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Cheap flights from Illinois to Siem Reap from $1,218

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Siem Reap departing on 4/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:10 pm - 9:00 am
ORD
-
SAI
24h 50m
2 stops
Multiple Airlines Logo
7:30 pm - 9:40 am
SAI
-
ORD
50h 10m
2 stops
$1,218Multiple Airlines
Sat, Apr 11 - Sun, Apr 26
Multiple Airlines Logo
8:10 pm - 9:00 am
ORD
-
SAI
24h 50m
2 stops
Multiple Airlines Logo
7:30 pm - 9:40 am
SAI
-
ORD
50h 10m
2 stops
$1,242Multiple Airlines
Sat, Apr 11 - Sun, Apr 26
Multiple Airlines Logo
8:10 pm - 9:00 am
ORD
-
SAI
24h 50m
2 stops
Multiple Airlines Logo
7:30 pm - 9:40 am
SAI
-
ORD
50h 10m
2 stops
$1,270Multiple Airlines
Sat, Apr 11 - Sun, Apr 26
Singapore Airlines Logo
7:40 pm - 9:40 am
ORD
-
SAI
50h 00m
2 stops
Singapore Airlines Logo
4:00 pm - 5:57 pm
SAI
-
ORD
37h 57m
2 stops
$1,311Singapore Airlines
Wed, Jun 10 - Wed, Aug 5
Multiple Airlines Logo
12:30 am - 4:25 pm
ORD
-
SAI
51h 55m
3 stops
Multiple Airlines Logo
7:30 pm - 9:00 pm
SAI
-
ORD
37h 30m
2 stops
$1,359Multiple Airlines
Fri, Apr 10 - Sun, Apr 26
Emirates Logo
8:45 pm - 12:40 pm
ORD
-
SAI
27h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,404Emirates
Wed, Mar 18 - Tue, Mar 31
Singapore Airlines Logo
7:49 pm - 9:40 am
ORD
-
SAI
49h 51m
2 stops
Singapore Airlines Logo
10:30 am - 11:59 pm
SAI
-
ORD
49h 29m
2 stops
$1,482Singapore Airlines
Sat, Jun 6 - Fri, Jun 19
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
$1,485Emirates
Thu, Mar 19 - Tue, Mar 31
United Airlines Logo
9:15 pm - 9:50 am
ORD
-
SAI
48h 35m
2 stops
United Airlines Logo
10:45 am - 12:59 am
SAI
-
ORD
50h 14m
2 stops
$1,507United Airlines
Sun, Mar 22 - Fri, Mar 27
Multiple Airlines Logo
12:30 am - 4:25 pm
ORD
-
SAI
51h 55m
3 stops
Multiple Airlines Logo
7:10 pm - 9:00 pm
SAI
-
ORD
37h 50m
2 stops
$1,528Multiple Airlines
Fri, Apr 10 - Sun, Apr 26

Singapore Airlines flights from Illinois to Region of Siem Reap

Our best Singapore Airlines deals on Illinois to Region of Siem Reap flight tickets
Singapore Airlines
Jun 10
ORD7:40 pmChicago O'Hare Intl
50h 00m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Aug 5
SAI4:00 pmSiem Reap–Angkor Intl
37h 57m
2 stops
ORD5:57 pmChicago O'Hare Intl
$1,311
Singapore Airlines
Jun 6
ORD7:49 pmChicago O'Hare Intl
49h 51m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jun 19
SAI10:30 amSiem Reap–Angkor Intl
49h 29m
2 stops
ORD11:59 pmChicago O'Hare Intl
$1,482
Singapore Airlines
Jun 10
ORD3:27 pmChicago O'Hare Intl
35h 43m
3 stops
SAI3:10 pmSiem Reap–Angkor Intl
Aug 5
SAI4:00 pmSiem Reap–Angkor Intl
43h 59m
2 stops
ORD11:59 pmChicago O'Hare Intl
$1,939

Etihad Airways flights from Illinois to Region of Siem Reap

Our best Etihad Airways deals on Illinois to Region of Siem Reap flight tickets
Etihad Airways
Mar 22
ORD2:10 pmChicago O'Hare Intl
34h 30m
2 stops
SAI12:40 pmSiem Reap–Angkor Intl
Mar 28
SAI1:20 pmSiem Reap–Angkor Intl
31h 15m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,606
Etihad Airways
Mar 20
ORD2:10 pmChicago O'Hare Intl
31h 05m
2 stops
SAI9:15 amSiem Reap–Angkor Intl
Mar 28
SAI7:25 pmSiem Reap–Angkor Intl
49h 10m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,646
Etihad Airways
Mar 20
ORD2:10 pmChicago O'Hare Intl
34h 30m
2 stops
SAI12:40 pmSiem Reap–Angkor Intl
Mar 27
SAI1:20 pmSiem Reap–Angkor Intl
31h 15m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,653

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 February 23, 2026.
Use the filters below to find and compare flights from Illinois to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/11

8:10 pm-9:00 am

2 stops24h 50m

Siem Reap–Angkor Intl

Sun 4/26

7:30 pm-9:40 am

2 stops50h 10m

$1,218

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/11

8:10 pm-9:00 am

2 stops24h 50m

Siem Reap–Angkor Intl

Sun 4/26

7:30 pm-9:40 am

2 stops50h 10m

$1,242

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 4/11

8:10 pm-9:00 am

2 stops24h 50m

Siem Reap–Angkor Intl

Sun 4/26

7:30 pm-9:40 am

2 stops50h 10m

$1,270

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 6/10

7:40 pm-9:40 am

2 stops50h 00m

Siem Reap–Angkor Intl

Wed 8/5

4:00 pm-5:57 pm

2 stops37h 57m

$1,311

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 4/10

12:30 am-4:25 pm

3 stops51h 55m

Siem Reap–Angkor Intl

Sun 4/26

7:30 pm-9:00 pm

2 stops37h 30m

$1,359

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Wed 3/18

8:45 pm-12:40 pm

2 stops27h 55m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-3:45 pm

2 stops27h 55m

$1,404

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sat 6/6

7:49 pm-9:40 am

2 stops49h 51m

Siem Reap–Angkor Intl

Fri 6/19

10:30 am-11:59 pm

2 stops49h 29m

$1,482

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 3/19

8:45 pm-9:10 pm

2 stops36h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-3:45 pm

2 stops27h 55m

$1,485

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 3/22

9:15 pm-9:50 am

2 stops48h 35m

Siem Reap–Angkor Intl

Fri 3/27

10:45 am-12:59 am

2 stops50h 14m

$1,507

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 4/10

12:30 am-4:25 pm

3 stops51h 55m

Siem Reap–Angkor Intl

Sun 4/26

7:10 pm-9:00 pm

2 stops37h 50m

$1,528

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Illinois to Region of Siem Reap flight deals and tips

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

Fastest flight time

24h 50m

Direct flights

None
The fastest flight from Illinois to Region of Siem Reap takes 24h 50m
There are no direct flights from Illinois to Region of Siem Reap. There are no popular flight routes from Illinois to Region of Siem Reap.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Siem Reap?

    Prices for flights from Illinois to Siem Reap are refreshed on a daily basis.

  • How old do you have to be to fly from Illinois to Siem Reap?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Siem Reap.

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

    The required travel and health documents for your Siem Reap 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • How do I get Price Alerts for flights from Illinois to Region of Siem Reap?

    Confirm your travel details to search for the latest offers for flights from Illinois to Region of 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 Illinois to Region of 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 Illinois to Siem Reap?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Siem Reap. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Siem Reap from Illinois with this policy.

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

Once all potential Illinois to Siem Reap flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Siem Reap from Illinois. 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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Find better results for your trip to Siem Reap

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