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Cheap flights from Chicago to Siem Reap from $541

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 to Siem Reap departing on 1/17. 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 to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:35 pm - 9:15 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
29h 40m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
7:25 pm - 12:55 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
30h 30m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$1,027Multiple Airlines
Sat, Nov 21 - Sun, Nov 29
Multiple Airlines Logo
2:35 pm - 9:15 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
29h 40m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
7:25 pm - 12:55 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
54h 30m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$1,037Multiple Airlines
Mon, Nov 2 - Sat, Nov 14
Multiple Airlines Logo
11:30 pm - 4:10 pmORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
27h 40m3 stops Taipei City Taiwan Taoyuan Intl Hanoi Noibai Luang Prabang
Multiple Airlines Logo
7:25 pm - 7:35 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
37h 10m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
$1,301Multiple Airlines
Mon, Nov 2 - Sat, Nov 14
Etihad Airways Logo
2:00 pm - 9:00 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
31h 00m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
7:35 pm - 8:35 amSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
49h 00m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,334Etihad Airways
Sun, Aug 23 - Sat, Aug 29
Multiple Airlines Logo
2:00 pm - 11:10 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
33h 10m3 stops Abu Dhabi Zayed Intl Chennai Bangkok Don Mueang Intl
Multiple Airlines Logo
11:50 pm - 9:10 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
33h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
$1,491Multiple Airlines
Sun, Aug 23 - Sat, Aug 29
Multiple Airlines Logo
1:10 pm - 2:25 pmORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
36h 15m2 stops Abu Dhabi Zayed Intl Phnom Penh Techo Intl
Multiple Airlines Logo
10:25 pm - 7:35 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
34h 10m3 stops Phnom Penh Techo Intl Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
$1,519Multiple Airlines
Sat, Nov 21 - Sun, Nov 29
Multiple Airlines Logo
3:59 pm - 8:30 pmORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
39h 31m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Ho Chi Minh City
Multiple Airlines Logo
10:00 am - 5:20 amSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
32h 20m3 stops Ho Chi Minh City Taipei City Taiwan Taoyuan Intl Los Angeles Los Angeles
$1,675Multiple Airlines
Mon, Nov 2 - Sat, Nov 14
Multiple Airlines Logo
2:00 pm - 11:10 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
33h 10m3 stops Abu Dhabi Zayed Intl Chennai Bangkok Don Mueang Intl
Multiple Airlines Logo
10:35 pm - 9:10 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
34h 35m3 stops Ho Chi Minh City Da Nang Taipei City Taiwan Taoyuan Intl
$1,799Multiple Airlines
Sun, Aug 23 - Sat, Aug 29
Multiple Airlines Logo
6:30 pm - 8:45 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
25h 15m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Bangkok Suvarnabhumi
Multiple Airlines Logo
10:25 pm - 7:35 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
34h 10m3 stops Phnom Penh Techo Intl Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
$2,013Multiple Airlines
Sat, Nov 21 - Sun, Nov 29
Multiple Airlines Logo
10:35 am - 9:55 amORD  Chicago O'Hare Intl-SAI Siem Reap–Angkor Intl
34h 20m3 stops Amman Queen Alia Intl Dubai Intl Singapore Changi
Multiple Airlines Logo
4:00 pm - 2:55 pmSAI  Siem Reap–Angkor Intl-ORD Chicago O'Hare Intl
35h 55m2 stops Ho Chi Minh City Dubai Intl
$2,417Multiple Airlines
Sat, Dec 26 - Sat, Jan 2

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Emirates flights from Chicago to Siem Reap

Our best Emirates deals on Chicago to Siem Reap flight tickets
Emirates
Nov 1
ORD7:30 amChicago O'Hare Intl
48h 40m
3 stops
SAI9:10 pmSiem Reap–Angkor Intl
May 11
SAI11:50 pmSiem Reap–Angkor Intl
36h 25m
3 stops
ORD12:15 amChicago O'Hare Intl
$10,070
Emirates
Nov 1
ORD2:20 pmChicago O'Hare Intl
41h 50m
3 stops
SAI9:10 pmSiem Reap–Angkor Intl
May 11
SAI11:50 pmSiem Reap–Angkor Intl
30h 22m
3 stops
ORD6:12 pmChicago O'Hare Intl
$24,509

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 August 12, 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 Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sat 11/21

2:35 pm-9:15 am

2 stops29h 40m

Siem Reap–Angkor Intl

Sun 11/29

7:25 pm-12:55 pm

2 stops30h 30m

$1,027

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Mon 11/2

2:35 pm-9:15 am

2 stops29h 40m

Siem Reap–Angkor Intl

Sat 11/14

7:25 pm-12:55 pm

2 stops54h 30m

$1,037

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Mon 11/2

11:30 pm-4:10 pm

3 stops27h 40m

Siem Reap–Angkor Intl

Sat 11/14

7:25 pm-7:35 pm

2 stops37h 10m

$1,301

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sun 8/23

2:00 pm-9:00 am

2 stops31h 00m

Siem Reap–Angkor Intl

Sat 8/29

7:35 pm-8:35 am

2 stops49h 00m

$1,334

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sun 8/23

2:00 pm-11:10 am

3 stops33h 10m

Siem Reap–Angkor Intl

Sat 8/29

11:50 pm-9:10 pm

2 stops33h 20m

$1,491

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sat 11/21

1:10 pm-2:25 pm

2 stops36h 15m

Siem Reap–Angkor Intl

Sun 11/29

10:25 pm-7:35 pm

3 stops34h 10m

$1,519

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Mon 11/2

3:59 pm-8:30 pm

3 stops39h 31m

Siem Reap–Angkor Intl

Sat 11/14

10:00 am-5:20 am

3 stops32h 20m

$1,675

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sun 8/23

2:00 pm-11:10 am

3 stops33h 10m

Siem Reap–Angkor Intl

Sat 8/29

10:35 pm-9:10 pm

3 stops34h 35m

$1,799
Quickest round-trip

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sat 11/21

6:30 pm-8:45 am

3 stops25h 15m

Siem Reap–Angkor Intl

Sun 11/29

10:25 pm-7:35 pm

3 stops34h 10m

$2,013

ChicagoSiem Reap

ORD Chicago O'Hare Intl - SAI Siem Reap–Angkor Intl

ORDSAI

Chicago O'Hare Intl

Sat 12/26

10:35 am-9:55 am

3 stops34h 20m

Siem Reap–Angkor Intl

Sat 1/2

4:00 pm-2:55 pm

2 stops35h 55m

$2,417

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 to Siem Reap

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

Cheap Chicago to Siem Reap (CHI to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Siem Reap

Fastest flight time

29h 40m

Direct flights

None
The fastest flight from Chicago to Siem Reap takes 29h 40m
There are no direct flights from Chicago to Siem Reap. There are no popular flight routes from Chicago to Siem Reap.
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Frequently asked questions about flying from Chicago to Siem Reap

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

    The distance between Chicago and Siem Reap–Angkor Intl is about 8545.2 mi. A reasonable flight in good conditions will take 29h 40m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to Siem Reap–Angkor Intl Airport.

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

    The travel and health documents you'll need for your trip to Siem Reap–Angkor Intl Airport 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–Angkor Intl Airport. It is always advisable to seek 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 Siem Reap?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Chicago from Siem Reap. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Chicago to Siem Reap with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

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

It is quick and easy to find Chicago to Siem Reap flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Siem Reap that suits you.

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

momondo does allow users to show only those flights to Siem Reap from Chicago which offer a flexible booking policy as well as other useful filters and features.

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?

Yes momondo offers price alerts on flights to Siem Reap from Chicago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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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