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Cheap flights from Illinois to Siem Reap from $636

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Siem Reap departing on 9/26. 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

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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.
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,255Emirates
Sun, Apr 26 - Thu, May 7
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
38h 40m
2 stops
$1,256Emirates
Mon, Apr 27 - Fri, May 8
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
62h 40m
2 stops
$1,279Emirates
Sun, Apr 26 - Mon, May 11
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
62h 40m
2 stops
$1,280Emirates
Mon, Apr 27 - Mon, May 11
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,305Emirates
Sun, Apr 26 - Sat, May 9
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,306Emirates
Mon, Apr 27 - Sat, May 9
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,317Emirates
Sun, Apr 26 - Tue, May 5
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
11:50 pm - 3:45 pm
SAI
-
ORD
27h 55m
2 stops
$1,318Emirates
Mon, Apr 27 - Tue, May 5
Emirates Logo
8:35 pm - 9:30 pm
ORD
-
SAI
36h 55m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
62h 40m
2 stops
$1,329Emirates
Thu, Apr 30 - Mon, May 11
Emirates Logo
8:35 pm - 12:20 pm
ORD
-
SAI
27h 45m
2 stops
Emirates Logo
1:05 pm - 3:45 pm
SAI
-
ORD
62h 40m
2 stops
$1,330Emirates
Fri, May 1 - Mon, May 11

Emirates flights from Illinois to Region of Siem Reap

Our best Emirates deals on Illinois to Region of Siem Reap flight tickets
Emirates
Apr 26
ORD8:35 pmChicago O'Hare Intl
36h 55m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
May 7
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,255
Emirates
Apr 27
ORD8:35 pmChicago O'Hare Intl
27h 45m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 8
SAI1:05 pmSiem Reap–Angkor Intl
38h 40m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,256
Emirates
Apr 26
ORD8:35 pmChicago O'Hare Intl
36h 55m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
May 11
SAI1:05 pmSiem Reap–Angkor Intl
62h 40m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,279

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
Apr 30
ORD1:00 pmChicago O'Hare Intl
35h 20m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 9
SAI9:45 amSiem Reap–Angkor Intl
34h 50m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,351
Etihad Airways
Apr 26
ORD1:00 pmChicago O'Hare Intl
35h 20m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 6
SAI9:45 amSiem Reap–Angkor Intl
34h 50m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,377
Etihad Airways
May 13
ORD2:00 pmChicago O'Hare Intl
33h 15m
2 stops
SAI11:15 amSiem Reap–Angkor Intl
May 22
SAI1:05 pmSiem Reap–Angkor Intl
31h 30m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,394

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 April 10, 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

Cheapest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 4/26

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Thu 5/7

11:50 pm-3:45 pm

2 stops27h 55m

$1,255

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 4/27

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Fri 5/8

1:05 pm-3:45 pm

2 stops38h 40m

$1,256

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 4/26

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Mon 5/11

1:05 pm-3:45 pm

2 stops62h 40m

$1,279

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 4/27

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Mon 5/11

1:05 pm-3:45 pm

2 stops62h 40m

$1,280

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 4/26

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Sat 5/9

11:50 pm-3:45 pm

2 stops27h 55m

$1,305
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 4/27

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Sat 5/9

11:50 pm-3:45 pm

2 stops27h 55m

$1,306

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 4/26

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Tue 5/5

11:50 pm-3:45 pm

2 stops27h 55m

$1,317

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 4/27

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Tue 5/5

11:50 pm-3:45 pm

2 stops27h 55m

$1,318

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 4/30

8:35 pm-9:30 pm

2 stops36h 55m

Siem Reap–Angkor Intl

Mon 5/11

1:05 pm-3:45 pm

2 stops62h 40m

$1,329

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 5/1

8:35 pm-12:20 pm

2 stops27h 45m

Siem Reap–Angkor Intl

Mon 5/11

1:05 pm-3:45 pm

2 stops62h 40m

$1,330

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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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

33h 15m

Direct flights

None
The fastest flight from Illinois to Region of Siem Reap takes 33h 15m
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

Frequently asked questions about flying from Illinois to Siem Reap

  • 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.

Frequently asked questions about flying from Illinois to Siem Reap

  • 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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