When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Siem Reap?

Prices for flights from Seattle/Tacoma Intl Airport to Siem Reap refresh daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Siem Reap?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Siem Reap is 1 as of August 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Siem Reap?

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 Seattle/Tacoma Intl Airport to Siem Reap.

What documentation or ID do you need to fly to Siem Reap?

The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$491 Cheap Flights from Seattle to Siem Reap in 2026

Find the cheapest flights from Seattle to Siem Reap

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:45 am - 4:00 pmSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

40h 15m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 25m1 stop Singapore Changi

$750Singapore Airlines

Tue, Nov 3 - Tue, Nov 17

8:45 am - 4:00 pmSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

40h 15m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 25m1 stop Singapore Changi

$891Singapore Airlines

Sat, Jan 23 - Sat, Feb 6

8:40 am - 4:00 pmSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

40h 20m1 stop Singapore Changi

10:45 am - 7:05 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 20m1 stop Singapore Changi

$898Singapore Airlines

Tue, Nov 17 - Thu, Dec 3

8:45 am - 9:55 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

34h 10m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 25m1 stop Singapore Changi

$925Singapore Airlines

Tue, Nov 17 - Thu, Dec 3

8:45 am - 4:00 pmSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

40h 15m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 25m1 stop Singapore Changi

$925Singapore Airlines

Sun, Jan 3 - Mon, Jan 11

8:45 am - 9:55 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

34h 10m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

35h 25m1 stop Singapore Changi

$927Singapore Airlines

Tue, Dec 1 - Tue, Dec 15

8:45 am - 9:55 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

34h 10m1 stop Singapore Changi

10:45 am - 7:10 amSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

59h 25m1 stop Singapore Changi

$985Singapore Airlines

Sun, Jan 3 - Wed, Jan 13

4:30 pm - 9:00 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

26h 30m2 stops Tokyo Haneda Bangkok Suvarnabhumi

7:10 pm - 2:25 pmSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

33h 15m2 stops Ho Chi Minh City Tokyo Haneda

$1,016Multiple Airlines

Sat, Oct 10 - Fri, Oct 16

4:30 pm - 9:00 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

26h 30m2 stops Tokyo Haneda Bangkok Suvarnabhumi

6:40 pm - 1:20 pmSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

33h 40m2 stops Ho Chi Minh City Tokyo Haneda

$1,016Multiple Airlines

Wed, Sep 23 - Mon, Dec 14

3:40 pm - 9:15 amSEA Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl

26h 35m2 stops Tokyo Haneda Bangkok Suvarnabhumi

6:40 pm - 1:20 pmSAI Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl

33h 40m2 stops Ho Chi Minh City Tokyo Haneda

$1,016Multiple Airlines

Mon, Nov 16 - Fri, Dec 4

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Singapore Airlines flights from Seattle to Region of Siem Reap

Our best Singapore Airlines deals on Seattle to Region of Siem Reap flight tickets

Singapore Airlines

Nov 3

SEA8:45 amSeattle/Tacoma Intl

40h 15m

1 stop

SAI4:00 pmSiem Reap–Angkor Intl

Nov 17

SAI10:45 amSiem Reap–Angkor Intl

35h 25m

1 stop

SEA7:10 amSeattle/Tacoma Intl

$750

Singapore Airlines

Jan 23

SEA8:45 amSeattle/Tacoma Intl

40h 15m

1 stop

SAI4:00 pmSiem Reap–Angkor Intl

Feb 6

SAI10:45 amSiem Reap–Angkor Intl

35h 25m

1 stop

SEA7:10 amSeattle/Tacoma Intl

$891

Singapore Airlines

Nov 17

SEA8:40 amSeattle/Tacoma Intl

40h 20m

1 stop

SAI4:00 pmSiem Reap–Angkor Intl

Dec 3

SAI10:45 amSiem Reap–Angkor Intl

35h 20m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$898

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Tue 11/3

8:45 am-4:00 pm

1 stop40h 15m

Siem Reap–Angkor Intl

Tue 11/17

10:45 am-7:10 am

1 stop35h 25m

$750

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Sat 1/23

8:45 am-4:00 pm

1 stop40h 15m

Siem Reap–Angkor Intl

Sat 2/6

10:45 am-7:10 am

1 stop35h 25m

$891

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Tue 11/17

8:40 am-4:00 pm

1 stop40h 20m

Siem Reap–Angkor Intl

Thu 12/3

10:45 am-7:05 am

1 stop35h 20m

$898

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Tue 11/17

8:45 am-9:55 am

1 stop34h 10m

Siem Reap–Angkor Intl

Thu 12/3

10:45 am-7:10 am

1 stop35h 25m

$925

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Sun 1/3

8:45 am-4:00 pm

1 stop40h 15m

Siem Reap–Angkor Intl

Mon 1/11

10:45 am-7:10 am

1 stop35h 25m

$925

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Tue 12/1

8:45 am-9:55 am

1 stop34h 10m

Siem Reap–Angkor Intl

Tue 12/15

10:45 am-7:10 am

1 stop35h 25m

$927

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Sun 1/3

8:45 am-9:55 am

1 stop34h 10m

Siem Reap–Angkor Intl

Wed 1/13

10:45 am-7:10 am

1 stop59h 25m

$985

Quickest round-trip

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Sat 10/10

4:30 pm-9:00 am

2 stops26h 30m

Siem Reap–Angkor Intl

Fri 10/16

7:10 pm-2:25 pm

2 stops33h 15m

$1,016

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Wed 9/23

4:30 pm-9:00 am

2 stops26h 30m

Siem Reap–Angkor Intl

Mon 12/14

6:40 pm-1:20 pm

2 stops33h 40m

$1,016

SeattleSiem Reap

SEA Seattle/Tacoma Intl - SAI Siem Reap–Angkor Intl

SEASAI

Seattle/Tacoma Intl

Mon 11/16

3:40 pm-9:15 am

2 stops26h 35m

Siem Reap–Angkor Intl

Fri 12/4

6:40 pm-1:20 pm

2 stops33h 40m

$1,016

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Region of 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 Seattle/Tacoma Intl to Siem Reap?

Singapore Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Siem Reap

Cheap Seattle to Region of Siem Reap flight deals and tips

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

Best Price Found	$491
Fastest flight time	26h 30m
Direct flights	None

The best one-way flight to Region of Siem Reap from Seattle in the past 72 hours is $491. The best round-trip flight deal from Seattle to Region of Siem Reap found on momondo in the last 72 hours is $750.

The fastest flight from Seattle to Region of Siem Reap takes 26h 30m

There are no direct flights from Seattle to Region of Siem Reap. There are no popular flight routes from Seattle to Region of Siem Reap.

Search flight deals

Frequently asked questions about flying from Seattle to Siem Reap

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Siem Reap?
Prices for flights from Seattle/Tacoma Intl Airport to Siem Reap refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Siem Reap?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Siem Reap is 1 as of August 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Siem Reap?
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 Seattle/Tacoma Intl Airport to Siem Reap.
What documentation or ID do you need to fly to Siem Reap?
The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Seattle to Region of Siem Reap

Compare and see reviews for airlines that fly from Seattle to Region of Siem Reap with momondo

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom $543	Free Cancellation	Rating 8.2 1,584 reviews		Search Singapore Airlines flights

Why use momondo?

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

It is quick and easy to find Seattle to Siem Reap flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Siem Reap that suits you.

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

All flight searches from Seattle to Siem Reap on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Seattle and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Seattle to Siem Reap now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Siem Reap and let you know when they change.

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Flights to Siem Reapfrom $750

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Cheap flights from Seattle to Siem Reap from $491

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Siem Reap departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Singapore Airlines flights from Seattle to Region of Siem Reap

Our best Singapore Airlines deals on Seattle to Region of Siem Reap flight tickets

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How to get the cheapest flight ticket from Seattle to Region of Siem Reap

What is the cheapest airline that flies from Seattle/Tacoma Intl to Siem Reap?

Cheap Seattle to Region of Siem Reap flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Seattle to Siem Reap

Best airlines flying from Seattle to Region of Siem Reap

Compare and see reviews for airlines that fly from Seattle to Region of Siem Reap with momondo

Why use momondo?

An easier way to manage your Region of Siem Reap trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Siem Reap

Popular cities in Siem Reap

Popular flights according to clicks in the last 7 days on momondo

Seattle flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

Fly your favorite airline to Siem Reap

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.

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According to popular flight searches on momondo this year