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Cheap flights from Chicago to Siem Reap from $989

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Siem Reap departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
4:00 pm - 9:00 am
ORD
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 1:55 pm
SAI
-
ORD
37h 00m
2 stops
$989Multiple Airlines
Tue, Sep 1 - Sat, Sep 19
Multiple Airlines Logo
4:00 pm - 9:00 am
ORD
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 1:55 pm
SAI
-
ORD
37h 00m
2 stops
$1,024Multiple Airlines
Tue, Sep 1 - Sat, Sep 19
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
7:25 pm - 1:55 pm
SAI
-
ORD
30h 30m
2 stops
$1,035Multiple Airlines
Tue, Oct 20 - Thu, Oct 29
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
1:20 pm - 1:55 pm
SAI
-
ORD
36h 35m
2 stops
$1,055Multiple Airlines
Tue, Sep 29 - Tue, Mar 16
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
7:25 pm - 1:55 pm
SAI
-
ORD
30h 30m
2 stops
$1,110Multiple Airlines
Tue, Oct 20 - Fri, Oct 30
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
7:25 pm - 1:55 pm
SAI
-
ORD
30h 30m
2 stops
$1,185Multiple Airlines
Thu, Oct 22 - Fri, Oct 30
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,298Emirates
Sun, Sep 27 - Thu, Mar 18
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
1:20 pm - 3:45 pm
SAI
-
ORD
38h 25m
2 stops
$1,299Emirates
Sun, Sep 27 - Wed, Mar 17
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,348Emirates
Thu, Oct 1 - Thu, Mar 18
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
1:20 pm - 3:45 pm
SAI
-
ORD
38h 25m
2 stops
$1,349Emirates
Thu, Oct 1 - Fri, Mar 19

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
Oct 2
ORD7:20 pmChicago O'Hare Intl
35h 35m
2 stops
SAI6:55 pmSiem Reap–Angkor Intl
Mar 19
SAI7:25 pmSiem Reap–Angkor Intl
32h 05m
2 stops
ORD3:30 pmChicago O'Hare Intl
$1,607
Qatar Airways
Oct 2
ORD7:20 pmChicago O'Hare Intl
35h 35m
2 stops
SAI6:55 pmSiem Reap–Angkor Intl
Mar 14
SAI7:25 pmSiem Reap–Angkor Intl
32h 05m
2 stops
ORD3:30 pmChicago O'Hare Intl
$1,647
Qatar Airways
Oct 19
ORD7:20 pmChicago O'Hare Intl
25h 40m
2 stops
SAI9:00 amSiem Reap–Angkor Intl
Oct 31
SAI7:25 pmSiem Reap–Angkor Intl
32h 05m
2 stops
ORD3:30 pmChicago O'Hare Intl
$1,681

Etihad Airways flights from Chicago to Region of Siem Reap

Our best Etihad Airways deals on Chicago to Region of Siem Reap flight tickets
Etihad Airways
Aug 10
ORD2:00 pmChicago O'Hare Intl
40h 55m
2 stops
SAI6:55 pmSiem Reap–Angkor Intl
Aug 18
SAI3:10 pmSiem Reap–Angkor Intl
29h 25m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,489
Etihad Airways
Oct 19
ORD9:10 pmChicago O'Hare Intl
27h 05m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Oct 28
SAI1:20 pmSiem Reap–Angkor Intl
31h 35m
2 stops
ORD8:55 amChicago O'Hare Intl
$1,510
Etihad Airways
Oct 19
ORD9:10 pmChicago O'Hare Intl
23h 50m
2 stops
SAI9:00 amSiem Reap–Angkor Intl
Oct 30
SAI1:20 pmSiem Reap–Angkor Intl
31h 35m
2 stops
ORD8:55 amChicago O'Hare Intl
$1,545

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 May 22, 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

Tue 9/1

4:00 pm-9:00 am

2 stops29h 00m

Siem Reap–Angkor Intl

Sat 9/19

12:55 pm-1:55 pm

2 stops37h 00m

$989

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 9/1

4:00 pm-9:00 am

2 stops29h 00m

Siem Reap–Angkor Intl

Sat 9/19

12:55 pm-1:55 pm

2 stops37h 00m

$1,024
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 10/20

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Thu 10/29

7:25 pm-1:55 pm

2 stops30h 30m

$1,035

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 9/29

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Tue 3/16

1:20 pm-1:55 pm

2 stops36h 35m

$1,055

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 10/20

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Fri 10/30

7:25 pm-1:55 pm

2 stops30h 30m

$1,110

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 10/22

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Fri 10/30

7:25 pm-1:55 pm

2 stops30h 30m

$1,185

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 9/27

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Thu 3/18

11:50 pm-3:45 pm

2 stops27h 55m

$1,298

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 9/27

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Wed 3/17

1:20 pm-3:45 pm

2 stops38h 25m

$1,299

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 10/1

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Thu 3/18

11:50 pm-3:45 pm

2 stops27h 55m

$1,348

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 10/1

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Fri 3/19

1:20 pm-3:45 pm

2 stops38h 25m

$1,349

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

24h 45m

Direct flights

None
The fastest flight from Chicago to Region of Siem Reap takes 24h 45m
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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