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Siem Reap

$754+ Cheap flights from Ontario (ONT) to Siem Reap, Cambodia (SAI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAI
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
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Cheap flight deals from Ontario to Siem Reap

Cheapest flights from Ontario to Siem Reap
Explore the most affordable flight options available from Ontario to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.

This Trip.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:50 pm
ONT
-
SAI
2 stops23h 25m
Multiple Airlines
Thu 11/2610:00 am
SAI
-
ONT
2 stops45h 50m
Multiple Airlines
Deal found 4/5$1,140
This FlightHub deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:45 am
ONT
-
SAI
2 stops42h 15m
Multiple Airlines
Fri 9/119:40 am
SAI
-
ONT
2 stops23h 00m
Multiple Airlines
Deal found 4/9$1,178
This Trip.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2612:10 am
ONT
-
SAI
2 stops23h 05m
Multiple Airlines
Wed 5/279:35 am
SAI
-
ONT
2 stops46h 25m
Multiple Airlines
Deal found 4/9$1,190
This FlightHub deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:10 am
ONT
-
SAI
2 stops28h 35m
Multiple Airlines
Wed 5/201:05 pm
SAI
-
ONT
2 stops42h 55m
Multiple Airlines
Deal found 4/5$1,216
This FlightHub deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:50 pm
ONT
-
SAI
2 stops28h 55m
Multiple Airlines
Sun 11/297:25 pm
SAI
-
ONT
2 stops36h 25m
Multiple Airlines
Deal found 4/5$1,218
This Gotogate deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:10 am
ONT
-
SAI
2 stops28h 35m
Multiple Airlines
Fri 10/237:30 pm
SAI
-
ONT
2 stops36h 30m
Multiple Airlines
Deal found 4/7$1,257
This FlightHub deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:45 am
ONT
-
SAI
2 stops42h 15m
Multiple Airlines
Sat 7/187:10 pm
SAI
-
ONT
2 stops37h 30m
Multiple Airlines
Deal found 4/10$1,596
This Qatar Airways deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:00 am
ONT
-
SAI
3 stops40h 20m
Qatar Airways
Wed 5/277:45 pm
SAI
-
ONT
3 stops38h 11m
Qatar Airways
Deal found 4/9$1,789
This Justfly.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2012:10 am
ONT
-
SAI
2 stops28h 55m
Multiple Airlines
Mon 5/257:45 pm
SAI
-
ONT
2 stops36h 15m
Multiple Airlines
Deal found 4/9$1,797
This FlightHub deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2312:10 am
ONT
-
SAI
2 stops28h 55m
Multiple Airlines
Fri 6/59:45 am
SAI
-
ONT
2 stops22h 15m
Multiple Airlines
Deal found 4/6$1,800
This FlightHub deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:10 am
ONT
-
SAI
2 stops28h 55m
Multiple Airlines
Thu 6/119:40 am
SAI
-
ONT
2 stops22h 20m
Multiple Airlines
Deal found 4/10$1,838
This FlightHub deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2312:10 am
ONT
-
SAI
2 stops28h 55m
Multiple Airlines
Sun 6/77:45 pm
SAI
-
ONT
2 stops36h 15m
Multiple Airlines
Deal found 4/6$1,852

Find flight deals from Ontario to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Siem Reap (SAI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,178
(FlightHub)

One-way from

$754
(SmartFares)

Popular in

June

Cheapest in

April

Average price

$678
Provider with most accurate pricing for Ontario-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Siem Reap–Angkor Intl flights.
Search Deals
From Ontario to Siem Reap–Angkor Intl
Search Deals
One-way flight from Ontario to Siem Reap–Angkor Intl
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($298 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 10, 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

Thu 10/1

12:10 am-6:45 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Tue 10/27

7:25 pm-5:50 pm

2 stops36h 25m

$1,178
Quickest round-trip

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 4/21

12:10 am-6:45 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Thu 5/7

9:45 am-6:00 pm

2 stops22h 15m

$1,216

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 10/6

12:10 am-6:45 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Fri 10/23

7:30 pm-6:00 pm

2 stops36h 30m

$1,257

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 4/27

6:00 am-12:20 pm

3 stops40h 20m

Siem Reap–Angkor Intl

Wed 5/27

7:45 pm-7:56 pm

3 stops38h 11m

$1,789

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Wed 5/20

12:10 am-7:05 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Mon 5/25

7:45 pm-6:00 pm

2 stops36h 15m

$1,797

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Tue 5/26

12:10 am-9:05 am

2 stops42h 55m

Siem Reap–Angkor Intl

Sat 6/27

7:10 pm-6:00 pm

2 stops36h 50m

$1,853

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sat 5/23

12:10 am-7:05 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Sat 6/6

9:45 am-6:00 pm

2 stops22h 15m

$1,862

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Wed 4/22

6:00 am-12:20 pm

3 stops40h 20m

Siem Reap–Angkor Intl

Thu 5/7

7:45 pm-10:40 pm

3 stops40h 55m

$1,948

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sun 5/31

12:10 am-7:05 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Sun 6/7

7:45 pm-6:00 pm

2 stops36h 15m

$1,994

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sun 5/31

12:10 am-7:05 pm

2 stops28h 55m

Siem Reap–Angkor Intl

Sat 6/6

9:45 am-6:00 pm

2 stops22h 15m

$2,005

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

Showing 1-10 of 21 resultsSorted by cheapest first
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Compare providers for flights from Ontario to Siem Reap

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Siem Reap in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Siem Reap flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Siem Reap flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Siem Reap flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Siem Reap

What is the cheapest month to book a flight from Ontario to Siem Reap?

Currently, April is the cheapest month in which you can book a flight from Ontario to Siem Reap (average of $360). Flying from Ontario to Siem Reap in December is currently the most expensive (average of $1,442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Siem Reap?

    Airlines like Qatar Airways fly from Ontario to Siem Reap in about 40h 20m. The time it takes to get you to your destination can typically vary by up to . There are 8155 mi between Ontario and Siem Reap.

  • Can I find deals for flights from Ontario to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Ontario to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Siem Reap.

  • Can I find deals for business class flights from Ontario to Siem Reap?

    Yes. Cheapflights offers flight deals from Ontario to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Siem Reap?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Siem Reap (average of $360). Flying from Ontario to Siem Reap in December is currently the most expensive (average of $1,442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Siem Reap

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