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Cheap flights from Belfast to Portsmouth from £94

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — LHR
2 Dec — 9 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Belfast to Portsmouth are usually found in March or January, booked 33 days in advance, depart on a Saturday or Wednesday and return on a Tuesday

Cheap flight deals from Belfast to Portsmouth

Keep the following information in mind while searching for Belfast to Portsmouth flight deals. Data was last updated 2 November 2025.

Round-trip from

£94

Popular in

June

Cheapest in

March

Average price

£109
Aer Lingus
  • Aer Lingus
  • 8/12-9/12
  • Nonstop
  • 3h 15m total
  • Belfast to Portsmouth
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£28 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Belfast to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Portsmouth
Explore the most affordable flight options available from Belfast to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 November 2025.

Mon 8/1210:10BHD - SOU
Nonstop1h 40mAer Lingus
Tue 9/1219:00SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 30/10£94
Thu 6/1110:10BHD - SOU
Nonstop1h 40mAer Lingus
Wed 12/1108:55SOU - BHD
Nonstop1h 40mAer Lingus
Deal found 2/11£106
Mon 8/1208:15BFS - SOU
1 stop3h 10measyJet
Tue 9/1209:20SOU - BFS
1 stop7h 40measyJet
Deal found 30/10£116
Fri 28/1116:55BHD - SOU
Nonstop1h 35mAer Lingus
Tue 2/1208:55SOU - BHD
Nonstop1h 40mAer Lingus
Deal found 1/11£135
Sat 22/1106:40BHD - SOU
Nonstop1h 45mAer Lingus
Sun 23/1112:20SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 2/11£136
Mon 8/1216:55BHD - SOU
2 stops15h 55mMultiple Airlines
Tue 9/1219:00SOU - BHD
Nonstop1h 35mMultiple Airlines
Deal found 30/10£137
Thu 20/1116:55BHD - SOU
Nonstop1h 35mAer Lingus
Sun 23/1112:20SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 31/10£138
Tue 30/1206:40BHD - SOU
Nonstop1h 45mAer Lingus
Sat 3/108:55SOU - BHD
Nonstop1h 40mAer Lingus
Deal found 31/10£141
Fri 28/1107:00BHD - SOU
1 stop8h 50mMultiple Airlines
Tue 2/1208:55SOU - BHD
Nonstop1h 40mMultiple Airlines
Deal found 1/11£168
Mon 15/1220:50BFS - SOU
1 stop12h 00measyJet
Mon 22/1212:05SOU - BFS
1 stop19h 50measyJet
Deal found 31/10£183
Mon 15/1220:50BFS - SOU
1 stop12h 00mMultiple Airlines
Mon 22/1219:55SOU - BFS
2 stops17h 50mMultiple Airlines
Deal found 31/10£189
Sat 22/1107:55BFS - SOU
1 stop5h 15measyJet
Sun 23/1118:20SOU - BFS
1 stop26h 00measyJet
Deal found 2/11£210

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 November 2025.
Use the filters below to find and compare flights from Belfast to Portsmouth that are best for you.

Fly from

Belfast

Fly to

Portsmouth

Route

Depart

Return

Price

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 8/12

10:10-11:50

Nonstop1h 40m

Southampton Eastleigh

Tue 9/12

19:00-20:35

Nonstop1h 35m

£94

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Fri 13/2

16:55-18:30

Nonstop1h 35m

Southampton Eastleigh

Mon 16/2

19:00-20:35

Nonstop1h 35m

£104

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 8/12

08:15-11:25

1 stop3h 10m

Southampton Eastleigh

Tue 9/12

09:20-17:00

1 stop7h 40m

£116

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Fri 28/11

16:55-18:30

Nonstop1h 35m

Southampton Eastleigh

Tue 2/12

08:55-10:35

Nonstop1h 40m

£135

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sun 15/3

10:10-11:50

Nonstop1h 40m

Southampton Eastleigh

Mon 16/3

12:20-13:55

Nonstop1h 35m

£135

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 8/12

16:55-08:50

2 stops15h 55m

Southampton Eastleigh

Tue 9/12

19:00-20:35

Nonstop1h 35m

£136

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sat 22/11

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Sun 23/11

12:20-13:55

Nonstop1h 35m

£136

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Thu 20/11

16:55-18:30

Nonstop1h 35m

Southampton Eastleigh

Sun 23/11

12:20-13:55

Nonstop1h 35m

£138

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 7/2

07:00-13:10

1 stop6h 10m

Southampton Eastleigh

Tue 10/2

09:20-17:00

1 stop7h 40m

£140

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 30/12

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Sat 3/1

08:55-10:35

Nonstop1h 40m

£141

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Belfast to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Belfast with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Belfast to Portsmouth?

Use this chart to determine the optimal time to book a return flight from Belfast to Portsmouth. Price data was last updated on 31 October 2025.

The price you pay for your flight from Belfast to Portsmouth may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Belfast to Portsmouth?

Currently, March is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £14). Flying from Belfast to Portsmouth in July is currently the most expensive (average of £48). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Belfast to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 November 2025.

A simple way to save on the total cost of your ticket is to fly from Belfast to Portsmouth in the evening. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from Belfast to Portsmouth. Price data was last updated on 16 December 2024.

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

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated 2 November 2025.
Get a feel of what it's like to fly with Aer Lingus and easyJet from Belfast to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
easyJet
6.9
Okay
1,840 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.

Related info for your journey

Find useful and relevant information for your journey from Belfast to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Belfast to Portsmouth?

    There are many flights that can get you from Belfast to Portsmouth in 1h 40m. Fly via Aer Lingus or easyJet to get the fastest option. Airlines will cover a distance of 316 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Belfast to Portsmouth one-way?

    £120 is the cheapest one-way deal found within the past few days, from easyJet. You may also be able to find cheap deals on Aer Lingus and Loganair, with prices starting from £268 and £345, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast 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.

  • What is the cheapest month to book a flight from Belfast to Portsmouth?

    Currently, March is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £14). Flying from Belfast to Portsmouth in July is currently the most expensive (average of £48). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 6 airlines flying from Belfast to Portsmouth

Discover the top 6 airlines that operate flights from Belfast to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 November 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£21Average£55FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£31Average£94FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£49Average£65FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£72Average£160FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£78Average£159FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£136Average£209FlexibilityNo cancel feeOn-time79%
Search Loganair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast to Portsmouth?

Deals for Belfast to Portsmouth flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast to Portsmouth for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Portsmouth from Belfast 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 to Portsmouth become cheaper?

Yes, Cheapflights offers price alerts on Belfast to Portsmouth flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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