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Phnom Penh

$6,450+ Cheap flights from Illinois to Phnom Penh (PNH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PNH
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Illinois to Phnom Penh

One-way flights from Illinois to Phnom Penh
Search for one-way flight options from Illinois to Phnom Penh. Find affordable one-way fares based on user searches. Data last updated January 28, 2026.

This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:00 pm
ORD
-
PNH
2 stops53h 00m
British Airways
Deal found 1/26$6,450
This CheapOair deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:35 pm
ORD
-
PNH
3 stops47h 25m
Multiple Airlines
Deal found 1/26$6,454

Find flight deals from Illinois to Phnom Penh

Keep the following information in mind while searching for Illinois to Phnom Penh flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

November

Average price

$1,172
Provider with most accurate pricing for Chicago (CHI)-Phnom Penh Pochentong flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Phnom Penh Pochentong flights.
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($292 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Phnom Penh that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from Illinois to Phnom Penh that are best for you.

Fly from

Illinois

Fly to

Phnom Penh

Route

Depart

Return

Price

ChicagoPhnom Penh

ORD - PNH

ORDPNH

Chicago O'Hare Intl

Sat 7/11

5:00 pm-10:00 am

2 stops53h 00m

$6,450

ChicagoPhnom Penh

ORD - PNH

ORDPNH

Chicago O'Hare Intl

Sat 7/11

10:35 pm-10:00 am

3 stops47h 25m

$6,454

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Best time to book a flight from Illinois to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Phnom Penh (average of $720). Flying from Illinois to Phnom Penh in June is currently the most expensive (average of $1,484). 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.

Related info for your journey

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

    Phnom Penh Pochentong (PNH) is the airport you will fly into if you book a flight from Illinois to Phnom Penh. It is only a 5.0 mi journey from Pochentong (PNH) to Phnom Penh’s city center.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Illinois to Phnom Penh (average of $720). Flying from Illinois to Phnom Penh in June is currently the most expensive (average of $1,484). 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.

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Alternative routes for Illinois to Phnom Penh

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Top 3 airlines flying from Illinois to Phnom Penh

Discover the top 3 airlines that operate flights from Illinois 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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Cathay PacificCheapest$730Average$1,175FlexibilityNo cancel feeOn-time72%
Korean AirCheapest$843Average$1,122FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$992Average$1,260FlexibilityNo cancel feeOn-time74%

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