In terms of precipitation, rainfall in Siem Reap ranges from 0.0 - 260.0 mm per month. September is typically the wettest month, when rainfall can reach 260.0 mm. January is typically the driest time to visit Siem Reap when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.0 C).

What is the cheapest time of day to fly from YOW to SAI?

When flying from Ottawa to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Ottawa to Siem Reap?

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

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

Yes. Cheapflights offers flight deals from Ottawa 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.

C$ 770+ Cheap Flights from Ottawa to Siem Reap, Cambodia

Cheap flight deals from Ottawa to Siem Reap

Enter your travel dates to find the best prices.

One-way

One-way flights from Ottawa to Siem Reap
Search for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Wed 4/115:30 a.m. -

3 stops48h 35m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 770

Mon 9/115:30 a.m. -

3 stops46h 30m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 785

Sun 8/115:40 p.m. -

3 stops53h 20m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 802

Tue 10/115:40 p.m. -

3 stops53h 20m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 848

Fri 6/115:30 a.m. -

3 stops50h 00m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 991

Sat 7/118:40 a.m. -

3 stops45h 25m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 1,024

Thu 5/1110:35 a.m. -

3 stops43h 30m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 1,088

Wed 4/115:10 p.m. -

2 stops37h 20m

Wed 31/1212:00 a.m. -

Nonstop0h 00m

Deal found 28/9C$ 2,419

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSiem Reap

YOW Ottawa - SAI Siem Reap–Angkor Intl

YOWSAI

Ottawa

Tue 10/11

5:40 p.m.-11:00 a.m.

3 stops53h 20m

Siem Reap–Angkor Intl

Wed 31/12

12:00 a.m.-12:00 p.m.

Nonstop0h 00m

C$ 848

Quickest round-trip

OttawaSiem Reap

YOW Ottawa - SAI Siem Reap–Angkor Intl

YOWSAI

Ottawa

Sat 7/11

5:40 p.m.-6:30 p.m.

2 stops36h 50m

Siem Reap–Angkor Intl

Wed 31/12

12:00 a.m.-12:00 p.m.

Nonstop0h 00m

C$ 1,537

OttawaSiem Reap

YOW Ottawa - SAI Siem Reap–Angkor Intl

YOWSAI

Ottawa

Wed 4/11

5:10 p.m.-6:30 p.m.

2 stops37h 20m

Siem Reap–Angkor Intl

Wed 31/12

12:00 a.m.-12:00 p.m.

Nonstop0h 00m

C$ 2,419

OttawaSiem Reap

YOW Ottawa - SAI Siem Reap–Angkor Intl

YOWSAI

Ottawa

Sun 8/11

10:35 a.m.-4:00 p.m.

2 stops65h 25m

Siem Reap–Angkor Intl

Wed 31/12

12:00 a.m.-12:00 p.m.

Nonstop0h 00m

C$ 2,471

OttawaSiem Reap

YOW Ottawa - SAI Siem Reap–Angkor Intl

YOWSAI

Ottawa

Thu 5/11

5:10 p.m.-6:30 p.m.

2 stops37h 20m

Siem Reap–Angkor Intl

Wed 31/12

12:00 a.m.-12:00 p.m.

Nonstop0h 00m

C$ 2,760

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/9

Sorted by cheapest first

Best time to book a flight from Ottawa to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Ottawa with our price prediction graph.

YOW-SAI

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.

Related info for your journey

Can I find deals for flights from Ottawa to Siem Reap that include hotel bookings?
Yes. In addition to deals on Ottawa to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to Siem Reap?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Siem Reap.
Can I find deals for business class flights from Ottawa to Siem Reap?
Yes. Cheapflights offers flight deals from Ottawa 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.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Flights by cabin class

Other flight options

Other flights from Ottawa

Popular flights

Alternative routes for Ottawa to Siem Reap

Pierre Elliott Trudeau Intl to Siem Reap flights

Pearson Intl to Siem Reap flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ottawa to Siem Reap?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Siem Reap from Ottawa today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Siem Reap?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to Siem Reap for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to Siem Reap with no change fees?

Yes! Cheapflights helps users easily find flights from Ottawa to Siem Reap with no change fees.

Can Cheapflights notify me if prices for flights from Ottawa to Siem Reap become cheaper?

Yes, Cheapflights offers price alerts on Ottawa to Siem Reap flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ottawa to Siem Reap

One-way flights from Ottawa to Siem Reap
Search for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Search for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Siem Reap that are best for you.

Best time to book a flight from Ottawa to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Ottawa with our price prediction graph.

Related info for your journey

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

How can I find direct flights from Ottawa to Siem Reap?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Ottawa to Siem Reap by cabin class

Find flights from Ottawa to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ottawa and Siem Reap flights

Browse other Ottawa and Siem Reap flight options. Last updated on 28 September 2026.

Other flights from Ottawa

Browse through other flights departing from Ottawa. Flights are based on user searches made on Cheapflights and were last updated on 28 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

How does Cheapflights help users find flights from Ottawa to Siem Reap?

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Siem Reap?

Can Cheapflights find flights from Ottawa to Siem Reap with no change fees?

Can Cheapflights notify me if prices for flights from Ottawa to Siem Reap become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheap flights from Ottawa to Siem Reap, Cambodia from C$ 770

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ottawa to Siem Reap

One-way flights from Ottawa to Siem ReapSearch for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Search for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Siem Reap that are best for you.

Best time to book a flight from Ottawa to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Ottawa with our price prediction graph.

Related info for your journey

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

How can I find direct flights from Ottawa to Siem Reap?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ottawa to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Ottawa to Siem Reap by cabin class

Find flights from Ottawa to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ottawa and Siem Reap flights

Browse other Ottawa and Siem Reap flight options. Last updated on 28 September 2026.

Other flights from Ottawa

Browse through other flights departing from Ottawa. Flights are based on user searches made on Cheapflights and were last updated on 28 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

How does Cheapflights help users find flights from Ottawa to Siem Reap?

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Siem Reap?

Can Cheapflights find flights from Ottawa to Siem Reap with no change fees?

Can Cheapflights notify me if prices for flights from Ottawa to Siem Reap become cheaper?

100% Free

Book with Flexibility

Travel Smart

One-way flights from Ottawa to Siem Reap
Search for one-way flight options from Ottawa to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 28 September 2026.