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Finnair flights from London to San Juan Luis Munoz Marin Intl Airport (LON - SJU)

LON — SJU
23 Jan — 30 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from London to San Juan on Finnair typically fly into San Juan Luis Munoz Marin Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from London to Luis Munoz Marin Intl in 2025

Find detailed information about Finnair flights from London to Luis Munoz Marin Intl. Explore the options provided by Finnair to plan your journey from London to Luis Munoz Marin Intl. Data last updated 24 December 2025.

Return from

£867

Popular in

December

Cheapest in

September

Average price (all airlines)

£943
Finnair
  • Finnair
  • 30/1-9/2
  • 4 total stops
  • 55h 50m total
  • London to San Juan
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Highest demand for flights from London to San Juan Luis Munoz Marin Intl; 5% potential price increase.
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Best time to find cheap flights from London to San Juan Luis Munoz Marin Intl; 3% potential price drop.
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Average price for all London to San Juan Luis Munoz Marin Intl flights (one-way and round-trip).
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  • How do most travelers feel about Finnair?

    The average rating from 1,339 Finnair reviews by Cheapflights users is 7.6 (out of a maximum rating of 10). If you are considering flying LON-SJU with Cheapflights, apply your desired dates to the form above to see our best pricing for your trip to San Juan Luis Munoz Marin Intl Airport with Finnair.

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Cheapest Finnair flights from London to Luis Munoz Marin Intl
Explore the most affordable Finnair flight options available from London to Luis Munoz Marin Intl. Find the lowest fares with prices last updated on 24 December 2025.

Fri 30/111:45LHR - SJU
2 stops40h 14mFinnair
Wed 4/213:24SJU - LHR
1 stop15h 11mFinnair
Deal found 23/12£867
Tue 30/1211:45LHR - SJU
2 stops39h 49mFinnair
Sat 10/114:31SJU - LHR
2 stops59h 49mFinnair
Deal found 22/12£880
Fri 30/114:45LHR - SJU
2 stops37h 14mFinnair
Sat 7/213:24SJU - LHR
1 stop15h 11mFinnair
Deal found 23/12£897

Travel insights for Finnair flights from London to Luis Munoz Marin Intl

Get recent, data-driven insights about Finnair flights from London to Luis Munoz Marin Intl including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London to San Juan Luis Munoz Marin Intl Airport with Finnair?

Currently, the most affordable month to book a Finnair flight from London to San Juan Luis Munoz Marin Intl Airport in November, with an average price of £425. Conversely, traveling with Finnair from London to San Juan Luis Munoz Marin Intl Airport in August will be the most expensive, with an average cost of £765. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Rainfall in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 55.0 mm.

Temperature in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

Best time to book a flight from London to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from London with our price prediction graph.
Estimated return 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.

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Fly from London to Luis Munoz Marin Intl on another airline

Consider alternative airlines that service the Luis Munoz Marin Intl area. Flight routes are based on user searches made on Cheapflights and were last updated on 24 December 2025.
JetBlue flights from London to San Juan Luis Munoz Marin Intl

See what others are saying about Finnair

Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 24 December 2025.
Finnair
7.6
Good
1,339 reviews
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Overview

Boarding

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.1

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