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Castries

$411+ Cheap flights from Boston (BOS) to Castries (SLU)

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SLU
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Boston to Castries

Cheapest flights from Boston to Castries
Explore the most affordable flight options available from Boston to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Mytrip deal was found by Cheapflights users on 12/26. 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.
Mon 12/296:55 pmBOS - SLU
2 stops23h 05mMultiple Airlines
Sun 1/45:00 amSLU - BOS
3 stops28h 46mMultiple Airlines
Deal found 12/26$1,249

Find flight deals from Boston to Castries

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Castries (SLU). 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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$920
(Mytrip)

Popular in

April

Cheapest in

March

Average price

$644

Good round-trip deal

$855 or less
Provider with most accurate pricing for Boston Logan Intl-Castries George F. L. Charle flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Castries George F. L. Charle flights.
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From Boston Logan Intl to Castries George F. L. Charle
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Castries George F. L. Charle.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Castries 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 December 28, 2025.
Use the filters below to find and compare flights from Boston to Castries that are best for you.

Fly from

Boston

Fly to

Castries

Route

Depart

Return

Price

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Tue 2/10

6:55 pm-7:00 pm

2 stops23h 05m

Castries George F. L. Charle

Tue 2/17

4:20 pm-11:46 pm

3 stops32h 26m

$1,341

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Thu 2/5

6:15 am-3:15 pm

2 stops32h 00m

Castries George F. L. Charle

Sun 2/8

7:10 pm-10:02 am

2 stops39h 52m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Sun 1/25

6:15 am-3:35 pm

2 stops32h 20m

Castries George F. L. Charle

Sun 2/1

7:10 pm-10:02 am

2 stops39h 52m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Thu 1/22

6:15 am-11:30 am

2 stops28h 15m

Castries George F. L. Charle

Sun 1/25

5:00 am-10:37 pm

2 stops42h 37m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Fri 2/27

6:15 am-10:10 pm

2 stops38h 55m

Castries George F. L. Charle

Wed 3/4

10:15 am-10:37 pm

2 stops37h 22m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Wed 2/25

6:15 am-1:10 pm

2 stops29h 55m

Castries George F. L. Charle

Sun 3/1

7:10 pm-3:57 pm

3 stops45h 47m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Fri 1/23

6:15 am-1:10 pm

2 stops29h 55m

Castries George F. L. Charle

Fri 1/30

7:10 pm-6:02 pm

2 stops23h 52m

$3,380

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Sat 1/24

6:15 am-3:15 pm

2 stops32h 00m

Castries George F. L. Charle

Sat 1/31

6:20 pm-12:12 pm

2 stops42h 52m

$3,388

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Tue 4/21

5:55 pm-1:10 pm

2 stops43h 15m

$411

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Compare providers for flights from Boston to Castries

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 Castries in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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-Castries flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Castries flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Castries flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Castries flights, Cheapflights users trust eDreams the most. eDreams 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-Castries 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 Castries

Have a flexible travel schedule? Discover the best time to fly to Castries 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 Castries

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

Currently, May is the cheapest month in which you can book a flight from Boston to Castries (average of $214). Flying from Boston to Castries in September is currently the most expensive (average of $543). 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.

Reviews of airlines servicing Castries

Get insights into the airlines that provide service to Castries. 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 Castries. Reviews last updated December 28, 2025.
Read reviews from past customers who have flown American Airlines and JetBlue from Boston to Castries. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,070 reviews

Food

6.5

Overall

7.2

Boarding

7.5

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,070 reviews
American Airlines
7.2
Good
11,070 reviews

Food

6.5

Overall

7.2

Boarding

7.5

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
JetBlue
7.2
Good
2,901 reviews
American Airlines
7.2
Good
11,070 reviews

Food

6.5

Overall

7.2

Boarding

7.5

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

Related info for your journey

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

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

    American Airlines, at $425, was found to be the cheapest airline from Boston to Castries. An alternate airline flying to your destination would be JetBlue. You may be able to fly from Boston to Castries for 36% less than the average price by searching for these airlines.

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

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

  • How can I find direct flights from Boston to Castries?

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

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

    Yes. Cheapflights offers flight deals from Boston to Castries 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 Castries?

    Currently, May is the cheapest month in which you can book a flight from Boston to Castries (average of $214). Flying from Boston to Castries in September is currently the most expensive (average of $543). 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

Traveling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Gros Islet
Rodney Bay
Marigot Bay

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Alternative routes for Boston to Castries

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Castries flights
Hartford to Castries flights
Albany to Castries flights

Top 2 airlines flying from Boston to Castries

Discover the top 2 airlines that operate flights from Boston to Castries. 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$441Average$660FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$449Average$607FlexibilityNo cancel feeOn-time71%

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