In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

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

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

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

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

Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£182+ Flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Q: What is the cheapest day to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

Travellers seeking maximum savings on their San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to London Heathrow are usually found in September or October, booked 69 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap flight deals from Luis Munoz Marin Intl to Heathrow

Round-trip from	£401
One-way from	£182
Popular in	June
Cheapest in	September
Average price	£453

American Airlines
15/2-25/2
2 total stops
24h 55m total
San Juan to London

Search Deals

20/11
2 total stops
20h 34m total
San Juan to London

Search Deals

Highest demand for flights based on searches. 23% potential increase in price (£137 potential increase over avg. return price).

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Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

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Find flight deals from Luis Munoz Marin Intl to Heathrow

Cheapest flights from Luis Munoz Marin Intl to Heathrow
Explore the most affordable flight options available from Luis Munoz Marin Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Sun 9/1113:57SJU - LHR

1 stop15h 03mKLM

Thu 20/1112:30LHR - SJU

1 stop14h 43mKLM

Deal found 16/9£417

Wed 1/1013:32SJU - LHR

1 stop15h 43mKLM

Wed 8/1015:15LHR - SJU

1 stop25h 21mKLM

Deal found 17/9£418

Wed 24/916:55SJU - LHR

1 stop13h 30mUnited Airlines

Wed 1/1009:30LHR - SJU

2 stops19h 27mUnited Airlines

Deal found 16/9£424

Wed 24/917:41SJU - LHR

1 stop14h 49mKLM

Wed 1/1009:20LHR - SJU

1 stop17h 40mKLM

Deal found 17/9£424

Wed 29/1015:52SJU - LHR

1 stop15h 23mUnited Airlines

Tue 4/1109:10LHR - SJU

2 stops17h 12mUnited Airlines

Deal found 16/9£427

Wed 29/1007:15SJU - LHR

2 stops19h 50mDelta

Fri 7/1110:45LHR - SJU

1 stop16h 14mDelta

Deal found 16/9£431

Mon 10/1102:05SJU - LHR

1 stop15h 15mUnited Airlines

Thu 20/1109:10LHR - SJU

2 stops17h 12mUnited Airlines

Deal found 16/9£447

Mon 13/1001:05SJU - LHR

1 stop14h 35mUnited Airlines

Tue 21/1013:00LHR - SJU

1 stop15h 57mUnited Airlines

Deal found 17/9£448

Sat 18/1001:05SJU - LHR

2 stops24h 15mUnited Airlines

Wed 29/1006:50LHR - SJU

2 stops18h 32mUnited Airlines

Deal found 16/9£449

Tue 7/1013:06SJU - LHR

1 stop14h 44mKLM

Sun 19/1010:55LHR - SJU

1 stop18h 01mKLM

Deal found 17/9£454

Wed 29/1014:46SJU - LHR

1 stop15h 29mUnited Airlines

Thu 6/1109:10LHR - SJU

2 stops17h 12mUnited Airlines

Deal found 18/9£458

Best flights from Luis Munoz Marin Intl to Heathrow
Discover carefully curated flight deals from Luis Munoz Marin Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Sun 9/1113:57SJU - LHR

1 stop15h 03mKLM

Thu 20/1112:30LHR - SJU

1 stop14h 43mKLM

Deal found 16/9£417

Wed 18/218:50SJU - LHR

1 stop13h 15mBritish Airways

Thu 26/211:55LHR - SJU

1 stop15h 25mBritish Airways

Deal found 16/9£424

Tue 14/1001:05SJU - LHR

1 stop14h 35mUnited Airlines

Wed 22/1014:05LHR - SJU

2 stops28h 40mUnited Airlines

Deal found 15/9£424

Wed 29/1016:45SJU - LHR

1 stop12h 30mAmerican Airlines

Thu 6/1109:55LHR - SJU

1 stop15h 03mAmerican Airlines

Deal found 18/9£424

Wed 29/1007:15SJU - LHR

2 stops19h 50mDelta

Fri 7/1110:45LHR - SJU

1 stop16h 14mDelta

Deal found 16/9£431

Tue 14/1014:31SJU - LHR

1 stop15h 39mKLM

Tue 21/1010:55LHR - SJU

1 stop18h 01mKLM

Deal found 17/9£418

Wed 29/1016:50SJU - LHR

1 stop14h 00mUnited Airlines

Tue 4/1109:10LHR - SJU

2 stops17h 12mUnited Airlines

Deal found 17/9£427

Wed 29/1007:15SJU - LHR

2 stops19h 50mDelta

Thu 6/1110:10LHR - SJU

1 stop18h 46mDelta

Deal found 17/9£431

Wed 29/1014:31SJU - LHR

1 stop14h 29mKLM

Thu 6/1110:10LHR - SJU

1 stop18h 46mKLM

Deal found 16/9£424

Wed 29/1013:06SJU - LHR

1 stop14h 59mKLM

Tue 4/1110:10LHR - SJU

1 stop18h 46mKLM

Deal found 17/9£424

Last-minute flights from Luis Munoz Marin Intl to Heathrow
Discover last-minute flight deals from Luis Munoz Marin Intl to Heathrow. Data last updated 18 September 2025 and is based on user searches.

Tue 23/901:05SJU - LHR

2 stops24h 25mAir Canada

Wed 1/1009:30LHR - SJU

2 stops19h 27mAir Canada

Deal found 17/9£606

Wed 24/916:55SJU - LHR

1 stop13h 30mUnited Airlines

Wed 1/1009:30LHR - SJU

2 stops19h 27mUnited Airlines

Deal found 16/9£424

Wed 24/917:41SJU - LHR

1 stop14h 49mKLM

Wed 1/1009:20LHR - SJU

1 stop17h 40mKLM

Deal found 17/9£424

Wed 24/901:05SJU - LHR

1 stop14h 35mUnited Airlines

Fri 10/1013:00LHR - SJU

1 stop15h 57mUnited Airlines

Deal found 17/9£506

Thu 25/913:25SJU - LHR

1 stop12h 20mKLM

Fri 10/1010:55LHR - SJU

1 stop18h 01mKLM

Deal found 16/9£460

Thu 25/907:30SJU - LHR

2 stops20h 20mDelta

Fri 10/1012:55LHR - SJU

1 stop16h 01mDelta

Deal found 16/9£467

Sun 28/913:32SJU - LHR

1 stop14h 43mDelta

Mon 6/1015:20LHR - SJU

2 stops25h 36mDelta

Deal found 17/9£459

One-way flights from Luis Munoz Marin Intl to Heathrow
Search for one-way flight options from Luis Munoz Marin Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 18 September 2025.

Thu 20/1107:11SJU - LHR

2 stops20h 34mMultiple Airlines

Deal found 16/9£182

Sat 18/1006:22SJU - LHR

2 stops34h 38mMultiple Airlines

Deal found 17/9£203

Sun 19/1005:30SJU - LHR

2 stops23h 50mMultiple Airlines

Deal found 16/9£213

Sat 18/1013:25SJU - LHR

1 stop15h 05mJetBlue

Deal found 16/9£214

Fri 3/1019:50SJU - LHR

2 stops33h 30mMultiple Airlines

Deal found 15/9£226

Wed 25/201:59SJU - LHR

1 stop14h 46mJetBlue

Deal found 16/9£227

Thu 30/1009:00SJU - LHR

2 stops28h 30mMultiple Airlines

Deal found 16/9£236

Mon 12/111:15SJU - LHR

1 stop18h 15mJetBlue

Deal found 18/9£237

Thu 16/1014:25SJU - LHR

1 stop14h 05mJetBlue

Deal found 17/9£239

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 9/11

13:57-09:00

1 stop15h 03m

London Heathrow

Thu 20/11

12:30-23:13

1 stop14h 43m

£417

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 14/10

14:31-11:10

1 stop15h 39m

London Heathrow

Tue 21/10

10:55-23:56

1 stop18h 01m

£418

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

18:50-12:05

1 stop13h 15m

London Heathrow

Thu 26/2

11:55-23:20

1 stop15h 25m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 14/10

01:05-20:40

1 stop14h 35m

London Heathrow

Wed 22/10

14:05-13:45

2 stops28h 40m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

14:31-09:00

1 stop14h 29m

London Heathrow

Thu 6/11

10:10-00:56

1 stop18h 46m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

16:45-09:15

1 stop12h 30m

London Heathrow

Thu 6/11

09:55-20:58

1 stop15h 03m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

13:06-08:05

1 stop14h 59m

London Heathrow

Tue 4/11

10:10-00:56

1 stop18h 46m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

16:50-10:50

1 stop14h 00m

London Heathrow

Tue 4/11

09:10-22:22

2 stops17h 12m

£427

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

07:15-07:05

2 stops19h 50m

London Heathrow

Fri 7/11

10:45-22:59

1 stop16h 14m

£431

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

07:15-07:05

2 stops19h 50m

London Heathrow

Thu 6/11

10:10-00:56

1 stop18h 46m

£431

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 17 results

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

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

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

The price you pay for your flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport (average of £112). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

What is the cheapest time of day to fly from SJU to LHR?

It’s optimal to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in the morning. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight in the afternoon.

Related info for your journey

How long is the flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?
For as low as £424, KLM can have you in London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport in 13h 15m. Airlines will cover a distance of 4179 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from Luis Munoz Marin Intl to Heathrow that include hotel bookings?
Yes. In addition to deals on Luis Munoz Marin Intl to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Luis Munoz Marin Intl to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Luis Munoz Marin Intl to Heathrow.
Can I find deals for business class flights from Luis Munoz Marin Intl to Heathrow?
Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl to Heathrow 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 San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport (average of £112). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

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

Deals for Luis Munoz Marin Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Luis Munoz Marin Intl to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Luis Munoz Marin Intl to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Heathrow from Luis Munoz Marin Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport from £182

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 20/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to London Heathrow are usually found in September or October, booked 69 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap flight deals from Luis Munoz Marin Intl to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Luis Munoz Marin Intl to Heathrow

Cheapest flights from Luis Munoz Marin Intl to HeathrowExplore the most affordable flight options available from Luis Munoz Marin Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Explore the most affordable flight options available from Luis Munoz Marin Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport that are best for you.

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

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Luis Munoz Marin Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

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

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

What is the cheapest time of day to fly from SJU to LHR?

Related info for your journey

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for Luis Munoz Marin Intl to Heathrow

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

Why should you use Cheapflights to find cheap flight tickets from Luis Munoz Marin Intl to Heathrow?

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

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

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Cheapest flights from Luis Munoz Marin Intl to Heathrow
Explore the most affordable flight options available from Luis Munoz Marin Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.