Cheap flights from Southampton to Phnom Penh
Cheap return flights from Southampton to Phnom Penh
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Phnom Penh flight facts
What you need to know
What are the cheapest airlines?
- AirAsia
- Vietnam Airlines
- Qatar Airways
These airlines usually offer the cheapest flights from Southampton to Phnom Penh.
What airlines fly indirectly?
- Emirates
- Singapore Airlines
- Turkish Airlines
These airlines fly from Southampton to Phnom Penh, but you’ll have at least one layover.
How long is the flight?
18 hours 30 minutes
This is the shortest flight time from Southampton to Phnom Penh.
Alternative flights from the UK to Phnom Penh
Check out prices for other routes
Alternative flights from Southampton
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the Southampton/Phnom Penh route. There are around 35 flights on any given week from the UK to Phnom Penh and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from Southampton to Phnom Penh
Tips and advice from our flight experts
You've searched for flights from Southampton to Phnom Penh. We've found 25 flights and compared them to give you the best offer. On average, AirAsia is the cheapest airline for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket for the route Southampton to Phnom Penh on 21/04/2026 at 20:25 for £85.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines that operate the 10,000 km flight from Southampton to Phnom Penh.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. The best time to fly is during the off-peak season. AirAsia is a popular and affordable choice for this route, with an average flight duration of 18 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our hotel booking options or use our flight + hotel service to save time and money.
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