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Cheap flights from Seattle to Siem Reap from $547

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 4/26. 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.
Multiple Airlines Logo
1:30 am - 6:45 pm
SEA
-
SAI
27h 15m
2 stops
Multiple Airlines Logo
7:45 pm - 6:50 pm
SAI
-
SEA
37h 05m
2 stops
$1,177Multiple Airlines
Tue, Apr 21 - Wed, May 6
Multiple Airlines Logo
1:30 am - 6:45 pm
SEA
-
SAI
27h 15m
2 stops
Multiple Airlines Logo
1:05 pm - 6:50 pm
SAI
-
SEA
19h 45m
2 stops
$1,235Multiple Airlines
Mon, Apr 20 - Thu, May 7
Multiple Airlines Logo
1:30 am - 4:25 pm
SEA
-
SAI
24h 55m
3 stops
Multiple Airlines Logo
7:45 pm - 6:50 pm
SAI
-
SEA
37h 05m
2 stops
$1,253Multiple Airlines
Tue, Apr 21 - Wed, May 6
Emirates Logo
5:15 pm - 9:30 pm
SEA
-
SAI
38h 15m
2 stops
Emirates Logo
11:50 pm - 1:25 pm
SAI
-
SEA
27h 35m
2 stops
$1,255Emirates
Sun, Apr 19 - Tue, May 5
Emirates Logo
5:15 pm - 12:20 pm
SEA
-
SAI
29h 05m
2 stops
Emirates Logo
1:05 pm - 1:25 pm
SAI
-
SEA
38h 20m
2 stops
$1,256Emirates
Wed, May 20 - Wed, May 27
Multiple Airlines Logo
1:30 am - 5:10 pm
SEA
-
SAI
25h 40m
2 stops
Multiple Airlines Logo
1:05 pm - 6:50 pm
SAI
-
SEA
19h 45m
2 stops
$1,268Multiple Airlines
Wed, Apr 22 - Thu, May 7
Multiple Airlines Logo
1:30 am - 6:45 pm
SEA
-
SAI
27h 15m
2 stops
Multiple Airlines Logo
1:05 pm - 7:30 pm
SAI
-
SEA
20h 25m
2 stops
$1,270Multiple Airlines
Sun, Apr 19 - Wed, May 6
Emirates Logo
5:15 pm - 12:20 pm
SEA
-
SAI
53h 05m
2 stops
Emirates Logo
11:50 pm - 1:25 pm
SAI
-
SEA
27h 35m
2 stops
$1,279Emirates
Wed, Apr 22 - Tue, May 5
Emirates Logo
5:15 pm - 12:20 pm
SEA
-
SAI
53h 05m
2 stops
Emirates Logo
1:05 pm - 1:25 pm
SAI
-
SEA
38h 20m
2 stops
$1,280Emirates
Wed, Apr 22 - Fri, May 8
Emirates Logo
5:15 pm - 9:30 pm
SEA
-
SAI
38h 15m
2 stops
Emirates Logo
11:50 pm - 1:25 pm
SAI
-
SEA
27h 35m
2 stops
$1,305Emirates
Thu, May 14 - Thu, May 28

Singapore Airlines flights from Seattle to Siem Reap

Our best Singapore Airlines deals on Seattle to Siem Reap flight tickets
Singapore Airlines
Sep 17
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 7
SAI10:30 amSiem Reap–Angkor Intl
36h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$666
Singapore Airlines
Sep 17
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 4
SAI4:00 pmSiem Reap–Angkor Intl
30h 52m
2 stops
SEA8:52 amSeattle/Tacoma Intl
$811
Singapore Airlines
Sep 17
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 4
SAI4:00 pmSiem Reap–Angkor Intl
54h 45m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$870

Emirates flights from Seattle to Siem Reap

Our best Emirates deals on Seattle to Siem Reap flight tickets
Emirates
Apr 19
SEA5:15 pmSeattle/Tacoma Intl
38h 15m
2 stops
SAI9:30 pmSiem Reap–Angkor Intl
May 5
SAI11:50 pmSiem Reap–Angkor Intl
27h 35m
2 stops
SEA1:25 pmSeattle/Tacoma Intl
$1,255
Emirates
Apr 20
SEA5:15 pmSeattle/Tacoma Intl
29h 05m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 7
SAI11:50 pmSiem Reap–Angkor Intl
27h 35m
2 stops
SEA1:25 pmSeattle/Tacoma Intl
$1,256
Emirates
Apr 22
SEA5:15 pmSeattle/Tacoma Intl
53h 05m
2 stops
SAI12:20 pmSiem Reap–Angkor Intl
May 5
SAI11:50 pmSiem Reap–Angkor Intl
27h 35m
2 stops
SEA1:25 pmSeattle/Tacoma Intl
$1,279

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 April 7, 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 4/21

1:30 am-6:45 pm

2 stops27h 15m

Siem Reap–Angkor Intl

Wed 5/6

7:45 pm-6:50 pm

2 stops37h 05m

$1,177

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 4/20

1:30 am-6:45 pm

2 stops27h 15m

Siem Reap–Angkor Intl

Thu 5/7

1:05 pm-6:50 pm

2 stops19h 45m

$1,235

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 4/21

1:30 am-4:25 pm

3 stops24h 55m

Siem Reap–Angkor Intl

Wed 5/6

7:45 pm-6:50 pm

2 stops37h 05m

$1,253

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sun 4/19

5:15 pm-9:30 pm

2 stops38h 15m

Siem Reap–Angkor Intl

Tue 5/5

11:50 pm-1:25 pm

2 stops27h 35m

$1,255

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 5/20

5:15 pm-12:20 pm

2 stops29h 05m

Siem Reap–Angkor Intl

Wed 5/27

1:05 pm-1:25 pm

2 stops38h 20m

$1,256
Quickest round-trip

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 4/22

1:30 am-5:10 pm

2 stops25h 40m

Siem Reap–Angkor Intl

Thu 5/7

1:05 pm-6:50 pm

2 stops19h 45m

$1,268

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sun 4/19

1:30 am-6:45 pm

2 stops27h 15m

Siem Reap–Angkor Intl

Wed 5/6

1:05 pm-7:30 pm

2 stops20h 25m

$1,270

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 4/22

5:15 pm-12:20 pm

2 stops53h 05m

Siem Reap–Angkor Intl

Tue 5/5

11:50 pm-1:25 pm

2 stops27h 35m

$1,279

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 4/22

5:15 pm-12:20 pm

2 stops53h 05m

Siem Reap–Angkor Intl

Fri 5/8

1:05 pm-1:25 pm

2 stops38h 20m

$1,280

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 5/14

5:15 pm-9:30 pm

2 stops38h 15m

Siem Reap–Angkor Intl

Thu 5/28

11:50 pm-1:25 pm

2 stops27h 35m

$1,305

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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

27h 15m

Direct flights

None
The fastest flight from Seattle to Siem Reap takes 27h 15m
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 27h 15m.

  • 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
1,490 reviews
Search Singapore Airlines flights

Frequently asked questions about flying from Seattle to Siem Reap

  • How do I get Price Alerts for flights from Seattle to Siem Reap?

    Confirm your travel details to search for the latest offers for flights from Seattle to Siem Reap. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Seattle to Siem Reap with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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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