$574 Cheap Flights from Houston (HOU) to Phnom Penh (PNH)

View $574 flight on Mon, Aug 25, 2025Opens in a new window

Popular airlines from Houston William Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH)

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Find available prices by choosing your travel dates.

Cheap Flights from Houston to Phnom Penh (HOU-PNH)

Prices were available within the past 7 days and start at $574 for one-way flights and $1,132 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Sep 1 - Wed, Oct 1
IAH
Houston
PNH
Phnom Penh
$1,132 Roundtrip, found 1 day ago
$1,132
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Sep 1 from Houston to Phnom Penh, returning Wed, Oct 1, priced at $1,132 found 1 day ago
Air Canada
Thu, Sep 18 - Mon, Sep 22
IAH
Houston
PNH
Phnom Penh
$1,134 Roundtrip, found 22 hours ago
$1,134
Roundtrip
found 22 hours ago
Select Air Canada flight, departing Thu, Sep 18 from Houston to Phnom Penh, returning Mon, Sep 22, priced at $1,134 found 22 hours ago
United
Wed, Apr 30 - Wed, Jun 4
IAH
Houston
PNH
Phnom Penh
$1,153 Roundtrip, found 3 days ago
$1,153
Roundtrip
found 3 days ago
Select United flight, departing Wed, Apr 30 from Houston to Phnom Penh, returning Wed, Jun 4, priced at $1,153 found 3 days ago
United
Tue, Apr 29 - Wed, Jun 4
IAH
Houston
PNH
Phnom Penh
$1,163 Roundtrip, found 3 days ago
$1,163
Roundtrip
found 3 days ago
Select United flight, departing Tue, Apr 29 from Houston to Phnom Penh, returning Wed, Jun 4, priced at $1,163 found 3 days ago
Cathay Pacific
Thu, Aug 21 - Mon, Sep 1
IAH
Houston
PNH
Phnom Penh
$1,182 Roundtrip, found 2 days ago
$1,182
Roundtrip
found 2 days ago
Select Cathay Pacific flight, departing Thu, Aug 21 from Houston to Phnom Penh, returning Mon, Sep 1, priced at $1,182 found 2 days ago
Delta
Mon, Aug 4 - Tue, Dec 23
HOU
Houston
PNH
Phnom Penh
$1,184 Roundtrip, found 2 days ago
$1,184
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Aug 4 from Houston to Phnom Penh, returning Tue, Dec 23, priced at $1,184 found 2 days ago
Delta
Tue, Oct 14 - Mon, Oct 20
IAH
Houston
PNH
Phnom Penh
$1,184 Roundtrip, found 1 hour ago
$1,184
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Oct 14 from Houston to Phnom Penh, returning Mon, Oct 20, priced at $1,184 found 1 hour ago
EVA Airways
Wed, Sep 3 - Tue, Sep 23
IAH
Houston
PNH
Phnom Penh
$1,211 Roundtrip, found 22 hours ago
$1,211
Roundtrip
found 22 hours ago
Select EVA Airways flight, departing Wed, Sep 3 from Houston to Phnom Penh, returning Tue, Sep 23, priced at $1,211 found 22 hours ago
Qatar Airways
Wed, Oct 8 - Sun, Oct 19
IAH
Houston
PNH
Phnom Penh
$1,292 Roundtrip, found 1 hour ago
$1,292
Roundtrip
found 1 hour ago
Select Qatar Airways flight, departing Wed, Oct 8 from Houston to Phnom Penh, returning Sun, Oct 19, priced at $1,292 found 1 hour ago
Singapore Airlines
Wed, Nov 5 - Wed, Nov 12
IAH
Houston
PNH
Phnom Penh
$1,300 Roundtrip, found 1 hour ago
$1,300
Roundtrip
found 1 hour ago
Select Singapore Airlines flight, departing Wed, Nov 5 from Houston to Phnom Penh, returning Wed, Nov 12, priced at $1,300 found 1 hour ago
Flights from Houston (IAH) to Phnom Penh (PNH)
Origin airport
George Bush Intercontinental
Destination airport
Phnom Penh Intl.
Airlines serving
Delta, Korean Air
Roundtrip price
$1,131
Distance
9267 mi

Houston to Phnom Penh Flights

The cheapest times to fly from Houston to Phnom Penh

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 Houston to Phnom Penh are during the month of September. You can find some of the cheapest flights from Houston to Phnom Penh with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Houston to Phnom Penh: 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 Houston to Phnom Penh

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 Houston to Phnom Penh in 2025. You can also book with separate airlines for your outbound and return journeys, from $574 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 Houston to Phnom Penh 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 Houston to Phnom Penh 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 William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH) cost?
Discover the latest flight deals from HOU to PNH by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from HOU to PNH?
The cheapest flights from HOU to PNH are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from HOU to PNH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from HOU to PNH. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH)?
You’ll have to catch a flight with a layover when traveling from William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from HOU to PNH?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary depending on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH)?
To arrive at Phnom Penh Intl. Airport (PNH) on time, choose a flight that leaves from William P. Hobby Airport (HOU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH) last-minute?
Booking your flight from HOU to PNH right before your getaway is typically more expensive. However, if you’re flexible with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a HOU to PNH flight and hotel package?
You’ll typically save money by securing a HOU to PNH flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one convenient place. After selecting your preferred flights and accommodations, you can add extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from William P. Hobby Airport (HOU) to Phnom Penh Intl. Airport (PNH)?
Typically, you can cancel or reschedule your HOU to PNH flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline’s rules and fees on flight changes, or if you need more details, visit our Customer Service portal.

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*Available to One Key members.