$307+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
Jun 16 — Jun 231
Round-trip
1 adult, Economy
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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 May 17, 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 May 17, 2026.
This Delta deal was found by Cheapflights users on 5/16. 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 11/37:30 am
SJU
- LHR
1 stop18h 55m
Delta
Fri 11/136:30 am
LHR
- SJU
2 stops21h 25m
Delta
Deal found 5/16![Delta logo]()
$814
This Delta deal was found by Cheapflights users on 5/16. 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 11/36:43 pm
SJU
- LHR
1 stop12h 57m
Delta
Tue 11/108:40 am
LHR
- SJU
2 stops19h 15m
Delta
Deal found 5/16![Delta logo]()
$815
This Delta deal was found by Cheapflights users on 5/16. 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 11/32:06 pm
SJU
- LHR
1 stop15h 14m
Delta
Thu 11/128:55 am
LHR
- SJU
2 stops19h 00m
Delta
Deal found 5/16![Delta logo]()
$821
This United Airlines deal was found by Cheapflights users on 5/16. 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 11/187:45 am
SJU
- LHR
1 stop19h 45m
United Airlines
Fri 11/276:50 am
LHR
- SJU
2 stops21h 46m
United Airlines
Deal found 5/16![United Airlines logo]()
$823
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Sun 11/17:45 am
SJU
- LHR
1 stop22h 30m
United Airlines
Wed 11/117:30 am
LHR
- SJU
2 stops21h 06m
United Airlines
Deal found 5/16![United Airlines logo]()
$825
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:55 pm
SJU
- LHR
1 stop12h 45m
United Airlines
Wed 8/267:30 am
LHR
- SJU
2 stops21h 20m
United Airlines
Deal found 5/12![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Sun 8/234:55 pm
SJU
- LHR
1 stop33h 00m
United Airlines
Mon 8/315:50 pm
LHR
- SJU
2 stops35h 00m
United Airlines
Deal found 5/13![United Airlines logo]()
$838
This United Airlines deal was found by Cheapflights users on 5/16. 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 11/25:50 pm
SJU
- LHR
1 stop13h 00m
United Airlines
Tue 11/1012:05 pm
LHR
- SJU
1 stop14h 17m
United Airlines
Deal found 5/16![United Airlines logo]()
$843
This Iberia deal was found by Cheapflights users on 5/15. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:15 pm
SJU
- LGW
1 stop12h 35m
Iberia
Mon 9/2811:30 am
LGW
- SJU
1 stop12h 20m
Iberia
Deal found 5/15![Iberia logo]()
$901
This British Airways deal was found by Cheapflights users on 5/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:15 pm
SJU
- LGW
1 stop12h 35m
British Airways
Mon 9/2811:30 am
LGW
- SJU
1 stop12h 20m
British Airways
Deal found 5/16![British Airways logo]()
$908
This FlightHub deal was found by Cheapflights users on 5/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:30 am
SJU
- LGW
1 stop20h 05m
JetBlue
Fri 8/2812:20 pm
LGW
- SJU
1 stop18h 35m
JetBlue
Deal found 5/15![JetBlue logo]()
$921
This Trip.com deal was found by Cheapflights users on 5/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/128:40 pm
SJU
- LGW
1 stop18h 20m
Iberia
Thu 6/188:40 pm
LGW
- SJU
1 stop23h 45m
Iberia
Deal found 5/14![Iberia logo]()
$928
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 May 17, 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 May 17, 2026.
This United Airlines deal was found by Cheapflights users on 5/16. 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 8/194:55 pm
SJU
- LHR
1 stop12h 45m
United Airlines
Sun 8/237:30 am
LHR
- SJU
2 stops21h 20m
United Airlines
Deal found 5/16![United Airlines logo]()
$879
This KLM deal was found by Cheapflights users on 5/13. 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 8/192:59 pm
SJU
- LHR
1 stop15h 21m
KLM
Sun 8/239:20 am
LHR
- SJU
1 stop18h 09m
KLM
Deal found 5/13![KLM logo]()
$899
This British Airways deal was found by Cheapflights users on 5/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:15 pm
SJU
- LGW
1 stop12h 35m
British Airways
Mon 9/2811:30 am
LGW
- SJU
1 stop12h 20m
British Airways
Deal found 5/16![British Airways logo]()
$908
This JetBlue deal was found by Cheapflights users on 5/13. 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 8/144:55 pm
SJU
- LGW
1 stop11h 40m
JetBlue
Fri 8/2812:20 pm
LGW
- SJU
1 stop18h 35m
JetBlue
Deal found 5/13![JetBlue logo]()
$954
This Delta deal was found by Cheapflights users on 5/16. 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.
Fri 7/242:21 pm
SJU
- LHR
2 stops17h 54m
Delta
Fri 8/143:15 pm
LHR
- SJU
2 stops26h 40m
Delta
Deal found 5/16![Delta logo]()
$976
This Air Europa deal was found by Cheapflights users on 5/15. 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 Air Europa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:32 pm
SJU
- LGW
2 stops21h 53m
Multiple Airlines
Mon 9/2810:00 am
LGW
- SJU
2 stops31h 13m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$1,129
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/14. 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.
Fri 9/256:00 am
SJU
- LGW
2 stops22h 45m
TAP AIR PORTUGAL
Sun 10/1812:05 pm
LGW
- SJU
2 stops30h 03m
TAP AIR PORTUGAL
Deal found 5/14![TAP AIR PORTUGAL logo]()
$1,155
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Thu 8/131:00 am
SJU
- LHR
1 stop15h 25m
United Airlines
Fri 8/287:30 am
LHR
- SJU
2 stops21h 20m
United Airlines
Deal found 5/13![United Airlines logo]()
$881
This KLM deal was found by Cheapflights users on 5/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:46 pm
SJU
- LHR
1 stop17h 54m
KLM
Tue 11/1011:55 am
LHR
- SJU
1 stop16h 00m
KLM
Deal found 5/12![KLM logo]()
$899
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Thu 9/247:00 am
SJU
- LHR
1 stop23h 35m
United Airlines
Mon 9/286:50 am
LHR
- SJU
2 stops22h 00m
United Airlines
Deal found 5/16![United Airlines logo]()
$912
This KLM deal was found by Cheapflights users on 5/15. 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.
Fri 9/111:32 pm
SJU
- LHR
1 stop15h 48m
KLM
Sun 9/2011:45 am
LHR
- SJU
1 stop16h 59m
KLM
Deal found 5/15![KLM logo]()
$942
This JetBlue deal was found by Cheapflights users on 5/14. 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 8/194:55 pm
SJU
- LGW
1 stop11h 40m
JetBlue
Sun 8/2312:20 pm
LGW
- SJU
1 stop18h 17m
JetBlue
Deal found 5/14![JetBlue logo]()
$1,050
This KLM deal was found by Cheapflights users on 5/13. 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.
Thu 11/51:46 pm
SJU
- LHR
1 stop15h 14m
KLM
Mon 11/912:30 pm
LHR
- SJU
1 stop14h 43m
KLM
Deal found 5/13![KLM logo]()
$943
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:45 pm
SJU
- LHR
1 stop20h 55m
United Airlines
Sun 9/67:45 am
LHR
- SJU
1 stop21h 05m
United Airlines
Deal found 5/12![United Airlines logo]()
$955
This JetBlue deal was found by Cheapflights users on 5/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:55 pm
SJU
- LGW
1 stop11h 40m
JetBlue
Mon 8/1712:20 pm
LGW
- SJU
1 stop18h 17m
JetBlue
Deal found 5/12![JetBlue logo]()
$1,070
This Turkish Airlines deal was found by Cheapflights users on 5/16. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:00 pm
SJU
- LGW
2 stops22h 35m
Multiple Airlines
Sat 11/75:05 pm
LGW
- SJU
2 stops31h 40m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$1,177
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/15. 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.
Thu 11/511:45 am
SJU
- LGW
2 stops24h 05m
TAP AIR PORTUGAL
Tue 11/1010:40 am
LGW
- SJU
2 stops29h 43m
TAP AIR PORTUGAL
Deal found 5/15![TAP AIR PORTUGAL logo]()
$1,206
This Turkish Airlines deal was found by Cheapflights users on 5/17. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:00 pm
SJU
- LGW
2 stops22h 45m
Multiple Airlines
Sun 9/205:35 pm
LGW
- SJU
2 stops30h 57m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$1,202
Last-minute flights from San Juan to LondonDiscover last-minute flight deals from San Juan to London. Data last updated May 17, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to London. Data last updated May 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Thu 5/141:00 am
SJU
- LHR
1 stop14h 40m
United Airlines
Sun 5/316:00 pm
LHR
- SJU
2 stops23h 34m
United Airlines
Deal found 5/14![United Airlines logo]()
$993
This KLM deal was found by Cheapflights users on 5/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:43 pm
SJU
- LHR
1 stop14h 32m
KLM
Sun 5/318:05 pm
LHR
- SJU
1 stop32h 30m
KLM
Deal found 5/12![KLM logo]()
$994
This Delta deal was found by Cheapflights users on 5/13. 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.
Fri 5/152:35 pm
SJU
- LHR
2 stops17h 30m
Delta
Sun 5/318:05 pm
LHR
- SJU
1 stop20h 55m
Delta
Deal found 5/13![Delta logo]()
$1,007
This KLM deal was found by Cheapflights users on 5/16. 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.
Sat 5/164:10 pm
SJU
- LHR
1 stop15h 55m
KLM
Sat 5/2311:15 am
LHR
- SJU
1 stop14h 15m
KLM
Deal found 5/16![KLM logo]()
$1,001
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 5/164:55 pm
SJU
- LHR
2 stops32h 35m
United Airlines
Sat 5/234:40 pm
LHR
- SJU
1 stop33h 44m
United Airlines
Deal found 5/16![United Airlines logo]()
$1,004
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 5/237:40 am
SJU
- LHR
1 stop19h 50m
United Airlines
Fri 8/217:30 am
LHR
- SJU
2 stops21h 20m
United Airlines
Deal found 5/16![United Airlines logo]()
$1,009
This Trip.com deal was found by Cheapflights users on 5/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:25 pm
SJU
- LHR
1 stop19h 50m
Iberia
Wed 6/1710:50 am
LHR
- SJU
1 stop13h 00m
Iberia
Deal found 5/13![Iberia logo]()
$917
This Iberia deal was found by Cheapflights users on 5/16. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:40 pm
SJU
- LGW
1 stop18h 20m
Iberia
Wed 6/1711:30 am
LGW
- SJU
1 stop12h 20m
Iberia
Deal found 5/16![Iberia logo]()
$1,025
This Trip.com deal was found by Cheapflights users on 5/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:40 pm
SJU
- LGW
1 stop18h 20m
Iberia
Thu 6/188:40 pm
LGW
- SJU
1 stop23h 45m
Iberia
Deal found 5/12![Iberia logo]()
$930
This Trip.com deal was found by Cheapflights users on 5/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:40 pm
SJU
- LHR
1 stop14h 40m
Iberia
Thu 6/186:45 pm
LHR
- SJU
1 stop25h 40m
Iberia
Deal found 5/12![Iberia logo]()
$931
This Trip.com deal was found by Cheapflights users on 5/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/128:40 pm
SJU
- LGW
1 stop18h 20m
Iberia
Thu 6/188:40 pm
LGW
- SJU
1 stop23h 45m
Iberia
Deal found 5/14![Iberia logo]()
$928
This Trip.com deal was found by Cheapflights users on 5/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/128:40 pm
SJU
- LHR
1 stop14h 40m
Iberia
Thu 6/187:10 pm
LHR
- SJU
1 stop25h 15m
Iberia
Deal found 5/14![Iberia logo]()
$930
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 May 17, 2026.
Search for one-way flight options from San Juan to London. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
This United Airlines deal was found by Cheapflights users on 5/13. 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 10/51:25 pm
SJU
- LHR
2 stops16h 15m
United Airlines
Deal found 5/13![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am
SJU
- LHR
2 stops21h 45m
Delta
Deal found 5/12![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 5/16. 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 9/17:00 am
SJU
- LGW
2 stops21h 25m
Delta
Deal found 5/16![Delta logo]()
$316
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 9/124:55 pm
SJU
- LHR
1 stop33h 00m
United Airlines
Deal found 5/16![United Airlines logo]()
$317
This KLM deal was found by Cheapflights users on 5/16. 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.
Thu 9/31:35 pm
SJU
- LHR
1 stop14h 15m
KLM
Deal found 5/16![KLM logo]()
$361
This Delta deal was found by Cheapflights users on 5/16. 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.
Fri 9/41:35 pm
SJU
- LGW
2 stops21h 25m
Delta
Deal found 5/16![Delta logo]()
$366
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Fri 7/171:00 am
SJU
- LHR
1 stop15h 25m
United Airlines
Deal found 5/15![United Airlines logo]()
$375
This Delta deal was found by Cheapflights users on 5/15. 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 7/282:21 pm
SJU
- LHR
2 stops16h 44m
Delta
Deal found 5/15![Delta logo]()
$381
This Priceline deal was found by Cheapflights users on 5/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
SJU
- LGW
1 stop22h 35m
JetBlue
Deal found 5/12![JetBlue logo]()
$381
This Justfly.com deal was found by Cheapflights users on 5/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:30 am
SJU
- LGW
1 stop20h 05m
JetBlue
Deal found 5/12![JetBlue logo]()
$384
This Delta deal was found by Cheapflights users on 5/16. 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.
Thu 9/31:35 pm
SJU
- LGW
2 stops21h 25m
Delta
Deal found 5/16![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 5/15. 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 11/27:30 am
SJU
- LHR
2 stops19h 25m
Delta
Deal found 5/15![Delta logo]()
$392
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 May 17, 2026.
Round-trip from | $814 (Delta) |
|---|---|
One-way from | $307 (United Airlines) |
Popular in | June |
Cheapest in | February |
Average price | $842 |
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 May 17, 2026.
Use the filters below to find and compare flights from San Juan to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 8/19
4:55 pm-10:40 am
1 stop12h 45m
London Heathrow
Sun 8/23
7:30 am-11:50 pm
2 stops21h 20m
$879
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 8/13
1:00 am-9:25 pm
1 stop15h 25m
London Heathrow
Fri 8/28
7:30 am-11:50 pm
2 stops21h 20m
$881
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 8/19
2:59 pm-11:20 am
1 stop15h 21m
London Heathrow
Sun 8/23
9:20 am-10:29 pm
1 stop18h 09m
$899
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 11/5
1:46 pm-11:40 am
1 stop17h 54m
London Heathrow
Tue 11/10
11:55 am-11:55 pm
1 stop16h 00m
$899
Quickest round-trip
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Thu 9/24
5:15 pm-10:50 am
1 stop12h 35m
London Gatwick
Mon 9/28
11:30 am-6:50 pm
1 stop12h 20m
$908
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 9/24
7:00 am-11:35 am
1 stop23h 35m
London Heathrow
Mon 9/28
6:50 am-11:50 pm
2 stops22h 00m
$912
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 9/11
1:32 pm-10:20 am
1 stop15h 48m
London Heathrow
Sun 9/20
11:45 am-11:44 pm
1 stop16h 59m
$942
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 11/5
1:46 pm-9:00 am
1 stop15h 14m
London Heathrow
Mon 11/9
12:30 pm-11:13 pm
1 stop14h 43m
$943
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Fri 8/14
4:55 pm-9:35 am
1 stop11h 40m
London Gatwick
Fri 8/28
12:20 pm-1:55 am
1 stop18h 35m
$954
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Sat 8/29
6:45 pm-8:40 pm
1 stop20h 55m
London Heathrow
Sun 9/6
7:45 am-11:50 pm
1 stop21h 05m
$955
Showing 1-10 of 39 resultsSorted by cheapest first
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-LHR
SJU-LGW
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-LHR
SJU-LGW
How far ahead should I book a flight from San Juan to London?
The best time to book flights from San Juan to London is 82 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, February 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 $817). 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.
How much does it cost to fly round-trip from San Juan to London?
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 May 17, 2026.
See what other customers who have flown with Delta,United Airlines, andJetBlue 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.
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Dorking
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Borehamwood
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
Sutton
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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 May 17, 2026.
San Juan and London flights
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Top 4 airlines flying from San Juan to London
Discover the top 4 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 May 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$101 | Average$865 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$551 | Average$817 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$584 | Average$859 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$605 | Average$941 | FlexibilityNo cancel fee | On-time71% |