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Cheap flights from Seattle to Phnom Penh from $524

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 5/20. 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

These are some of the best round-trip flight deals from Seattle to Phnom Penh that have been recently found on momondo from popular airlines, departing in the coming months.
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
$709Philippine Airlines
Find Deal
qua, set 3 - ter, set 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
$808Philippine Airlines
Find Deal
qua, set 10 - ter, set 23
China Airlines Logo
1:10 am - 4:05 pmSEA-PNH
24h 55m1 stop
China Airlines Logo
5:10 pm - 7:20 pmPNH-SEA
16h 10m1 stop
$876China Airlines
Find Deal
ter, set 16 - qui, set 25
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
$907Asiana Airlines
Find Deal
qua, set 3 - qua, set 10
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
$909Asiana Airlines
Find Deal
qua, set 3 - qua, set 10
China Airlines Logo
1:10 am - 4:05 pmSEA-PNH
24h 55m1 stop
China Airlines Logo
5:20 pm - 6:15 pmPNH-SEA
15h 55m1 stop
$976China Airlines
Find Deal
ter, out 21 - seg, nov 24
Korean Air Logo
7:20 am - 10:10 pmSEA-PNH
24h 50m2 stops
Korean Air Logo
11:30 pm - 10:40 amPNH-SEA
25h 10m1 stop
$1,032Korean Air
Find Deal
qua, set 3 - qua, set 10
Korean Air Logo
7:20 am - 10:10 pmSEA-PNH
24h 50m2 stops
Korean Air Logo
11:45 pm - 4:20 pmPNH-SEA
31h 35m2 stops
$1,043Korean Air
Find Deal
qua, out 22 - seg, nov 24
EVA Air Logo
1:30 am - 11:15 amSEA-PNH
19h 45m1 stop
EVA Air Logo
12:35 pm - 7:30 pmPNH-SEA
20h 55m1 stop
$1,053EVA Air
Find Deal
dom, set 7 - qui, set 18
EVA Air Logo
1:30 am - 11:15 amSEA-PNH
19h 45m1 stop
EVA Air Logo
12:35 pm - 7:30 pmPNH-SEA
20h 55m1 stop
$1,058EVA Air
Find Deal
dom, set 7 - qui, set 18

Singapore Airlines flights from Seattle to Phnom Penh

Our best Singapore Airlines deals on Seattle to Phnom Penh flight tickets
Singapore Airlines
Sep 10
SEA3:59 pmSeattle/Tacoma Intl
26h 41m
2 stops
PNH8:40 amPhnom Penh Pochentong
Sep 24
PNH2:05 pmPhnom Penh Pochentong
32h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
Singapore Airlines
Oct 25
SEA10:15 amSeattle/Tacoma Intl
37h 35m
1 stop
PNH1:50 pmPhnom Penh Pochentong
Nov 27
PNH2:50 pmPhnom Penh Pochentong
31h 20m
1 stop
SEA7:10 amSeattle/Tacoma Intl
Singapore Airlines
Oct 22
SEA3:35 pmSeattle/Tacoma Intl
27h 05m
2 stops
PNH8:40 amPhnom Penh Pochentong
Nov 24
PNH7:45 pmPhnom Penh Pochentong
26h 25m
1 stop
SEA7:10 amSeattle/Tacoma Intl

Asiana Airlines flights from Seattle to Phnom Penh

Our best Asiana Airlines deals on Seattle to Phnom Penh flight tickets
Asiana Airlines
Sep 3
SEA2:15 pmSeattle/Tacoma Intl
18h 40m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Sep 10
PNH11:55 pmPhnom Penh Pochentong
26h 35m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Asiana Airlines
Sep 3
SEA2:15 pmSeattle/Tacoma Intl
18h 40m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Sep 10
PNH11:55 pmPhnom Penh Pochentong
26h 35m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Asiana Airlines
Sep 8
SEA2:15 pmSeattle/Tacoma Intl
18h 40m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Sep 18
PNH11:55 pmPhnom Penh Pochentong
26h 35m
1 stop
SEA12:30 pmSeattle/Tacoma Intl

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 24 weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around $1,148 when searching 24 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 $1,009 on momondo.

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

As of April 2025, prices for Seattle to Phnom Penh flights are approximately 27% 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

$524

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 $524. The best round-trip flight deal from Seattle to Phnom Penh found on momondo in the last 72 hours is $709.
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)

  • 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
857 reviews
Search Philippine Airlines flights
Korean AirPriceFrom $756Free CancellationRating
8.4
1,066 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $774Free CancellationRating
8.2
442 reviews
Search Asiana Airlines flights
Singapore AirlinesPriceFrom $796Free CancellationRating
8.1
1,292 reviews
Search Singapore Airlines flights
China AirlinesPriceFrom $877Free CancellationRating
8.3
729 reviews
Search China Airlines flights
EVA AirPriceFrom $1,011Free CancellationRating
8.4
1,186 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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