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Cheap flights from Seattle to Siem Reap from $238

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 4/10. 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
0 bags

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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
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
$530Singapore Airlines
Thu, Apr 9 - Wed, Apr 22
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
$556Singapore Airlines
Thu, Apr 9 - Wed, Apr 22
Multiple Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Multiple Airlines Logo
4:00 pm - 2:42 pm
SAI
-
SEA
36h 42m
2 stops
$831Multiple Airlines
Thu, Apr 9 - Wed, Apr 22
Multiple Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Multiple Airlines Logo
4:00 pm - 2:42 pm
SAI
-
SEA
36h 42m
2 stops
$856Multiple Airlines
Thu, Apr 9 - Wed, Apr 22
Multiple Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Multiple Airlines Logo
11:50 pm - 9:05 am
SAI
-
SEA
47h 15m
2 stops
$998Multiple Airlines
Sat, Mar 7 - Tue, Apr 7
Singapore Airlines Logo
12:35 pm - 9:40 am
SEA
-
SAI
31h 05m
2 stops
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$999Singapore Airlines
Wed, Jun 24 - Wed, Jul 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
$1,001Multiple Airlines
Wed, Apr 8 - Wed, Apr 22
Multiple Airlines Logo
1:30 am - 6:10 pm
SEA
-
SAI
26h 40m
2 stops
Multiple Airlines Logo
7:30 pm - 6:50 pm
SAI
-
SEA
37h 20m
2 stops
$1,017Multiple Airlines
Wed, Apr 8 - Wed, Apr 22
Multiple Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Multiple Airlines Logo
11:50 pm - 9:05 am
SAI
-
SEA
47h 15m
3 stops
$1,020Multiple Airlines
Sat, Mar 7 - Tue, Apr 7
Singapore Airlines Logo
11:38 am - 9:40 am
SEA
-
SAI
32h 02m
2 stops
Singapore Airlines Logo
4:00 pm - 8:45 am
SAI
-
SEA
30h 45m
1 stop
$1,045Singapore Airlines
Wed, May 20 - Wed, May 27

Singapore Airlines flights from Seattle to Siem Reap

Our best Singapore Airlines deals on Seattle to Siem Reap flight tickets
Singapore Airlines
Apr 9
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Apr 22
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$530
Singapore Airlines
Apr 9
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Apr 22
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$556
Singapore Airlines
Jun 24
SEA12:35 pmSeattle/Tacoma Intl
31h 05m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 1
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$999

United Airlines flights from Seattle to Siem Reap

Our best United Airlines deals on Seattle to Siem Reap flight tickets
United Airlines
Feb 25
SEA7:15 amSeattle/Tacoma Intl
35h 35m
2 stops
SAI9:50 amSiem Reap–Angkor Intl
Mar 11
SAI10:45 amSiem Reap–Angkor Intl
48h 13m
2 stops
SEA8:58 pmSeattle/Tacoma Intl
$833
United Airlines
Feb 27
SEA5:05 amSeattle/Tacoma Intl
37h 45m
2 stops
SAI9:50 amSiem Reap–Angkor Intl
Mar 2
SAI10:45 amSiem Reap–Angkor Intl
46h 41m
2 stops
SEA6:26 pmSeattle/Tacoma Intl
$1,099
United Airlines
Jun 23
SEA1:30 pmSeattle/Tacoma Intl
54h 10m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jun 29
SAI10:30 amSiem Reap–Angkor Intl
50h 40m
2 stops
SEA11:10 pmSeattle/Tacoma Intl
$1,232

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 February 22, 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

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 4/9

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Wed 4/22

10:30 am-8:45 am

1 stop36h 15m

$530

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 4/9

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Wed 4/22

10:30 am-8:45 am

1 stop36h 15m

$556

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 4/9

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Wed 4/22

4:00 pm-2:42 pm

2 stops36h 42m

$831

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 4/9

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Wed 4/22

4:00 pm-2:42 pm

2 stops36h 42m

$856

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 3/7

8:45 am-3:55 pm

1 stop40h 10m

Siem Reap–Angkor Intl

Tue 4/7

11:50 pm-9:05 am

2 stops47h 15m

$998

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 6/24

12:35 pm-9:40 am

2 stops31h 05m

Siem Reap–Angkor Intl

Wed 7/1

10:30 am-8:45 am

1 stop36h 15m

$999

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 4/8

1:15 am-6:45 pm

2 stops27h 30m

Siem Reap–Angkor Intl

Wed 4/22

9:40 am-4:10 pm

2 stops20h 30m

$1,001

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 4/8

1:30 am-6:10 pm

2 stops26h 40m

Siem Reap–Angkor Intl

Wed 4/22

7:30 pm-6:50 pm

2 stops37h 20m

$1,017

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 3/7

8:45 am-3:55 pm

1 stop40h 10m

Siem Reap–Angkor Intl

Tue 4/7

11:50 pm-9:05 am

3 stops47h 15m

$1,020

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 5/20

11:38 am-9:40 am

2 stops32h 02m

Siem Reap–Angkor Intl

Wed 5/27

4:00 pm-8:45 am

1 stop30h 45m

$1,045

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 and United Airlines are the most popular carriers 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

22h 05m

Direct flights

None
The fastest flight from Seattle to Siem Reap takes 22h 05m
There are no direct flights from Seattle to Siem Reap. There are no popular flight routes from Seattle to Siem Reap.
Search flight deals

  • 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 22h 05m.

  • 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 $523Free CancellationRating
8.2
1,463 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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