Phnom Penh

Cheap flights from Riverside, CA to Phnom Penh (PNH)

LAX — PNH
mar 4 — mar 111
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Riverside to Phnom Penh with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Riverside to Phnom Penh

Keep the following information in mind while searching for Riverside to Phnom Penh flight deals. Data was last updated februari 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

September

Average price

$786
Provider with most accurate pricing for Los Angeles-Phnom Penh Pochentong flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Phnom Penh Pochentong flights.
Highest demand for flights based on searches. 21% potential increase in price ($273 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Average for round-trip flights in February 2026

Cheapflights Insights

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

How far ahead should I book a flight from Riverside to Phnom Penh?

Use this chart to determine the optimal time to book a round-trip flight from Riverside to Phnom Penh. Price data was last updated on January 30, 2026.

The price you pay for your flight from Riverside to Phnom Penh may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Riverside to Phnom Penh (average of $566). Flying from Riverside to Phnom Penh in June is currently the most expensive (average of $849). 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.

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phnom Penh. Reviews last updated februari 2, 2026.
Peruse reviews from past customers who have flown with EVA Air, China Airlines, and Singapore Airlines from Riverside to Phnom Penh to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Related info for your journey

Find useful and relevant information for your journey from Riverside 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 Riverside?

    Located just 5.0 mi from the city center, Phnom Penh Pochentong is the airport most travelers will use when flying to Phnom Penh from Riverside. Booking flights from Riverside to Pochentong (PNH) should be relatively easy as there are 0 daily inbound flights from Riverside from 9 different airlines.

  • What are the cheapest airlines to fly from Riverside to Phnom Penh one-way?

    For one-way options, check prices for China Southern. According to our data, you can fly for as low as $258. Users have also found prices from $331 and $362 on Singapore Airlines and Cathay Pacific, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Riverside 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 Riverside to Phnom Penh?

    Currently, September is the cheapest month in which you can book a flight from Riverside to Phnom Penh (average of $566). Flying from Riverside to Phnom Penh in June is currently the most expensive (average of $849). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from Riverside to Phnom Penh

Discover the top 9 airlines that operate flights from Riverside 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 2,558,603 searches. Data last updated februari 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest$560Average$628FlexibilityNo cancel feeOn-time69%
China EasternCheapest$643Average$791FlexibilityNo cancel feeOn-time62%
Singapore AirlinesCheapest$655Average$847FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$661Average$750FlexibilityNo cancel feeOn-time60%
Cathay PacificCheapest$695Average$839FlexibilityNo cancel feeOn-time72%
Asiana AirlinesCheapest$707Average$774FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$750Average$905FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$821Average$1,235FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$861Average$1,118FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.