$728+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAI
Dec 8 — Dec 151
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Siem Reap with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Siem Reap
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to Siem ReapExplore 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 November 8, 2026.
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 November 8, 2026.
This FlightHub deal was found by Cheapflights users on 11/4. 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 11/161:00 pm -
3 stops32h 55m
Mon 5/2410:30 am -
3 stops44h 40m
Deal found 11/4![Singapore Airlines logo]()
$1,502
This FlightHub deal was found by Cheapflights users on 11/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:09 pm -
3 stops29h 46m
Sun 5/2310:30 am -
2 stops33h 10m
Deal found 11/7![Singapore Airlines logo]()
$1,508
This Ovago deal was found by Cheapflights users on 11/4. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:59 pm -
2 stops62h 31m
Mon 5/2412:55 pm -
2 stops29h 23m
Deal found 11/4![Multiple Airlines logo]()
$1,509
This Turkish Airlines deal was found by Cheapflights users on 11/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:00 pm -
2 stops24h 45m
Sun 5/237:25 pm -
2 stops35h 30m
Deal found 11/7![Multiple Airlines logo]()
$1,588
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/263:40 pm -
3 stops28h 20m
Sat 1/1611:50 pm -
3 stops34h 47m
Deal found 11/6![Multiple Airlines logo]()
$2,474
Best flights from Boston to Siem ReapDiscover carefully curated flight deals from Boston to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 8, 2026.
Discover carefully curated flight deals from Boston to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 8, 2026.
This Expedia deal was found by Cheapflights users on 11/6. 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.
Thu 2/183:40 pm -
2 stops32h 05m
Thu 2/254:50 pm -
2 stops32h 50m
Deal found 11/6![Multiple Airlines logo]()
$1,288
This Emirates deal was found by Cheapflights users on 11/5. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/1510:10 pm -
2 stops26h 30m
Tue 2/2311:50 pm -
2 stops50h 05m
Deal found 11/5![Emirates logo]()
$1,322
This Qatar Airways deal was found by Cheapflights users on 11/5. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/158:40 pm -
2 stops24h 35m
Wed 2/247:25 pm -
2 stops54h 50m
Deal found 11/5![Qatar Airways logo]()
$1,424
This FlightHub deal was found by Cheapflights users on 11/3. 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 1/2611:30 am -
3 stops34h 25m
Sun 2/144:50 pm -
3 stops42h 58m
Deal found 11/3![Singapore Airlines logo]()
$1,499
This oojo deal was found by Cheapflights users on 11/3. 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.
Tue 1/2610:10 pm -
2 stops35h 00m
Sun 2/141:20 pm -
2 stops36h 35m
Deal found 11/3![Emirates logo]()
$1,367
This Turkish Airlines deal was found by Cheapflights users on 11/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/268:00 pm -
2 stops25h 15m
Sun 2/147:25 pm -
2 stops34h 40m
Deal found 11/7![Multiple Airlines logo]()
$1,369
This Qatar Airways deal was found by Cheapflights users on 11/6. 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.
Thu 2/185:12 pm -
3 stops28h 03m
Thu 2/251:20 pm -
2 stops36h 55m
Deal found 11/6![Qatar Airways logo]()
$1,547
This Emirates deal was found by Cheapflights users on 11/5. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1410:10 pm -
2 stops35h 00m
Wed 2/241:20 pm -
2 stops36h 35m
Deal found 11/5![Emirates logo]()
$1,480
Last-minute flights from Boston to Siem ReapDiscover last-minute flight deals from Boston to Siem Reap. Data last updated November 8, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Siem Reap. Data last updated November 8, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 11/4. 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 11/161:00 pm -
3 stops32h 55m
Mon 5/2410:30 am -
3 stops44h 40m
Deal found 11/4![Singapore Airlines logo]()
$1,502
This FlightHub deal was found by Cheapflights users on 11/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:09 pm -
3 stops29h 46m
Sun 5/2310:30 am -
2 stops33h 10m
Deal found 11/7![Singapore Airlines logo]()
$1,508
This Ovago deal was found by Cheapflights users on 11/4. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:59 pm -
2 stops62h 31m
Mon 5/2412:55 pm -
2 stops29h 23m
Deal found 11/4![Multiple Airlines logo]()
$1,509
This Turkish Airlines deal was found by Cheapflights users on 11/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:00 pm -
2 stops24h 45m
Sun 5/237:25 pm -
2 stops35h 30m
Deal found 11/7![Multiple Airlines logo]()
$1,588
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/263:40 pm -
3 stops28h 20m
Sat 1/1611:50 pm -
3 stops34h 47m
Deal found 11/6![Multiple Airlines logo]()
$2,474
One-way flights from Boston to Siem ReapSearch for one-way flight options from Boston to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 8, 2026.
Search for one-way flight options from Boston to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/610:55 pm -
2 stops46h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$728
This FlightHub deal was found by Cheapflights users on 11/3. 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 11/171:00 pm -
3 stops39h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Singapore Airlines logo]()
$914
This CheapOair deal was found by Cheapflights users on 11/4. 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.
Tue 11/173:40 pm -
2 stops53h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Etihad Airways logo]()
$954
This CheapOair deal was found by Cheapflights users on 11/3. 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.
Tue 11/1710:10 pm -
2 stops35h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Emirates logo]()
$957
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/263:40 pm -
2 stops56h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$1,436
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/295:15 pm -
3 stops38h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$1,464
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/275:15 pm -
3 stops39h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$1,683
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/288:00 pm -
3 stops58h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$1,825
This BusinessClass deal was found by Cheapflights users on 11/6. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2710:10 pm -
2 stops35h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Emirates logo]()
$2,550
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 November 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,288 (Expedia) |
One-way from | $666 (Kiwi.com) |
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 7,457,451 searches. Data last updated November 8, 2026.
Use the filters below to find and compare flights from Boston to Siem Reap that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Sun 12/6
10:55 pm-9:15 am
2 stops46h 20m
Siem Reap–Angkor Intl
Wed 12/31
12:00 am-12:00 pm
Nonstop0h 00m
$728
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 11/17
1:00 pm-9:55 am
3 stops32h 55m
Siem Reap–Angkor Intl
Wed 12/31
12:00 am-12:00 pm
Nonstop0h 00m
$914
Quickest round-trip
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 11/17
4:09 pm-9:55 am
3 stops29h 46m
Siem Reap–Angkor Intl
Wed 12/31
12:00 am-12:00 pm
Nonstop0h 00m
$914
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 11/17
3:40 pm-12:40 pm
2 stops57h 00m
Siem Reap–Angkor Intl
Wed 12/31
12:00 am-12:00 pm
Nonstop0h 00m
$954
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 11/17
10:10 pm-9:10 pm
2 stops35h 00m
Siem Reap–Angkor Intl
Wed 12/31
12:00 am-12:00 pm
Nonstop0h 00m
$957
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Thu 2/18
3:40 pm-11:45 am
2 stops32h 05m
Siem Reap–Angkor Intl
Thu 2/25
4:50 pm-1:40 pm
2 stops32h 50m
$1,288
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Mon 2/15
10:10 pm-12:40 pm
2 stops26h 30m
Siem Reap–Angkor Intl
Tue 2/23
11:50 pm-1:55 pm
2 stops50h 05m
$1,322
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 1/26
10:10 pm-9:10 pm
2 stops35h 00m
Siem Reap–Angkor Intl
Sun 2/14
1:20 pm-1:55 pm
2 stops36h 35m
$1,367
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Tue 1/26
8:00 pm-9:15 am
2 stops25h 15m
Siem Reap–Angkor Intl
Sun 2/14
7:25 pm-6:05 pm
2 stops34h 40m
$1,369
BostonSiem Reap
BOS Boston Logan Intl - SAI Siem Reap–Angkor Intl
BOSSAI
Boston Logan Intl
Mon 2/15
8:40 pm-9:15 am
2 stops24h 35m
Siem Reap–Angkor Intl
Wed 2/24
7:25 pm-2:15 pm
2 stops54h 50m
$1,424
Showing 1-10 of 14 resultsSorted by cheapest first
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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
BOS-SAI
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.
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