Find cheap one-way flights from Castries to Boston starting at US$226.

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

Round-trip
One way

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

When is the cheapest time to book flights from Castries to Boston?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

2 9
9 16
16 23
23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25

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 Castries (SLU) to Boston (BOS) the cheapest?

Airlines adjust prices for flights from Castries to Boston based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Castries (SLU) to Boston (BOS) cost?

According to Trip.com's data, the lowest price is around $430.
How long does it take to fly from Castries (SLU) to Boston (BOS) and what is the distance?

It takes around 5 hours 7 minutes to fly from Castries (SLU) to Boston (BOS).
What are the most popular airlines that fly from Castries (SLU) to Boston (BOS)?

Airlines with flights from Castries (SLU) to Boston (BOS): Qatar Airways and Jetblue Airways.

How to find a cheap flight from Castries to Boston

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 Castries to Boston. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Castries to Boston Flight Information

Cheapest nonstop flight price	$225
Cheapest round-trip ticket price	$472
Off-season for travel	February
Peak season for travel	May
Flight distance	3,295.52 km
Average flight time	5 hours 7 minutes
Popular airline	Jetblue Airways