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Flights from Boston to Castries

Cheap flight deals from Boston to Castries

Find the cheapest flights from Boston to Castries within the next 3 months. Book one way flights from AED 643 or round trip flights from AED 1,344.

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Info | Boston to Castries

The distance between Boston and Castries is about 3,295.52 km. The most popular month to Castries is June. The off-season for travel is April.

Cheapest one-way flight price AED 643
Cheapest return ticket price AED 1,344
Off-season for travel April
Peak season for travel June
Flight distance 3,295.52 km

When is the cheapest time to fly from Boston to Castries?

The cheapest time for Boston to Castries flights: Sep 7 to Sep 14 — one way flight prices from AED 642.

Cheapest flights
From price
Search
  • 20 27

  • Aug

    27 3
  • 3 10
  • 10 17
  • 17 24
  • 24 31

  • Sep

    31 7
  • 7 14
  • 14 21
  • 21 28

  • Oct

    28 5
  • 5 12
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Boston (BOS) to Castries (SLU) the cheapest?

    Airlines adjust prices for flights from Boston to Castries based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Boston (BOS) to Castries (SLU) cost?

    According to Trip.com's data, the lowest price is around AED 2,776.

  • How many airports are there in Castries (SLU)?

    There are 2 airport(s) near Castries (SLU): George F. L. Charles Airport and Hewanorra International Airport.

How to find a cheap flight from Boston to Castries

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Boston to Castries. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest Boston to Castries ticket.
Tap "Date" on flight search bar to scan through the calender for Boston to Castries airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Sat, Sep 13 at AED 643 for one-way flights.
2
Compare cheap Boston to Castries flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Boston to Castries. The cheapest airline operating is United Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your Boston to Castries route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Boston to Castries flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Boston to Castries to get exclusive deals for you.

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