Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from the United States to Phnom Penh from $2,762

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Phnom Penh departing on 7/29. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from the United States to Phnom Penh

Recent round-trip flight deals from the United States to Phnom Penh

Enter your travel dates to find the best prices.
British Airways Logo
7:15 pm - 10:00 am
IAD
-
PNH
51h 45m
2 stops
British Airways Logo
6:20 pm - 5:25 pm
PNH
-
IAD
34h 05m
2 stops
$2,762British Airways
Wed, Jul 29 - Sun, Aug 9
British Airways Logo
10:25 pm - 10:00 am
IAD
-
PNH
48h 35m
2 stops
British Airways Logo
6:20 pm - 3:50 pm
PNH
-
IAD
32h 30m
2 stops
$2,916British Airways
Thu, Jul 30 - Tue, Aug 11
British Airways Logo
5:40 pm - 10:00 am
IAD
-
PNH
53h 20m
2 stops
British Airways Logo
6:20 pm - 7:10 pm
PNH
-
IAD
35h 50m
3 stops
$3,026British Airways
Wed, Jul 29 - Sun, Aug 9
British Airways Logo
10:25 pm - 10:00 am
IAD
-
PNH
48h 35m
2 stops
British Airways Logo
6:20 pm - 7:10 pm
PNH
-
IAD
35h 50m
3 stops
$3,137British Airways
Thu, Jul 30 - Tue, Aug 11
British Airways Logo
5:40 pm - 10:00 am
IAD
-
PNH
29h 20m
3 stops
British Airways Logo
6:20 pm - 3:45 pm
PNH
-
IAD
32h 25m
3 stops
$7,887British Airways
Wed, Jul 29 - Sun, Aug 9
British Airways Logo
5:40 pm - 10:00 am
IAD
-
PNH
29h 20m
3 stops
British Airways Logo
6:20 pm - 7:10 pm
PNH
-
IAD
35h 50m
3 stops
$7,942British Airways
Thu, Jul 30 - Tue, Aug 11

British Airways flights from United States to Phnom Penh

Our best British Airways deals on United States to Phnom Penh flight tickets
British Airways
Jul 30
IAD10:25 pmWashington, D.C. Dulles Intl
48h 35m
2 stops
PNH10:00 amPhnom Penh Pochentong
Aug 11
PNH6:20 pmPhnom Penh Pochentong
37h 00m
2 stops
IAD8:20 pmWashington, D.C. Dulles Intl
$2,916
British Airways
Jul 30
IAD5:40 pmWashington, D.C. Dulles Intl
53h 20m
2 stops
PNH10:00 amPhnom Penh Pochentong
Aug 11
PNH6:20 pmPhnom Penh Pochentong
35h 50m
3 stops
IAD7:10 pmWashington, D.C. Dulles Intl
$3,137
British Airways
Jul 30
IAD5:40 pmWashington, D.C. Dulles Intl
29h 20m
3 stops
PNH10:00 amPhnom Penh Pochentong
Aug 11
PNH6:20 pmPhnom Penh Pochentong
32h 25m
3 stops
IAD3:45 pmWashington, D.C. Dulles Intl
$7,942

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 February 3, 2026.
Use the filters below to find and compare flights from the United States to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Wed 7/29

7:15 pm-10:00 am

2 stops51h 45m

Phnom Penh Pochentong

Sun 8/9

6:20 pm-5:25 pm

2 stops34h 05m

$2,762

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Thu 7/30

10:25 pm-10:00 am

2 stops48h 35m

Phnom Penh Pochentong

Tue 8/11

6:20 pm-3:50 pm

2 stops32h 30m

$2,916

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Wed 7/29

5:40 pm-10:00 am

2 stops53h 20m

Phnom Penh Pochentong

Sun 8/9

6:20 pm-7:10 pm

3 stops35h 50m

$3,026

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Thu 7/30

10:25 pm-10:00 am

2 stops48h 35m

Phnom Penh Pochentong

Tue 8/11

6:20 pm-7:10 pm

3 stops35h 50m

$3,137

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Wed 7/29

5:40 pm-10:00 am

3 stops29h 20m

Phnom Penh Pochentong

Sun 8/9

6:20 pm-3:45 pm

3 stops32h 25m

$7,887

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Thu 7/30

5:40 pm-10:00 am

3 stops29h 20m

Phnom Penh Pochentong

Tue 8/11

6:20 pm-7:10 pm

3 stops35h 50m

$7,942

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Phnom Penh from

How to get the cheapest flight ticket from United States 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, February is the cheapest month to fly from United States to Phnom Penh. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $981. If you aren’t able to travel to Phnom Penh during the month of February, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,006.

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

You are more likely to see cheaper flights to Phnom Penh from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Phnom Penh for around $1,236 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phnom Penh from United States for as low as $769 on momondo.

Can stopping save me money on United States to Phnom Penh flights?

You could potentially save up to 17% on your flight if you consider stops on a United States to Phnom Penh flight.

Cheap United States to Phnom Penh flight deals and tips

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

Fastest flight time

24h 55m

Direct flights

None
The fastest flight from United States to Phnom Penh takes 24h 55m
There are no direct flights from United States to Phnom Penh. There are no popular flight routes from United States to Phnom Penh.
Search flight deals

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

    Prices for flights from United States to Phnom Penh Pochentong Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from United States to Phnom Penh Pochentong Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Phnom Penh Pochentong Airport.

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

    The necessary travel and health documents for your Phnom Penh Pochentong Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United States to Phnom Penh

Compare and see reviews for airlines that fly from United States to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
China SouthernPriceFrom $560Free CancellationRating
7.3
136 reviews
Search China Southern flights
Singapore AirlinesPriceFrom $565Free CancellationRating
8.2
1,443 reviews
Search Singapore Airlines flights
China EasternPriceFrom $643Free CancellationRating
7.2
192 reviews
Search China Eastern flights
Philippine AirlinesPriceFrom $661Free CancellationRating
7.3
955 reviews
Search Philippine Airlines flights
Cathay PacificPriceFrom $695Free CancellationRating
7.6
1,157 reviews
Search Cathay Pacific flights
Asiana AirlinesPriceFrom $707Free CancellationRating
8.1
502 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $711Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
Vietnam AirlinesPriceFrom $736Free CancellationRating
7.6
224 reviews
Search Vietnam Airlines flights
China AirlinesPriceFrom $766Free CancellationRating
8.3
803 reviews
Search China Airlines flights
EVA AirPriceFrom $861Free CancellationRating
8.4
1,342 reviews
Search EVA Air flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United States to Phnom Penh. momondo saves you time and could save you money on your trip.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United States to Phnom Penh.

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

Price alerts on flights to Phnom Penh from United States are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Phnom Penh trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/5
Thu 3/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Cambodia