Cheap flights from San Juan to the United Kingdom from £150

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 the United Kingdom departing on 3/10. 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

American Airlines Logo
16:45 - 15:50SJU-GLA
19h 05m2 stops
American Airlines Logo
06:35 - 23:52GLA-SJU
21h 17m2 stops
£384American Airlines
Find Deal
Wed, 29 Oct - Fri, 7 Nov
Lufthansa Logo
01:05 - 20:40SJU-LHR
14h 35m1 stop
Lufthansa Logo
12:00 - 23:57LHR-SJU
16h 57m1 stop
£387Lufthansa
Find Deal
Mon, 6 Oct - Tue, 21 Oct
Iberia Logo
18:10 - 16:35SJU-LHR
18h 25m1 stop
Iberia Logo
11:25 - 19:55LHR-SJU
12h 30m1 stop
£408Iberia
Find Deal
Sun, 18 Jan - Tue, 27 Jan
KLM Logo
13:57 - 09:00SJU-LHR
15h 03m1 stop
KLM Logo
15:50 - 12:46LHR-SJU
24h 56m1 stop
£417KLM
Find Deal
Sun, 9 Nov - Thu, 20 Nov
British Airways Logo
18:50 - 12:05SJU-LHR
13h 15m1 stop
British Airways Logo
13:10 - 23:30LHR-SJU
14h 20m1 stop
£424British Airways
Find Deal
Wed, 18 Feb - Fri, 27 Feb
United Airlines Logo
01:05 - 20:40SJU-LHR
14h 35m1 stop
United Airlines Logo
08:30 - 23:57LHR-SJU
20h 27m2 stops
£427United Airlines
Find Deal
Mon, 6 Oct - Tue, 21 Oct
United Airlines Logo
15:52 - 11:15SJU-LHR
15h 23m1 stop
United Airlines Logo
09:10 - 22:22LHR-SJU
17h 12m2 stops
£427United Airlines
Find Deal
Wed, 29 Oct - Tue, 4 Nov
British Airways Logo
16:50 - 11:30SJU-LHR
14h 40m1 stop
British Airways Logo
13:25 - 00:10LHR-SJU
15h 45m1 stop
£436British Airways
Find Deal
Mon, 12 Jan - Fri, 17 Apr
KLM Logo
07:00 - 09:20SJU-EDI
21h 20m1 stop
KLM Logo
14:05 - 23:56EDI-SJU
14h 51m1 stop
£447KLM
Find Deal
Mon, 13 Oct - Thu, 23 Oct
Iberia Logo
18:10 - 10:50SJU-LGW
12h 40m1 stop
Iberia Logo
11:45 - 19:55LGW-SJU
12h 10m1 stop
£548Iberia
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Wed, 18 Feb - Thu, 26 Feb

United Airlines flights from San Juan to United Kingdom

Our best United Airlines deals on San Juan to United Kingdom flight tickets
United Airlines
24 Sept
SJU15:56San Juan Luis Munoz Marin Intl
14h 49m
1 stop
LHR11:45London Heathrow
1 Oct
LHR09:30London Heathrow
19h 27m
2 stops
SJU23:57San Juan Luis Munoz Marin Intl
United Airlines
24 Sept
SJU14:55San Juan Luis Munoz Marin Intl
15h 40m
1 stop
LHR11:35London Heathrow
1 Oct
LHR12:15London Heathrow
16h 42m
2 stops
SJU23:57San Juan Luis Munoz Marin Intl
United Airlines
29 Oct
SJU15:52San Juan Luis Munoz Marin Intl
15h 23m
1 stop
LHR11:15London Heathrow
4 Nov
LHR09:10London Heathrow
17h 12m
2 stops
SJU22:22San Juan Luis Munoz Marin Intl

Delta flights from San Juan to United Kingdom

Our best Delta deals on San Juan to United Kingdom flight tickets
Delta
29 Oct
SJU07:15San Juan Luis Munoz Marin Intl
21h 30m
2 stops
LHR08:45London Heathrow
6 Nov
LHR14:30London Heathrow
14h 26m
1 stop
SJU00:56San Juan Luis Munoz Marin Intl
Delta
18 Jan
SJU06:15San Juan Luis Munoz Marin Intl
21h 35m
1 stop
LHR07:50London Heathrow
27 Jan
LHR08:55London Heathrow
15h 35m
1 stop
SJU20:30San Juan Luis Munoz Marin Intl
Delta
15 Feb
SJU06:15San Juan Luis Munoz Marin Intl
21h 35m
1 stop
LHR07:50London Heathrow
25 Feb
LHR10:10London Heathrow
17h 39m
2 stops
SJU23:49San Juan Luis Munoz Marin Intl

momondo Fare Finder

 
Customise your flight search to find flights from San Juan to United Kingdom 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 17 September 2025.
Use the filters below to find and compare flights from San Juan to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JuanGlasgow

SJU - GLA

SJUGLA

San Juan Luis Munoz Marin Intl

Wed 29/10

16:45-15:50

2 stops19h 05m

Glasgow Intl

Fri 7/11

06:35-23:52

2 stops21h 17m

£384

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 6/10

01:05-20:40

1 stop14h 35m

London Heathrow

Tue 21/10

12:00-23:57

1 stop16h 57m

£387

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 18/1

18:10-16:35

1 stop18h 25m

London Heathrow

Tue 27/1

11:25-19:55

1 stop12h 30m

£408

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

15:50-12:46

1 stop24h 56m

£417

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

18:50-12:05

1 stop13h 15m

London Heathrow

Fri 27/2

13:10-23:30

1 stop14h 20m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 6/10

01:05-20:40

1 stop14h 35m

London Heathrow

Tue 21/10

08:30-23:57

2 stops20h 27m

£427

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

15:52-11:15

1 stop15h 23m

London Heathrow

Tue 4/11

09:10-22:22

2 stops17h 12m

£427

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 12/1

16:50-11:30

1 stop14h 40m

London Heathrow

Fri 17/4

13:25-00:10

1 stop15h 45m

£436

San JuanEdinburgh

SJU - EDI

SJUEDI

San Juan Luis Munoz Marin Intl

Mon 13/10

07:00-09:20

1 stop21h 20m

Edinburgh Turnhouse

Thu 23/10

14:05-23:56

1 stop14h 51m

£447

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Wed 18/2

18:10-10:50

1 stop12h 40m

London Gatwick

Thu 26/2

11:45-19:55

1 stop12h 10m

£548

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 the United Kingdom from

How to get the cheapest flight ticket from San Juan to United Kingdom

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 United Kingdom?

The cheapest month to fly to United Kingdom from San Juan is in February. Flight prices, which tend to average around £489, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of February, then departing from San Juan during the month October is also very affordable. Most momondo users find prices during this month for around £489.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from San Juan to United Kingdom is on a Wednesday. Travellers who choose to depart for United Kingdom on a Wednesday will often find tickets for as low as £484. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Juan to United Kingdom for around £776.

What is the cheapest time of day to depart on your flight to United Kingdom?

The cheapest time of day to fly to United Kingdom is in the afternoon when flights can be purchased for as low as £484. Try not to purchase tickets in the morning because they tend to be around £839. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £602 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from San Juan for as low as £449 on momondo.

Cheap San Juan to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to United Kingdom

Direct flights

None
There are no direct flights from San Juan to United Kingdom. There are no popular flight routes from San Juan to United Kingdom.
  • When did momondo last update prices for flights from San Juan to United Kingdom?

    Prices for flights from San Juan to United Kingdom are refreshed on a daily basis.

  • How old do you have to be to fly from San Juan to United Kingdom?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

It is quick and easy to find San Juan to United Kingdom flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to United Kingdom that suits you.

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

Flights from San Juan to United Kingdom with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between San Juan and United Kingdom 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 United Kingdom right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Juan to United Kingdom now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to United Kingdom and let you know when they change.

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1 adult
Fri 17/10
Fri 24/10

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