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Cheap flights from San Juan to London from £225

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 to London departing on 25/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
07:15 - 06:20
SJU
-
LHR
18h 05m
1 stop
Virgin Atlantic Logo
06:15 - 20:24
LHR
-
SJU
19h 09m
2 stops
£382Virgin Atlantic
Wed, 22 Apr - Wed, 29 Apr
Virgin Atlantic Logo
07:15 - 06:20
SJU
-
LHR
18h 05m
1 stop
Virgin Atlantic Logo
09:20 - 20:24
LHR
-
SJU
16h 04m
1 stop
£396Virgin Atlantic
Wed, 22 Apr - Wed, 29 Apr
JetBlue Logo
05:10 - 21:40
SJU
-
LHR
12h 30m
1 stop
JetBlue Logo
07:25 - 21:24
LHR
-
SJU
17h 59m
1 stop
£422JetBlue
Thu, 26 Feb - Wed, 11 Mar
JetBlue Logo
23:59 - 20:45
SJU
-
LHR
16h 46m
1 stop
JetBlue Logo
09:20 - 20:56
LHR
-
SJU
15h 36m
1 stop
£444JetBlue
Thu, 5 Mar - Mon, 9 Mar
British Airways Logo
15:44 - 11:05
SJU
-
LHR
14h 21m
1 stop
British Airways Logo
12:30 - 22:05
LHR
-
SJU
14h 35m
1 stop
£455British Airways
Wed, 22 Apr - Wed, 29 Apr
British Airways Logo
15:44 - 11:05
SJU
-
LHR
14h 21m
1 stop
British Airways Logo
15:00 - 12:29
LHR
-
SJU
26h 29m
1 stop
£457British Airways
Wed, 22 Apr - Wed, 29 Apr
JetBlue Logo
06:10 - 06:55
SJU
-
LHR
20h 45m
1 stop
JetBlue Logo
08:05 - 02:54
LHR
-
SJU
22h 49m
1 stop
£459JetBlue
Mon, 2 Mar - Mon, 9 Mar
Delta Logo
14:45 - 12:05
SJU
-
LHR
16h 20m
2 stops
Delta Logo
20:05 - 16:23
LHR
-
SJU
25h 18m
2 stops
£463Delta
Wed, 22 Apr - Wed, 29 Apr
Iberia Logo
15:44 - 11:05
SJU
-
LHR
14h 21m
1 stop
Iberia Logo
12:15 - 21:59
LHR
-
SJU
14h 44m
1 stop
£466Iberia
Wed, 13 May - Wed, 3 Jun
JetBlue Logo
05:01 - 21:40
SJU
-
LHR
12h 39m
1 stop
JetBlue Logo
12:20 - 23:29
LHR
-
SJU
15h 09m
1 stop
£477JetBlue
Thu, 5 Mar - Mon, 9 Mar

JetBlue flights from San Juan to London Heathrow Airport

Our best JetBlue deals on San Juan to London Heathrow Airport flight tickets
JetBlue
26 Feb
SJU05:10San Juan Luis Munoz Marin Intl
12h 30m
1 stop
LHR21:40London Heathrow
11 Mar
LHR07:25London Heathrow
17h 59m
1 stop
SJU21:24San Juan Luis Munoz Marin Intl
£422
JetBlue
5 Mar
SJU05:01San Juan Luis Munoz Marin Intl
12h 39m
1 stop
LHR21:40London Heathrow
9 Mar
LHR12:20London Heathrow
15h 09m
1 stop
SJU23:29San Juan Luis Munoz Marin Intl
£444
JetBlue
2 Mar
SJU06:10San Juan Luis Munoz Marin Intl
20h 45m
1 stop
LHR06:55London Heathrow
9 Mar
LHR08:05London Heathrow
22h 49m
1 stop
SJU02:54San Juan Luis Munoz Marin Intl
£459

KLM flights from San Juan to London Heathrow Airport

Our best KLM deals on San Juan to London Heathrow Airport flight tickets
KLM
9 Apr
SJU15:30San Juan Luis Munoz Marin Intl
16h 35m
1 stop
LHR13:05London Heathrow
22 Apr
LHR11:15London Heathrow
16h 57m
1 stop
SJU23:12San Juan Luis Munoz Marin Intl
£486
KLM
4 May
SJU17:34San Juan Luis Munoz Marin Intl
14h 41m
1 stop
LHR13:15London Heathrow
17 May
LHR08:20London Heathrow
20h 23m
1 stop
SJU23:43San Juan Luis Munoz Marin Intl
£493
KLM
22 Mar
SJU14:44San Juan Luis Munoz Marin Intl
14h 16m
1 stop
LHR09:00London Heathrow
30 Mar
LHR15:15London Heathrow
25h 31m
1 stop
SJU11:46San Juan Luis Munoz Marin Intl
£505

momondo Fare Finder

 
Customise your flight search to find flights from San Juan 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 16 February 2026.
Use the filters below to find and compare flights from San Juan 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

Wed 22/4

07:15-06:20

1 stop18h 05m

London Heathrow

Wed 29/4

06:15-20:24

2 stops19h 09m

£382

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

07:15-06:20

1 stop18h 05m

London Heathrow

Wed 29/4

09:20-20:24

1 stop16h 04m

£396

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 26/2

05:10-21:40

1 stop12h 30m

London Heathrow

Wed 11/3

07:25-21:24

1 stop17h 59m

£422

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 5/3

23:59-20:45

1 stop16h 46m

London Heathrow

Mon 9/3

09:20-20:56

1 stop15h 36m

£444

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

15:44-11:05

1 stop14h 21m

London Heathrow

Wed 29/4

12:30-22:05

1 stop14h 35m

£455

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

15:44-11:05

1 stop14h 21m

London Heathrow

Wed 29/4

15:00-12:29

1 stop26h 29m

£457

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 2/3

06:10-06:55

1 stop20h 45m

London Heathrow

Mon 9/3

08:05-02:54

1 stop22h 49m

£459

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

14:45-12:05

2 stops16h 20m

London Heathrow

Wed 29/4

20:05-16:23

2 stops25h 18m

£463

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 13/5

15:44-11:05

1 stop14h 21m

London Heathrow

Wed 3/6

12:15-21:59

1 stop14h 44m

£466

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 5/3

05:01-21:40

1 stop12h 39m

London Heathrow

Mon 9/3

12:20-23:29

1 stop15h 09m

£477

Flights are sorted by cheapest return flights first.

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

How to get the cheapest flight ticket from San Juan 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 to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £461. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from San Juan averaging around £500.

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 when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £610 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 for as low as £518 on momondo.

Cheap San Juan to London Heathrow Airport flight deals and tips

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

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from San Juan to London Heathrow Airport takes 12h 30m
There are no direct flights from San Juan to London Heathrow Airport. There are no popular flight routes from San Juan to London Heathrow Airport.
Search flight deals

  • How far is San Juan to London Heathrow by plane?

    London Heathrow is 4182.0 mi away from San Juan. Flights usually cover this in 12h 30m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from San Juan to London Heathrow Airport refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Juan to London Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Ipswich
Ilford
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Poole
Chelmsford
Hayes
Wembley
Dover
Folkestone

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from San Juan.

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

All flight searches from San Juan to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

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

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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