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$292+ Cheap flights from San Juan to Heathrow (LHR)

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from San Juan to Heathrow

Cheapest flights from San Juan to Heathrow
Explore the most affordable flight options available from San Juan to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This JetBlue deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:38 amSJU - LHR
1 stop18h 52mJetBlue
Sat 1/108:05 amLHR - SJU
1 stop19h 45mJetBlue
Deal found 12/26$820
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Sat 1/108:00 amLHR - SJU
2 stops18h 22mUnited Airlines
Deal found 12/26$946
This Delta deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:30 amSJU - LHR
2 stops21h 15mDelta
Sat 1/104:35 pmLHR - SJU
2 stops25h 35mDelta
Deal found 12/26$951
This JetBlue deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:40 pmSJU - LHR
1 stop14h 15mJetBlue
Wed 1/77:25 amLHR - SJU
1 stop14h 29mJetBlue
Deal found 12/26$1,017
This JetBlue deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:40 pmSJU - LHR
1 stop14h 15mJetBlue
Fri 1/98:05 amLHR - SJU
1 stop20h 53mJetBlue
Deal found 12/25$1,074
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Wed 1/710:25 amLHR - SJU
2 stops18h 11mUnited Airlines
Deal found 12/26$1,340
This Delta deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:30 amSJU - LHR
2 stops19h 35mDelta
Wed 1/78:00 pmLHR - SJU
2 stops25h 17mDelta
Deal found 12/26$1,345
This JetBlue deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:40 pmSJU - LHR
1 stop14h 15mJetBlue
Thu 1/19:20 amLHR - SJU
1 stop19h 45mJetBlue
Deal found 12/26$1,347
This JetBlue deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:40 pmSJU - LHR
1 stop14h 15mJetBlue
Tue 1/67:25 amLHR - SJU
1 stop14h 29mJetBlue
Deal found 12/26$1,426
This JetBlue deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:40 pmSJU - LHR
1 stop14h 15mJetBlue
Mon 1/59:20 amLHR - SJU
1 stop14h 05mJetBlue
Deal found 12/27$1,447
This United Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:45 amSJU - LHR
1 stop19h 45mUnited Airlines
Mon 1/56:50 amLHR - SJU
2 stops34h 27mUnited Airlines
Deal found 12/25$1,448

Find flight deals from San Juan to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Heathrow (LHR). 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 December 28, 2025.

Round-trip from

$568
(United Airlines)

One-way from

$292
(JetBlue)

Popular in

June

Cheapest in

September

Average price

$1,103
From San Juan to London Heathrow
Search Deals
One-way flight from San Juan to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($245 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from San Juan to Heathrow 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 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from San Juan to London Heathrow Airport that are best for you.

Fly from

San Juan

Fly to

Heathrow

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/11

2:15 pm-9:10 am

1 stop14h 55m

London Heathrow

Wed 2/18

6:50 am-9:00 pm

2 stops18h 10m

$577

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/11

6:15 am-6:55 am

1 stop20h 40m

London Heathrow

Wed 2/18

7:25 am-10:32 pm

1 stop19h 07m

$587

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

5:15 am-9:40 pm

1 stop12h 25m

London Heathrow

Thu 2/26

12:20 pm-3:51 am

1 stop19h 31m

$587

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 1/23

2:15 pm-9:10 am

1 stop14h 55m

London Heathrow

Tue 1/27

8:30 am-10:22 pm

2 stops17h 52m

$588

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 1/23

4:52 pm-11:15 am

1 stop14h 23m

London Heathrow

Sat 1/31

8:30 am-10:22 pm

2 stops17h 52m

$588

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 3/30

7:40 am-8:30 am

1 stop19h 50m

London Heathrow

Wed 4/8

6:55 am-9:24 pm

2 stops19h 29m

$593

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 3/7

3:40 pm-11:20 am

1 stop15h 40m

London Heathrow

Sat 3/21

1:25 pm-12:55 pm

1 stop27h 30m

$601

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 3/9

7:30 am-5:55 am

1 stop18h 25m

London Heathrow

Sun 3/15

1:25 pm-9:22 pm

2 stops35h 57m

$609

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/19

7:30 am-8:45 am

2 stops21h 15m

London Heathrow

Sun 3/1

10:10 am-11:58 pm

2 stops17h 48m

$615

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

7:30 am-8:45 am

2 stops21h 15m

London Heathrow

Thu 2/26

10:10 am-11:58 pm

2 stops17h 48m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 15 results
1
2

Best time to book a flight from San Juan to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Juan with our price prediction graph.
Estimated round-trip 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 to London Heathrow Airport

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

Use this chart to determine the optimal time to book a round-trip flight from San Juan to Heathrow. Price data was last updated on December 26, 2025.

To ensure you get the cheapest price possible for a flight from San Juan to London Heathrow Airport, you should look to book at least 69 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, September is the cheapest month in which you can book a flight from San Juan to London Heathrow Airport (average of $101). Flying from San Juan to London Heathrow Airport in June is currently the most expensive (average of $982). 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated December 28, 2025.
Peruse reviews from past customers who have flown with Delta, Virgin Atlantic, and United Airlines from San Juan to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
8,019 reviews
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.5
Good
677 reviews
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
9,113 reviews
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
11,073 reviews
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
JetBlue
7.2
Good
2,901 reviews
Delta
7.9
Good
8,019 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Juan 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 to London Heathrow Airport?

    There are many flights that can get you from San Juan to London Heathrow Airport in 14h 55m. Fly via United Airlines or JetBlue to get the fastest option. The distance from San Juan to London Heathrow Airport is about 4179 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from San Juan to London Heathrow Airport round-trip?

    According to our current data, JetBlue ($101), British Airways ($546), and Virgin Atlantic ($584) offers the cheapest pricing from San Juan to London Heathrow Airport. You may be able to fly from San Juan to London Heathrow Airport for 87% less than the average price by searching for these airlines.

  • Can I find deals for flights from San Juan to Heathrow that include hotel bookings?

    Yes. In addition to deals on San Juan to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Juan to Heathrow?

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

  • Can I find deals for business class flights from San Juan to Heathrow?

    Yes. Cheapflights offers flight deals from San Juan 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 to London Heathrow Airport?

    Currently, September is the cheapest month in which you can book a flight from San Juan to London Heathrow Airport (average of $101). Flying from San Juan to London Heathrow Airport in June is currently the most expensive (average of $982). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Juan to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Luis Munoz Marin Intl to Heathrow flights

Top 6 airlines flying from San Juan to Heathrow

Discover the top 6 airlines that operate flights from San Juan to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$780FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$707FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$584Average$750FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$600Average$799FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$605Average$1,041FlexibilityNo cancel feeOn-time71%
DeltaCheapest$652Average$859FlexibilityNo cancel feeOn-timeN/A

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