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Phnom Penh

$2,398+ Cheap flights from Boston (BOS) to Phnom Penh (PNH)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — PNH
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
1 adult, Economy
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Cheap flight deals from Boston to Phnom Penh

Cheapest flights from Boston to Phnom Penh
Explore the most affordable flight options available from Boston to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.

This British Airways deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:15 pm
BOS
-
PNH
2 stops50h 45m
British Airways
Fri 10/166:20 pm
PNH
-
BOS
2 stops33h 40m
British Airways
Deal found 5/2$2,398
This British Airways deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:50 pm
BOS
-
PNH
2 stops49h 10m
British Airways
Wed 9/26:20 pm
PNH
-
BOS
2 stops33h 45m
British Airways
Deal found 5/1$2,507
This CheapOair deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:25 am
BOS
-
PNH
3 stops39h 35m
British Airways
Fri 9/116:20 pm
PNH
-
BOS
2 stops33h 45m
British Airways
Deal found 5/2$2,546
This British Airways deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:25 am
BOS
-
PNH
2 stops39h 35m
British Airways
Thu 7/306:20 pm
PNH
-
BOS
2 stops33h 45m
British Airways
Deal found 5/1$2,865

Find flight deals from Boston to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Phnom Penh (PNH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$2,398
(British Airways)

Popular in

January

Cheapest in

November

Average price

$1,449
Provider with most accurate pricing for Boston Logan Intl-Phnom Penh Pochentong flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Phnom Penh Pochentong flights.
Search Deals
From Boston Logan Intl to Phnom Penh Pochentong
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from Boston to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonPhnom Penh

BOS - PNH

BOSPNH

Boston Logan Intl

Mon 9/14

8:15 pm-10:00 am

2 stops50h 45m

Phnom Penh Pochentong

Fri 10/16

6:20 pm-5:00 pm

2 stops33h 40m

$2,398

BostonPhnom Penh

BOS - PNH

BOSPNH

Boston Logan Intl

Mon 8/17

9:50 pm-10:00 am

2 stops49h 10m

Phnom Penh Pochentong

Wed 9/2

6:20 pm-5:05 pm

2 stops33h 45m

$2,507
Quickest round-trip

BostonPhnom Penh

BOS - PNH

BOSPNH

Boston Logan Intl

Mon 8/3

7:25 am-10:00 am

3 stops39h 35m

Phnom Penh Pochentong

Fri 9/11

6:20 pm-5:05 pm

2 stops33h 45m

$2,546

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Sorted by cheapest first

Compare providers for flights from Boston to Phnom Penh

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Phnom Penh in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Phnom Penh flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Phnom Penh flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Phnom Penh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Phnom Penh flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Phnom Penh flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Phnom Penh

How far ahead should I book a flight from Boston to Phnom Penh?

The price you pay for your flight from Boston to Phnom Penh may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to Phnom Penh?

Currently, November is the cheapest month in which you can book a flight from Boston to Phnom Penh (average of $865). Flying from Boston to Phnom Penh in January is currently the most expensive (average of $1,493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Boston to Phnom Penh?

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phnom Penh. Reviews last updated May 5, 2026.
See what other customers who have flown with Korean Air and Cathay Pacific from Boston to Phnom Penh have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,216 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Cathay Pacific
7.6
Good
1,313 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Related info for your journey

Find useful and relevant information for your journey from Boston to Phnom Penh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Phnom Penh?

    For as low as $2,398, British Airways can have you in Phnom Penh from Boston in 50h 45m. The distance from Boston to Phnom Penh is about 8696 mi.

  • What are the cheapest airlines flying from Boston to Phnom Penh round-trip?

    Flying on Korean Air is currently your cheapest option to Phnom Penh, with prices starting at $711. Another option worth looking into is Cathay Pacific, starting at $879 round trip. Korean Air is priced at 37% lower than the current average price of a flight leaving 3 months from now.

  • Where are the most common layover locations when flying from Boston to Phnom Penh?

    Boston to Phnom Penh flights have a layover in Seoul most of the time.

  • What are some popular things to do or see while on a layover in Seoul?

    If you're on a layover in Seoul and looking for things to do, consider visiting Dongdaemun Market, Lotte World, or Gwanghwamun. Dongdaemun Market, Lotte World, and Gwanghwamun can be visited by traveling about 31.6 mi, 35.7 mi, and 30.1 mi respectively from Incheon Intl. Those looking to explore during their layover in Seoul can rent a car from Incheon Intl for about $49 per day.

  • Where are the least popular layover locations for Boston to Phnom Penh flights?

    Boston to Phnom Penh flights have a layover in Hong Kong least often.

  • Can I find deals for flights from Boston to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on Boston to Phnom Penh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Phnom Penh.

  • Can I find deals for business class flights from Boston to Phnom Penh?

    Yes. Cheapflights offers flight deals from Boston to Phnom Penh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Phnom Penh?

    Currently, November is the cheapest month in which you can book a flight from Boston to Phnom Penh (average of $865). Flying from Boston to Phnom Penh in January is currently the most expensive (average of $1,493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boston to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Siem Reap flights

Top 2 airlines flying from Boston to Phnom Penh

Discover the top 2 airlines that operate flights from Boston to Phnom Penh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$711Average$952FlexibilityNo cancel feeOn-time81%
Cathay PacificCheapest$879Average$1,164FlexibilityNo cancel feeOn-time72%

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