
SJU
1 stop17h 01m
JetBlue
Mon 23/301:30
SJU
-
LHR
1 stop25h 25m
JetBlue
Deal found 26/2£400
Thu 5/312:20
LHR
-
SJU
1 stop19h 30m
JetBlue
Wed 18/305:10
SJU
-
LHR
1 stop21h 45m
JetBlue
Deal found 25/2£435
Sun 15/307:45
LHR
-
SJU
1 stop22h 42m
JetBlue
Tue 31/305:01
SJU
-
LHR
1 stop20h 29m
JetBlue
Deal found 28/2£462
Wed 4/307:25
LHR
-
SJU
1 stop24h 26m
JetBlue
Wed 11/304:15
SJU
-
LHR
1 stop13h 25m
JetBlue
Deal found 25/2£491
Wed 9/908:15
LHR
-
SJU
1 stop18h 09m
JetBlue
Thu 24/914:25
SJU
-
LHR
1 stop14h 05m
JetBlue
Deal found 25/2£515
Mon 4/508:40
LHR
-
SJU
1 stop32h 20m
JetBlue
Sun 10/521:59
SJU
-
LHR
1 stop17h 46m
JetBlue
Deal found 27/2£528
Tue 12/508:15
LHR
-
SJU
1 stop20h 52m
JetBlue
Tue 19/521:59
SJU
-
LHR
1 stop17h 46m
JetBlue
Deal found 28/2£534
Mon 13/408:15
LHR
-
SJU
1 stop13h 40m
JetBlue
Mon 20/423:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 27/2£534
Thu 23/408:15
LHR
-
SJU
1 stop15h 16m
JetBlue
Sun 3/523:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 26/2£535
Wed 7/1011:55
LHR
-
SJU
1 stop14h 29m
JetBlue
Thu 15/1013:00
SJU
-
LHR
1 stop12h 30m
JetBlue
Deal found 26/2£547

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 1 March 2026.

Round-trip from

£399

One-way from

£357

Popular in

December

Cheapest in

September

Average price

£566
JetBlue
  • JetBlue
  • 11/3-25/3
  • 2 total stops
  • 45h 14m total
  • London to San Juan
Search Deals
JetBlue
  • JetBlue
  • 20/4
  • 1 total stop
  • 17h 45m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 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 1 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

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 31/3

06:00-22:08

2 stops21h 08m

San Juan Luis Munoz Marin Intl

Tue 7/4

16:32-18:50

2 stops21h 18m

£739

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 23/4

20:05-13:25

2 stops22h 20m

San Juan Luis Munoz Marin Intl

Sun 3/5

17:34-14:35

2 stops16h 01m

£971

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 4/5

19:30-23:59

3 stops33h 29m

San Juan Luis Munoz Marin Intl

Sun 10/5

07:05-09:35

2 stops21h 30m

£1,021

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 3/5

06:40-23:59

3 stops22h 19m

San Juan Luis Munoz Marin Intl

Thu 7/5

13:13-16:00

2 stops21h 47m

£1,037

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 11/5

07:05-22:17

3 stops20h 12m

San Juan Luis Munoz Marin Intl

Sat 23/5

07:05-09:35

2 stops21h 30m

£1,064

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 16/5

06:40-23:35

2 stops21h 55m

San Juan Luis Munoz Marin Intl

Sat 23/5

07:30-09:20

3 stops20h 50m

£1,304

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 19/3

06:40-11:46

3 stops33h 06m

San Juan Luis Munoz Marin Intl

Mon 13/4

07:15-14:35

3 stops26h 20m

£1,439

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 5/7

21:05-23:35

3 stops31h 30m

San Juan Luis Munoz Marin Intl

Thu 16/7

14:40-16:00

2 stops20h 20m

£1,519

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 12/3

07:25-20:26

1 stop17h 01m

£413

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 24/5

08:40-21:42

1 stop18h 02m

£435

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 15 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 27 February 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 47 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 £394). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of £541). 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 1 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

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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
2,896 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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
617 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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
3,127 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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
7,772 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Crew

8.2

Boarding

7.7

Entertainment

6.9

Comfort

7.5

Overall

7.6

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 £739, TAP AIR PORTUGAL can have you in San Juan Luis Munoz Marin Intl Airport from London Heathrow Airport in 21h 08m. 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 (£342), JetBlue (£407), and Finnair (£433) 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 47% 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 £394). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of £541). 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 1 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£342Average£1,032FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£406Average£606FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£429Average£588FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£502Average£647FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£536Average£964FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£557Average£888FlexibilityNo cancel feeOn-time77%
Search Iberia 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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