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Cheap flights from Washington to Phnom Penh from $758

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Phnom Penh departing on 1/3. 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 Washington to Phnom Penh

Cheap round-trip flights

Singapore Airlines Logo
8:45 am - 6:30 pmSEA-PNH
42h 45m1 stop
Singapore Airlines Logo
2:40 pm - 7:10 amPNH-SEA
31h 30m1 stop
$758Singapore Airlines
Find Deal
Sat, Jan 3 - Sat, Jan 31
Asiana Airlines Logo
2:30 pm - 10:55 pmSEA-PNH
18h 25m1 stop
Asiana Airlines Logo
11:55 pm - 12:30 pmPNH-SEA
26h 35m1 stop
$766Asiana Airlines
Find Deal
Sun, Aug 31 - Sat, Sep 20
China Eastern Logo
7:10 am - 11:15 pmSEA-PNH
26h 05m2 stops
China Eastern Logo
12:10 am - 4:51 pmPNH-SEA
30h 41m2 stops
$807China Eastern
Find Deal
Wed, Aug 27 - Sat, Aug 30
Korean Air Logo
7:28 am - 10:10 pmSEA-PNH
24h 42m2 stops
Korean Air Logo
11:30 pm - 10:40 amPNH-SEA
25h 10m1 stop
$820Korean Air
Find Deal
Tue, Sep 2 - Tue, Sep 9
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
$830Korean Air
Find Deal
Wed, Sep 17 - Wed, Oct 8
Cathay Pacific Logo
11:40 am - 10:15 amSEA-PNH
32h 35m2 stops
Cathay Pacific Logo
6:30 pm - 8:54 amPNH-SEA
28h 24m2 stops
$845Cathay Pacific
Find Deal
Wed, Aug 27 - Sun, Aug 31
Cathay Pacific Logo
11:40 am - 10:15 amSEA-PNH
32h 35m2 stops
Cathay Pacific Logo
6:30 pm - 8:54 amPNH-SEA
28h 24m2 stops
$846Cathay Pacific
Find Deal
Wed, Aug 27 - Sun, Aug 31
China Eastern Logo
7:10 am - 11:15 pmSEA-PNH
26h 05m2 stops
China Eastern Logo
12:10 am - 4:51 pmPNH-SEA
30h 41m2 stops
$849China Eastern
Find Deal
Wed, Aug 27 - Sat, Aug 30
Logo
2:30 pm - 10:55 pmSEA-PNH
18h 25m1 stop
Logo
8:45 pm - 12:30 pmPNH-SEA
29h 45m2 stops
$884
Find Deal
Wed, Aug 27 - Sun, Aug 31
Logo
9:47 pm - 10:55 pmPDX-PNH
59h 08m2 stops
Logo
11:55 pm - 9:47 amPNH-PDX
47h 52m2 stops
$970
Find Deal
Mon, Sep 8 - Tue, Sep 16

Singapore Airlines flights from State of Washington to Phnom Penh

Our best Singapore Airlines deals on State of Washington to Phnom Penh flight tickets
Singapore Airlines
Jan 3
SEA8:45 amSeattle/Tacoma Intl
42h 45m
1 stop
PNH6:30 pmPhnom Penh Pochentong
Jan 31
PNH2:40 pmPhnom Penh Pochentong
31h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$758
Find similar
Singapore Airlines
Oct 30
SEA9:45 amSeattle/Tacoma Intl
38h 00m
1 stop
PNH1:45 pmPhnom Penh Pochentong
Nov 19
PNH2:40 pmPhnom Penh Pochentong
31h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$777
Find similar
Singapore Airlines
Oct 24
SEA10:15 amSeattle/Tacoma Intl
32h 20m
1 stop
PNH8:35 amPhnom Penh Pochentong
Nov 10
PNH9:35 amPhnom Penh Pochentong
36h 35m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$818
Find similar

Asiana Airlines flights from State of Washington to Phnom Penh

Our best Asiana Airlines deals on State of Washington to Phnom Penh flight tickets
Asiana Airlines
Aug 31
SEA2:30 pmSeattle/Tacoma Intl
18h 25m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Sep 20
PNH11:55 pmPhnom Penh Pochentong
26h 35m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$766
Find similar
Asiana Airlines
Aug 24
SEA2:30 pmSeattle/Tacoma Intl
18h 25m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Sep 15
PNH11:55 pmPhnom Penh Pochentong
26h 35m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$770
Find similar
Asiana Airlines
Nov 2
SEA12:10 amSeattle/Tacoma Intl
31h 45m
1 stop
PNH10:55 pmPhnom Penh Pochentong
Nov 14
PNH11:55 pmPhnom Penh Pochentong
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$771
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 August 14, 2025.
Use the filters below to find and compare flights from Washington to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 1/3

8:45 am-6:30 pm

1 stop42h 45m

Phnom Penh Pochentong

Sat 1/31

2:40 pm-7:10 am

1 stop31h 30m

$758

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 8/31

2:30 pm-10:55 pm

1 stop18h 25m

Phnom Penh Pochentong

Sat 9/20

11:55 pm-12:30 pm

1 stop26h 35m

$766

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

7:10 am-11:15 pm

2 stops26h 05m

Phnom Penh Pochentong

Sat 8/30

12:10 am-4:51 pm

2 stops30h 41m

$807

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 9/2

7:28 am-10:10 pm

2 stops24h 42m

Phnom Penh Pochentong

Tue 9/9

11:30 pm-10:40 am

1 stop25h 10m

$820

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/17

12:50 pm-10:10 pm

1 stop19h 20m

Phnom Penh Pochentong

Wed 10/8

11:30 pm-10:40 am

1 stop25h 10m

$830

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

11:40 am-10:15 am

2 stops32h 35m

Phnom Penh Pochentong

Sun 8/31

6:30 pm-8:54 am

2 stops28h 24m

$845

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

11:40 am-10:15 am

2 stops32h 35m

Phnom Penh Pochentong

Sun 8/31

6:30 pm-8:54 am

2 stops28h 24m

$846

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

7:10 am-11:15 pm

2 stops26h 05m

Phnom Penh Pochentong

Sat 8/30

12:10 am-4:51 pm

2 stops30h 41m

$849

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

2:30 pm-10:55 pm

1 stop18h 25m

Phnom Penh Pochentong

Sun 8/31

8:45 pm-12:30 pm

2 stops29h 45m

$884

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 9/8

9:47 pm-10:55 pm

2 stops59h 08m

Phnom Penh Pochentong

Tue 9/16

11:55 pm-9:47 am

2 stops47h 52m

$970

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Phnom Penh from

How to get the cheapest flight ticket from State of Washington 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 State of Washington 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 $917.

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

The cheapest day to depart from State of Washington 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 State of Washington 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 State of Washington 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 State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around $1,112 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from State of Washington for as low as $949 on momondo.

Cheap State of Washington to Phnom Penh flight deals and tips

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

Best Price Found

$2,657

Fastest flight time

18h 25m

Direct flights

None

Airports in Phnom Penh

1 airport
The best one-way flight to Phnom Penh from State of Washington in the past 72 hours is $2,657. The best round-trip flight deal from State of Washington to Phnom Penh found on momondo in the last 72 hours is $758.
The fastest flight from State of Washington to Phnom Penh takes 18h 25m
There are no direct flights from State of Washington 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)
Search flight deals

  • When did momondo last update prices for flights from Washington to Phnom Penh Pochentong Airport?

    Prices for flights from Washington to Phnom Penh Pochentong Airport are updated daily.

  • How many operators does momondo search for flights from Washington to Phnom Penh Pochentong Airport?

  • How old do you have to be to fly from Washington to Phnom Penh Pochentong 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 Washington 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.

Best airlines flying from State of Washington to Phnom Penh

Compare and see reviews for airlines that fly from State of Washington to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
Philippine AirlinesPriceFrom $693Free CancellationRating
7.2
895 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $702Free CancellationRating
8.1
1,346 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $756Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $790Free CancellationRating
8.2
473 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $951Free CancellationRating
8.3
762 reviews
Search China Airlines flights
EVA AirPriceFrom $985Free CancellationRating
8.4
1,233 reviews
Search EVA Air flights

Why use momondo?

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

Finding the right flight to Phnom Penh from Washington 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 Washington to Phnom Penh with flexible booking policies on momondo?

All flight searches from Washington to Phnom Penh on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Washington to Phnom Penh flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Phnom Penh, momondo offers a useful price alert feature which will track prices for flights to Phnom Penh from Washington and alert you when they change.

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