LHR - REP

Find Cheap Flights from London Heathrow Airport to Siem Reap

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Economy
London (LHR)
Siem Reap
Thu 21/11
Thu 28/11
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London Heathrow Airport to Siem Reap flight information

Flights arrive in Siem Reap
Flights depart from London Heathrow Airport
Flight price £516
Distance 6,091 miles
Airlines Vietnam Airlines, Singapore Airlines, British Airways, Cathay Pacific

Good to know

Low season:
September
Best time to beat the crowds
4%
expected price decrease
High season:
December
Most popular time to fly
4%
expected price increase
Average price:
£717
(avg. price over the last 2 weeks)
Good deal:
£547
or less (return)

When to Book Flights from London Heathrow to Siem Reap

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £546 or less.
The cheapest flight from London Heathrow Airport to Siem Reap was found, on average, 88 days before departure.
Book at least 5 weeks before departure in order to get a below-average price.
Morning departure is around 18% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking London Heathrow Airport to Siem Reap Flights

How long does a flight from London Heathrow Airport to Siem Reap take?
There are no direct flights for this route listed on KAYAK, the shortest multi-flight duration is 14h 20m.
Which airlines provide the cheapest flights from London Heathrow Airport to Siem Reap?
In the past 3 days, the cheapest return tickets were found on Vietnam Airlines (£516), Singapore Airlines (£553) and British Airways (£614).
How does KAYAK find such low flight prices?
KAYAK processes over 2 billion travel queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.
How can Hacker Fares save me money?
Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.
Does KAYAK query more flight providers than competitors?
Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.

Book cheap flights from London Heathrow Airport to Siem Reap (return)

Airports
Origin
London
£516
only
£516
Destination
Siem Reap
£516
only
£516
Tue, 28 Apr
LHR
London Heathrow Airport
REP
Siem Reap
23h 55m
Thu, 14 May
REP
Siem Reap
LHR
London Heathrow Airport
16h 45m
£516
Trip: 17 days
7.6GoodShow reviews
Overall 7.6 Good
Based on 1,241 reviews
Overall
7.9
Boarding
7.8
Comfort
7.7
Crew
8.2
Entertainment
6.6
Food
7.2
HAN
DAD
Good 6.0

Pros: The crew were not visible and didn't offer any assistance

Cons: An offer of a snack as we paid a high price for the econom y flight

DAD
SGN
Okay 5.5

Pros: The check-in staff realised we hadn't allowed enough time to transit in Ho Chi Minh city, so they seated us close to the front and put business class tags on our luggage. They were the first on to the carousel.

Cons: Every one of our legs was delayed, which contributed to tight transit times.

SYD
SGN
Excellent 8.0

Pros: The seat was comfortable and the food was good

Cons: My flight was delayed but general was good I enjoyed the flight.

HUI
HAN
Good 7.3

Pros: Crew

Cons: Slow check-in not very comfortable seats and food was awful.

SGN
REP
Okay 4.0

Cons: If a flight is delayed, they could inform us.

Mon, 17 Feb
LHR
London Heathrow Airport
REP
Siem Reap
28h 40m
Wed, 4 Mar
REP
Siem Reap
LHR
London Heathrow Airport
35h 40m
£553
Trip: 17 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 3,701 reviews
Overall
8.7
Boarding
8.8
Comfort
8.5
Crew
9.0
Entertainment
8.7
Food
8.4
JFK
FRA
Mediocre 2.0

Pros: The help desk employees who helped me rebook my flight.

Cons: After rushing to catch my connecting Singapore flight, their desks were closed and there wasn’t an employee in site. Given that airlines can see connecting fights it would have been great to have someone stay back to either give me a boarding pass or help me rebook! UNSATISFACTORY!

SIN
PVG
Excellent 10.0

Pros: Amazing staff and service!

Cons: None!

LAX
NRT
Excellent 10.0

Pros: Food, service

Cons: The space

SFO
SIN
Excellent 8.3

Pros: I liked that on the longest leg of my trip - I had an entire row to myself to stretch out. Im old, things like that are important...along with compression socks...haha!

Cons: I think the food - I dont know exactly what, because we're on a plane - but I think it could be a bit more appealing? More greens, colors? Not sure, but it was okay.

BOM
SIN
Excellent 10.0

Pros: Superior standard

Wed, 11 Dec
LHR
London Heathrow Airport
REP
Siem Reap
14h 20m
Wed, 25 Dec
REP
Siem Reap
LHR
London Heathrow Airport
27h 40m
£614
Trip: 15 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 22,133 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
BCN
LHR
Good 6.0

Pros: Seats were comfortable and plane was clean

Cons: Provide a hot drink and Small snavk

TFS
LGW
Okay 5.6

Pros: Crew were good early on but didn’t check later on

Cons: It was ridiculously hot and the crew didn’t offer water after initial drinks run and we were seriously dehydrated. The flight was delayed and although the first half an hour we had excellent service there was no follow up service and the temperature in the plane was really very uncomfortable

JMK
LHR
Good 6.8

Pros: Crew was very polite & friendly. Chicken & bacon sandwich was tasty, good amount of mayo!

Cons: A bit chaotic boarding in Mykonos... not BA’s fault! Bathroom was a bit smelly.

BNA
LHR
Excellent 9.6

Pros: Crew very polite

Cons: In B222, Headphones didn't fit well in the audio plugs on the sides of the seats thus making very poor quality sounds while listening to music or videos. That wasn't an issue in B149. Just to let you be aware. Thanks.

BAH
LHR
Excellent 9.3

Pros: Super great crew and super great seats

Cons: Nothing! It was great!

Fri, 25 Oct
LHR
London Heathrow Airport
REP
Siem Reap
19h 55m
Sun, 27 Oct
REP
Siem Reap
LHR
London Heathrow Airport
26h 40m
£637
Trip: 3 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 6,100 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.4
Entertainment
8.2
Food
7.7
HKG
SEA
Okay 4.6

Cons: This airline will cancel your flight and blame it on customs in the US - the truth is the flight was undersold and they did not want to travel with so few passengers.

NRT
HKG
Good 6.6

Pros: Nice entertainment on this flight, modern movies and TV programs. The food was good, more than enough to fill you up on a 4.5 hr flight.

Cons: The business class configuration on the 777s operates on this flight is not worth the extra price paid. I found that the level of recline (120 degrees) made my back ache and it just wasn’t comfortable. I’ve flown this flight several times now and this is an issue for me. I’d like to arrive refreshed

JFK
YVR
Excellent 10.0

Cons: Shopping items available.

JFK
YVR
Okay 4.0

Cons: Customer service from the cathy pacific crew are not good at all.. I flight business to and from asia to the USA at least 3-4 times a year.. cathy pacific was such a disappointment..

TPE
HKG
Good 6.0

Pros: the noodle snack and food was good

Cons: more leg room would be nice on a long flight

Thu, 13 Feb
LHR
London Heathrow Airport
REP
Siem Reap
25h 40m
Thu, 20 Feb
REP
Siem Reap
LHR
London Heathrow Airport
17h 45m
£544
Trip: 8 days
7.6GoodShow reviews
Overall 7.6 Good
Based on 1,241 reviews
Overall
7.9
Boarding
7.8
Comfort
7.7
Crew
8.2
Entertainment
6.6
Food
7.2
ICN
HAN
Excellent 8.6

Cons: It’s satisfying everytime I fly with VietnamAirlines. Except that a kid behind me kicked my seat nonstop. Literally, nonstop!

SGN
TPE
Excellent 8.0

Cons: Boarding was announced for gate 27, then 22 on th Board, then back to 27 so we ran around a bit.

PVG
HAN
Excellent 10.0

Pros: I love flying on Vietnam Airlines Clean planes Crew always friendly and helpful

DAD
KIX
Okay 5.6

Pros: It was okay, really overpriced for what would have been a fine low-budget flight, like an Air Asia. If I had paid $200 or less for the flight, I would have no complaints about the comfort and service. But I paid over $600, so I'd expect a little more.

Cons: Seat comfort, food, entertainment, boarding, disembarking.

DAD
SGN
Okay 5.5

Pros: The check-in staff realised we hadn't allowed enough time to transit in Ho Chi Minh city, so they seated us close to the front and put business class tags on our luggage. They were the first on to the carousel.

Cons: Every one of our legs was delayed, which contributed to tight transit times.

*
Prices are per person, are for e–tickets and include all taxes & fees in GBP.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller
At KAYAK we don’t set prices, so it’s not possible for us to guarantee what other companies are selling.

We aggregate tons of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we don't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car hires can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find on occasion that certain prices are no longer available.

More questions or if you have a bad price to report to us
Please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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