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Cheap flights from Portsmouth to Phnom Penh from £809

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PNH
16 Jul — 23 Jul1
1 adult

Cheap flight deals from Portsmouth to Phnom Penh

Keep the following information in mind while searching for Portsmouth to Phnom Penh flight deals. Data was last updated 11 July 2025.

Round-trip from

£809

Popular in

December

Cheapest in

November

Average price

£797
24/8-31/8
  • 24/8-31/8
  • 4 total stops
  • 66h 50m total
  • Portsmouth to Phnom Penh
High demand for flights, 0% potential price rise
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Portsmouth to Phnom Penh

Cheapest flights from Portsmouth to Phnom Penh
Explore the most affordable flight options available from Portsmouth to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Sun 24/815:35SOU - PNH
2 stops40h 55mMultiple Airlines
Sun 31/815:35PNH - SOU
2 stops25h 55mMultiple Airlines
Deal found 10/7£809

Cheapflights Fare Finder

Customise your flight search to find flights from Portsmouth to Phnom Penh that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
Use the filters below to find and compare flights from Portsmouth to Phnom Penh that are best for you.

Fly from

Portsmouth

Fly to

Phnom Penh

Route

Depart

Return

Price

SouthamptonPhnom Penh

SOU - PNH

SOUPNH

Southampton Eastleigh

Sun 24/8

15:35-14:30

2 stops40h 55m

Phnom Penh Pochentong

Sun 31/8

15:35-11:30

2 stops25h 55m

£809

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Best time to book a flight from Portsmouth to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Portsmouth 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.

Cheapflights Insights

Everything you need to know about your flight from Portsmouth to Phnom Penh

What is the cheapest month to book a flight from Portsmouth to Phnom Penh?

Currently, September is the cheapest month in which you can book a flight from Portsmouth to Phnom Penh (average of £689). Flying from Portsmouth to Phnom Penh in July is currently the most expensive (average of £1,232). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from P0R to PNH?

Find hourly flight availability from Portsmouth to Phnom Penh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Phnom Penh as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Phnom Penh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Phnom Penh from Portsmouth?

    Phnom Penh Pochentong (PNH), located 5.0 mi from the city center, is the airport you fly into when you book flights from Portsmouth to Phnom Penh. 13 airlines have flights to Pochentong from Portsmouth on a regular basis. Booking flights from Portsmouth to Phnom Penh Pochentong should not be difficult; the airport handles an average of 0 inbound flights from Portsmouth per day.

  • Can I find deals for flights from Portsmouth to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Phnom Penh flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Phnom Penh.

  • Can I find deals for business class flights from Portsmouth to Phnom Penh?

    Yes. Cheapflights offers flight deals from Portsmouth to Phnom Penh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portsmouth to Phnom Penh?

    Currently, September is the cheapest month in which you can book a flight from Portsmouth to Phnom Penh (average of £689). Flying from Portsmouth to Phnom Penh in July is currently the most expensive (average of £1,232). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portsmouth to Phnom Penh

Discover the top 10 airlines that operate flights from Portsmouth to Phnom Penh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£358Average£467FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£378Average£451FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Air ChinaCheapest£422Average£492FlexibilityNo cancel feeOn-time67%
Search Air China flights
China EasternCheapest£506Average£585FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Etihad AirwaysCheapest£512Average£589FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£586Average£699FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Malaysia AirlinesCheapest£589Average£705FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
British AirwaysCheapest£640Average£790FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Vietnam AirlinesCheapest£650Average£742FlexibilityNo cancel feeOn-time81%
Search Vietnam Airlines flights
Cathay PacificCheapest£666Average£785FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Phnom Penh?

Cheapflights helps you search for flights from Portsmouth to Phnom Penh via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Phnom Penh?

Cheapflights helps you find that perfect flight to Phnom Penh from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portsmouth to Phnom Penh with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Portsmouth to Phnom Penh, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Portsmouth to Phnom Penh become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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