$259 Cheap Flights from Castries (SLU) to Boston (BOS)

You can find cheap one-way flights from $259 and cheap return flights $416 Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) with Expedia. One-way flights typically cost between $228 and $2009. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) ticket fares go up or down.

*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.

The cheapest month to fly from SLU to BOS is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.

Enter SLU to BOS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

Caribbean Airlines and Windward Island Airways International are just some of the carriers that fly from Castries (SLU) to Boston, MA (BOS). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

*Prices based on flights available on Expedia in the last year.

To find a cheap flight from Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from Castries (SLU) to Boston (BOS) will differ from traveler to traveler. If you like to fly early, JetBlue Airways offers early morning flights. If price is the most important factor, JetBlue Airways typically offers the lowest fares. Caribbean Airlines offers the most daily flights from SLU to BOS, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

The earliest flight from Castries (SLU) to Boston (BOS) typically departs at around 5:00 AM, operated by Caribbean Airlines and Air Canada. This seasonal service is active in May, allowing you to start your day early and enjoy your time in Boston. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

The most popular departure times for flights from Castries (SLU) to Boston (BOS) are from 3pm to 6pm. About 75% of passengers prefer this time window. Many major carriers, including American Airlines and Delta Airlines, offer flights during this window. This timing works well because it allows you to enjoy a full day in Castries before your flight.

A flight from SLU to BOS with a layover takes around 8 hours 30 minutes, with the route covering approximately 2,048 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.

Business class seats are offered on the SLU to BOS route with JetBlue Airways and Air Canada.

It's easy to earn miles on a Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

From George F. L. Charles (SLU), you can fly into Logan Intl. (BOS) to reach Boston. Some flights may connect through major hubs like Miami Intl. (MIA), Piarco Intl. (POS), Charlotte-Douglas Intl. (CLT) before reaching Boston. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) Boston Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Castries (SLU-George F. L. Charles) to Boston, MA (BOS-Logan Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.