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Cheap flights from Illinois to Siem Reap from $1,310

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 5/20. 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
7:20 pm - 9:30 pm
ORD
-
SAI
38h 10m
2 stops
Multiple Airlines Logo
11:50 pm - 4:50 pm
SAI
-
ORD
53h 00m
2 stops
$1,591Multiple Airlines
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
7:20 pm - 12:15 pm
ORD
-
SAI
28h 55m
2 stops
Multiple Airlines Logo
12:55 pm - 3:05 pm
SAI
-
ORD
38h 10m
2 stops
$1,754Multiple Airlines
Tue, Jun 16 - Sun, Jun 28
Qatar Airways Logo
4:33 pm - 6:55 pm
ORD
-
SAI
38h 22m
3 stops
Qatar Airways Logo
7:35 pm - 3:05 pm
SAI
-
ORD
31h 30m
2 stops
$1,825Qatar Airways
Fri, Jun 12 - Mon, Jun 22
Qatar Airways Logo
7:20 pm - 12:15 pm
ORD
-
SAI
28h 55m
2 stops
Qatar Airways Logo
12:55 pm - 3:05 pm
SAI
-
ORD
38h 10m
2 stops
$1,827Qatar Airways
Thu, Jun 18 - Sun, Jun 28
Multiple Airlines Logo
6:00 am - 9:00 am
ORD
-
SAI
39h 00m
3 stops
Multiple Airlines Logo
7:35 pm - 3:05 pm
SAI
-
ORD
31h 30m
2 stops
$1,834Multiple Airlines
Fri, Jun 12 - Mon, Jun 22
Multiple Airlines Logo
7:20 pm - 6:55 pm
ORD
-
SAI
35h 35m
2 stops
Multiple Airlines Logo
7:35 pm - 3:05 pm
SAI
-
ORD
31h 30m
2 stops
$1,841Multiple Airlines
Fri, Jun 12 - Mon, Jun 22
Qatar Airways Logo
4:33 pm - 6:55 pm
ORD
-
SAI
38h 22m
3 stops
Qatar Airways Logo
7:35 pm - 3:05 pm
SAI
-
ORD
31h 30m
2 stops
$1,845Qatar Airways
Fri, Jun 12 - Mon, Jun 22
Qatar Airways Logo
7:20 pm - 6:55 pm
ORD
-
SAI
35h 35m
2 stops
Qatar Airways Logo
9:40 am - 3:05 pm
SAI
-
ORD
65h 25m
2 stops
$1,850Qatar Airways
Sun, Jun 14 - Tue, Jun 30
Qatar Airways Logo
7:20 pm - 6:55 pm
ORD
-
SAI
35h 35m
2 stops
Qatar Airways Logo
12:55 pm - 3:05 pm
SAI
-
ORD
38h 10m
2 stops
$1,852Qatar Airways
Sun, Jun 14 - Sun, Jun 28
Multiple Airlines Logo
7:20 pm - 9:00 am
ORD
-
SAI
25h 40m
2 stops
Multiple Airlines Logo
7:35 pm - 3:05 pm
SAI
-
ORD
31h 30m
2 stops
$1,853Multiple Airlines
Mon, Jun 15 - Sun, Jun 28

Emirates flights from Illinois to Siem Reap

Our best Emirates deals on Illinois to Siem Reap flight tickets
Emirates
Sep 1
ORD12:47 pmChicago O'Hare Intl
44h 43m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
Sep 19
SAI11:50 pmSiem Reap–Angkor Intl
27h 55m
2 stops
ORD3:45 pmChicago O'Hare Intl
$1,616
Emirates
Oct 22
ORD7:45 amChicago O'Hare Intl
49h 45m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
Nov 8
SAI1:20 pmSiem Reap–Angkor Intl
38h 35m
2 stops
ORD2:55 pmChicago O'Hare Intl
$1,667

Qatar Airways flights from Illinois to Siem Reap

Our best Qatar Airways deals on Illinois to Siem Reap flight tickets
Qatar Airways
Nov 1
ORD3:08 pmChicago O'Hare Intl
29h 07m
3 stops
SAI9:15 amSiem Reap–Angkor Intl
Nov 8
SAI1:20 pmSiem Reap–Angkor Intl
38h 10m
2 stops
ORD2:30 pmChicago O'Hare Intl
$1,762
Qatar Airways
Jun 12
ORD4:33 pmChicago O'Hare Intl
38h 22m
3 stops
SAI6:55 pmSiem Reap–Angkor Intl
Jun 22
SAI7:35 pmSiem Reap–Angkor Intl
31h 30m
2 stops
ORD3:05 pmChicago O'Hare Intl
$1,825
Qatar Airways
Jun 12
ORD4:33 pmChicago O'Hare Intl
38h 22m
3 stops
SAI6:55 pmSiem Reap–Angkor Intl
Jun 22
SAI7:35 pmSiem Reap–Angkor Intl
31h 30m
2 stops
ORD3:05 pmChicago O'Hare Intl
$1,845

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 May 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

Tue 5/12

7:20 pm-9:30 pm

2 stops38h 10m

Siem Reap–Angkor Intl

Tue 5/19

11:50 pm-4:50 pm

2 stops53h 00m

$1,591

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Tue 6/16

7:20 pm-12:15 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Sun 6/28

12:55 pm-3:05 pm

2 stops38h 10m

$1,754

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 6/12

4:33 pm-6:55 pm

3 stops38h 22m

Siem Reap–Angkor Intl

Mon 6/22

7:35 pm-3:05 pm

2 stops31h 30m

$1,825

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Thu 6/18

7:20 pm-12:15 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Sun 6/28

12:55 pm-3:05 pm

2 stops38h 10m

$1,827

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 6/12

6:00 am-9:00 am

3 stops39h 00m

Siem Reap–Angkor Intl

Mon 6/22

7:35 pm-3:05 pm

2 stops31h 30m

$1,834

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 6/12

7:20 pm-6:55 pm

2 stops35h 35m

Siem Reap–Angkor Intl

Mon 6/22

7:35 pm-3:05 pm

2 stops31h 30m

$1,841

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Fri 6/12

4:33 pm-6:55 pm

3 stops38h 22m

Siem Reap–Angkor Intl

Mon 6/22

7:35 pm-3:05 pm

2 stops31h 30m

$1,845

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 6/14

7:20 pm-6:55 pm

2 stops35h 35m

Siem Reap–Angkor Intl

Tue 6/30

9:40 am-3:05 pm

2 stops65h 25m

$1,850

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Sun 6/14

7:20 pm-6:55 pm

2 stops35h 35m

Siem Reap–Angkor Intl

Sun 6/28

12:55 pm-3:05 pm

2 stops38h 10m

$1,852
Quickest round-trip

ChicagoSiem Reap

ORD - SAI

ORDSAI

Chicago O'Hare Intl

Mon 6/15

7:20 pm-9:00 am

2 stops25h 40m

Siem Reap–Angkor Intl

Sun 6/28

7:35 pm-3:05 pm

2 stops31h 30m

$1,853

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from Illinois to Siem Reap

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Illinois to Siem Reap–Angkor Intl?

Emirates is the most popular carrier operating from Illinois to Siem Reap–Angkor Intl

Cheap Illinois to Siem Reap flight deals and tips

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

Fastest flight time

29h 00m

Direct flights

None
The fastest flight from Illinois to Siem Reap takes 29h 00m
There are no direct flights from Illinois to Siem Reap. There are no popular flight routes from Illinois to Siem Reap.
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Frequently asked questions about flying from Illinois to Siem Reap

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

    Prices for flights from Illinois to Siem Reap–Angkor Intl Airport were last updated today.

  • How old do you have to be to fly from Illinois 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 Illinois 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.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Siem Reap from Illinois.

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

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

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?

Of course. momondo tracks the price of Illinois to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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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