$278+ Cheap flights from San Juan to London (LON)
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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
Mar 14 — Mar 211
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Juan to London with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Juan to London
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Juan to LondonExplore the most affordable flight options available from San Juan to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.
Explore the most affordable flight options available from San Juan to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 3/117:30 am
SJU
- LHR
1 stop18h 25m
United Airlines
Wed 3/186:50 am
LHR
- SJU
2 stops18h 32m
United Airlines
Deal found 2/9![United Airlines logo]()
$578
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/97:30 am
SJU
- LHR
1 stop18h 55m
Delta
Tue 3/178:40 am
LHR
- SJU
2 stops19h 19m
Delta
Deal found 2/9![Delta logo]()
$584
This Delta deal was found by Cheapflights users on 2/10. 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 3/106:15 am
SJU
- LHR
1 stop25h 25m
Delta
Mon 3/1610:00 am
LHR
- SJU
2 stops17h 59m
Delta
Deal found 2/10![Delta logo]()
$585
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/99:15 am
SJU
- LHR
1 stop18h 15m
United Airlines
Mon 3/167:30 am
LHR
- SJU
2 stops17h 52m
United Airlines
Deal found 2/9![United Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 4/221:25 pm
SJU
- LHR
1 stop13h 55m
United Airlines
Wed 4/297:30 am
LHR
- SJU
2 stops18h 54m
United Airlines
Deal found 2/9![United Airlines logo]()
$596
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/96:40 am
SJU
- LHR
1 stop20h 50m
United Airlines
Fri 3/208:00 am
LHR
- SJU
2 stops17h 22m
United Airlines
Deal found 2/9![United Airlines logo]()
$597
This JetBlue deal was found by Cheapflights users on 2/9. 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.
Thu 3/52:25 pm
SJU
- LHR
1 stop12h 30m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This JetBlue deal was found by Cheapflights users on 2/10. 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.
Thu 3/55:01 am
SJU
- LHR
1 stop12h 39m
JetBlue
Mon 3/1612:20 pm
LHR
- SJU
1 stop18h 07m
JetBlue
Deal found 2/10![JetBlue logo]()
$607
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/107:05 am
SJU
- LHR
1 stop19h 35m
United Airlines
Wed 3/189:10 am
LHR
- SJU
2 stops16h 12m
United Airlines
Deal found 2/9![United Airlines logo]()
$611
This KLM deal was found by Cheapflights users on 2/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:34 pm
SJU
- LHR
1 stop14h 41m
KLM
Wed 4/299:20 am
LHR
- SJU
1 stop18h 53m
KLM
Deal found 2/9![KLM logo]()
$614
This KLM deal was found by Cheapflights users on 2/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:44 pm
SJU
- LHR
1 stop15h 36m
KLM
Tue 4/711:15 am
LHR
- SJU
1 stop17h 00m
KLM
Deal found 2/9![KLM logo]()
$623
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:57 am
SJU
- LGW
1 stop19h 03m
Multiple Airlines
Mon 3/162:00 pm
LGW
- SJU
2 stops28h 17m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$722
Best flights from San Juan to LondonDiscover carefully curated flight deals from San Juan to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 12, 2026.
Discover carefully curated flight deals from San Juan to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 12, 2026.
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/97:30 am
SJU
- LHR
1 stop18h 55m
Delta
Tue 3/178:40 am
LHR
- SJU
2 stops19h 19m
Delta
Deal found 2/9![Delta logo]()
$584
This JetBlue deal was found by Cheapflights users on 2/9. 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.
Thu 3/52:25 pm
SJU
- LHR
1 stop12h 30m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This KLM deal was found by Cheapflights users on 2/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:44 pm
SJU
- LHR
1 stop14h 16m
KLM
Mon 3/164:35 pm
LHR
- SJU
1 stop23h 32m
KLM
Deal found 2/9![KLM logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:57 am
SJU
- LGW
1 stop19h 03m
Multiple Airlines
Mon 3/162:00 pm
LGW
- SJU
1 stop22h 53m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$729
This TAP AIR PORTUGAL deal was found by Cheapflights users on 2/9. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:01 am
SJU
- LGW
2 stops48h 24m
TAP AIR PORTUGAL
Mon 3/1611:00 am
LGW
- SJU
2 stops40h 06m
TAP AIR PORTUGAL
Deal found 2/9![TAP AIR PORTUGAL logo]()
$923
This Delta deal was found by Cheapflights users on 2/9. 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 3/115:27 pm
SJU
- LHR
1 stop12h 48m
Delta
Mon 3/168:40 am
LHR
- SJU
2 stops19h 19m
Delta
Deal found 2/9![Delta logo]()
$584
This JetBlue deal was found by Cheapflights users on 2/9. 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 3/104:15 am
SJU
- LHR
1 stop13h 25m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This Delta deal was found by Cheapflights users on 2/9. 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 3/107:30 am
SJU
- LHR
1 stop21h 30m
Delta
Tue 3/176:30 am
LHR
- SJU
2 stops21h 29m
Delta
Deal found 2/9![Delta logo]()
$584
This JetBlue deal was found by Cheapflights users on 2/9. 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 3/611:59 pm
SJU
- LHR
1 stop18h 01m
JetBlue
Mon 3/1612:20 pm
LHR
- SJU
1 stop17h 05m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This JetBlue deal was found by Cheapflights users on 2/9. 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 3/911:10 am
SJU
- LHR
1 stop15h 45m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This Norse deal was found by Cheapflights users on 2/10. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
SJU
- LGW
1 stop24h 00m
Multiple Airlines
Mon 3/22:00 pm
LGW
- SJU
1 stop24h 17m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$750
This JetBlue deal was found by Cheapflights users on 2/9. 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 3/611:59 pm
SJU
- LHR
1 stop18h 01m
JetBlue
Tue 3/1712:20 pm
LHR
- SJU
1 stop17h 05m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/81:59 am
SJU
- LGW
2 stops28h 01m
Multiple Airlines
Mon 3/162:00 pm
LGW
- SJU
1 stop22h 53m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$772
This JetBlue deal was found by Cheapflights users on 2/9. 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.
Sat 3/75:05 am
SJU
- LHR
1 stop12h 55m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This TAP AIR PORTUGAL deal was found by Cheapflights users on 2/11. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:01 am
SJU
- LGW
2 stops23h 44m
TAP AIR PORTUGAL
Wed 4/2210:35 am
LGW
- SJU
2 stops21h 04m
TAP AIR PORTUGAL
Deal found 2/11![TAP AIR PORTUGAL logo]()
$966
This JetBlue deal was found by Cheapflights users on 2/10. 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.
Thu 3/55:01 am
SJU
- LHR
1 stop12h 39m
JetBlue
Mon 3/1612:20 pm
LHR
- SJU
1 stop18h 07m
JetBlue
Deal found 2/10![JetBlue logo]()
$607
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/63:19 pm
SJU
- LGW
1 stop14h 41m
Multiple Airlines
Mon 3/162:00 pm
LGW
- SJU
2 stops28h 17m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$813
This JetBlue deal was found by Cheapflights users on 2/11. 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.
Thu 3/511:59 pm
SJU
- LHR
1 stop16h 46m
JetBlue
Mon 3/99:20 am
LHR
- SJU
1 stop15h 36m
JetBlue
Deal found 2/11![JetBlue logo]()
$607
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:00 am
SJU
- LGW
1 stop24h 00m
Multiple Airlines
Tue 3/178:30 am
LGW
- SJU
2 stops20h 49m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1110:22 am
SJU
- LGW
2 stops20h 33m
Multiple Airlines
Thu 3/122:00 pm
LGW
- SJU
1 stop15h 58m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:19 pm
SJU
- LGW
1 stop14h 41m
Multiple Airlines
Fri 3/132:00 pm
LGW
- SJU
1 stop15h 58m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$843
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:57 am
SJU
- LGW
1 stop19h 03m
Multiple Airlines
Wed 3/188:30 am
LGW
- SJU
2 stops20h 49m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$871
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:15 am
SJU
- LGW
1 stop19h 05m
Multiple Airlines
Wed 4/222:00 pm
LGW
- SJU
1 stop23h 49m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$943
Last-minute flights from San Juan to LondonDiscover last-minute flight deals from San Juan to London. Data last updated February 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to London. Data last updated February 12, 2026 and is based on user searches.
This JetBlue deal was found by Cheapflights users on 2/9. 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.
Thu 3/52:25 pm
SJU
- LHR
1 stop12h 30m
JetBlue
Wed 3/187:25 am
LHR
- SJU
1 stop19h 26m
JetBlue
Deal found 2/9![JetBlue logo]()
$606
This JetBlue deal was found by Cheapflights users on 2/10. 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.
Thu 3/55:01 am
SJU
- LHR
1 stop12h 39m
JetBlue
Mon 3/1612:20 pm
LHR
- SJU
1 stop18h 07m
JetBlue
Deal found 2/10![JetBlue logo]()
$607
This JetBlue deal was found by Cheapflights users on 2/9. 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.
Thu 3/53:05 pm
SJU
- LHR
1 stop14h 25m
JetBlue
Sun 3/157:45 am
LHR
- SJU
1 stop19h 06m
JetBlue
Deal found 2/9![JetBlue logo]()
$626
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:57 am
SJU
- LGW
1 stop19h 03m
Multiple Airlines
Mon 3/162:00 pm
LGW
- SJU
2 stops28h 17m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$722
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/95:30 pm
SJU
- LHR
1 stop14h 10m
Delta
Mon 3/168:40 am
LHR
- SJU
2 stops19h 19m
Delta
Deal found 2/9![Delta logo]()
$584
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/99:15 am
SJU
- LHR
1 stop18h 15m
United Airlines
Mon 3/167:30 am
LHR
- SJU
2 stops17h 52m
United Airlines
Deal found 2/9![United Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/96:40 am
SJU
- LHR
1 stop20h 50m
United Airlines
Fri 3/208:00 am
LHR
- SJU
2 stops17h 22m
United Airlines
Deal found 2/9![United Airlines logo]()
$597
This JetBlue deal was found by Cheapflights users on 2/10. 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 3/911:10 am
SJU
- LHR
1 stop15h 45m
JetBlue
Mon 3/1612:20 pm
LHR
- SJU
1 stop17h 05m
JetBlue
Deal found 2/10![JetBlue logo]()
$627
This Delta deal was found by Cheapflights users on 2/10. 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 3/107:30 am
SJU
- LHR
1 stop21h 30m
Delta
Tue 3/1710:00 am
LHR
- SJU
2 stops17h 59m
Delta
Deal found 2/10![Delta logo]()
$585
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/107:05 am
SJU
- LHR
1 stop19h 35m
United Airlines
Wed 3/189:10 am
LHR
- SJU
2 stops16h 12m
United Airlines
Deal found 2/9![United Airlines logo]()
$611
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 3/117:30 am
SJU
- LHR
1 stop18h 25m
United Airlines
Wed 3/186:50 am
LHR
- SJU
2 stops18h 32m
United Airlines
Deal found 2/9![United Airlines logo]()
$578
This KLM deal was found by Cheapflights users on 2/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:44 pm
SJU
- LHR
1 stop15h 36m
KLM
Tue 4/711:15 am
LHR
- SJU
1 stop17h 00m
KLM
Deal found 2/9![KLM logo]()
$623
One-way flights from San Juan to LondonSearch for one-way flight options from San Juan to London. Find affordable one-way fares based on user searches. Data last updated February 12, 2026.
Search for one-way flight options from San Juan to London. Find affordable one-way fares based on user searches. Data last updated February 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/304:19 pm
SJU
- LGW
2 stops36h 41m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:21 am
SJU
- LGW
2 stops53h 54m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:21 am
SJU
- LHR
2 stops50h 49m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$320
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:25 am
SJU
- LHR
1 stop21h 05m
JetBlue
Deal found 2/10![JetBlue logo]()
$326
This Mytrip deal was found by Cheapflights users on 2/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:00 am
SJU
- LHR
3 stops24h 50m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 4/227:40 am
SJU
- LHR
1 stop18h 05m
United Airlines
Deal found 2/9![United Airlines logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/276:30 am
SJU
- LGW
1 stop23h 30m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$375
This JetBlue deal was found by Cheapflights users on 2/9. 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 3/61:44 pm
SJU
- LHR
1 stop15h 46m
JetBlue
Deal found 2/9![JetBlue logo]()
$376
This JetBlue deal was found by Cheapflights users on 2/9. 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 5/1712:00 pm
SJU
- LHR
1 stop16h 30m
JetBlue
Deal found 2/9![JetBlue logo]()
$395
This oojo deal was found by Cheapflights users on 2/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:10 am
SJU
- LHR
1 stop20h 45m
TAP AIR PORTUGAL
Deal found 2/12![TAP AIR PORTUGAL logo]()
$402
This Mytrip deal was found by Cheapflights users on 2/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2710:00 am
SJU
- LHR
2 stops19h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:54 pm
SJU
- LHR
3 stops33h 06m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$406
Find flight deals from San Juan to London
Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) 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 February 12, 2026.
Round-trip from | $578 (United Airlines) |
|---|---|
One-way from | $278 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $584 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Juan 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 2,558,603 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from San Juan to London that are best for you.
Fly from
San Juan
Fly to
London
Route
Depart
Return
Price
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Mon 3/9
7:30 am-6:25 am
1 stop18h 55m
London Heathrow
Tue 3/17
8:40 am-11:59 pm
2 stops19h 19m
$584
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 3/11
5:27 pm-10:15 am
1 stop12h 48m
London Heathrow
Mon 3/16
8:40 am-11:59 pm
2 stops19h 19m
$584
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 3/10
7:30 am-9:00 am
1 stop21h 30m
London Heathrow
Tue 3/17
6:30 am-11:59 pm
2 stops21h 29m
$584
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 3/5
2:25 pm-6:55 am
1 stop12h 30m
London Heathrow
Wed 3/18
7:25 am-10:51 pm
1 stop19h 26m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Mon 3/9
2:44 pm-9:00 am
1 stop14h 16m
London Heathrow
Mon 3/16
4:35 pm-12:07 pm
1 stop23h 32m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 3/10
4:15 am-9:40 pm
1 stop13h 25m
London Heathrow
Wed 3/18
7:25 am-10:51 pm
1 stop19h 26m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 3/6
11:59 pm-10:00 pm
1 stop18h 01m
London Heathrow
Mon 3/16
12:20 pm-1:25 am
1 stop17h 05m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Mon 3/9
11:10 am-6:55 am
1 stop15h 45m
London Heathrow
Wed 3/18
7:25 am-10:51 pm
1 stop19h 26m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 3/6
11:59 pm-10:00 pm
1 stop18h 01m
London Heathrow
Tue 3/17
12:20 pm-1:25 am
1 stop17h 05m
$606
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Sat 3/7
5:05 am-10:00 pm
1 stop12h 55m
London Heathrow
Wed 3/18
7:25 am-10:51 pm
1 stop19h 26m
$606
Showing 1-10 of 34 results
Best time to book a flight from San Juan to London
Have a flexible travel schedule? Discover the best time to fly to London from San Juan with our price prediction graph.
PR1-LON
SJU-LGW
SJU-LHR
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
PR1-LON
SJU-LGW
SJU-LHR
How far ahead should I book a flight from San Juan to London?
Use this chart to determine the optimal time to book a round-trip flight from San Juan to London. Price data was last updated on February 6, 2026.
The best time to book flights from San Juan to London is 15 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from San Juan to London?
Currently, September is the cheapest month in which you can book a flight from San Juan to London (average of $101). Flying from San Juan to London in June is currently the most expensive (average of $920). 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 London
Get insights into the airlines that provide service to London. 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 London. Reviews last updated February 12, 2026.
See what other customers who have flown with Delta, United Airlines, and American Airlines from San Juan to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Related info for your journey
Find useful and relevant information for your journey from San Juan to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsIlford
Croydon
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Hayes
Borehamwood
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Eastbourne
Sutton
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
London flight routes
Other flight options
Popular flights
Alternative routes for San Juan to London
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to London by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Juan to London by cabin class
Find flights from San Juan to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to London
Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 12, 2026.
San Juan and London flights
Browse other San Juan and London flight options. Last updated on February 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from San Juan to London
Discover the top 5 airlines that operate flights from San Juan to London. 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 February 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$101 | Average$864 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$584 | Average$711 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$600 | Average$799 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$605 | Average$997 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$652 | Average$794 | FlexibilityNo cancel fee | On-timeN/A |