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Cheap flights from Seattle to Phnom Penh from $400

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 11/4. 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 Phnom Penh

Cheap round-trip flights

Philippine Airlines Logo
11:35 pm - 12:15 amSEA-PNH
34h 40m1 stop
Philippine Airlines Logo
1:15 am - 7:15 pmPNH-SEA
32h 00m1 stop
$677Philippine Airlines
Find Deal
mié., sep. 3 - mar., sep. 9
Philippine Airlines Logo
11:35 pm - 12:15 amSEA-PNH
34h 40m1 stop
Philippine Airlines Logo
1:15 am - 7:15 pmPNH-SEA
32h 00m1 stop
$692Philippine Airlines
Find Deal
mié., oct. 8 - mar., oct. 14
Singapore Airlines Logo
10:15 am - 8:40 amSEA-PNH
32h 25m1 stop
Singapore Airlines Logo
9:35 am - 8:10 amPNH-SEA
36h 35m1 stop
$700Singapore Airlines
Find Deal
jue., oct. 2 - vie., oct. 31
Singapore Airlines Logo
8:45 am - 6:35 pmSEA-PNH
42h 50m1 stop
Singapore Airlines Logo
9:35 am - 7:10 amPNH-SEA
60h 35m1 stop
$721Singapore Airlines
Find Deal
mar., nov. 18 - dom., nov. 30
Korean Air Logo
12:50 pm - 10:10 pmSEA-PNH
19h 20m1 stop
Korean Air Logo
11:30 pm - 10:40 amPNH-SEA
25h 10m1 stop
$749Korean Air
Find Deal
mié., sep. 3 - mar., sep. 9
Korean Air Logo
7:10 am - 10:10 pmSEA-PNH
25h 00m2 stops
Korean Air Logo
11:30 pm - 10:40 amPNH-SEA
25h 10m1 stop
$754Korean Air
Find Deal
mié., sep. 3 - mar., sep. 9
Logo
12:50 pm - 10:55 pmSEA-PNH
20h 05m1 stop
Logo
11:55 pm - 9:00 amPNH-SEA
24h 05m1 stop
$808
Find Deal
mié., oct. 22 - mié., nov. 12
Logo
5:31 pm - 8:40 amSEA-PNH
25h 09m2 stops
Logo
2:05 pm - 12:59 amPNH-SEA
24h 54m2 stops
$811
Find Deal
mié., oct. 8 - mié., oct. 15
Asiana Airlines Logo
2:30 pm - 10:55 pmSEA-PNH
18h 25m1 stop
Asiana Airlines Logo
11:55 pm - 12:45 pmPNH-SEA
26h 50m1 stop
$814Asiana Airlines
Find Deal
jue., ago. 14 - jue., ago. 28
Asiana Airlines Logo
2:15 pm - 10:55 pmSEA-PNH
18h 40m1 stop
Asiana Airlines Logo
11:55 pm - 12:30 pmPNH-SEA
26h 35m1 stop
$815Asiana Airlines
Find Deal
lun., sep. 8 - jue., sep. 18

Korean Air flights from Seattle to Phnom Penh

Our best Korean Air deals on Seattle to Phnom Penh flight tickets
Korean Air
Sep 3
SEA12:50 pmSeattle/Tacoma Intl
19h 20m
1 stop
PNH10:10 pmPhnom Penh Pochentong
Sep 9
PNH11:30 pmPhnom Penh Pochentong
25h 10m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$749
Find similar
Korean Air
Sep 3
SEA7:10 amSeattle/Tacoma Intl
25h 00m
2 stops
PNH10:10 pmPhnom Penh Pochentong
Sep 9
PNH11:30 pmPhnom Penh Pochentong
25h 10m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$754
Find similar
Korean Air
Sep 3
SEA7:28 amSeattle/Tacoma Intl
24h 42m
2 stops
PNH10:10 pmPhnom Penh Pochentong
Sep 9
PNH11:30 pmPhnom Penh Pochentong
31h 21m
2 stops
SEA4:51 pmSeattle/Tacoma Intl
$764
Find similar

Philippine Airlines flights from Seattle to Phnom Penh

Our best Philippine Airlines deals on Seattle to Phnom Penh flight tickets
Philippine Airlines
Sep 3
SEA11:35 pmSeattle/Tacoma Intl
34h 40m
1 stop
PNH12:15 amPhnom Penh Pochentong
Sep 9
PNH1:15 amPhnom Penh Pochentong
32h 00m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$677
Find similar
Philippine Airlines
Oct 8
SEA11:35 pmSeattle/Tacoma Intl
34h 40m
1 stop
PNH12:15 amPhnom Penh Pochentong
Oct 14
PNH1:15 amPhnom Penh Pochentong
32h 00m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$692
Find similar
Philippine Airlines
Oct 22
SEA11:35 pmSeattle/Tacoma Intl
34h 40m
1 stop
PNH12:15 amPhnom Penh Pochentong
Nov 11
PNH1:15 amPhnom Penh Pochentong
32h 20m
1 stop
SEA6:35 pmSeattle/Tacoma Intl
$705
Find similar

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 cheapest month to fly to Phnom Penh?

In general, January 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 $898. If you aren’t able to travel to Phnom Penh during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $926.

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 $1,126 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 $985 on momondo.

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

As of July 2025, prices for Seattle to Phnom Penh flights are approximately 25% 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

Best Price Found

$400

Fastest flight time

18h 10m

Direct flights

None

Airports in Phnom Penh

1 airport
The best one-way flight to Phnom Penh from Seattle in the past 72 hours is $400. The best round-trip flight deal from Seattle to Phnom Penh found on momondo in the last 72 hours is $677.
The fastest flight from Seattle to Phnom Penh takes 18h 10m
There are no direct flights from Seattle to Phnom Penh. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Phnom Penh Pochentong Airport.
There is 1 airport near Phnom Penh: Phnom Penh Pochentong (PNH)
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  • 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 18h 25m, 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
888 reviews
Search Philippine Airlines flights
Korean AirPriceFrom $756Free CancellationRating
8.4
1,105 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $789Free CancellationRating
8.2
454 reviews
Search Asiana Airlines flights
Singapore AirlinesPriceFrom $806Free CancellationRating
8.1
1,324 reviews
Search Singapore Airlines flights
China AirlinesPriceFrom $946Free CancellationRating
8.3
744 reviews
Search China Airlines flights
EVA AirPriceFrom $997Free CancellationRating
8.4
1,215 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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mar. 7/15
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