BOS

Find Cheap Flights from Portsmouth to Boston – Compare and Save

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1 adult, Economy, 0 bags

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Price, demand, and travel trends for Portsmouth to Boston flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

What is the cheapest stopover airport when flying from Portsmouth to Boston?

Flights via Dublin (DUB) offer the most affordable fares, with an average return price of £660. Based on KAYAK data over the past 3 months.

When flying from Portsmouth to Boston, which airport offers the shortest stopover?

Dublin (DUB) had the shortest average connection time for Portsmouth to Boston stopovers at 7h 38m over the past 3 months.

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When to book flights from Portsmouth to Boston

Are your dates flexible? Find out the best times to travel from Portsmouth to Boston based on our flight data from the last year. Discover the cheapest month and even day to fly.
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Your Portsmouth to Boston flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Portsmouth to Boston?

    Only Economy class is available on flights from Portsmouth to Boston.

  • Do I need a passport to fly from Portsmouth to Boston?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Which airports can I use when flying from Portsmouth to Boston?

    Flights from Portsmouth to Boston usually depart from Southampton Eastleigh (SOU) and arrive at Boston Logan Intl (BOS).

  • Which airports do connecting flights from Portsmouth to Boston pass through?

    Most connecting flights from Portsmouth to Boston pass through Dublin (DUB), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Portsmouth to Boston?

    Yes. Flexible dates can save you up to 46% on flights from Portsmouth to Boston. Thursday is the cheapest departure day at £597 return on average, while Monday is the most expensive at £1,103, a difference of £507.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Portsmouth and Boston?

    Boston is 4 hours behind Portsmouth (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Boston?

    Some of the most popular sights in Boston are Boston Common, Copley Square, and John B. Hynes Veterans Memorial Convention Center. These are among the most viewed places in Boston on KAYAK.

Your guide to booking Portsmouth to Boston flights

Get tips on when to book, when to fly, and what to know before your trip.

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