$632 Cheap Flights from Phnom Penh (PNH) to Ontario (ONT)

View $632 flight on Tue, Sep 2, 2025Opens in a new window

Popular airlines from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Phnom Penh to Ontario (PNH-ONT)

Prices were available within the past 7 days and start at $632 for one-way flights and $2,533 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Mon, Oct 13 - Sat, Oct 25
PNH
Phnom Penh
ONT
Ontario
$2,533 Roundtrip, found 2 days ago
$2,533
Roundtrip
found 2 days ago
Select Etihad Airways flight, departing Mon, Oct 13 from Phnom Penh to Ontario, returning Sat, Oct 25, priced at $2,533 found 2 days ago
Etihad Airways
Sat, Oct 18 - Sat, Oct 25
PNH
Phnom Penh
ONT
Ontario
$2,548 Roundtrip, found 2 days ago
$2,548
Roundtrip
found 2 days ago
Select Etihad Airways flight, departing Sat, Oct 18 from Phnom Penh to Ontario, returning Sat, Oct 25, priced at $2,548 found 2 days ago
Etihad Airways
Sat, Oct 18 - Sat, Oct 25
PNH
Phnom Penh
ONT
Ontario
$2,736 Roundtrip, found 2 days ago
$2,736
Roundtrip
found 2 days ago
Select Etihad Airways flight, departing Sat, Oct 18 from Phnom Penh to Ontario, returning Sat, Oct 25, priced at $2,736 found 2 days ago
Shenzhen Airlines
Sun, Sep 14 - Sun, Sep 21
PNH
Phnom Penh
ONT
Ontario
$3,531 Roundtrip, found 13 hours ago
$3,531
Roundtrip
found 13 hours ago
Select Shenzhen Airlines flight, departing Sun, Sep 14 from Phnom Penh to Ontario, returning Sun, Sep 21, priced at $3,531 found 13 hours ago
Shenzhen Airlines
Sun, Sep 14 - Sun, Sep 21
PNH
Phnom Penh
ONT
Ontario
$3,805 Roundtrip, found 13 hours ago
$3,805
Roundtrip
found 13 hours ago
Select Shenzhen Airlines flight, departing Sun, Sep 14 from Phnom Penh to Ontario, returning Sun, Sep 21, priced at $3,805 found 13 hours ago
Shenzhen Airlines
Sun, Sep 14 - Sun, Sep 21
PNH
Phnom Penh
ONT
Ontario
$3,810 Roundtrip, found 13 hours ago
$3,810
Roundtrip
found 13 hours ago
Select Shenzhen Airlines flight, departing Sun, Sep 14 from Phnom Penh to Ontario, returning Sun, Sep 21, priced at $3,810 found 13 hours ago
Shenzhen Airlines
Sun, Sep 14 - Sun, Sep 21
PNH
Phnom Penh
ONT
Ontario
$3,855 Roundtrip, found 13 hours ago
$3,855
Roundtrip
found 13 hours ago
Select Shenzhen Airlines flight, departing Sun, Sep 14 from Phnom Penh to Ontario, returning Sun, Sep 21, priced at $3,855 found 13 hours ago
Shenzhen Airlines
Sun, Sep 14 - Sun, Sep 21
PNH
Phnom Penh
ONT
Ontario
$3,862 Roundtrip, found 13 hours ago
$3,862
Roundtrip
found 13 hours ago
Select Shenzhen Airlines flight, departing Sun, Sep 14 from Phnom Penh to Ontario, returning Sun, Sep 21, priced at $3,862 found 13 hours ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $3,731
SNA
John Wayne
Average driving time to city center42 min
Flights from $3,731
Flights from Phnom Penh (PNH) to Ontario (ONT)
Origin airport
Phnom Penh Intl.
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
$2,533
Distance
8231 mi

Phnom Penh to Ontario Flights

The cheapest times to fly from Phnom Penh to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phnom Penh to Ontario are during the month of October. You can find some of the cheapest flights from Phnom Penh to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phnom Penh to Ontario

Sunday is one of the best days to book for cheap flights from Phnom Penh to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phnom Penh to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phnom Penh to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $632 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phnom Penh to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phnom Penh to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $632 or cheap return flight from $2,533 from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)?
October is the least expensive month to fly from PNH to ONT. Traveling during an off-peak travel window is often the key to finding a great deal.
What is the cheapest airline that flies from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline that'll fly you from PNH to ONT, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll have to take a flight with a layover if you're traveling from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from PNH to ONT?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) without delays, select a flight that takes off from Phnom Penh Intl. Airport (PNH) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until right before your break to book a flight from PNH to ONT generally means paying more. While you may find some last-minute discounts, they aren't always guaranteed. Be flexible with your itinerary to maximize your chances of scoring a bargain.
Is it cheaper to book a PNH to ONT flight and hotel package?
You can save money by booking a PNH to ONT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your ideal flights and accommodations, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Phnom Penh Intl. Airport (PNH) to Los Angeles - Ontario Intl. Airport (ONT)?
Generally, it's possible to reschedule or cancel your PNH to ONT flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.