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Cheap flights from Chicago O'Hare Intl Airport to Siem Reap from $560

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 11/25. 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 - 12:15 pm
ORD
-
SAI
32h 15m
2 stops
Multiple Airlines Logo
9:40 am - 1:55 pm
SAI
-
ORD
40h 15m
2 stops
$897Multiple Airlines
Wed, Sep 9 - Wed, Sep 16
Multiple Airlines Logo
4:00 pm - 9:00 am
ORD
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
9:40 am - 2:20 pm
SAI
-
ORD
40h 40m
2 stops
$1,015Multiple Airlines
Tue, Sep 1 - Thu, Sep 10
Multiple Airlines Logo
4:00 pm - 9:00 am
ORD
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
9:40 am - 1:55 pm
SAI
-
ORD
40h 15m
2 stops
$1,065Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
9:40 am - 8:45 pm
SAI
-
ORD
23h 05m
2 stops
$1,128Multiple Airlines
Sun, Aug 30 - Thu, Sep 10
Multiple Airlines Logo
11:30 pm - 6:45 pm
ORD
-
SAI
30h 15m
2 stops
Multiple Airlines Logo
1:20 pm - 7:35 pm
SAI
-
ORD
43h 15m
2 stops
$1,152Multiple Airlines
Thu, Nov 26 - Sun, Dec 6
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
9:40 am - 8:45 pm
SAI
-
ORD
23h 05m
2 stops
$1,166Multiple Airlines
Sun, Aug 30 - Fri, Sep 11
Multiple Airlines Logo
11:30 pm - 4:10 pm
ORD
-
SAI
27h 40m
3 stops
Multiple Airlines Logo
1:20 pm - 7:35 pm
SAI
-
ORD
43h 15m
2 stops
$1,184Multiple Airlines
Thu, Nov 26 - Sun, Dec 6
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
9:40 am - 8:45 pm
SAI
-
ORD
23h 05m
2 stops
$1,204Multiple Airlines
Sat, Sep 5 - Fri, Sep 11
Multiple Airlines Logo
12:30 am - 6:55 pm
ORD
-
SAI
30h 25m
2 stops
Multiple Airlines Logo
9:40 am - 8:45 pm
SAI
-
ORD
23h 05m
2 stops
$1,216Multiple Airlines
Sun, Aug 30 - Wed, Sep 9
Multiple Airlines Logo
11:30 pm - 4:10 pm
ORD
-
SAI
27h 40m
3 stops
Multiple Airlines Logo
9:40 am - 9:00 pm
SAI
-
ORD
23h 20m
2 stops
$1,245Multiple Airlines
Thu, Jan 21 - Sat, May 8

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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
Sep 1
ORD8:35 pmChicago O'Hare Intl
36h 55m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
Sep 8
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,298
Emirates
Sep 2
ORD8:35 pmChicago O'Hare Intl
27h 40m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Sep 7
SAI12:55 pmSiem Reap–Angkor Intl
38h 50m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,299
Emirates
Sep 3
ORD8:35 pmChicago O'Hare Intl
36h 55m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
Sep 7
SAI12:55 pmSiem Reap–Angkor Intl
38h 50m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,348

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

Our best SWISS deals on Chicago O'Hare Intl Airport to Siem Reap flight tickets
SWISS
Oct 4
ORD7:05 pmChicago O'Hare Intl
50h 35m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Oct 15
SAI9:40 amSiem Reap–Angkor Intl
39h 15m
2 stops
ORD12:55 pmChicago O'Hare Intl
$1,307
SWISS
Aug 30
ORD7:05 pmChicago O'Hare Intl
50h 35m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Sep 10
SAI9:40 amSiem Reap–Angkor Intl
38h 55m
2 stops
ORD12:35 pmChicago O'Hare Intl
$1,322

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 July 27, 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

Wed 9/9

4:00 pm-12:15 pm

2 stops32h 15m

Siem Reap–Angkor Intl

Wed 9/16

9:40 am-1:55 pm

2 stops40h 15m

$897

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

Thu 9/10

9:40 am-2:20 pm

2 stops40h 40m

$1,015

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 9/12

4:00 pm-9:00 am

2 stops29h 00m

Siem Reap–Angkor Intl

Sat 9/19

9:40 am-1:55 pm

2 stops40h 15m

$1,065

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 8/30

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Thu 9/10

9:40 am-8:45 pm

2 stops23h 05m

$1,128

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 11/26

11:30 pm-6:45 pm

2 stops30h 15m

Siem Reap–Angkor Intl

Sun 12/6

1:20 pm-7:35 pm

2 stops43h 15m

$1,152

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 8/30

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Fri 9/11

9:40 am-8:45 pm

2 stops23h 05m

$1,166

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 11/26

11:30 pm-4:10 pm

3 stops27h 40m

Siem Reap–Angkor Intl

Sun 12/6

1:20 pm-7:35 pm

2 stops43h 15m

$1,184

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 9/5

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Fri 9/11

9:40 am-8:45 pm

2 stops23h 05m

$1,204

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 8/30

12:30 am-6:55 pm

2 stops30h 25m

Siem Reap–Angkor Intl

Wed 9/9

9:40 am-8:45 pm

2 stops23h 05m

$1,216
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 1/21

11:30 pm-4:10 pm

3 stops27h 40m

Siem Reap–Angkor Intl

Sat 5/8

9:40 am-9:00 pm

2 stops23h 20m

$1,245

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

29h 10m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Siem Reap takes 29h 10m
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 29h 10m.

  • 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