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Cheap flights from Chicago O'Hare Intl Airport to Siem Reap from $735

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 8/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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.
Multiple Airlines Logo
4:00 pm - 6:55 pm
ORD
-
SAI
38h 55m
2 stops
Multiple Airlines Logo
9:40 am - 1:55 pm
SAI
-
ORD
40h 15m
2 stops
$988Multiple Airlines
Mon, Sep 7 - Wed, Sep 30
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
12:55 pm - 1:55 pm
SAI
-
ORD
37h 00m
2 stops
$1,057Multiple Airlines
Tue, Oct 6 - Thu, Oct 22
Multiple Airlines Logo
7:20 pm - 11:15 am
ORD
-
SAI
51h 55m
3 stops
Multiple Airlines Logo
3:10 pm - 3:05 pm
SAI
-
ORD
35h 55m
3 stops
$1,353Multiple Airlines
Mon, Sep 7 - Wed, Sep 30
Multiple Airlines Logo
5:45 pm - 9:00 am
ORD
-
SAI
27h 15m
2 stops
Multiple Airlines Logo
7:10 pm - 8:40 pm
SAI
-
ORD
37h 30m
3 stops
$1,375Multiple Airlines
Mon, Sep 7 - Wed, Sep 30
Multiple Airlines Logo
7:20 pm - 11:15 am
ORD
-
SAI
51h 55m
3 stops
Multiple Airlines Logo
9:35 am - 3:05 pm
SAI
-
ORD
41h 30m
2 stops
$1,403Multiple Airlines
Tue, Oct 6 - Thu, Oct 22
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
11:50 pm - 9:10 pm
SAI
-
ORD
33h 20m
2 stops
$1,706Multiple Airlines
Sun, Aug 16 - Tue, Aug 18
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
10:35 pm - 5:05 pm
SAI
-
ORD
30h 30m
3 stops
$1,735Multiple Airlines
Sun, Aug 16 - Tue, Aug 18
ANA Logo
10:30 am - 4:55 pm
ORD
-
SAI
41h 25m
2 stops
ANA Logo
6:40 pm - 1:50 pm
SAI
-
ORD
32h 10m
2 stops
$1,977ANA
Thu, Dec 24 - Sun, Jan 10
Multiple Airlines Logo
9:50 pm - 6:45 pm
ORD
-
SAI
31h 55m
3 stops
Multiple Airlines Logo
10:45 am - 11:05 am
SAI
-
ORD
37h 20m
2 stops
$2,326Multiple Airlines
Thu, Dec 24 - Sun, Jan 10
Multiple Airlines Logo
12:50 pm - 8:45 am
ORD
-
SAI
30h 55m
3 stops
Multiple Airlines Logo
4:00 pm - 1:40 pm
SAI
-
ORD
34h 40m
3 stops
$2,349Multiple Airlines
Thu, Dec 24 - Sun, Jan 10

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Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 July 2, 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

Mon 9/7

4:00 pm-6:55 pm

2 stops38h 55m

Siem Reap–Angkor Intl

Wed 9/30

9:40 am-1:55 pm

2 stops40h 15m

$988

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 10/6

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Thu 10/22

12:55 pm-1:55 pm

2 stops37h 00m

$1,057

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 9/7

7:20 pm-11:15 am

3 stops51h 55m

Siem Reap–Angkor Intl

Wed 9/30

3:10 pm-3:05 pm

3 stops35h 55m

$1,353

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 9/7

5:45 pm-9:00 am

2 stops27h 15m

Siem Reap–Angkor Intl

Wed 9/30

7:10 pm-8:40 pm

3 stops37h 30m

$1,375

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 10/6

7:20 pm-11:15 am

3 stops51h 55m

Siem Reap–Angkor Intl

Thu 10/22

9:35 am-3:05 pm

2 stops41h 30m

$1,403

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 8/16

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Tue 8/18

11:50 pm-9:10 pm

2 stops33h 20m

$1,706
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 8/16

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Tue 8/18

10:35 pm-5:05 pm

3 stops30h 30m

$1,735

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 12/24

10:30 am-4:55 pm

2 stops41h 25m

Siem Reap–Angkor Intl

Sun 1/10

6:40 pm-1:50 pm

2 stops32h 10m

$1,977

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 12/24

9:50 pm-6:45 pm

3 stops31h 55m

Siem Reap–Angkor Intl

Sun 1/10

10:45 am-11:05 am

2 stops37h 20m

$2,326

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 12/24

12:50 pm-8:45 am

3 stops30h 55m

Siem Reap–Angkor Intl

Sun 1/10

4:00 pm-1:40 pm

3 stops34h 40m

$2,349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 Region of 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?

ANA is the most popular carrier operating from Chicago O'Hare Intl to Siem Reap

Cheap Chicago O'Hare Intl Airport to Region of Siem Reap flight deals and tips

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

Fastest flight time

28h 45m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Region of Siem Reap takes 28h 45m
There are no direct flights from Chicago O'Hare Intl Airport to Region of Siem Reap. There are no popular flight routes from Chicago O'Hare Intl Airport to Region of Siem Reap.
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Frequently asked questions about flying from Chicago O'Hare Intl Airport to Siem Reap

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

    Prices for flights from Chicago O'Hare Intl Airport to Siem Reap were last updated today.

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

    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.

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

    The travel and health documents you'll need for your trip to Siem Reap may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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?

All flight searches from Chicago to Siem Reap on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Chicago and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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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