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Siem Reap

$665+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAI
Mar 27 — Apr 31
Fri 3/27
Fri 4/3
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 February 25, 2026.

This Gurufare deal was found by Cheapflights users on 2/21. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:10 pm
ONT
-
SAI
2 stops29h 35m
Multiple Airlines
Sun 4/1912:55 pm
SAI
-
ONT
2 stops42h 10m
Multiple Airlines
Deal found 2/21$897
This oojo deal was found by Cheapflights users on 2/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1111:10 pm
ONT
-
SAI
2 stops29h 35m
Multiple Airlines
Fri 4/179:40 am
SAI
-
ONT
2 stops21h 25m
Multiple Airlines
Deal found 2/21$906
This Trip.com deal was found by Cheapflights users on 2/23. 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 11/3010:50 pm
ONT
-
SAI
2 stops23h 25m
Multiple Airlines
Mon 12/1410:00 am
SAI
-
ONT
2 stops45h 50m
Multiple Airlines
Deal found 2/23$1,014
This Trip.com deal was found by Cheapflights users on 2/23. 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.
Wed 4/812:10 am
ONT
-
SAI
2 stops28h 00m
Multiple Airlines
Sat 4/187:10 pm
SAI
-
ONT
2 stops60h 50m
Multiple Airlines
Deal found 2/23$1,071
This oojo deal was found by Cheapflights users on 2/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:50 pm
ONT
-
SAI
2 stops22h 50m
Multiple Airlines
Thu 11/269:30 pm
SAI
-
ONT
2 stops34h 20m
Multiple Airlines
Deal found 2/24$1,103
This United Airlines deal was found by Cheapflights users on 2/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:09 am
ONT
-
SAI
2 stops36h 41m
United Airlines
Wed 3/410:45 am
SAI
-
ONT
2 stops45h 56m
United Airlines
Deal found 2/24$1,144
This United Airlines deal was found by Cheapflights users on 2/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:53 pm
ONT
-
SAI
2 stops24h 47m
United Airlines
Wed 9/1610:30 am
SAI
-
ONT
2 stops39h 50m
United Airlines
Deal found 2/22$1,149
This United Airlines deal was found by Cheapflights users on 2/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:10 am
ONT
-
SAI
2 stops42h 45m
United Airlines
Thu 3/124:45 pm
SAI
-
ONT
2 stops38h 56m
United Airlines
Deal found 2/22$1,151
This Trip.com deal was found by Cheapflights users on 2/21. 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 4/512:10 am
ONT
-
SAI
2 stops27h 00m
Multiple Airlines
Mon 4/209:40 am
SAI
-
ONT
2 stops22h 20m
Multiple Airlines
Deal found 2/21$1,415
This Mytrip deal was found by Cheapflights users on 2/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 am
ONT
-
SAI
3 stops26h 15m
Multiple Airlines
Tue 10/279:50 am
SAI
-
ONT
2 stops22h 00m
Multiple Airlines
Deal found 2/23$1,442
This United Airlines deal was found by Cheapflights users on 2/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:40 pm
ONT
-
SAI
2 stops35h 15m
United Airlines
Tue 3/174:45 pm
SAI
-
ONT
2 stops38h 56m
United Airlines
Deal found 2/22$1,529

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 February 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$897
(Gurufare)

One-way from

$665
(Gotogate)

Popular in

December

Cheapest in

August

Average price

$883
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. 6% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 25, 2026.
Use the filters below to find and compare flights from Ontario to Siem Reap that are best for you.

Fly from

Ontario

Fly to

Siem Reap

Route

Depart

Return

Price

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 4/13

11:10 pm-6:45 pm

2 stops29h 35m

Siem Reap–Angkor Intl

Sun 4/19

12:55 pm-5:05 pm

2 stops42h 10m

$897

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sat 4/11

11:10 pm-6:45 pm

2 stops29h 35m

Siem Reap–Angkor Intl

Fri 4/17

9:40 am-5:05 pm

2 stops21h 25m

$906

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sun 4/5

12:10 am-5:10 pm

2 stops27h 00m

Siem Reap–Angkor Intl

Mon 4/20

9:40 am-6:00 pm

2 stops22h 20m

$1,415

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Fri 5/22

11:10 pm-6:45 pm

2 stops29h 35m

Siem Reap–Angkor Intl

Sat 6/13

9:40 am-5:05 pm

2 stops21h 25m

$1,624

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Wed 4/8

12:10 am-4:25 pm

3 stops26h 15m

Siem Reap–Angkor Intl

Sat 4/18

9:40 am-6:00 pm

2 stops22h 20m

$1,647

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Mon 6/29

12:10 am-1:15 pm

2 stops23h 05m

Siem Reap–Angkor Intl

Tue 7/14

10:35 pm-5:40 pm

2 stops33h 05m

$1,905

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Thu 3/26

11:50 pm-9:00 am

2 stops43h 10m

$680

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sat 7/4

12:45 am-6:10 pm

3 stops27h 25m

$987

OntarioSiem Reap

ONT - SAI

ONTSAI

Ontario

Sun 6/7

1:50 pm-9:40 am

2 stops53h 50m

$1,082

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/24

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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, August is the cheapest month in which you can book a flight from Ontario to Siem Reap (average of $631). 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.

  • 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, August is the cheapest month in which you can book a flight from Ontario to Siem Reap (average of $631). 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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