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Cheap flights from San Juan Luis Munoz Marin Intl Airport to London from £235

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Juan Luis Munoz Marin Intl Airport to London departing on 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Juan Luis Munoz Marin Intl Airport to London (SJU-LHR)

Cheap return flights

KLM Logo
14:08 - 06:50SJU-LHR
12h 42m1 stop
KLM Logo
10:10 - 23:50LHR-SJU
17h 40m1 stop
£424KLM
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Sun, 9 Nov - Thu, 20 Nov
Virgin Atlantic Logo
07:00 - 06:25SJU-LHR
18h 25m1 stop
Virgin Atlantic Logo
06:30 - 23:44LHR-SJU
22h 14m2 stops
£427Virgin Atlantic
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Wed, 10 Sep - Wed, 17 Sep
Delta Logo
18:00 - 12:35SJU-LHR
13h 35m1 stop
Delta Logo
06:30 - 23:44LHR-SJU
22h 14m2 stops
£431Delta
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Wed, 10 Sep - Wed, 17 Sep
United Airlines Logo
01:05 - 06:30SJU-LHR
24h 25m2 stops
United Airlines Logo
13:00 - 23:57LHR-SJU
15h 57m1 stop
£431United Airlines
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Tue, 23 Sep - Wed, 1 Oct
United Airlines Logo
01:05 - 20:40SJU-LHR
14h 35m1 stop
United Airlines Logo
13:00 - 23:57LHR-SJU
15h 57m1 stop
£432United Airlines
Find Deal
Tue, 23 Sep - Wed, 1 Oct
United Airlines Logo
13:25 - 10:40SJU-LHR
16h 15m2 stops
United Airlines Logo
12:15 - 23:57LHR-SJU
16h 42m2 stops
£435United Airlines
Find Deal
Wed, 24 Sep - Wed, 1 Oct
Delta Logo
07:15 - 08:45SJU-LHR
21h 30m2 stops
Delta Logo
15:50 - 13:52LHR-SJU
26h 02m2 stops
£439Delta
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Wed, 29 Oct - Thu, 6 Nov
Iberia Logo
16:50 - 12:05SJU-LHR
15h 15m1 stop
Iberia Logo
09:15 - 19:55LHR-SJU
14h 40m1 stop
£446Iberia
Find Deal
Thu, 22 Jan - Thu, 29 Jan
Iberia Logo
06:00 - 09:25SJU-LHR
22h 25m1 stop
Iberia Logo
19:10 - 15:05LHR-SJU
24h 55m1 stop
£454Iberia
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Sun, 17 Aug - Sat, 23 Aug
American Airlines Logo
16:43 - 12:30SJU-LHR
14h 47m1 stop
American Airlines Logo
13:40 - 11:11LHR-SJU
26h 31m1 stop
£466American Airlines
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Wed, 24 Sep - Wed, 1 Oct

KLM flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Our best KLM deals on San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flight tickets
KLM
9 Nov
SJU14:08San Juan Luis Munoz Marin Intl
12h 42m
1 stop
LHR06:50London Heathrow
20 Nov
LHR10:10London Heathrow
17h 40m
1 stop
SJU23:50San Juan Luis Munoz Marin Intl
£424
Find similar
KLM
22 Jan
SJU15:30San Juan Luis Munoz Marin Intl
16h 10m
1 stop
LHR11:40London Heathrow
29 Jan
LHR15:50London Heathrow
25h 10m
1 stop
SJU13:00San Juan Luis Munoz Marin Intl
£463
Find similar
KLM
23 Sept
SJU17:41San Juan Luis Munoz Marin Intl
14h 49m
1 stop
LHR13:30London Heathrow
6 Oct
LHR10:55London Heathrow
18h 01m
1 stop
SJU23:56San Juan Luis Munoz Marin Intl
£469
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Iberia flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Our best Iberia deals on San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flight tickets
Iberia
22 Jan
SJU16:50San Juan Luis Munoz Marin Intl
15h 15m
1 stop
LHR12:05London Heathrow
29 Jan
LHR09:15London Heathrow
14h 40m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
£446
Find similar
Iberia
17 Aug
SJU06:00San Juan Luis Munoz Marin Intl
22h 25m
1 stop
LHR09:25London Heathrow
23 Aug
LHR19:10London Heathrow
24h 55m
1 stop
SJU15:05San Juan Luis Munoz Marin Intl
£454
Find similar
Iberia
15 Aug
SJU06:00San Juan Luis Munoz Marin Intl
22h 25m
1 stop
LHR09:25London Heathrow
23 Aug
LHR18:45London Heathrow
25h 20m
1 stop
SJU15:05San Juan Luis Munoz Marin Intl
£491
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momondo Fare Finder

 
Customise your flight search to find flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 5 August 2025.
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

14:08-06:50

1 stop12h 42m

London Heathrow

Thu 20/11

10:10-23:50

1 stop17h 40m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/9

07:00-06:25

1 stop18h 25m

London Heathrow

Wed 17/9

06:30-23:44

2 stops22h 14m

£427

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/9

18:00-12:35

1 stop13h 35m

London Heathrow

Wed 17/9

06:30-23:44

2 stops22h 14m

£430

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 23/9

01:05-06:30

2 stops24h 25m

London Heathrow

Wed 1/10

13:00-23:57

1 stop15h 57m

£431

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 23/9

01:05-20:40

1 stop14h 35m

London Heathrow

Wed 1/10

13:00-23:57

1 stop15h 57m

£432

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 24/9

13:25-10:40

2 stops16h 15m

London Heathrow

Wed 1/10

12:15-23:57

2 stops16h 42m

£435

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

07:15-08:45

2 stops21h 30m

London Heathrow

Thu 6/11

15:50-13:52

2 stops26h 02m

£439

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

16:50-12:05

1 stop15h 15m

London Heathrow

Thu 29/1

09:15-19:55

1 stop14h 40m

£446

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 17/8

06:00-09:25

1 stop22h 25m

London Heathrow

Sat 23/8

19:10-15:05

1 stop24h 55m

£454

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 24/9

16:43-12:30

1 stop14h 47m

London Heathrow

Wed 1/10

13:40-11:11

1 stop26h 31m

£466

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, September is the cheapest month to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £515. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from San Juan Luis Munoz Marin Intl Airport averaging around £519.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £474. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £1,069.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport at midday for as low as £544. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £1,066 on average. Flights to London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £609 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport for as low as £481 on momondo.

How have San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flight prices changed over time?

As of August 2025, prices for San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flights are approximately 38% cheaper when compared to flights at the same time last year.

When to book flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport (SJU to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport

Best price found

£235

Fastest flight time

12h 20m

Direct flights

None
The best one-way flight to London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport in the past 72 hours is £235. The best return flight deal from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport found on momondo in the last 72 hours is £424.
The fastest flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport takes 12h 20m
There are no direct flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport. Popular non-direct route for this connection is San Juan Luis Munoz Marin Intl Airport - London Heathrow Airport.
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  • How far is San Juan Luis Munoz Marin Intl to London Heathrow by plane?

    A flight from San Juan Luis Munoz Marin Intl to London Heathrow will travel around 4178.9 mi. By plane, this route typically takes 12h 20m.

  • When did momondo last update prices for flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

    Prices for flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport were last updated today.

  • How old do you have to be to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Juan to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from San Juan to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from San Juan with this policy.

How can momondo help me find flights from San Juan to London?

momondo helps you find the best flight between San Juan and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from San Juan. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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