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Find Cheap Flights from Portsmouth to Belfast – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Direct flights
Every day
You can fly direct with Aer Lingus and easyJet. Average duration is 1h 35m
Direct flights
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Direct flights
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When to book
13 weeks
in advance
Our data shows that travellers who book at least 13 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 21% price drop
May
Most popular
Good to know
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Good to know
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Booking Insights
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Booking Insights

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

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

What's the cheapest day of the week to fly from Portsmouth to Belfast?

Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from Portsmouth to Belfast. It’s 11% cheaper than the average day, while Sunday is the most expensive, with prices 26% higher.

What is the cheapest month to fly from Portsmouth to Belfast?

•September is the cheapest month to fly from Portsmouth to Belfast at £97 return.
•December (£172) and November (£159) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 76% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Portsmouth to Belfast the cheapest?

Flights from Portsmouth to Belfast are cheapest 13 weeks before departure. Booking in this window typically costs about 37% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Portsmouth to Belfast flights

Low season

December
The most popular month to fly with an average 56% increase in traveller numbers.

When to book flights from Portsmouth to Belfast

Are your dates flexible? Find out the best times to travel from Portsmouth to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Portsmouth to Belfast flight questions, answered

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

  • What are the earliest and latest flights from Portsmouth to Belfast?

    These are the earliest and latest flight times available from Portsmouth to Belfast:

    • Earliest: departs at 08:50 and lands at 10:25
    • Latest: departs at 19:40 and lands at 21:15.

    The flight takes about 1h 35m.

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

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

  • How long is a flight from Portsmouth to Belfast?

    A direct flight from Portsmouth to Belfast takes 1h 35m, covering 330 miles.

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

    No, a passport is not required for this domestic route, but you will need another form of identification, such as a driving licence.

  • How much should I expect to pay for a Portsmouth to Belfast flight?

    Return flights from Portsmouth to Belfast range from £96 to £164, with an average of £124 over the past 12 months. Anything below £96 counts as a good deal.

  • How expensive are last-minute Portsmouth to Belfast flights?

    Last-minute fares on this route (booked within two weeks of departure) run 21% above the £124 route average. Book 13 weeks before departure for the lowest fares.

  • What is the standard checked bag allowance on flights from Portsmouth to Belfast?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £26–£76 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

  • How are flight departures from Portsmouth to Belfast spread across the day?

    Afternoon is the busiest departure period on Portsmouth to Belfast flights, with 100% leaving in that window. Morning departures account for 0%, Evening flights for 0%, and Night flights for 0%.

  • What car hire options are available in Belfast?

    Since Belfast is served by multiple airports, car hire options and rates can vary depending on which one you fly into.
    Near Belfast City Airport (BHD) – daily rates from around £10:

    • Budget
    • Sixt
    • Enterprise Rent-A-Car
    • Avis
    • Hertz

    Near Belfast Intl Airport (BFS) – daily rates from around £8:

    • Budget
    • DRIVALIA
    • Sixt
    • Alamo
    • Hertz

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

    Yes. Flexible dates can save you up to 30% on flights from Portsmouth to Belfast. Saturday is the cheapest departure day at £110 return on average, while Sunday is the most expensive at £157, a difference of £47.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • Which airlines fly from Portsmouth to Belfast?

    2 airlines operate flights between Portsmouth and Belfast. The airlines offering direct flights on this route include:

    • Aer Lingus
    • easyJet

  • What popular places can I visit in Belfast?

    Some of the most popular sights in Belfast are Waterfront Hall, SSE Arena, and Grand Opera House. These are among the most viewed places in Belfast on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Portsmouth to Belfast flights?

    Among airlines operating Portsmouth to Belfast flights:

    • Aer Lingus: offers extra legroom; offers free seat selection
    • easyJet: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Portsmouth to Belfast flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Aer Lingus: a cabin bag and a checked bag in Economy class
    • British Airways: a cabin bag and a checked bag in Economy class
    • easyJet: a checked bag in Economy class class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Portsmouth to Belfast flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Saturday departure and avoid flying on Sunday. On this route, Saturday flights average £110, about £47 less than Sunday fares (30% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 37% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Portsmouth to Belfast trip for September. Fares historically average £97 return in that month – typically £75 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Belfast City Airport.

    • Titanic Hotel Belfast
    • Park Avenue
    • Premier Inn Belfast Titanic Quarter

More options for your flight from Portsmouth to Belfast

Complete your trip to Belfast with a hotel stay or car hire

Car hire in Belfast
Hotels in Belfast
Holidays in Belfast