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Siem Reap

$1,136+ Cheap flights from Boston (BOS) to Siem Reap, Cambodia (SAI)

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAI
Mar 27 — Apr 31
Fri 3/27
Fri 4/3
1 adult, Economy
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Cheap flight deals from Boston to Siem Reap

Cheapest flights from Boston to Siem Reap
Explore the most affordable flight options available from Boston to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 25, 2026.

This oojo deal was found by Cheapflights users on 2/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/181:45 am
BOS
-
SAI
2 stops30h 00m
Multiple Airlines
Thu 10/291:20 pm
SAI
-
BOS
2 stops44h 40m
Multiple Airlines
Deal found 2/23$1,136
This Booking.com deal was found by Cheapflights users on 2/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:25 pm
BOS
-
SAI
2 stops62h 30m
Multiple Airlines
Sat 10/242:50 pm
SAI
-
BOS
2 stops35h 20m
Multiple Airlines
Deal found 2/22$1,146
This Emirates deal was found by Cheapflights users on 2/21. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2911:05 pm
BOS
-
SAI
2 stops35h 25m
Emirates
Tue 4/711:50 pm
SAI
-
BOS
2 stops49h 20m
Emirates
Deal found 2/21$1,240
This FlightHub deal was found by Cheapflights users on 2/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2910:00 pm
BOS
-
SAI
2 stops24h 00m
Multiple Airlines
Mon 4/67:30 pm
SAI
-
BOS
2 stops54h 45m
Multiple Airlines
Deal found 2/24$1,262
This Emirates deal was found by Cheapflights users on 2/21. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2711:05 pm
BOS
-
SAI
2 stops26h 10m
Emirates
Tue 4/711:50 pm
SAI
-
BOS
2 stops49h 20m
Emirates
Deal found 2/21$1,289
This FlightHub deal was found by Cheapflights users on 2/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/289:40 pm
BOS
-
SAI
2 stops24h 20m
Multiple Airlines
Mon 4/67:30 pm
SAI
-
BOS
2 stops54h 45m
Multiple Airlines
Deal found 2/24$1,302
This oojo deal was found by Cheapflights users on 2/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/812:20 pm
BOS
-
SAI
3 stops34h 20m
Singapore Airlines
Sat 10/2410:30 am
SAI
-
BOS
2 stops48h 35m
Singapore Airlines
Deal found 2/22$1,348
This Qatar Airways deal was found by Cheapflights users on 2/23. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/289:40 pm
BOS
-
SAI
2 stops34h 05m
Qatar Airways
Mon 4/67:30 pm
SAI
-
BOS
2 stops54h 45m
Qatar Airways
Deal found 2/23$1,373

Find flight deals from Boston to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Siem Reap (SAI). 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 February 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,240
(Emirates)
Provider with most accurate pricing for Boston Logan Intl-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Siem Reap–Angkor Intl flights.
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From Boston Logan Intl to Siem Reap–Angkor Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Siem Reap 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 February 25, 2026.
Use the filters below to find and compare flights from Boston to Siem Reap that are best for you.

Fly from

Boston

Fly to

Siem Reap

Route

Depart

Return

Price

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Sun 3/29

11:05 pm-9:30 pm

2 stops35h 25m

Siem Reap–Angkor Intl

Tue 4/7

11:50 pm-2:10 pm

2 stops49h 20m

$1,240

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Fri 3/27

11:05 pm-12:15 pm

2 stops26h 10m

Siem Reap–Angkor Intl

Tue 4/7

11:50 pm-2:10 pm

2 stops49h 20m

$1,289

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Sat 3/28

9:40 pm-6:45 pm

2 stops34h 05m

Siem Reap–Angkor Intl

Mon 4/6

7:30 pm-3:15 pm

2 stops54h 45m

$1,373

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Sat 3/28

11:05 pm-12:15 pm

2 stops50h 10m

Siem Reap–Angkor Intl

Tue 4/7

11:50 pm-2:10 pm

2 stops49h 20m

$1,378

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Fri 3/27

9:40 pm-6:45 pm

2 stops58h 05m

Siem Reap–Angkor Intl

Wed 4/8

7:30 pm-3:15 pm

2 stops30h 45m

$1,675

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Compare providers for flights from Boston to Siem Reap

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 Siem Reap in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust 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-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Siem Reap flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Siem Reap 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-Siem Reap 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 Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap 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.

Related info for your journey

Find useful and relevant information for your journey from Boston to Siem Reap. 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 Siem Reap?

    Emirates and Qatar Airways can get you from Boston to Siem Reap in just under 34h 05m. Your travel time can differ by up to 1h 20m. The distance from Boston to Siem Reap is about 8568 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Boston to Siem Reap that include hotel bookings?

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

  • How can I find direct flights from Boston to Siem Reap?

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

  • Can I find deals for business class flights from Boston to Siem Reap?

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

See more FAQs

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