$405 Cheap Flights from Chicago (ORD) to Phnom Penh (PNH)

View $405 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH)

Find available prices by choosing your travel dates.

Cheap Flights from Chicago to Phnom Penh (ORD-PNH)

Prices were available within the past 7 days and start at $405 for one-way flights and $775 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Oct 22 - Thu, Nov 6
ORD
Chicago
PNH
Phnom Penh
$775 Roundtrip, found 9 hours ago
$775
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Oct 22 from Chicago to Phnom Penh, returning Thu, Nov 6, priced at $775 found 9 hours ago
Cathay Pacific
Wed, Aug 27 - Tue, Sep 23
ORD
Chicago
PNH
Phnom Penh
$819 Roundtrip, found 6 hours ago
$819
Roundtrip
found 6 hours ago
Select Cathay Pacific flight, departing Wed, Aug 27 from Chicago to Phnom Penh, returning Tue, Sep 23, priced at $819 found 6 hours ago
Korean Air
Fri, Oct 24 - Sun, Nov 23
ORD
Chicago
PNH
Phnom Penh
$877 Roundtrip, just found
$877
Roundtrip
just found
Select Korean Air flight, departing Fri, Oct 24 from Chicago to Phnom Penh, returning Sun, Nov 23, priced at $877 just found
Delta
Fri, Oct 24 - Sun, Nov 23
ORD
Chicago
PNH
Phnom Penh
$888 Roundtrip, just found
$888
Roundtrip
just found
Select Delta flight, departing Fri, Oct 24 from Chicago to Phnom Penh, returning Sun, Nov 23, priced at $888 just found
EVA Airways
Wed, Aug 27 - Tue, Sep 23
ORD
Chicago
PNH
Phnom Penh
$1,121 Roundtrip, found 6 hours ago
$1,121
Roundtrip
found 6 hours ago
Select EVA Airways flight, departing Wed, Aug 27 from Chicago to Phnom Penh, returning Tue, Sep 23, priced at $1,121 found 6 hours ago
United
Sun, Oct 26 - Mon, Nov 17
ORD
Chicago
PNH
Phnom Penh
$1,171 Roundtrip, found 6 hours ago
$1,171
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Oct 26 from Chicago to Phnom Penh, returning Mon, Nov 17, priced at $1,171 found 6 hours ago
Turkish Airlines
Wed, Oct 22 - Fri, Nov 14
ORD
Chicago
PNH
Phnom Penh
$1,201 Roundtrip, found 2 days ago
$1,201
Roundtrip
found 2 days ago
Select Turkish Airlines flight, departing Wed, Oct 22 from Chicago to Phnom Penh, returning Fri, Nov 14, priced at $1,201 found 2 days ago
Singapore Airlines
Sat, Jan 10 - Wed, Jan 21
ORD
Chicago
PNH
Phnom Penh
$1,360 Roundtrip, found 4 days ago
$1,360
Roundtrip
found 4 days ago
Select Singapore Airlines flight, departing Sat, Jan 10 from Chicago to Phnom Penh, returning Wed, Jan 21, priced at $1,360 found 4 days ago
Etihad Airways
Sun, Nov 9 - Sun, Nov 30
ORD
Chicago
PNH
Phnom Penh
$1,362 Roundtrip, found 7 hours ago
$1,362
Roundtrip
found 7 hours ago
Select Etihad Airways flight, departing Sun, Nov 9 from Chicago to Phnom Penh, returning Sun, Nov 30, priced at $1,362 found 7 hours ago
Emirates
Sun, Oct 26 - Mon, Nov 17
ORD
Chicago
PNH
Phnom Penh
$1,403 Roundtrip, found 6 hours ago
$1,403
Roundtrip
found 6 hours ago
Select Emirates flight, departing Sun, Oct 26 from Chicago to Phnom Penh, returning Mon, Nov 17, priced at $1,403 found 6 hours ago
Flights from Chicago (ORD) to Phnom Penh (PNH)
Origin airport
O'Hare Intl.
Destination airport
Phnom Penh Intl.
Airlines serving
Air Canada, Asiana Airlines, Austrian Airlines, British Airways, Cathay Pacific, China Southern Airlines, Delta, EVA Airways, Emirates, Etihad Airways, Finnair, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$775
Distance
8650 mi

Chicago to Phnom Penh Flights

The cheapest times to fly from Chicago 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 Chicago to Phnom Penh are during the month of October. You can find some of the cheapest flights from Chicago to Phnom Penh with Expedia's search tool and vast selection of airlines.

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

Sunday is one of the best days to book for cheap flights from Chicago 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 Chicago 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 Chicago to Phnom Penh in 2025. You can also book with separate airlines for your outbound and return journeys, from $405 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 Chicago 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 Chicago 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 O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH) cost?
Discover the latest flight deals from ORD 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 ORD to PNH?
The cheapest flights from ORD 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 ORD to PNH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ORD to PNH. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH)?
You’ll need to take a flight with a layover if you’re traveling from O’Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from ORD to PNH?
Generally you’ll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH)?
To touch down at Phnom Penh Intl. Airport (PNH) on time, opt for a flight that leaves O’Hare Intl. Airport (ORD) 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 O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH) last-minute?
Waiting until just before your departure to book a ticket from ORD to PNH generally means paying more. While you may find some last-minute deals, there’s no guarantee. Be flexible with your itinerary to maximize your chances of landing a bargain.
Is it cheaper to book an ORD to PNH flight and hotel package?
You’ll typically save money by securing an ORD 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 simple to manage it all in one place. Once you’ve chosen your ideal flights and accommodations, consider adding extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Phnom Penh Intl. Airport (PNH)?
It’s generally possible to cancel or reschedule your ORD to PNH flight. However, for bookings made more than 24 hours ago, additional fees 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 details on our Customer Service portal.

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*Available to One Key members.