What is the cheapest day to fly from Boston to Castries?

Travelers seeking maximum savings on their Boston to Castries flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Boston to Castries?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 45%.

How far in advance should I book a flight from Boston to Castries?

To save up to 49% on this flight, we recommend booking at least 34 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Boston to Castries from $517 1-2 weeks out and tickets from $647 for flights departing within the next 72 hours.

What is the cheapest month to fly from Boston to Castries?

The best pricing can be found in the month of September. Prices to Castries from Boston average $674. You can even find prices in September for less than $674, as users have found deals to Castries from as low as $423. The month of December appears to be one of the more expensive times to travel to Castries from Boston. Flying in the targeted month can save you up to 42%.

Most accurate provider : When it comes to deals on Boston-Castries flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Boston-Castries flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

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.

$736+ Flights from Boston to Castries

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$736 (Mytrip)
Popular in	December
Cheapest in	September
Average price	$695
Good round-trip deal	$642 or less
Good one-way deal	$153 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

Highest demand for flights based on searches. 2% potential increase in price ($19 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 16, 2025.

Sun 6/86:10 amBOS - SLU

2 stops33h 40mMultiple Airlines

Sun 6/1512:10 pmSLU - BOS

2 stops21h 45mMultiple Airlines

Deal found 4/16

$814

Best flights from Boston to Castries
Discover carefully curated flight deals from Boston to Castries that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 16, 2025.

Sun 5/185:45 amBOS - SLU

3 stops34h 05mMultiple Airlines

Fri 5/2312:15 pmSLU - BOS

3 stops35h 32mMultiple Airlines

Deal found 4/16

$736

Last-minute flights from Boston to Castries
Discover last-minute flight deals from Boston to Castries. Data last updated April 16, 2025 and is based on user searches.

Fri 5/162:25 pmBOS - SLU

3 stops23h 50mMultiple Airlines

Mon 5/194:35 pmSLU - BOS

3 stops29h 15mMultiple Airlines

Deal found 4/15

$847

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Sun 6/8

6:10 am-3:50 pm

2 stops33h 40m

Castries George F. L. Charle

Sun 6/15

12:10 pm-9:55 am

2 stops21h 45m

$814

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Compare providers for flights from Boston to Castries

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Castries in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Boston-Castries flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

How far ahead should I book a flight from Boston to Castries?

To ensure you get the cheapest price possible for a flight from Boston to Castries, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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?

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.

Related info for your journey

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

Gros Islet

Marigot Bay

Rodney Bay

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Boston to Castries

Boston to Castries flights

Hartford to Castries flights

Albany to Castries flights

Other flights to Castries

Top 2 airlines flying from Boston to Castries

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$406	Average$653	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$425	Average$606	FlexibilityNo cancel fee	On-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.

$736+ Cheap flights from Boston (BOS) to Castries (SLU)

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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Castries with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Boston to Castries

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Boston to Castries

Cheapest flights from Boston to CastriesExplore 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 April 16, 2025.

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 April 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Castries that are best for you.

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 April.

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.

Cheapflights Insights

Everything you need to know about your flight from Boston to Castries

How far ahead should I book a flight from Boston to Castries?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Castries. Price data was last updated on April 11, 2025.

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

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 April 16, 2025.

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.

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

How can I find direct flights from Boston to Castries?

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

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

Traveling to a place near Boston?

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.

Top 2 airlines flying from Boston to Castries

100% Free

Book with Flexibility

Travel Smart

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 April 16, 2025.