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Cheap flights from Ontario to Siem Reap from $549

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Siem Reap departing on 4/6. 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
0 bags

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Find the cheapest flights from Ontario to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:10 am - 1:15 pm
ONT
-
SAI
23h 05m
2 stops
Multiple Airlines Logo
9:45 am - 6:00 pm
SAI
-
ONT
46h 15m
2 stops
$960Multiple Airlines
Tue, Apr 14 - Wed, Apr 22
Multiple Airlines Logo
11:45 pm - 6:45 pm
ONT
-
SAI
29h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 5:05 pm
SAI
-
ONT
42h 10m
2 stops
$1,067Multiple Airlines
Mon, Aug 31 - Fri, Sep 11
Multiple Airlines Logo
12:10 am - 6:45 pm
ONT
-
SAI
28h 35m
2 stops
Multiple Airlines Logo
7:30 pm - 6:00 pm
SAI
-
ONT
36h 30m
2 stops
$1,083Multiple Airlines
Tue, May 5 - Sun, May 31
Multiple Airlines Logo
11:45 pm - 9:00 am
ONT
-
SAI
43h 15m
2 stops
Multiple Airlines Logo
9:40 am - 5:05 pm
SAI
-
ONT
45h 25m
2 stops
$1,106Multiple Airlines
Mon, Aug 10 - Tue, Sep 1
Multiple Airlines Logo
12:10 am - 6:45 pm
ONT
-
SAI
28h 35m
2 stops
Multiple Airlines Logo
9:40 am - 6:00 pm
SAI
-
ONT
46h 20m
2 stops
$1,503Multiple Airlines
Tue, Jun 9 - Sat, Jun 20
Multiple Airlines Logo
10:45 pm - 6:45 pm
ONT
-
SAI
30h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 5:05 pm
SAI
-
ONT
42h 10m
2 stops
$2,562Multiple Airlines
Fri, Mar 27 - Sun, Apr 5
Multiple Airlines Logo
11:50 pm - 6:45 pm
ONT
-
SAI
28h 55m
2 stops
Multiple Airlines Logo
7:30 pm - 6:00 pm
SAI
-
ONT
36h 30m
2 stops
$2,635Multiple Airlines
Tue, Mar 24 - Wed, Apr 22
Multiple Airlines Logo
7:08 pm - 12:40 pm
ONT
-
SAI
27h 32m
3 stops
Multiple Airlines Logo
9:40 am - 6:00 pm
SAI
-
ONT
22h 20m
2 stops
$3,058Multiple Airlines
Tue, Mar 24 - Wed, Apr 22

momondo Fare Finder

 
Customize your flight search to find flights from Ontario 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 March 13, 2026.
Use the filters below to find and compare flights from Ontario to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 4/14

12:10 am-1:15 pm

2 stops23h 05m

Siem Reap–Angkor Intl

Wed 4/22

9:45 am-6:00 pm

2 stops46h 15m

$960

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 8/31

11:45 pm-6:45 pm

2 stops29h 00m

Siem Reap–Angkor Intl

Fri 9/11

12:55 pm-5:05 pm

2 stops42h 10m

$1,067

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 5/5

12:10 am-6:45 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Sun 5/31

7:30 pm-6:00 pm

2 stops36h 30m

$1,083

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 8/10

11:45 pm-9:00 am

2 stops43h 15m

Siem Reap–Angkor Intl

Tue 9/1

9:40 am-5:05 pm

2 stops45h 25m

$1,106

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 6/9

12:10 am-6:45 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Sat 6/20

9:40 am-6:00 pm

2 stops46h 20m

$1,503

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Fri 3/27

10:45 pm-6:45 pm

2 stops30h 00m

Siem Reap–Angkor Intl

Sun 4/5

12:55 pm-5:05 pm

2 stops42h 10m

$2,562

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 3/24

11:50 pm-6:45 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Wed 4/22

7:30 pm-6:00 pm

2 stops36h 30m

$2,635
Quickest round-trip

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 3/24

7:08 pm-12:40 pm

3 stops27h 32m

Siem Reap–Angkor Intl

Wed 4/22

9:40 am-6:00 pm

2 stops22h 20m

$3,058
Cheapest one-way

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 4/6

1:27 pm-9:40 am

2 stops30h 13m

$549

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 4/13

11:10 pm-6:45 pm

2 stops29h 35m

$557

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from Ontario 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 Ontario to Siem Reap–Angkor Intl?

United Airlines and Qatar Airways are the most popular carriers operating from Ontario to Siem Reap–Angkor Intl

When to book flights from Ontario to Siem Reap

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

Cheap Ontario to Siem Reap (ONT to SAI) flight deals and tips

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

Fastest flight time

22h 50m

Direct flights

None
The fastest flight from Ontario to Siem Reap takes 22h 50m
There are no direct flights from Ontario to Siem Reap. There are no popular flight routes from Ontario to Siem Reap.
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  • How far is Ontario to Siem Reap–Angkor Intl by plane?

    The distance between Ontario and Siem Reap–Angkor Intl is about 8168.6 mi. A reasonable flight in good conditions will take 22h 50m.

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

    Prices for flights from Ontario Airport to Siem Reap–Angkor Intl Airport are updated daily.

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

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

    The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

Finding the right flight to Siem Reap from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Siem Reap quick and easy, saving you time and money.

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

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

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

Once you have performed a search for Ontario to Siem Reap flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Ontario 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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