HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Castries

$572+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SLU
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Castries 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 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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$921
(Mytrip)

One-way from

$572
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$607

Good round-trip deal

$674 or less

Good one-way deal

$213 or less
Provider with most accurate pricing for Boston Logan Intl-Castries George F. L. Charle flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Castries George F. L. Charle flights.
Search Deals
From Boston Logan Intl to Castries George F. L. Charle
Search Deals
One-way flight from Boston Logan Intl to Castries George F. L. Charle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Castries George F. L. Charle.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to Castries George F. L. Charle.
Search Deals

Find 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 September 29, 2025.

This Mytrip deal was found by Cheapflights users on 9/28. 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.
Sun 10/56:00 amBOS - SLU
3 stops33h 50mMultiple Airlines
Sun 10/125:00 amSLU - BOS
3 stops18h 11mMultiple Airlines
Deal found 9/28$913
This Mytrip deal was found by Cheapflights users on 9/28. 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.
Thu 10/26:10 amBOS - SLU
2 stops32h 30mMultiple Airlines
Sat 10/412:35 pmSLU - BOS
3 stops20h 55mMultiple Airlines
Deal found 9/28$918
This Mytrip deal was found by Cheapflights users on 9/28. 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 10/256:30 pmBOS - SLU
3 stops24h 30mMultiple Airlines
Tue 10/287:30 amSLU - BOS
3 stops31h 22mMultiple Airlines
Deal found 9/28$921
This Mytrip deal was found by Cheapflights users on 9/26. 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 11/175:45 amBOS - SLU
3 stops32h 30mMultiple Airlines
Sat 11/226:20 pmSLU - BOS
2 stops31h 20mMultiple Airlines
Deal found 9/26$934
This Mytrip deal was found by Cheapflights users on 9/26. 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.
Tue 11/1110:15 amBOS - SLU
3 stops22h 15mMultiple Airlines
Tue 11/257:30 amSLU - BOS
3 stops27h 02mMultiple Airlines
Deal found 9/26$955
This Mytrip deal was found by Cheapflights users on 9/28. 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.
Wed 12/105:30 amBOS - SLU
2 stops12h 30mMultiple Airlines
Sat 12/2012:35 pmSLU - BOS
3 stops24h 37mMultiple Airlines
Deal found 9/28$989
This Mytrip deal was found by Cheapflights users on 9/28. 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.
Thu 11/61:00 pmBOS - SLU
3 stops23h 10mMultiple Airlines
Tue 11/117:30 amSLU - BOS
3 stops27h 02mMultiple Airlines
Deal found 9/28$1,024
This Mytrip deal was found by Cheapflights users on 9/28. 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.
Wed 12/105:30 amBOS - SLU
2 stops12h 30mMultiple Airlines
Wed 12/179:10 amSLU - BOS
2 stops25h 22mMultiple Airlines
Deal found 9/28$1,047
This Mytrip deal was found by Cheapflights users on 9/27. 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.
Fri 10/246:00 amBOS - SLU
3 stops31h 10mMultiple Airlines
Mon 10/279:10 amSLU - BOS
2 stops24h 47mMultiple Airlines
Deal found 9/27$1,050

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 September 29, 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

Sat 10/25

6:55 pm-7:00 pm

2 stops24h 05m

Castries George F. L. Charle

Tue 10/28

7:30 am-9:57 am

2 stops26h 27m

$921

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Mon 11/17

5:45 am-3:15 pm

3 stops32h 30m

Castries George F. L. Charle

Sat 11/22

6:20 pm-12:40 am

2 stops31h 20m

$934

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Tue 11/11

10:15 am-9:30 am

3 stops22h 15m

Castries George F. L. Charle

Tue 11/25

7:30 am-9:32 am

3 stops27h 02m

$955

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Wed 12/10

5:30 am-7:00 pm

2 stops12h 30m

Castries George F. L. Charle

Sat 12/20

12:35 pm-12:12 pm

3 stops24h 37m

$989

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Thu 11/6

1:00 pm-1:10 pm

3 stops23h 10m

Castries George F. L. Charle

Tue 11/11

7:30 am-9:32 am

3 stops27h 02m

$1,024

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Wed 12/10

5:30 am-7:00 pm

2 stops12h 30m

Castries George F. L. Charle

Wed 12/17

9:10 am-9:32 am

2 stops25h 22m

$1,047

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Fri 10/24

6:00 am-1:10 pm

3 stops31h 10m

Castries George F. L. Charle

Mon 10/27

9:10 am-9:57 am

2 stops24h 47m

$1,050

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Tue 2/10

12:20 pm-7:00 pm

3 stops29h 40m

$572

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Thu 12/25

6:15 am-1:10 pm

3 stops29h 55m

$624

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Mon 2/16

11:13 am-8:45 am

3 stops20h 32m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 15 results
1
2

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Castries flight deals on Cheapflights vs. FlightHub >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 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-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, August is the cheapest month in which you can book a flight from Boston to Castries (average of $525). Flying from Boston to Castries in July is currently the most expensive (average of $767). 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.

What is the cheapest time of day to fly from BOS to SLU?

Find hourly flight availability from Boston to Castries. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 29, 2025.

It’s optimal to fly from Boston to Castries at noon. By choosing this option you can save up to 4% on the cost of your flight, compared to a flight in the morning.

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 September 29, 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
10,000 reviews

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Food

6.4

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Food

6.4

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
JetBlue
7.2
Good
2,912 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Food

6.4

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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?

    JetBlue, at $351, was found to be the cheapest airline from Boston to Castries. An alternate airline flying to your destination would be American Airlines. You may be able to fly from Boston to Castries for 49% 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, August is the cheapest month in which you can book a flight from Boston to Castries (average of $525). Flying from Boston to Castries in July is currently the most expensive (average of $767). 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
Rodney Bay
Gros Islet
Marigot Bay

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$351Average$661FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$449Average$602FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.