iDiscover the best prices by selecting your travel dates.
British Airways
BA 7069
→ Outbound · 26 Sep
LHR
London Heathrow
SJU
San Juan
11:30 AM
26 Sep
12h 15m
6:45 PM
26 Sep
← Return · 6 Oct
SJU
San Juan Marin
LHR
London Heathrow
12:21 PM
6 Oct
13h 34m
6:55 AM
7 Oct
from
£1031
Return · per adult
Avianca
AV 121
→ Outbound · 7 Nov
LHR
London Heathrow
SJU
San Juan
9:35 PM
7 Nov
23h 20m
4:55 PM
8 Nov
← Return · 17 Nov
SJU
San Juan Marin
LHR
London Heathrow
12:50 PM
17 Nov
21h 45m
2:35 PM
18 Nov
from
£995
Return · per adult
United Airlines
UA 921
→ Outbound · 19 Dec
LHR
London Heathrow
SJU
San Juan
6:00 PM
19 Dec
21h 50m
11:50 AM
20 Dec
← Return · 29 Dec
SJU
San Juan Marin
LHR
London Heathrow
8:25 AM
29 Dec
17h 30m
5:55 AM
30 Dec
from
£1417
Return · per adult
Virgin Atlantic
VS 6655
→ Outbound · 30 Jan
LHR
London Heathrow
SJU
San Juan
7:20 PM
30 Jan
32h 35m
11:55 PM
31 Jan
← Return · 9 Feb
SJU
San Juan Marin
LHR
London Heathrow
2:15 PM
9 Feb
16h 15m
10:30 AM
10 Feb
from
£1066
Return · per adult
Virgin Atlantic
VS 4007
→ Outbound · 27 Sep
LHR
London Heathrow
SJU
San Juan
11:45 AM
27 Sep
17h 04m
11:49 PM
27 Sep
← Return · 7 Oct
SJU
San Juan Marin
LHR
London Heathrow
6:45 AM
7 Oct
18h 35m
6:20 AM
8 Oct
from
£1068
Return · per adult
American Airlines
AA 6754
→ Outbound · 8 Nov
LHR
London Heathrow
SJU
San Juan
4:05 PM
8 Nov
28h 35m
4:40 PM
9 Nov
← Return · 18 Nov
SJU
San Juan Marin
LHR
London Heathrow
8:30 AM
18 Nov
19h 20m
7:50 AM
19 Nov
from
£1040
Return · per adult
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Popular airlines to San Juan
Top 7 airlines flying from London to San Juan
Cheapest and average return economy fares by carrier, from our sampled live searches. Fares change constantly — tap Search to see live prices for your dates.
| Airline | Cheapest | Average | Flights | Search |
|---|---|---|---|---|
| Avianca | £760 | £1040 | With stops | |
 Aer Lingus | £852 | £947 | With stops | |
| British Airways | £988 | £1824 | With stops | |
| Virgin Atlantic | £1024 | £1355 | With stops | |
| American Airlines | £1080 | £1098 | With stops | |
 Lufthansa | £1112 | £1112 | With stops | |
| United Airlines | £1997 | £1997 | With stops |
Everything you should know
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We search live fares to find you the best deal.
We hope you love your trip to San Juan!
Insights & trends for London to San Juan flights
Data-powered insights to help you find the cheapest flights, the best time to fly and much more.
How much is a return flight from London to San Juan?
Return flights from London to San Juan typically cost between £763 and £1198 in August, though fares move with demand, season and how early you book. The lowest fare our search found recently was £760 — a great price and well below the usual range, so a price near this is worth grabbing. Keeping your dates flexible and comparing nearby days is the easiest way to land at the cheaper end.
What is the cheapest day to fly to San Juan?
indicativeThe cheapest day to depart to San Juan is usually Monday, when fares start from around £760 — midweek departures tend to be quieter and cheaper. Sunday is typically the most expensive day to fly out (around £1040), as weekend travel is popular with leisure and business travellers alike. Where your plans allow, moving your outbound to a cheaper weekday can noticeably lower the total fare.
What is the cheapest time of day to fly to San Juan?
Flights to San Juan are generally cheapest departing in the evening, with fares from around £760. Departures in the morning tend to cost more (about £852), as those slots are more convenient and in higher demand. Picking an off-peak departure time is a simple way to trim the price without changing your dates.
What is the cheapest London airport to fly to San Juan from?
The cheapest return flights to San Juan depart from London Heathrow (LHR), from around £1054. London has several airports serving this route and fares can vary between them — Gatwick (LGW) is often the priciest at around £1060. It's worth checking which London airport is both cheapest and most convenient for you before booking.
Average return fare to San Juan by month
The cheapest month to fly from London to San Juan is typically March, with return economy fares from £760. Fares are usually highest in August (around £1987). Figures are indicative, from sampled live fares, and change with demand.
Cheapest sampled return economy fare, London to San Juan, per month. Search live for exact prices.
When to book flights from London to San Juan
Are your dates flexible? These are the ideal times to fly to San Juan based on our flight data — find the cheapest days for a 7-day trip.
Cheap flights to San Juan from across the UK
You don't have to fly from London. The cheapest UK departure for San Juan is currently Manchester from £852. Compare return economy fares and typical flight times below — figures are indicative from sampled fares.
Indicative cheapest return economy fares by UK origin. Pick your dates in the search form above.
Weather in San Juan
Monday
Light rain
26°C
31/08/2026
Tuesday
Thunderstorm
30°C
01/09/2026
Wednesday
Thunderstorm
29°C
02/09/2026
Thursday
Thunderstorm
29°C
03/09/2026
Friday
Drizzle
29°C
04/09/2026
Saturday
Thunderstorm
29°C
05/09/2026
Sunday
Drizzle
29°C
06/09/2026
Powered by Open-Meteo.com
Reviews of airlines servicing San Juan
See what customers who have flown with American Airlines, United, Lufthansa and more to San Juan have to say. Each airline is scored on boarding, crew, food, comfort and entertainment.
American Airlines
1,124 reviews
United
900 reviews
Lufthansa
1,100 reviews
British Airways
8,148 reviews
American Airlines
8.8Very goodMy trip with American Airlines was smooth from start to finish. The staff were courteous, the boarding process was organized, and the flight itself was comfortable. Overall, a very positive experience.
Our travel experts
Sarah Thompson
Expert on British Airways
Sarah Thompson specialises in British Airways travel, helping customers choose the right routes, schedules, and flight options. With a focus on smooth and stress-free journeys, she makes planning international travel simple and convenient.
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Isabella
Expert on Lufthansa
Isabella is a Lufthansa travel specialist with a keen eye for European and international flight options. She helps travellers plan smooth journeys by finding practical routes and connections tailored to their travel needs.
Read moreGood to know — flights from London to San Juan
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Popular flights to San Juan
About flights to San Juan
Overview
San Juan, the vibrant capital of Puerto Rico, pairs 500-year-old Spanish forts and pastel colonial streets with palm-lined beaches and lively Caribbean rhythm. As a US territory with a distinctly Latin soul, it is a favourite for UK travellers seeking sun, history and easy island-hopping — served by Luis Muñoz Marín International Airport (SJU). Comparing fares in one place makes finding the right flight to San Juan quick and simple.
Best time to fly to San Juan
San Juan is warm and tropical all year. The drier, most pleasant season runs from December to April, which is also the busiest winter-sun period. The wetter, more humid months fall between May and November, overlapping the Atlantic hurricane season. Fares usually ease outside the Christmas and Easter peaks, so travelling in the shoulder weeks stretches your budget further — check the price charts on this page for your dates.
Airlines and routes
There are no direct flights from the UK to San Juan, so journeys connect via a hub. Because Puerto Rico is a US territory, most routes run through the United States with American Airlines (via Miami or New York), United (via Newark) and Delta (via Atlanta) — note these require a US ESTA even in transit. European one-stop options include Iberia and Air Europa via Madrid. Expect a total journey of around 12–15 hours from London or Manchester. Comparing carriers for your exact dates is the surest way to secure the lowest fare.
Things to do in San Juan
San Juan blends deep history with beachside relaxation:
- Old San Juan: a UNESCO-listed quarter of cobbled streets and colourful facades.
- Castillo San Felipe del Morro: a dramatic 16th-century clifftop fortress guarding the bay.
- Condado Beach: a lively urban stretch of golden sand and ocean-front dining.
- La Fortaleza: the historic governor's mansion and one of the oldest in the Americas.
- Bacardí Distillery: a short ferry ride away for tours and rum tastings.
At Luis Muñoz Marín International Airport (SJU)
SJU is the Caribbean's busiest airport, about 13 km east of Old San Juan. Facilities include duty-free shopping, currency exchange, ATMs, lounges and dining. Official taxis with fixed zone fares, ride-hailing apps and hotel shuttles are all available just outside the terminal.
Top tips for finding cheap flights to San Juan
- Book roughly 2–4 months ahead — Caribbean fares rise close to departure.
- Avoid the December and Easter peaks; the shoulder weeks are noticeably cheaper.
- Be flexible with dates — midweek departures often beat weekend prices.
- Compare US and European hubs; each can be cheaper depending on your dates.
Travel essentials
- Puerto Rico is a US territory, so most routes require a valid US ESTA even if only connecting in the United States.
- UK passport holders do not need a separate visa for a tourist visit under the US Visa Waiver Programme.
- The local currency is the US dollar (USD).
Baggage & hand-luggage allowance for flights to San Juan
Your allowance to San Juan depends on the airline and the fare you book. The table below shows typical long-haul allowances so you know roughly what to expect — always confirm the exact limits with your airline before you fly.
| Fare type | Hand baggage | Checked baggage |
|---|---|---|
| Basic / Light economy | 1 small under-seat bag | Usually none — add for a fee |
| Standard economy | 1 cabin bag + 1 personal item | Typically 1 × 23 kg |
| Premium economy | 1–2 cabin bags + personal item | Typically 2 × 23 kg |
| Business / First | 2 cabin bags + personal item | Typically 2 × 32 kg |
Indicative only. Allowances vary by airline, route and fare — always check your airline's baggage policy.
Packing & baggage tips
- Full-service carriers (e.g. British Airways, Turkish Airlines, KLM) usually include a checked bag on long-haul economy fares; basic/low-cost fares often don't.
- Cabin (hand) bag size is commonly around 56 × 45 × 25 cm — confirm your airline's limit before you pack.
- Liquids in hand luggage must be in containers of 100 ml or less, inside one clear resealable bag.
- Weigh your bags at home — airport excess-baggage fees are far higher than pre-booked allowances.
- Extra or heavier bags are almost always cheaper added online in advance than at the airport.
FAQs — booking San Juan flights
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