Cheap flights from San Juan Luis Munoz Marin Intl Airport to London from £138

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to London are usually found in February or October, booked 42 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Luis Munoz Marin Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Luis Munoz Marin Intl (SJU) to London (LON). 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 18 September 2025.

Round-trip from

£401

One-way from

£138

Popular in

June

Cheapest in

February

Average price

£514
American Airlines
  • American Airlines
  • 15/2-25/2
  • 2 total stops
  • 24h 55m total
  • San Juan to London
8/10
  • 8/10
  • 1 total stop
  • 18h 58m total
  • San Juan to London
Highest demand for flights based on searches. 15% potential increase in price (£78 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Luis Munoz Marin Intl to London

Cheapest flights from Luis Munoz Marin Intl to London
Explore the most affordable flight options available from Luis Munoz Marin Intl to London. 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
Tue 30/903:39SJU - LGW
1 stop25h 21mMultiple Airlines
Wed 8/1014:00LGW - SJU
1 stop17h 30mMultiple Airlines
Deal found 17/9£436
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
Sat 18/1006:22SJU - LGW
1 stop18h 58mMultiple Airlines
Sun 2/1113:00LGW - SJU
1 stop32h 54mMultiple Airlines
Deal found 16/9£455

Cheapflights Fare Finder

 
Customise your flight search to find flights from Luis Munoz Marin Intl to London 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 18 September 2025.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to London that are best for you.

Fly from

Luis Munoz Marin Intl

Fly to

London

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 55 results
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Best time to book a flight from Luis Munoz Marin Intl to London

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

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

Use this chart to determine the optimal time to book a return flight from Luis Munoz Marin Intl to London. Price data was last updated on 12 September 2025.

Booking 41 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Juan Luis Munoz Marin Intl Airport to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

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

Find hourly flight availability from Luis Munoz Marin Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

A simple way to save on the total cost of your ticket is to fly from San Juan Luis Munoz Marin Intl Airport to London in the afternoon. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the morning.

What’s the top stopover airport for flights from San Juan Luis Munoz Marin Intl Airport to London?

Share of one-stop return flights from San Juan Luis Munoz Marin Intl Airport to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

New York (JFK) – chosen by Cheapflights users on 86% of one-stop itineraries from San Juan Luis Munoz Marin Intl Airport to London on Cheapflights.

What’s the cheapest stopover airport for flights from San Juan Luis Munoz Marin Intl Airport to London?

Average return fare for one-stop flights from San Juan Luis Munoz Marin Intl Airport to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Madrid (MAD) is the most affordable one-stop option, with an average return flight price of £736.

What’s the fastest stopover option from San Juan Luis Munoz Marin Intl Airport to London?

Shortest average travel time for one-stop one-way flights from San Juan Luis Munoz Marin Intl Airport to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via New York (JFK) have the shortest average one-way travel time for one-stop routes: 12h 42m.

Which airport typically offers the quickest stopover for flights from San Juan Luis Munoz Marin Intl Airport to London?

Average stopover duration for one-stop one-way flights from San Juan Luis Munoz Marin Intl Airport to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 46m.

Related info for your journey

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

    KLM, British Airways, and United Airlines can get you from San Juan Luis Munoz Marin Intl Airport to London in just under 13h 15m. Your travel time can differ by up to 1h 48m. The distance from San Juan Luis Munoz Marin Intl Airport to London is about 4179 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from San Juan Luis Munoz Marin Intl Airport to London?

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

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

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

    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 London.

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

    Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl to London 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?

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

See more FAQs

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Alternative routes for Luis Munoz Marin Intl to London

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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 London from Luis Munoz Marin Intl.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Luis Munoz Marin Intl to London flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Luis Munoz Marin Intl today and book when prices fit your budget.

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