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Cheap flights from Chicago to Siem Reap from $851

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Siem Reap departing on 6/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Chicago to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:00 pm - 11:15 am
ORD
-
SAI
34h 15m
2 stops
Multiple Airlines Logo
3:10 pm - 9:15 am
SAI
-
ORD
30h 05m
2 stops
$1,046Multiple Airlines
Sat, Apr 18 - Sat, Apr 25
Multiple Airlines Logo
12:30 am - 6:45 pm
ORD
-
SAI
30h 15m
2 stops
Multiple Airlines Logo
9:40 am - 8:45 pm
SAI
-
ORD
23h 05m
2 stops
$1,091Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Emirates Logo
8:35 pm - 12:15 pm
ORD
-
SAI
27h 40m
2 stops
Emirates Logo
12:55 pm - 3:45 pm
SAI
-
ORD
62h 50m
2 stops
$1,442Emirates
Mon, Jul 20 - Mon, Aug 3
Multiple Airlines Logo
12:30 am - 6:45 pm
ORD
-
SAI
30h 15m
2 stops
Multiple Airlines Logo
4:55 pm - 3:40 pm
SAI
-
ORD
34h 45m
3 stops
$1,524Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Qatar Airways Logo
8:31 am - 6:45 pm
ORD
-
SAI
46h 14m
3 stops
Qatar Airways Logo
7:30 pm - 4:50 pm
SAI
-
ORD
33h 20m
2 stops
$1,650Qatar Airways
Sat, Apr 18 - Sat, Apr 25
Emirates Logo
2:13 pm - 9:30 pm
ORD
-
SAI
43h 17m
3 stops
Emirates Logo
11:50 pm - 11:17 pm
SAI
-
ORD
35h 27m
3 stops
$1,901Emirates
Thu, Sep 10 - Tue, Sep 15
Singapore Airlines Logo
8:05 pm - 9:40 am
ORD
-
SAI
49h 35m
2 stops
Singapore Airlines Logo
10:30 am - 5:20 pm
SAI
-
ORD
42h 50m
3 stops
$1,982Singapore Airlines
Mon, Jul 20 - Mon, Aug 3
Singapore Airlines Logo
9:39 am - 9:40 am
ORD
-
SAI
36h 01m
3 stops
Singapore Airlines Logo
10:30 am - 5:20 pm
SAI
-
ORD
42h 50m
3 stops
$2,701Singapore Airlines
Mon, Jul 20 - Mon, Aug 3
Multiple Airlines Logo
5:55 pm - 6:20 pm
ORD
-
SAI
36h 25m
3 stops
Multiple Airlines Logo
1:05 pm - 7:20 am
SAI
-
ORD
30h 15m
3 stops
$4,102Multiple Airlines
Sat, Apr 18 - Sat, Apr 25

Qatar Airways flights from Chicago to Region of Siem Reap

Our best Qatar Airways deals on Chicago to Region of Siem Reap flight tickets
Qatar Airways
Apr 11
ORD4:27 pmChicago O'Hare Intl
38h 18m
3 stops
SAI6:45 pmSiem Reap–Angkor Intl
Apr 26
SAI1:05 pmSiem Reap–Angkor Intl
38h 00m
2 stops
ORD3:05 pmChicago O'Hare Intl
$1,576
Qatar Airways
Apr 18
ORD8:31 amChicago O'Hare Intl
46h 14m
3 stops
SAI6:45 pmSiem Reap–Angkor Intl
Apr 25
SAI7:30 pmSiem Reap–Angkor Intl
33h 20m
2 stops
ORD4:50 pmChicago O'Hare Intl
$1,650
Qatar Airways
Apr 11
ORD7:45 amChicago O'Hare Intl
47h 00m
3 stops
SAI6:45 pmSiem Reap–Angkor Intl
Apr 26
SAI1:05 pmSiem Reap–Angkor Intl
39h 45m
2 stops
ORD4:50 pmChicago O'Hare Intl
$1,871

Emirates flights from Chicago to Region of Siem Reap

Our best Emirates deals on Chicago to Region of Siem Reap flight tickets
Emirates
Jul 20
ORD8:35 pmChicago O'Hare Intl
27h 40m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Aug 3
SAI12:55 pmSiem Reap–Angkor Intl
62h 50m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,442
Emirates
Sep 10
ORD2:13 pmChicago O'Hare Intl
43h 17m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
Sep 15
SAI11:50 pmSiem Reap–Angkor Intl
35h 27m
3 stops
ORD11:17 pmChicago O'Hare Intl
$1,901

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Region of Siem Reap 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, momondo users made 832,500 searches. Data last updated April 3, 2026.
Use the filters below to find and compare flights from Chicago to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/18

1:00 pm-11:15 am

2 stops34h 15m

Siem Reap–Angkor Intl

Sat 4/25

3:10 pm-9:15 am

2 stops30h 05m

$1,046
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 9/9

12:30 am-6:45 pm

2 stops30h 15m

Siem Reap–Angkor Intl

Tue 9/15

9:40 am-8:45 pm

2 stops23h 05m

$1,091

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 7/20

8:35 pm-12:15 pm

2 stops27h 40m

Siem Reap–Angkor Intl

Mon 8/3

12:55 pm-3:45 pm

2 stops62h 50m

$1,442

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 9/9

12:30 am-6:45 pm

2 stops30h 15m

Siem Reap–Angkor Intl

Tue 9/15

4:55 pm-3:40 pm

3 stops34h 45m

$1,524

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/18

8:31 am-6:45 pm

3 stops46h 14m

Siem Reap–Angkor Intl

Sat 4/25

7:30 pm-4:50 pm

2 stops33h 20m

$1,650

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 9/10

2:13 pm-9:30 pm

3 stops43h 17m

Siem Reap–Angkor Intl

Tue 9/15

11:50 pm-11:17 pm

3 stops35h 27m

$1,901

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 7/20

8:05 pm-9:40 am

2 stops49h 35m

Siem Reap–Angkor Intl

Mon 8/3

10:30 am-5:20 pm

3 stops42h 50m

$1,982

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 7/20

9:39 am-9:40 am

3 stops36h 01m

Siem Reap–Angkor Intl

Mon 8/3

10:30 am-5:20 pm

3 stops42h 50m

$2,701

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/18

5:55 pm-6:20 pm

3 stops36h 25m

Siem Reap–Angkor Intl

Sat 4/25

1:05 pm-7:20 am

3 stops30h 15m

$4,102
Cheapest one-way

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 6/10

7:05 pm-6:20 am

3 stops47h 15m

$851

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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Cheap Chicago to Region of Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Region of Siem Reap

Fastest flight time

27h 15m

Direct flights

None
The fastest flight from Chicago to Region of Siem Reap takes 27h 15m
There are no direct flights from Chicago to Region of Siem Reap. There are no popular flight routes from Chicago to Region of Siem Reap.
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Frequently asked questions about flying from Chicago to Siem Reap

  • When did momondo last update prices for flights from Chicago to Siem Reap?

    Prices for flights from Chicago to Siem Reap were last updated today.

  • How old do you have to be to fly from Chicago to Siem Reap?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago to Siem Reap.

  • What documentation or ID do you need to fly to Siem Reap?

    The necessary travel and health documents for your Siem Reap trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Chicago to Siem Reap

  • How do I get Price Alerts for flights from Chicago to Region of Siem Reap?

    Price Alerts will notify you by email when the price for flights to Region of Siem Reap from Chicago decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Chicago to Region of Siem Reap with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Siem Reap?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Siem Reap from Chicago.

Can I find flights from Chicago to Siem Reap with flexible booking policies on momondo?

Flights from Chicago to Siem Reap with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Siem Reap?

momondo provides multiple filters to help you find the best flight to Siem Reap from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Chicago to Siem Reap right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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