In terms of precipitation, rainfall in Region of Siem Reap ranges from 0.0 - 10.2 inches per month. September is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit Region of Siem Reap when rainfall is around 0.0 in.

If weather is an important factor for your trip to Region of 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 84.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 75.2 F).

What is the cheapest time of day to fly from SEA to SI?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Region of Siem Reap as you normally would.

What airport do you fly from for flights from Seattle to Siem Reap?

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Siem Reap.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Seattle 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.

Find Flights from Seattle to Siem Reap

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Seattle to Siem Reap with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Siem Reap

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars

Provider with most accurate pricing for Seattle/Tacoma Intl-Siem Reap–Angkor Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Siem Reap–Angkor Intl flights.

Search Deals

Reviews of airlines servicing Siem Reap

Get a feel of what it's like to fly with Singapore Airlines from Seattle to Siem Reap by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Singapore Airlines

8.1

Very good

1,391 reviews

Reviews

1 / 20

2.0

Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Singapore Airlines

8.1

Very good

1,391 reviews

Singapore Airlines

8.1

Very good

1,391 reviews

Reviews

1 / 20

2.0

Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Related info for your journey

What airport do you fly from for flights from Seattle to Siem Reap?
Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Siem Reap.
Can I find deals for flights from Seattle to Siem Reap that include hotel bookings?
Yes. In addition to deals on Seattle to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Siem Reap?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Siem Reap.
Can I find deals for business class flights from Seattle to Siem Reap?
Yes. Cheapflights offers flight deals from Seattle 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Seattle to Siem Reap

Seattle to Phnom Penh flights

Portland to Phnom Penh flights

Spokane to Phnom Penh flights

Top airline flying from Seattle to Siem Reap

Airline	Cheapest	Average	Flexibility	On-time
Singapore Airlines	Cheapest$523	Average$1,130	FlexibilityNo cancel fee	On-time81%

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.

Find cheap flights from Seattle to Siem Reap with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Siem Reap

Keep the following information in mind while searching for Seattle to Siem Reap flight deals. Data was last updated November 5, 2025.

Most accurate provider

Most trusted provider

Reviews of airlines servicing Siem Reap

Get a feel of what it's like to fly with Singapore Airlines from Seattle to Siem Reap by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airport do you fly from for flights from Seattle to Siem Reap?

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

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

Can I find deals for business class flights from Seattle 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 Seattle 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 Seattle to Siem Reap by cabin class

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

Seattle and Siem Reap flights

Browse other Seattle and Siem Reap flight options. Last updated on November 5, 2025.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2025

Top airline flying from Seattle to Siem Reap

100% Free

Book with Flexibility

Travel Smart

Cheap flights from Seattle (SEA) to Siem Reap

Find cheap flights from Seattle to Siem Reap with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Siem Reap

Keep the following information in mind while searching for Seattle to Siem Reap flight deals. Data was last updated November 5, 2025.

Most accurate provider

Most trusted provider

Reviews of airlines servicing Siem Reap

Get a feel of what it's like to fly with Singapore Airlines from Seattle to Siem Reap by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airport do you fly from for flights from Seattle to Siem Reap?

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

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

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

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

Top airline flying from Seattle to Siem Reap

100% Free

Book with Flexibility

Travel Smart