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Cheap flights from Seattle to Siem Reap from $493

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 11/17. 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
$860Singapore 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
60h 15m
1 stop
$940Singapore Airlines
Thu, Oct 8 - Sun, Oct 18
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
$947Singapore Airlines
Tue, Nov 17 - Sat, Dec 5
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
$948Singapore 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
60h 15m
1 stop
$949Singapore Airlines
Fri, Oct 9 - Sun, Oct 18
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
$988Singapore Airlines
Thu, Sep 17 - Thu, Oct 1
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
$1,015Multiple Airlines
Mon, Nov 16 - Thu, Dec 3
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
$1,015Multiple Airlines
Sat, Oct 10 - Fri, Oct 16
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
$1,015Multiple Airlines
Mon, Nov 16 - Fri, Dec 4
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
$1,046Multiple 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
$860
Singapore Airlines
Oct 8
SEA10:15 amSeattle/Tacoma Intl
33h 25m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 18
SAI10:30 amSiem Reap–Angkor Intl
60h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$940
Singapore Airlines
Nov 17
SEA8:45 amSeattle/Tacoma Intl
34h 05m
1 stop
SAI9:50 amSiem Reap–Angkor Intl
Dec 5
SAI10:45 amSiem Reap–Angkor Intl
35h 25m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$947

ANA flights from Seattle to Siem Reap

Our best ANA deals on Seattle to Siem Reap flight tickets
ANA
Oct 11
SEA4:30 pmSeattle/Tacoma Intl
58h 40m
2 stops
SAI5:10 pmSiem Reap–Angkor Intl
Oct 16
SAI7:10 pmSiem Reap–Angkor Intl
33h 15m
2 stops
SEA2:25 pmSeattle/Tacoma Intl
$1,055
ANA
Oct 10
SEA4:30 pmSeattle/Tacoma Intl
58h 40m
2 stops
SAI5:10 pmSiem Reap–Angkor Intl
Oct 20
SAI7:10 pmSiem Reap–Angkor Intl
33h 15m
2 stops
SEA2:25 pmSeattle/Tacoma Intl
$1,219

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 August 1, 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

$860

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 10/8

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Sun 10/18

10:30 am-8:45 am

1 stop60h 15m

$940

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 11/17

8:45 am-9:50 am

1 stop34h 05m

Siem Reap–Angkor Intl

Sat 12/5

10:45 am-7:10 am

1 stop35h 25m

$947

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

$948

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 10/9

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Sun 10/18

10:30 am-8:45 am

1 stop60h 15m

$949

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

$988

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 11/16

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

$1,015
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

$1,015

SeattleSiem Reap

SEA - SAI

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

$1,015

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

$1,046

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

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

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 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 $543Free CancellationRating
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?

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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