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Siem Reap

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

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 11 — mar 181
ons 3/11
ons 3/18
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 februari 9, 2026.

This Trip.com deal was found by Cheapflights users on 2/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 3/104:40 pm
BOS
-
SAI
2 stops41h 30m
Multiple Airlines
tis 3/1711:50 pm
SAI
-
BOS
2 stops50h 20m
Multiple Airlines
Deal found 2/8$1,072
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.
sön 11/11:50 pm
BOS
-
SAI
2 stops56h 00m
United Airlines
tis 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 2/8. 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.
ons 12/309:05 pm
BOS
-
SAI
2 stops24h 05m
Multiple Airlines
mån 2/17:25 pm
SAI
-
BOS
2 stops30h 55m
Multiple Airlines
Deal found 2/8$1,291
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mån 5/1110:00 pm
BOS
-
SAI
2 stops33h 45m
Multiple Airlines
mån 5/182:55 pm
SAI
-
BOS
3 stops35h 10m
Multiple Airlines
Deal found 2/5$1,330
This FlightHub deal was found by Cheapflights users on 2/8. 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.
ons 12/309:05 pm
BOS
-
SAI
2 stops28h 10m
Multiple Airlines
lör 1/301:20 pm
SAI
-
BOS
2 stops37h 00m
Multiple Airlines
Deal found 2/8$1,331
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 12/2710:10 pm
BOS
-
SAI
2 stops35h 00m
Emirates
tis 2/211:50 pm
SAI
-
BOS
2 stops26h 05m
Emirates
Deal found 2/8$1,337
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 12/2710:10 pm
BOS
-
SAI
2 stops35h 00m
Emirates
mån 2/11:20 pm
SAI
-
BOS
2 stops36h 35m
Emirates
Deal found 2/8$1,338
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.
ons 2/188:40 pm
BOS
-
SAI
2 stops54h 20m
Malaysia Airlines
lör 2/2811:00 am
SAI
-
BOS
2 stops62h 55m
Malaysia Airlines
Deal found 2/5$1,339
This FlightHub deal was found by Cheapflights users on 2/8. 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.
ons 12/309:05 pm
BOS
-
SAI
2 stops24h 05m
Multiple Airlines
sön 1/311:20 pm
SAI
-
BOS
2 stops37h 00m
Multiple Airlines
Deal found 2/8$1,342

Find flight deals from Boston to Siem Reap

Keep the following information in mind while searching for Boston to Siem Reap flight deals. Data was last updated februari 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,072
(Trip.com)

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
Search Deals
One-way flight from Boston Logan Intl to Siem Reap
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 februari 9, 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

mån 5/11

10:00 pm-6:45 pm

2 stops33h 45m

Siem Reap–Angkor Intl

mån 5/18

7:25 pm-3:05 pm

2 stops30h 40m

$1,239

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

ons 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

lör 2/28

11:00 am-1:55 pm

2 stops62h 55m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

ons 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

tis 2/24

11:00 am-2:20 pm

2 stops63h 20m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

ons 2/18

8:40 pm-3:00 pm

2 stops54h 20m

Siem Reap–Angkor Intl

tors 2/26

11:00 am-2:20 pm

2 stops63h 20m

$1,339

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

tors 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

tors 2/26

11:00 am-2:20 pm

2 stops63h 20m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

tors 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

tis 2/24

11:00 am-2:20 pm

2 stops63h 20m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

tors 2/19

8:40 pm-3:00 pm

2 stops30h 20m

Siem Reap–Angkor Intl

lör 2/28

11:00 am-1:55 pm

2 stops62h 55m

$1,436

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

ons 2/18

2:16 pm-3:55 pm

3 stops37h 39m

Siem Reap–Angkor Intl

ons 2/25

10:45 am-11:58 pm

2 stops49h 13m

$1,469

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

fre 2/27

3:40 pm-11:00 am

3 stops31h 20m

Siem Reap–Angkor Intl

sön 3/1

4:50 pm-2:10 pm

3 stops33h 20m

$1,469

BostonSiem Reap

BOS - SAI

BOSSAI

Boston Logan Intl

ons 2/18

8:40 pm-9:15 am

2 stops48h 35m

Siem Reap–Angkor Intl

ons 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 19 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Boston to Siem Reap
No data available for this route at this time. Please check back soon.

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.

  • What airport do you fly from for flights from Boston to Siem Reap?

    If you book a flight to Siem Reap from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston.

  • How long is the flight from Boston to Region of Siem Reap?

    There are many flights that can get you from Boston to Region of Siem Reap in 54h 20m. Fly via Malaysia Airlines to get the fastest option. The distance from Boston to Region of 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.

See more FAQs

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Alternative routes for Boston to Siem Reap

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