Cheap flights from Boston Logan International to Castries

Compare Boston Logan International to Castries flight deals

Find the cheapest month or even day of the year to fly to Castries

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Flight deals from Boston Logan International to Castries

Looking for a cheap last-minute deal or the best return flight from Boston Logan International Airport to Castries? If you want to travel next month, return fares start from $585. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Boston Logan International to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boston Logan International to Castries flights are currently cheapest in September.

Direct flights from Boston Logan International to Castries

Alternative Boston Logan International to Castries routes

Looking for the cheapest, fastest or easiest route from Boston Logan International to Castries? You could fly into the following airports instead.

Boston to Castries: Flight information

The things to know before you go.
Cheapest flight found$167
Cheapest month to flySeptember
Average flight time4 hrs, 51 mins
Most popular airlinejetBlue
Average flights per week2

Finding cheap flights from Boston Logan International to Castries: Frequently asked questions

There are 2 airports in Castries: St Lucia Vigie and St Lucia Hewanorra.
The best price we found for a return flight from Boston Logan International to Castries is $448. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 51 minutes is the average flight time from Boston Logan International to Castries.
jetBlue flies direct from Boston Logan International to Castries.
As of June 2026, there are 2 flights per week flying from Boston Logan International to Castries.
The cheapest month to fly from Boston Logan International to Castries is usually August.
If you're flying from Boston Logan International Airport, the cheapest airport near Castries is St Lucia Hewanorra – which is 30.5 km away from the centre of Castries. We've found flights into this airport from $448.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boston Logan International Airport to Castries on Tuesday, 25 August 2026.
Yes – the average flight time is 4 hours and 51 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Castries but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Castries is around 40 days in advance, so don’t leave your flight to the last minute.
In June, the average temperature is usually around 28°C. September is typically the warmest month in Castries, when it usually averages around 28°C. You can expect the least rain in February. The coldest month is February, with temperatures averaging 25°C. The rainiest month is October.
Currently, Delta offers the cheapest flight tickets to Castries.

Travelling from Boston Logan International Airport (BOS) to Castries: what you need to know

  • Expect to be travelling for 5 hours 10 minutes. On average, that's the duration of a direct flight from Boston Logan International Airport to Castries.

  • Castries is one hour ahead of Boston, where Boston Logan International Airport is located. Castries follows the UTC-4 timezone.

  • Give yourself enough time to catch your BOS to Castries flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as July, you'll want to get to the airport earlier than usual. Plan to arrive two hours before domestic departures and four hours ahead for international flights when you travel during a peak period in general.

  • Begin your trip at BOS and travel straight to St Lucia Hewnorra International Airport (UVF). That's where you can expect to touch down when searching for Boston Logan International Airport to Castries tickets.

  • JetBlue Airways is a well-known carrier that operates direct flights from Boston Logan International Airport to Castries.

  • Think about adding a stopover to potentially land a cheaper plane ticket from BOS to Castries. All you need to do is uncheck 'Direct flights only' during your search. Take a detour (and maybe pocket some savings) by stopping at one of these connection hubs:

    • New York John F. Kennedy International Airport (JFK)

    • Newark Liberty International Airport (EWR)

    • Toronto Pearson International Airport (YYZ)

  • BOS is around 3 kilometres from central Boston. If you're driving, ride-sharing or catching a taxi from the centre, it'll take 20 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the trip time to be around 25 minutes.

  • Planning to catch an early flight from Boston Logan International Airport to Castries? Avoid the hassle of rushing to the airport (and catch some extra z's) by choosing one of these stays near BOS:

  • Of all flights leaving Boston Logan International Airport, 75% land on time at their destination.

  • You'll find BOS at One Harborside Drive.

How to find the cheapest flights from Boston Logan International Airport (BOS) to Castries

  • The lowest price we've seen for a one-way Boston Logan International Airport to Castries flight is $167. The cheapest price for a return flight is $448. Remember fares may change due to availability at the time of booking.

  • Book nine months before travelling. Pricing trends show that this is the ideal window for finding cheap flights from BOS to Castries.

  • Plan your trip for February. That's the best month for landing a bargain on Boston Logan International Airport to Castries tickets. If you're flexible with your dates, use the 'Whole month' tool to access the cheapest price across each month.

  • Cut down on the time spent looking for cheap flights from BOS to Castries by setting up a Price Alert. You'll get an email or notification on the app when a lower fare pops up.

  • Tailor your trip with filters. Select your arrival and departure times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Best' or 'Fastest' flights from Boston Logan International Airport to Castries.

Airports in Castries

St Lucia Hewnorra International Airport (UVF)

  • St Lucia Hewnorra International Airport (UVF) is around 72 kilometres from central Castries. If you're opting for a ride-share or a taxi, the drive takes roughly 1 hour 30 minutes.

  • It takes around 2 hours to get there by public transport.

  • If you have a late flight from Boston Logan International Airport to Castries, nothing beats the convenience of staying close to the terminal. Grab your bags from the carousel and then be showered and sleeping not long after at one of these accommodation options near UVF:

  • Secure the lowest price by booking your ride from St Lucia Hewnorra International Airport around one week ahead of your flight from BOS to Castries.

Castries George F. L. Charles Airport (SLU)

  • After your flight from Boston Logan International Airport to Castries has hit the tarmac, you can reach the city centre in about 10 minutes by car. Central Castries is roughly 3 kilometres from Castries George F. L. Charles Airport (SLU).

  • If you choose to travel on public transport, the journey will take you 15 minutes or so.

  • After stepping off your BOS to Castries flight, tuck yourself in at a hotel close to SLU. These are some comfortable accommodation options that'll help you slip into relaxation mode:

  • Call dibs on the best options. Reserving your ride from SLU one week in advance often means better prices and a greater selection of vehicles.

Best time to go to Castries

  • It's time to figure out your dates for your flight from Boston Logan International Airport to Castries. February is the busiest month to visit Castries. If you like a more relaxed vibe, go in September.

  • Before locking in your Boston Logan International Airport to Castries plane ticket, think about the weather you're most comfortable in. September is the warmest month in Castries, with temperatures ranging from 26ºC (79ºF) to 30ºC (86ºF).

  • February sees average temperatures of between 24ºC (75ºF) and 28ºC (82ºF). Search for a cheap ticket from BOS to Castries around that time if you want to travel in cooler conditions.

More about Castries

  • When it comes to searching for somewhere to rest your head, you'll find the best places to stay in Castries right here. Check out these hotels as soon as you've booked your flight from Boston Logan International Airport to Castries:

  • There are so many things to discover in this city it can be difficult to know where to start. Malabar Beach, Vigie Beach and Morne Fortune are major attractions which should feature on any well-planned Castries itinerary.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.