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Cheap flights from Chicago O'Hare Intl Airport to Siem Reap from $687

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 11/5. 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 - 9:00 am
ORD
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 2:20 pm
SAI
-
ORD
37h 25m
2 stops
$1,099Multiple Airlines
Thu, Aug 27 - Thu, Sep 3
Multiple Airlines Logo
4:15 pm - 9:00 am
ORD
-
SAI
28h 45m
2 stops
Multiple Airlines Logo
1:20 pm - 12:55 pm
SAI
-
ORD
36h 35m
2 stops
$1,126Multiple Airlines
Mon, Oct 5 - Thu, Nov 5
Multiple Airlines Logo
3:35 pm - 9:15 am
ORD
-
SAI
29h 40m
2 stops
Multiple Airlines Logo
7:25 pm - 1:55 pm
SAI
-
ORD
30h 30m
2 stops
$1,141Multiple Airlines
Tue, Oct 27 - Tue, Mar 16
Multiple Airlines Logo
2:35 pm - 9:15 am
ORD
-
SAI
29h 40m
2 stops
Multiple Airlines Logo
7:25 pm - 1:55 pm
SAI
-
ORD
30h 30m
2 stops
$1,216Multiple Airlines
Tue, Nov 10 - Wed, Mar 17
Multiple Airlines Logo
12:30 am - 9:15 am
ORD
-
SAI
44h 45m
2 stops
Multiple Airlines Logo
9:55 am - 8:35 pm
SAI
-
ORD
22h 40m
2 stops
$1,274Multiple Airlines
Sun, Oct 25 - Wed, Mar 17
Multiple Airlines Logo
12:30 am - 9:15 am
ORD
-
SAI
44h 45m
2 stops
Multiple Airlines Logo
9:55 am - 8:35 pm
SAI
-
ORD
22h 40m
2 stops
$1,277Multiple Airlines
Sun, Oct 25 - Mon, Mar 15
Multiple Airlines Logo
4:00 pm - 5:10 pm
ORD
-
SAI
37h 10m
3 stops
Multiple Airlines Logo
9:35 am - 2:20 pm
SAI
-
ORD
40h 45m
2 stops
$1,287Multiple Airlines
Thu, Aug 27 - Thu, Sep 3
Emirates Logo
8:45 pm - 9:10 pm
ORD
-
SAI
36h 25m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,298Emirates
Sun, Oct 25 - Tue, Mar 16
Emirates Logo
8:35 pm - 12:15 pm
ORD
-
SAI
27h 40m
2 stops
Emirates Logo
12:55 pm - 3:45 pm
SAI
-
ORD
38h 50m
2 stops
$1,299Emirates
Wed, Aug 26 - Wed, Sep 2
Multiple Airlines Logo
11:30 pm - 1:15 pm
ORD
-
SAI
24h 45m
2 stops
Multiple Airlines Logo
9:55 am - 8:35 pm
SAI
-
ORD
22h 40m
2 stops
$1,330Multiple Airlines
Wed, Nov 11 - Wed, Mar 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
Oct 25
ORD8:45 pmChicago O'Hare Intl
36h 25m
2 stops
SAI9:10 pmSiem Reap–Angkor Intl
Mar 16
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,298
Emirates
Aug 26
ORD8:35 pmChicago O'Hare Intl
27h 40m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Sep 1
SAI11:50 pmSiem Reap–Angkor Intl
51h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,299
Emirates
Aug 24
ORD8:35 pmChicago O'Hare Intl
51h 40m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Sep 3
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,334

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

Our best United Airlines deals on Chicago O'Hare Intl Airport to Siem Reap flight tickets
United Airlines
Jul 3
ORD7:30 amChicago O'Hare Intl
38h 10m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 10
SAI10:30 amSiem Reap–Angkor Intl
47h 08m
2 stops
ORD9:38 pmChicago O'Hare Intl
$1,448
United Airlines
Oct 28
ORD9:30 pmChicago O'Hare Intl
54h 25m
2 stops
SAI3:55 pmSiem Reap–Angkor Intl
Mar 14
SAI10:45 amSiem Reap–Angkor Intl
45h 40m
2 stops
ORD7:25 pmChicago O'Hare Intl
$1,468
United Airlines
Nov 10
ORD10:40 amChicago O'Hare Intl
40h 15m
2 stops
SAI3:55 pmSiem Reap–Angkor Intl
Mar 14
SAI10:45 amSiem Reap–Angkor Intl
50h 15m
2 stops
ORD12:00 amChicago O'Hare Intl
$1,476

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 June 9, 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

Thu 8/27

4:00 pm-9:00 am

2 stops29h 00m

Siem Reap–Angkor Intl

Thu 9/3

12:55 pm-2:20 pm

2 stops37h 25m

$1,099

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 10/5

4:15 pm-9:00 am

2 stops28h 45m

Siem Reap–Angkor Intl

Thu 11/5

1:20 pm-12:55 pm

2 stops36h 35m

$1,126

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 10/27

3:35 pm-9:15 am

2 stops29h 40m

Siem Reap–Angkor Intl

Tue 3/16

7:25 pm-1:55 pm

2 stops30h 30m

$1,141

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 11/10

2:35 pm-9:15 am

2 stops29h 40m

Siem Reap–Angkor Intl

Wed 3/17

7:25 pm-1:55 pm

2 stops30h 30m

$1,216

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 10/25

12:30 am-9:15 am

2 stops44h 45m

Siem Reap–Angkor Intl

Wed 3/17

9:55 am-8:35 pm

2 stops22h 40m

$1,274

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 10/25

12:30 am-9:15 am

2 stops44h 45m

Siem Reap–Angkor Intl

Mon 3/15

9:55 am-8:35 pm

2 stops22h 40m

$1,277

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 8/27

4:00 pm-5:10 pm

3 stops37h 10m

Siem Reap–Angkor Intl

Thu 9/3

9:35 am-2:20 pm

2 stops40h 45m

$1,287

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 10/25

8:45 pm-9:10 pm

2 stops36h 25m

Siem Reap–Angkor Intl

Tue 3/16

11:50 pm-3:45 pm

2 stops27h 55m

$1,298

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 8/26

8:35 pm-12:15 pm

2 stops27h 40m

Siem Reap–Angkor Intl

Wed 9/2

12:55 pm-3:45 pm

2 stops38h 50m

$1,299
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 11/11

11:30 pm-1:15 pm

2 stops24h 45m

Siem Reap–Angkor Intl

Wed 3/17

9:55 am-8:35 pm

2 stops22h 40m

$1,330

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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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.

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

  • How do I get Price Alerts for flights from Chicago O'Hare Intl Airport to Siem Reap?

    Confirm your travel details to search for the latest offers for flights from Chicago O'Hare Intl Airport to Siem Reap. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Chicago O'Hare Intl Airport to Siem Reap with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • 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?

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