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Cheap flights from Washington to Siem Reap from $307

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Siem Reap departing on 3/3. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:38 am - 9:40 am
SEA
-
SAI
32h 02m
2 stops
Multiple Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$723Multiple Airlines
수, 5월 20 - 수, 5월 27
Singapore Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Singapore Airlines Logo
10:45 am - 8:10 am
SAI
-
SEA
35h 25m
1 stop
$749Singapore Airlines
목, 3월 5 - 목, 3월 12
Multiple Airlines Logo
11:38 am - 9:40 am
SEA
-
SAI
32h 02m
2 stops
Multiple Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$752Multiple Airlines
수, 5월 20 - 수, 5월 27
Singapore Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$868Singapore Airlines
일, 3월 1 - 수, 4월 1
Multiple Airlines Logo
1:15 am - 6:45 pm
SEA
-
SAI
27h 30m
2 stops
Multiple Airlines Logo
9:40 am - 4:10 pm
SAI
-
SEA
20h 30m
2 stops
$905Multiple Airlines
수, 4월 8 - 수, 4월 22
Singapore Airlines Logo
8:45 am - 9:50 am
SEA
-
SAI
34h 05m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$908Singapore Airlines
화, 3월 3 - 수, 4월 1
Multiple Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Multiple Airlines Logo
10:30 am - 8:50 am
SAI
-
SEA
36h 20m
2 stops
$919Multiple Airlines
일, 7월 19 - 일, 7월 26
Multiple Airlines Logo
1:15 am - 6:45 pm
SEA
-
SAI
27h 30m
2 stops
Multiple Airlines Logo
9:40 am - 4:10 pm
SAI
-
SEA
20h 30m
2 stops
$921Multiple Airlines
화, 4월 14 - 토, 4월 25
Multiple Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Multiple Airlines Logo
10:45 am - 9:31 am
SAI
-
SEA
36h 46m
2 stops
$933Multiple Airlines
목, 3월 5 - 목, 3월 12
Multiple Airlines Logo
11:38 am - 9:40 am
SEA
-
SAI
32h 02m
2 stops
Multiple Airlines Logo
10:30 am - 8:57 am
SAI
-
SEA
36h 27m
2 stops
$934Multiple Airlines
수, 5월 20 - 수, 5월 27

Singapore Airlines flights from State of Washington to Region of Siem Reap

Our best Singapore Airlines deals on State of Washington to Region of Siem Reap flight tickets
Singapore Airlines
Mar 5
SEA8:45 amSeattle/Tacoma Intl
40h 10m
1 stop
SAI3:55 pmSiem Reap–Angkor Intl
Mar 12
SAI10:45 amSiem Reap–Angkor Intl
35h 25m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$749
Singapore Airlines
Mar 1
SEA8:45 amSeattle/Tacoma Intl
40h 10m
1 stop
SAI3:55 pmSiem Reap–Angkor Intl
Apr 1
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$868
Singapore Airlines
Mar 3
SEA8:45 amSeattle/Tacoma Intl
34h 05m
1 stop
SAI9:50 amSiem Reap–Angkor Intl
Apr 1
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$908

United Airlines flights from State of Washington to Region of Siem Reap

Our best United Airlines deals on State of Washington to Region of Siem Reap flight tickets
United Airlines
Feb 18
SEA5:05 amSeattle/Tacoma Intl
37h 45m
2 stops
SAI9:50 amSiem Reap–Angkor Intl
Mar 2
SAI10:45 amSiem Reap–Angkor Intl
49h 16m
2 stops
SEA9:01 pmSeattle/Tacoma Intl
$1,044
United Airlines
Feb 25
SEA5:20 pmSeattle/Tacoma Intl
55h 35m
2 stops
SAI3:55 pmSiem Reap–Angkor Intl
Mar 11
SAI10:45 amSiem Reap–Angkor Intl
48h 13m
2 stops
SEA8:58 pmSeattle/Tacoma Intl
$1,051
United Airlines
Feb 26
SEA5:05 amSeattle/Tacoma Intl
43h 50m
2 stops
SAI3:55 pmSiem Reap–Angkor Intl
Apr 1
SAI10:30 amSiem Reap–Angkor Intl
38h 09m
2 stops
SEA10:39 amSeattle/Tacoma Intl
$1,087

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Region of 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, momondo users made 832,500 searches. Data last updated 2월 9, 2026.
Use the filters below to find and compare flights from Washington to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

수 5/20

11:38 am-9:40 am

2 stops32h 02m

Siem Reap–Angkor Intl

수 5/27

10:30 am-8:45 am

1 stop36h 15m

$723

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

목 3/5

8:45 am-3:55 pm

1 stop40h 10m

Siem Reap–Angkor Intl

목 3/12

10:45 am-8:10 am

1 stop35h 25m

$749

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

수 5/20

11:38 am-9:40 am

2 stops32h 02m

Siem Reap–Angkor Intl

수 5/27

10:30 am-8:45 am

1 stop36h 15m

$752

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

일 3/1

8:45 am-3:55 pm

1 stop40h 10m

Siem Reap–Angkor Intl

수 4/1

10:30 am-8:45 am

1 stop36h 15m

$868

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

수 4/8

1:15 am-6:45 pm

2 stops27h 30m

Siem Reap–Angkor Intl

수 4/22

9:40 am-4:10 pm

2 stops20h 30m

$905

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

화 3/3

8:45 am-9:50 am

1 stop34h 05m

Siem Reap–Angkor Intl

수 4/1

10:30 am-8:45 am

1 stop36h 15m

$908

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

일 7/19

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

일 7/26

10:30 am-8:50 am

2 stops36h 20m

$919

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

화 4/14

1:15 am-6:45 pm

2 stops27h 30m

Siem Reap–Angkor Intl

토 4/25

9:40 am-4:10 pm

2 stops20h 30m

$921

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

목 3/5

8:45 am-3:55 pm

1 stop40h 10m

Siem Reap–Angkor Intl

목 3/12

10:45 am-9:31 am

2 stops36h 46m

$933

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

수 5/20

11:38 am-9:40 am

2 stops32h 02m

Siem Reap–Angkor Intl

수 5/27

10:30 am-8:57 am

2 stops36h 27m

$934

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from State of Washington 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 Washington to Siem Reap?

Singapore Airlines and United Airlines are the most popular carriers operating from Washington to Siem Reap

Cheap State of Washington to Region of Siem Reap flight deals and tips

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

Fastest flight time

33h 25m

Direct flights

None
The fastest flight from State of Washington to Region of Siem Reap takes 33h 25m
There are no direct flights from State of Washington to Region of Siem Reap. There are no popular flight routes from State of Washington to Region of Siem Reap.
Search flight deals

  • When did momondo last update prices for flights from Washington to Siem Reap?

    Prices for flights from Washington to Siem Reap are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington to Siem Reap?

  • How old do you have to be to fly from Washington to Siem Reap?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington 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 State of Washington to Region of Siem Reap

Compare and see reviews for airlines that fly from State of Washington to Region of Siem Reap with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $523Free CancellationRating
8.2
1,452 reviews
Search Singapore Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Siem Reap from Washington.

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

Yes. momondo allows you to filter the results for Washington to Siem Reap flights to just show those with flexible booking policies.

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

Once all potential Washington to Siem Reap flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Washington to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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