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Cheap flights from Portsmouth to Belfast

LHR — BHD
23 Oct — 30 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portsmouth to Belfast are usually found in September or October, booked 59 days in advance, depart on a Tuesday or Friday and return on a Tuesday

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Popular in

December

Cheapest in

September

Average price

£80
Highest demand for flights based on searches. 19% potential increase in price (£21 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Cheapflights Insights

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

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

One of the essential ways to save on airfare from Portsmouth to Belfast is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 43% on airfare.

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

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

Reviews of airlines servicing Belfast

See what other customers who have flown with Aer Lingus and easyJet from Portsmouth to Belfast have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,783 reviews
Check prices

Crew

8.1

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Food

6.7

Overall

7.3

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
1,783 reviews
Aer Lingus
7.3
Good
1,783 reviews
Check prices

Crew

8.1

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Food

6.7

Overall

7.3

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
1,930 reviews
Aer Lingus
7.3
Good
1,783 reviews
Check prices

Crew

8.1

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Food

6.7

Overall

7.3

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 Portsmouth to Belfast that include hotel bookings?

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

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

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

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

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

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Alternative routes for Portsmouth to Belfast

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Top 5 airlines flying from Portsmouth to Belfast

AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£14Average£82FlexibilityNo cancel feeOn-time86%
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RyanairCheapest£19Average£58FlexibilityNo cancel feeOn-timeN/A
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Aer LingusCheapest£80Average£129FlexibilityNo cancel feeOn-timeN/A
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British AirwaysCheapest£93Average£182FlexibilityNo cancel feeOn-time70%
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LoganairCheapest£142Average£250FlexibilityNo cancel feeOn-time79%
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