Cheap British Airways flights Boston (BOS) to Southampton (SOU)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap British Airways return flights from BOS to SOU. Affordable one-way options are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

British Airways flights to Southampton tend to be cheaper in the low-season months of January and February. Whether you’re in search of a one-way or round-trip ticket, you could score a better deal then.

Check for British Airways flights from BOS to SOU about one month before you want to leave. The most affordable time to reserve an international flight is usually 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. No matter your ticket type or itinerary, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct journey from BOS to SOU with British Airways or any other airlines, check the “Nonstop” box when searching for tickets.

Sort your results by “Early Morning” and “Morning” to see the earliest flights from BOS to SOU. Setting off early means you’re 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

British Airways flights from Logan Intl. Airport (BOS) to Southampton land at Southampton Airport (SOU). This is the main entry point to this city.

British Airways lets passengers bring 1 checked-in bag weighing up to 50 lb with maximum dimensions of 29 inches x 15 inches x 16 inches on standard economy flights from BOS to SOU. Additionally, you can bring 2 cabin bags in the cabin. This carry-on luggage must not exceed 19 inches x 9 inches x 17 inches and be no heavier than 50 lb. Baggage allowances can differ depending on the fare type and cabin class, so check your booking or British Airways’s website to avoid extra fees at the airport.

With top-tier customer service and an excellent in-flight experience, British Airways is the leading choice for many passengers flying from BOS to SOU. Also, if you’re a British Airways Executive Club and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee generally applies if you cancel or change your flight more than 24 hours after confirmation. To find tickets with more flexibility, select our “No cancel fee” or “Changes included” filter when looking for flights. For additional information on canceling or changing your reservation, go to “Trips,” select your flight and click on “Manage Booking.”