$246 Flights from Castries (SLUA) to Boston (BOSA)

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Flight deals from Castries to Boston

Looking for a cheap last-minute deal or the best round-trip flight from Castries to Boston? If you want to travel next month, round-trip fares start from $532. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Castries to Boston

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

Direct flights from Castries to Boston

Castries to Boston: Flight information

The things to know before you go.
Cheapest flight found$246
Cheapest month to flyApril
Average flight time5 hrs, 11 mins
Most popular airlineQatar Airways
Average flights per week2

Finding cheap flights from Castries to Boston: Frequently asked questions

There are 7 airports in Boston: Boston Logan International, Worcester, Manchester, Provincetown, Fall River, Providence, and Portsmouth.
The best price we found for a round-trip flight from Castries to Boston is $467. 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.
5 hours and 11 minutes is the average flight time from Castries to Boston.
Qatar Airways and jetBlue fly direct from Castries to Boston.
There are 2 flights per week flying from Castries to Boston, as of April 2026.
The cheapest month to fly from Castries to Boston is usually April.
If you're flying from Castries, the cheapest airport near Boston is Boston Logan International – which is 2.8 miles away from the center of Boston. We've found flights to this airport from $467.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Castries to Boston on Saturday, April 18, 2026.
Yes – the average flight time is 5 hours and 11 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 Boston 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 Boston is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 45°F. July is typically the warmest month in Boston, when it usually averages around 79°F. You can expect the least rain in January. The coldest month is January, with temperatures averaging 21°F. The rainiest month is March.
The cheapest airline that flies to Boston is jetBlue.

How to find cheap flights to Boston from Castries

Looking for cheap tickets from Castries to Boston? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit "search." From Delta Air Lines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Castries to Boston. And with us, there are no hidden fees – what you see is what you pay.
  • Compare flight deals to Boston from Castries from over 1,000 providers. Then choose the cheapest plane tickets or fastest journeys.
  • Flex your dates to find the best Castries–Boston ticket prices. If you're flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to Boston from Castries.
  • Set up a Price Alert. You can easily track the fare of your cheap Castries–Boston flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between Castries and Boston? Make sure to tick "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results.
  • Find the cheapest Business Class flights from Castries and Boston. We scour the Internet for the best Business, Premium Economy and First Class flight fares to Boston, too. Check the difference in price as you search – you might just stumble on a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for Castries to Boston flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save the next time you travel.
  • Combine your flight to Boston from Castries with hotels and car rental

    Once you've secured your cheap flight ticket from Castries to Boston, discover the best prices and exclusive rates for hotels in Boston or nearby. You can also compare hundreds of car rental companies at once so you get the best car rental price for your trip.


Prices shown on this page are estimated lowest prices only. Found in the last 45 days.