San Juan SJU to London Heathrow Airport LHR Flights

The cheapest month to travel from San Juan to London Heathrow Airport (LHR) by plane is December.

Since neither San Juan nor London Heathrow Airport (LHR) are in the Schengen Area, passport requirements depend on the specific immigration rules of Puerto Rico and United Kingdom. Entry and visa requirements can be subject to change. For the latest information, check with your destination's embassy or consulate.

There is a time difference of 4 h in winter and 5 h in summer between San Juan and London Heathrow Airport (LHR).

The best events to attend in London Heathrow Airport (LHR) include:

• Notting Hill Carnival, a colorful celebration of Caribbean culture with parades and music
• London Fashion Week, a major event showcasing the latest trends in fashion
• The Thames Festival, a riverside festival featuring arts, music, and food along the Thames
• New Year's Day Parade, a grand parade featuring marching bands and performers to ring in the new year.

The best holidays to experience in London Heathrow Airport (LHR) include:

• Easter, mild spring weather and blooming flowers
• May Bank Holiday, pleasant temperatures and outdoor activities
• Late Summer Bank Holiday, warm weather perfect for exploring parks and attractions
• Christmas, festive decorations and holiday spirit throughout the city.

The best seasons to visit London Heathrow Airport (LHR) are Spring or Summer. The best weather to explore London Heathrow Airport (LHR) is during May-June or September-October.

For international flights we recommend to arrive 2.5 to 3 hours before departure. Please check the website of your departure airport if in doubt. Some airports may offer booking time slots for security checks or offer additional information on when to get there based on time of day.

Most airlines permit carry-on bags that fit within specific dimensions (e. G. 22 x 14 x 9 inches or 56 x 36 x 23 cm), including handles and wheels. Bags must fit in the overhead bin or under the seat in front of you.

Many airlines impose weight limits, commonly ranging between 7 kg (15 lbs) and 12 kg (26 lbs).
Typically, passengers are allowed one carry-on bag and one personal item (for example a purse, laptop bag, or backpack). Personal items must fit under the seat in front of you.
Budget Airlines (like Ryanair or Wizz Air) have stricter size and weight limits, often requiring fees for larger carry-ons. Full-Service Airlines have more lenient policies, sometimes including more spacious dimensions or higher weight limits depending on your ticket class.

The list of items prohibited on an airplane varies by country and airline, but in general, the following items are not allowed in carry-on or checked baggage: Weapons and self-defence items, sharp objects, flammable materials, explosives, toxic substances, or liquids over 100ml (except for medications and baby essentials). In checked baggage, firearms (without authorization), explosives, large lithium batteries, and hazardous chemicals are prohibited. Electronic cigarettes must be in carry-on bags, while alcohol and dry ice have restrictions. Always check with your airline for specific regulations.