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Cheap flights from Chicago O'Hare Intl Airport to Siem Reap from $622

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 O'Hare Intl Airport to Siem Reap departing on 9/15. 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
0 bags

Find the cheapest flights from Chicago O'Hare Intl Airport to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
$1,305Emirates
Tue, May 5 - Sat, May 16
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,306Emirates
Wed, May 6 - Sat, May 16
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,318Emirates
Mon, May 4 - Thu, May 14
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
38h 40m
2 stops
$1,342Emirates
Mon, May 4 - Fri, May 15
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
38h 40m
2 stops
$1,392Emirates
Wed, May 6 - Sun, May 17
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
38h 40m
2 stops
$1,418Emirates
Thu, May 7 - Sun, May 17
Multiple Airlines Logo
3:57 pm - 12:20 pm
ORD
-
SAI
32h 23m
3 stops
Multiple Airlines Logo
7:45 pm - 4:50 pm
SAI
-
ORD
33h 05m
2 stops
$1,522Multiple Airlines
Fri, May 8 - Sun, May 17
Multiple Airlines Logo
2:00 pm - 9:00 am
ORD
-
SAI
31h 00m
2 stops
Multiple Airlines Logo
3:10 pm - 8:35 am
SAI
-
ORD
29h 25m
2 stops
$1,526Multiple Airlines
Fri, Jul 24 - Sat, Aug 1
Multiple Airlines Logo
9:10 pm - 12:15 pm
ORD
-
SAI
27h 05m
2 stops
Multiple Airlines Logo
3:10 pm - 8:35 am
SAI
-
ORD
53h 25m
2 stops
$1,532Multiple Airlines
Mon, Jul 6 - Thu, Jul 16
Multiple Airlines Logo
2:00 pm - 12:20 pm
ORD
-
SAI
34h 20m
2 stops
Multiple Airlines Logo
7:20 pm - 8:35 am
SAI
-
ORD
49h 15m
2 stops
$1,546Multiple Airlines
Fri, May 8 - Sun, May 17

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Emirates flights from Chicago O'Hare Intl Airport to Siem Reap

Our best Emirates deals on Chicago O'Hare Intl Airport to Siem Reap flight tickets
Emirates
May 5
ORD8:35 pmChicago O'Hare Intl
36h 55m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
May 16
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,305
Emirates
May 6
ORD8:35 pmChicago O'Hare Intl
27h 45m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 16
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,306
Emirates
May 2
ORD8:35 pmChicago O'Hare Intl
27h 45m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 7
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,307

Singapore Airlines flights from Chicago O'Hare Intl Airport to Siem Reap

Our best Singapore Airlines deals on Chicago O'Hare Intl Airport to Siem Reap flight tickets
Singapore Airlines
May 2
ORD8:31 amChicago O'Hare Intl
37h 09m
3 stops
SAI9:40 amSiem Reap–Angkor Intl
May 7
SAI10:30 amSiem Reap–Angkor Intl
57h 14m
3 stops
ORD7:44 amChicago O'Hare Intl
$2,829
Singapore Airlines
Apr 30
ORD8:31 amChicago O'Hare Intl
37h 09m
3 stops
SAI9:40 amSiem Reap–Angkor Intl
May 7
SAI10:30 amSiem Reap–Angkor Intl
57h 14m
3 stops
ORD7:44 amChicago O'Hare Intl
$3,213

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to 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 25, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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 5/5

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Sat 5/16

11:50 pm-3:45 pm

2 stops27h 55m

$1,305
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 5/6

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Sat 5/16

11:50 pm-3:45 pm

2 stops27h 55m

$1,306

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 5/4

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Thu 5/14

11:50 pm-3:45 pm

2 stops27h 55m

$1,318

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 5/4

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Fri 5/15

1:05 pm-3:45 pm

2 stops38h 40m

$1,342

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 5/6

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Sun 5/17

1:05 pm-3:45 pm

2 stops38h 40m

$1,392

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 5/7

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Sun 5/17

1:05 pm-3:45 pm

2 stops38h 40m

$1,418

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 5/8

3:57 pm-12:20 pm

3 stops32h 23m

Siem Reap–Angkor Intl

Sun 5/17

7:45 pm-4:50 pm

2 stops33h 05m

$1,522

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 7/24

2:00 pm-9:00 am

2 stops31h 00m

Siem Reap–Angkor Intl

Sat 8/1

3:10 pm-8:35 am

2 stops29h 25m

$1,526

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 7/6

9:10 pm-12:15 pm

2 stops27h 05m

Siem Reap–Angkor Intl

Thu 7/16

3:10 pm-8:35 am

2 stops53h 25m

$1,532

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 5/8

2:00 pm-12:20 pm

2 stops34h 20m

Siem Reap–Angkor Intl

Sun 5/17

7:20 pm-8:35 am

2 stops49h 15m

$1,546

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Siem Reap

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Chicago O'Hare Intl to Siem Reap–Angkor Intl?

Etihad Airways is the most popular carrier operating from Chicago O'Hare Intl to Siem Reap–Angkor Intl

When to book flights from Chicago O'Hare Intl Airport to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Siem Reap (ORD to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Siem Reap

Fastest flight time

31h 00m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Siem Reap takes 31h 00m
There are no direct flights from Chicago O'Hare Intl Airport to Siem Reap. There are no popular flight routes from Chicago O'Hare Intl Airport to Siem Reap.
Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Siem Reap

  • How far is Chicago O'Hare Intl to Siem Reap–Angkor Intl by plane?

    A flight from Chicago O'Hare Intl to Siem Reap–Angkor Intl will travel around 8534.8 mi. In terms of flight time, this usually takes a little over 31h 00m.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Siem Reap–Angkor Intl Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Siem Reap–Angkor Intl Airport refresh daily.

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Siem Reap–Angkor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The required travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Siem Reap–Angkor Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Siem Reap for you.

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

Yes. momondo allows you to filter the results for Chicago to Siem Reap flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Siem Reap from Chicago.

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

Price alerts on flights to Siem Reap from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.
First Class to Siem Reap
Business Class to Siem Reap