London LON to Siem Reap REP Flights

Cheap plane tickets from London to Siem Reap can start from as little as $772 (€620) when you book in advance. The average flight ticket price for London to Siem Reap is $781 (€628) ; however, prices vary depending on the time of day and class and they tend to be more expensive on the day.

The average journey time by plane from London to Siem Reap is 21h 0m to travel the 6081 miles (9788 km) long route. Journey times can vary on weekends and holidays, so use our Journey Planner to search for a specific date.

The earliest flight from London to Siem Reap leaves at 5:30 AM. Plan your trip with the Journey Planner from Omio.

The latest flight from London to Siem Reap leaves at 8:25 PM.

The cheapest month for a flight from London to Siem Reap is January.

Yes, you can take a flight between London and Siem Reap.

Since neither London nor Siem Reap are in the Schengen Area, passport requirements depend on the specific immigration rules of United Kingdom and Cambodia. 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 7 h in winter and 6 h in summer between London and Siem Reap.

The best events to attend in Siem Reap include:

• Angkor Wat International Half Marathon, a unique race that takes participants through the stunning temples of Angkor Wat
• Bon Om Touk (Water Festival), a vibrant celebration marking the end of the rainy season with boat races and cultural performances
• Khmer New Year, a festive three-day celebration filled with traditional games, dances, and family gatherings.

The best holidays to experience in Siem Reap include:

• Khmer New Year, vibrant cultural celebrations with traditional games and festivities
• Pchum Ben, a unique opportunity to experience local customs and pay respects to ancestors
• Water Festival, spectacular boat races and lively street celebrations.

The best season to visit Siem Reap is Dry season or November to March. The best weather to explore Siem Reap is during November-February.

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.

The official currency in Cambodia is the Cambodian Riel (KHR), but the US dollar is widely accepted and commonly used. Travelers often find it convenient to use cash, especially in markets and smaller establishments, while cards are accepted in larger hotels and some restaurants in urban areas. Carrying both cash and card is recommended for flexibility.

In Siem Reap, travelers should be cautious of tuk-tuk drivers overcharging or taking longer routes, as well as scams involving inflated prices for temple entry tickets or guided tours. Petty theft, such as pickpocketing in crowded areas, can occur. It's advisable to use reputable transportation services and confirm prices upfront to avoid common scams. Additionally, travelers should stay aware of their belongings, especially near popular sites like Angkor Wat.

Pack lightweight, versatile clothing suitable for the destination's climate, and use secure, lockable luggage to protect belongings. Keep essential items like travel documents, medication, and valuables in a carry-on bag for easy access. Use packing organizers or cubes to maximize space and maintain order. Lastly, include a small first aid kit and personal hygiene items for added comfort during travel.