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Cheap flights from Belfast Intl Airport to Portsmouth

BFS — LHR
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast Intl to Portsmouth are usually found in March or October, booked 46 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Find flight deals from Belfast Intl to Portsmouth

Popular in

January

Cheapest in

March

Average price

£97
Highest demand for flights based on searches. 20% potential increase in price (£25 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to Portsmouth

What is the cheapest time of day to fly from BFS to P0R?

A simple way to save on the total cost of your ticket is to fly from Belfast Intl Airport to Portsmouth at midday. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Belfast Intl Airport to Portsmouth?

Travellers seeking maximum savings on their Belfast Intl Airport to Portsmouth flight should consider departing on Tuesday at midday when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portsmouth

Check out reviews from past customers who have flown with Aer Lingus and easyJet from Belfast Intl Airport to Portsmouth to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,854 reviews
Check prices

Comfort

7.2

Food

6.7

Boarding

7.5

Entertainment

7.0

Overall

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,854 reviews
Aer Lingus
7.3
Good
1,854 reviews
Check prices

Comfort

7.2

Food

6.7

Boarding

7.5

Entertainment

7.0

Overall

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
easyJet
6.9
Okay
1,922 reviews
Aer Lingus
7.3
Good
1,854 reviews
Check prices

Comfort

7.2

Food

6.7

Boarding

7.5

Entertainment

7.0

Overall

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Related info for your journey

  • Can I find deals for flights from Belfast Intl to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Belfast Intl to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast Intl to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Portsmouth.

  • Can I find deals for business class flights from Belfast Intl to Portsmouth?

    Yes. Cheapflights offers flight deals from Belfast Intl to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Belfast Intl to Portsmouth

AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£18Average£66FlexibilityNo cancel feeOn-timeN/A
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easyJetCheapest£19Average£88FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£82Average£135FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£91Average£166FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Portsmouth?

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Can Cheapflights find flights from Belfast Intl to Portsmouth with no change fees?

Certainly. Search results for flights to Portsmouth from Belfast Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Belfast Intl to Portsmouth become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Portsmouth from Belfast Intl today and book when prices fit your budget.

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