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Siem Reap

$540+ Cheap flights from Boston (BOS) to Siem Reap, Cambodia (SAI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAI
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
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 7, 2026.

This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:50 pm
BOS
-
SAI
2 stops56h 00m
United Airlines
Tue 12/14:45 pm
SAI
-
BOS
3 stops43h 09m
United Airlines
Deal found 2/7$1,200
This FlightHub deal was found by Cheapflights users on 2/5. 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.
Mon 5/1110:00 pm
BOS
-
SAI
2 stops33h 45m
Multiple Airlines
Mon 5/187:25 pm
SAI
-
BOS
2 stops30h 40m
Multiple Airlines
Deal found 2/5$1,239
This Malaysia Airlines deal was found by Cheapflights users on 2/5. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:40 pm
BOS
-
SAI
2 stops54h 20m
Malaysia Airlines
Tue 2/2411:00 am
SAI
-
BOS
2 stops63h 20m
Malaysia Airlines
Deal found 2/5$1,339
This Singapore Airlines deal was found by Cheapflights users on 2/7. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/13:40 pm
BOS
-
SAI
3 stops30h 10m
Multiple Airlines
Tue 12/14:45 pm
SAI
-
BOS
3 stops36h 02m
Multiple Airlines
Deal found 2/7$1,351
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1511:00 am
BOS
-
SAI
2 stops58h 50m
United Airlines
Tue 2/244:45 pm
SAI
-
BOS
2 stops36h 17m
United Airlines
Deal found 2/5$1,366
This United Airlines deal was found by Cheapflights users on 2/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/151:50 pm
BOS
-
SAI
2 stops56h 00m
United Airlines
Sat 2/284:45 pm
SAI
-
BOS
2 stops39h 11m
United Airlines
Deal found 2/5$1,416
This Malaysia Airlines deal was found by Cheapflights users on 2/5. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/168:40 pm
BOS
-
SAI
2 stops49h 20m
Malaysia Airlines
Tue 2/2411:00 am
SAI
-
BOS
2 stops63h 20m
Malaysia Airlines
Deal found 2/5$1,426
This Malaysia Airlines deal was found by Cheapflights users on 2/5. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:40 pm
BOS
-
SAI
2 stops30h 20m
Malaysia Airlines
Tue 2/2411:00 am
SAI
-
BOS
2 stops63h 20m
Malaysia Airlines
Deal found 2/5$1,436
This FlightHub deal was found by Cheapflights users on 2/5. 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.
Wed 2/182:16 pm
BOS
-
SAI
3 stops37h 39m
Singapore Airlines
Wed 2/2510:45 am
SAI
-
BOS
2 stops49h 13m
Singapore Airlines
Deal found 2/5$1,469
This FlightHub deal was found by Cheapflights users on 2/5. 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.
Tue 2/178:40 pm
BOS
-
SAI
2 stops48h 35m
Qatar Airways
Wed 2/257:25 pm
SAI
-
BOS
2 stops54h 55m
Qatar Airways
Deal found 2/5$1,543

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 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,239
(FlightHub)

One-way from

$540
(Kiwi.com)
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.
Search Deals
From Boston Logan Intl to Siem Reap–Angkor Intl
Search Deals
One-way flight from Boston Logan Intl to Siem Reap–Angkor Intl
Search Deals

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 7, 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

Mon 5/11

10:00 pm-6:45 pm

2 stops33h 45m

Siem Reap–Angkor Intl

Mon 5/18

7:25 pm-3:05 pm

2 stops30h 40m

$1,239

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Wed 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

Sat 2/28

11:00 am-1:55 pm

2 stops62h 55m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Wed 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

Tue 2/24

11:00 am-2:20 pm

2 stops63h 20m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Wed 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

Thu 2/26

11:00 am-2:20 pm

2 stops63h 20m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Thu 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

Thu 2/26

11:00 am-2:20 pm

2 stops63h 20m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Thu 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

Tue 2/24

11:00 am-2:20 pm

2 stops63h 20m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Thu 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

Sat 2/28

11:00 am-1:55 pm

2 stops62h 55m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Wed 2/18

2:16 pm-3:55 pm

3 stops37h 39m

Siem Reap–Angkor Intl

Wed 2/25

10:45 am-11:58 pm

2 stops49h 13m

$1,469

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Fri 2/27

3:40 pm-11:00 am

3 stops31h 20m

Siem Reap–Angkor Intl

Sun 3/1

4:50 pm-2:10 pm

3 stops33h 20m

$1,469

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

Wed 2/18

8:40 pm-9:15 am

2 stops48h 35m

Siem Reap–Angkor Intl

Wed 2/25

7:25 pm-2:20 pm

2 stops54h 55m

$1,543

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 20 results
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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
MytripPrice Accuracy2 starsTrust Score*3 stars
GotogatePrice Accuracy2 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?

    Malaysia Airlines can get you from Boston to Siem Reap in just under 54h 20m. Your travel time can differ by up to . The distance from Boston to Siem Reap is about 8568 mi.

  • 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.

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