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Cheap flights from Seattle to Phnom Penh from $881

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 Phnom Penh departing on 12/25. 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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Find the cheapest flights from Seattle to Phnom Penh

Cheap round-trip flights

Logo
11:56 pm - 6:30 amSEA-PNH
40h 34m2 stops
Logo
7:55 am - 11:18 pmPNH-SEA
54h 23m2 stops
$1,675
Find Deal
Fri, Oct 24 - Mon, Nov 10
Logo
11:59 pm - 6:55 amSEA-PNH
40h 56m2 stops
Logo
8:30 am - 1:46 pmPNH-SEA
43h 16m2 stops
$1,763
Find Deal
Sat, Oct 4 - Sat, Oct 25
Logo
11:59 pm - 6:55 amSEA-PNH
40h 56m2 stops
Logo
8:30 am - 12:27 amPNH-SEA
53h 57m2 stops
$1,775
Find Deal
Sat, Oct 4 - Sat, Oct 25
Logo
11:56 pm - 6:30 amSEA-PNH
40h 34m2 stops
Logo
7:55 am - 11:18 pmPNH-SEA
54h 23m2 stops
$2,010
Find Deal
Fri, Oct 24 - Mon, Nov 10
Logo
11:56 pm - 6:55 amSEA-PNH
40h 59m2 stops
Logo
8:30 am - 12:27 amPNH-SEA
53h 57m2 stops
$2,114
Find Deal
Sat, Oct 11 - Sat, Oct 18
Logo
12:34 am - 6:30 amSEA-PNH
39h 56m2 stops
Logo
7:55 am - 1:46 pmPNH-SEA
43h 51m2 stops
$2,145
Find Deal
Sat, Oct 25 - Thu, Oct 30
Logo
12:34 am - 6:55 amSEA-PNH
40h 21m2 stops
Logo
7:50 pm - 10:19 pmPNH-SEA
41h 29m2 stops
$2,147
Find Deal
Wed, Oct 22 - Sat, Jan 31
Logo
12:34 am - 6:30 amSEA-PNH
39h 56m2 stops
Logo
7:55 am - 11:13 pmPNH-SEA
53h 18m2 stops
$2,232
Find Deal
Sat, Oct 25 - Thu, Oct 30
Logo
3:10 pm - 6:25 pmSEA-PNH
36h 15m3 stops
Logo
7:50 pm - 11:30 amPNH-SEA
30h 40m2 stops
$2,241
Find Deal
Thu, Nov 27 - Thu, Dec 4
Logo
11:56 pm - 6:30 amSEA-PNH
40h 34m2 stops
Logo
7:55 am - 11:18 pmPNH-SEA
54h 23m2 stops
$2,308
Find Deal
Fri, Oct 24 - Mon, Nov 10

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Phnom Penh 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 September 15, 2025.
Use the filters below to find and compare flights from Seattle to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 10/24

11:56 pm-6:30 am

2 stops40h 34m

Phnom Penh Pochentong

Mon 11/10

7:55 am-11:18 pm

2 stops54h 23m

$1,675

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/4

11:59 pm-6:55 am

2 stops40h 56m

Phnom Penh Pochentong

Sat 10/25

8:30 am-1:46 pm

2 stops43h 16m

$1,763

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/4

11:59 pm-6:55 am

2 stops40h 56m

Phnom Penh Pochentong

Sat 10/25

8:30 am-12:27 am

2 stops53h 57m

$1,775

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 10/24

11:56 pm-6:30 am

2 stops40h 34m

Phnom Penh Pochentong

Mon 11/10

7:55 am-11:18 pm

2 stops54h 23m

$2,010

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/11

11:56 pm-6:55 am

2 stops40h 59m

Phnom Penh Pochentong

Sat 10/18

8:30 am-12:27 am

2 stops53h 57m

$2,114

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/25

12:34 am-6:30 am

2 stops39h 56m

Phnom Penh Pochentong

Thu 10/30

7:55 am-1:46 pm

2 stops43h 51m

$2,145

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 10/22

12:34 am-6:55 am

2 stops40h 21m

Phnom Penh Pochentong

Sat 1/31

7:50 pm-10:19 pm

2 stops41h 29m

$2,147

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/25

12:34 am-6:30 am

2 stops39h 56m

Phnom Penh Pochentong

Thu 10/30

7:55 am-11:13 pm

2 stops53h 18m

$2,232

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 11/27

3:10 pm-6:25 pm

3 stops36h 15m

Phnom Penh Pochentong

Thu 12/4

7:50 pm-11:30 am

2 stops30h 40m

$2,241

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 10/24

11:56 pm-6:30 am

2 stops40h 34m

Phnom Penh Pochentong

Mon 11/10

7:55 am-11:18 pm

2 stops54h 23m

$2,308

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 Phnom Penh from

How to get the cheapest flight ticket from Seattle to Phnom Penh

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 typical price of a round-trip flight between Seattle and Phnom Penh?

What is the cheapest month to fly to Phnom Penh?

In general, September is the cheapest month to fly from Seattle to Phnom Penh. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $868. If you aren’t able to travel to Phnom Penh during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $898.

What is the cheapest day to depart on your flight to Phnom Penh?

The cheapest day to depart from Seattle to Phnom Penh is on a Tuesday. Travelers who choose to depart for Phnom Penh on a Tuesday will often find tickets for as low as $1,100. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Phnom Penh for around $1,240.

What is the cheapest time of day to depart on your flight to Phnom Penh?

According to our data, the cheapest time of day to fly to Phnom Penh is in the morning. momondo users have found flights departing from Seattle to Phnom Penh in the morning for as low as $1,058. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Phnom Penh are more costly in the afternoon, with an average ticket price of $1,321. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Phnom Penh?

You are more likely to see cheaper flights to Phnom Penh from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around $1,098 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from Seattle for as low as $948 on momondo.

How have Seattle to Phnom Penh flight prices changed over time?

As of September 2025, prices for Seattle to Phnom Penh flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Phnom Penh

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

Cheap Seattle to Phnom Penh (SEA to PNH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Phnom Penh

Direct flights

None
There are no direct flights from Seattle to Phnom Penh. There are no popular flight routes from Seattle to Phnom Penh.
Search flight deals

  • How far is Seattle/Tacoma Intl to Phnom Penh Pochentong by plane?

    There are 7420.4 mi between Seattle/Tacoma Intl and Phnom Penh Pochentong. Flights usually cover this in 32h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Phnom Penh Pochentong Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Phnom Penh Pochentong Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Phnom Penh Pochentong Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Phnom Penh Pochentong Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Phnom Penh Pochentong Airport.

  • What documentation or ID do you need to fly to Phnom Penh Pochentong Airport?

    The travel and health documents you'll need for your trip to Phnom Penh Pochentong 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 Phnom Penh Pochentong 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 Phnom Penh?

Best airlines flying from Seattle to Phnom Penh

Compare and see reviews for airlines that fly from Seattle to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
Philippine AirlinesPriceFrom $693Free CancellationRating
7.2
911 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $702Free CancellationRating
8.1
1,365 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $756Free CancellationRating
8.4
1,139 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $774Free CancellationRating
8.2
479 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $961Free CancellationRating
8.3
767 reviews
Search China Airlines flights
EVA AirPriceFrom $971Free CancellationRating
8.4
1,236 reviews
Search EVA Air flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Phnom Penh?

Finding the right flight to Phnom Penh from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Phnom Penh quick and easy, saving you time and money.

Can I find flights from Seattle to Phnom Penh with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Phnom Penh flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Phnom Penh?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Phnom Penh from Seattle.

I’m not ready to book a flight from Seattle to Phnom Penh right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Phnom Penh 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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