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Cheap flights from Seattle to Siem Reap from $512

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 8/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 9:50 am
SEA
-
SAI
34h 05m
1 stop
Singapore Airlines Logo
10:45 am - 7:10 am
SAI
-
SEA
35h 25m
1 stop
$836Singapore Airlines
Tue, Nov 17 - Thu, Dec 3
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$872Singapore Airlines
Thu, Sep 17 - Thu, Oct 1
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$876Singapore Airlines
Thu, Sep 17 - Thu, Oct 1
Singapore Airlines Logo
8:45 am - 9:50 am
SEA
-
SAI
34h 05m
1 stop
Singapore Airlines Logo
10:45 am - 7:10 am
SAI
-
SEA
35h 25m
1 stop
$877Singapore Airlines
Fri, Nov 20 - Tue, Dec 1
Multiple Airlines Logo
4:30 pm - 9:00 am
SEA
-
SAI
26h 30m
2 stops
Multiple Airlines Logo
7:10 pm - 2:25 pm
SAI
-
SEA
33h 15m
2 stops
$1,011Multiple Airlines
Sat, Oct 10 - Fri, Oct 16
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$1,012Singapore Airlines
Thu, Aug 27 - Thu, Sep 10
Multiple Airlines Logo
3:40 pm - 9:15 am
SEA
-
SAI
26h 35m
2 stops
Multiple Airlines Logo
6:40 pm - 1:20 pm
SAI
-
SEA
33h 40m
2 stops
$1,021Multiple Airlines
Thu, Nov 26 - Thu, Dec 3
Multiple Airlines Logo
4:30 pm - 6:55 pm
SEA
-
SAI
36h 25m
2 stops
Multiple Airlines Logo
7:10 pm - 2:25 pm
SAI
-
SEA
33h 15m
2 stops
$1,042Multiple Airlines
Thu, Aug 27 - Thu, Sep 10
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
4:00 pm - 8:45 am
SAI
-
SEA
30h 45m
1 stop
$1,045Singapore Airlines
Sat, Oct 10 - Fri, Oct 16
Multiple Airlines Logo
4:30 pm - 9:00 am
SEA
-
SAI
26h 30m
2 stops
Multiple Airlines Logo
7:10 pm - 2:25 pm
SAI
-
SEA
33h 15m
2 stops
$1,061Multiple Airlines
Sat, Oct 10 - Fri, Oct 16

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Singapore Airlines flights from Seattle to Siem Reap

Our best Singapore Airlines deals on Seattle to Siem Reap flight tickets
Singapore Airlines
Nov 17
SEA8:45 amSeattle/Tacoma Intl
34h 05m
1 stop
SAI9:50 amSiem Reap–Angkor Intl
Dec 3
SAI10:45 amSiem Reap–Angkor Intl
35h 25m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$836
Singapore Airlines
Sep 17
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 1
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$872
Singapore Airlines
Sep 17
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 1
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$876

Qatar Airways flights from Seattle to Siem Reap

Our best Qatar Airways deals on Seattle to Siem Reap flight tickets
Qatar Airways
Aug 4
SEA4:25 pmSeattle/Tacoma Intl
29h 50m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Aug 19
SAI7:35 pmSiem Reap–Angkor Intl
31h 10m
2 stops
SEA12:45 pmSeattle/Tacoma Intl
$1,927
Qatar Airways
Jul 25
SEA4:25 pmSeattle/Tacoma Intl
29h 50m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Aug 7
SAI7:35 pmSiem Reap–Angkor Intl
31h 10m
2 stops
SEA12:45 pmSeattle/Tacoma Intl
$2,070
Qatar Airways
Jul 25
SEA4:25 pmSeattle/Tacoma Intl
29h 50m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Aug 5
SAI12:55 pmSiem Reap–Angkor Intl
37h 50m
2 stops
SEA12:45 pmSeattle/Tacoma Intl
$2,113

momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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, momondo users made 832,500 searches. Data last updated July 21, 2026.
Use the filters below to find and compare flights from Seattle to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 11/17

8:45 am-9:50 am

1 stop34h 05m

Siem Reap–Angkor Intl

Thu 12/3

10:45 am-7:10 am

1 stop35h 25m

$836

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 9/17

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Thu 10/1

10:30 am-8:45 am

1 stop36h 15m

$872

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 9/17

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Thu 10/1

10:30 am-8:45 am

1 stop36h 15m

$876

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 11/20

8:45 am-9:50 am

1 stop34h 05m

Siem Reap–Angkor Intl

Tue 12/1

10:45 am-7:10 am

1 stop35h 25m

$877
Quickest round-trip

SeattleSiem Reap

SEA - SAI

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

$1,011

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 8/27

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Thu 9/10

10:30 am-8:45 am

1 stop36h 15m

$1,012

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 11/26

3:40 pm-9:15 am

2 stops26h 35m

Siem Reap–Angkor Intl

Thu 12/3

6:40 pm-1:20 pm

2 stops33h 40m

$1,021

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 8/27

4:30 pm-6:55 pm

2 stops36h 25m

Siem Reap–Angkor Intl

Thu 9/10

7:10 pm-2:25 pm

2 stops33h 15m

$1,042

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 10/10

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Fri 10/16

4:00 pm-8:45 am

1 stop30h 45m

$1,045

SeattleSiem Reap

SEA - SAI

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

$1,061

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 Seattle to 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–Angkor Intl?

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

When to book flights from Seattle to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Siem Reap (SEA to SAI) flight deals and tips

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

Fastest flight time

26h 30m

Direct flights

None
The fastest flight from Seattle to Siem Reap takes 26h 30m
There are no direct flights from Seattle to Siem Reap. There are no popular flight routes from Seattle to Siem Reap.
Search flight deals

Frequently asked questions about flying from Seattle to Siem Reap

  • How far is Seattle/Tacoma Intl to Siem Reap–Angkor Intl by plane?

    A flight from Seattle/Tacoma Intl to Siem Reap–Angkor Intl will travel around 7350.7 mi. In terms of flight time, this usually takes a little over 26h 30m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Siem Reap–Angkor Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The travel and health documents you'll need for your trip to Siem Reap–Angkor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap–Angkor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Siem Reap?

Best airlines flying from Seattle to Siem Reap

Compare and see reviews for airlines that fly from Seattle to Siem Reap with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $522Free CancellationRating
8.2
1,574 reviews
Search Singapore Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Siem Reap. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Siem Reap from Seattle with this policy.

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?

Yes. momondo can track prices for Seattle to Siem Reap flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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