Cheap flights from Belfast Intl Airport to Portsmouth from £17
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LHR
7 Oct — 14 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast Intl to Portsmouth are usually found in April or March, booked 70 days in advance, depart on a Tuesday or Thursday and return on a Thursday
Cheap flight deals from Belfast Intl to Portsmouth
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from Belfast Intl to Portsmouth
Explore the most affordable flight options available from Belfast Intl to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 September 2026.
Mon 12/1010:35 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 5/9£39
Mon 12/1010:35 -
Nonstop1h 15m
Sun 18/1012:35 -
Nonstop1h 15m
Deal found 3/9£40
Sun 4/1010:50 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 3/9£44
Sat 3/1010:30 -
Nonstop1h 15m
Sun 4/1012:35 -
Nonstop1h 15m
Deal found 5/9£47
Sun 4/1010:50 -
Nonstop1h 15m
Mon 5/1012:25 -
Nonstop1h 15m
Deal found 4/9£52
Mon 5/1010:35 -
Nonstop1h 15m
Mon 12/1012:25 -
Nonstop1h 15m
Deal found 7/9£56
Sat 26/910:30 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 3/9£74
Best flights from Belfast Intl to Portsmouth
Discover carefully curated flight deals from Belfast Intl to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.
Mon 12/1010:35 -
Nonstop1h 15m
Sun 18/1012:35 -
Nonstop1h 15m
Deal found 3/9£40
Sun 4/1010:50 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 3/9£44
Sun 4/1010:50 -
Nonstop1h 15m
Mon 5/1012:25 -
Nonstop1h 15m
Deal found 4/9£52
Mon 5/1010:35 -
Nonstop1h 15m
Mon 12/1012:25 -
Nonstop1h 15m
Deal found 7/9£56
Sat 26/910:30 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 3/9£74
Mon 12/1010:35 -
Nonstop1h 15m
Sat 17/1007:50 -
1 stop24h 15m
Deal found 7/9£89
Sat 3/1022:25 -
1 stop11h 00m
Sun 4/1012:35 -
Nonstop1h 15m
Deal found 7/9£89
Direct flights from Belfast Intl to Portsmouth
Explore direct flight options from Belfast Intl to Portsmouth based on user searches, and compare prices and availability for your desired travel dates. Data last updated 7 September 2026.
Mon 12/1010:35 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 5/9£39
Mon 12/1010:35 -
Nonstop1h 15m
Sun 18/1012:35 -
Nonstop1h 15m
Deal found 3/9£40
Sun 4/1010:50 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 3/9£44
Sat 3/1010:30 -
Nonstop1h 15m
Sun 4/1012:35 -
Nonstop1h 15m
Deal found 5/9£47
Sun 4/1010:50 -
Nonstop1h 15m
Mon 5/1012:25 -
Nonstop1h 15m
Deal found 4/9£52
Mon 5/1010:35 -
Nonstop1h 15m
Mon 12/1012:25 -
Nonstop1h 15m
Deal found 7/9£56
Sat 26/910:30 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 3/9£74
Last-minute flights from Belfast Intl to Portsmouth
Discover last-minute flight deals from Belfast Intl to Portsmouth. Data last updated 7 September 2026 and is based on user searches.
Sat 26/910:30 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 3/9£74
Sat 3/1010:30 -
Nonstop1h 15m
Sun 4/1012:35 -
Nonstop1h 15m
Deal found 5/9£47
Sun 4/1010:50 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 3/9£44
Sun 4/1010:50 -
Nonstop1h 15m
Mon 5/1012:25 -
Nonstop1h 15m
Deal found 4/9£52
Mon 5/1010:35 -
Nonstop1h 15m
Mon 12/1012:25 -
Nonstop1h 15m
Deal found 7/9£56
Mon 12/1010:35 -
Nonstop1h 15m
Sat 17/1012:15 -
Nonstop1h 15m
Deal found 5/9£39
Mon 12/1010:35 -
Nonstop1h 15m
Sun 18/1012:35 -
Nonstop1h 15m
Deal found 3/9£40
One-way flights from Belfast Intl to Portsmouth
Search for one-way flight options from Belfast Intl to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.
Mon 12/1010:35 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£17
Fri 23/1013:35 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£30
Sun 20/910:50 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£31
Sun 13/910:50 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£39
Sat 12/910:30 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/9£41
Mon 21/910:35 -
Nonstop1h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£45
Tue 15/1216:45 -
1 stop16h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 6/9£47
Mon 14/1206:20 -
1 stop10h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/9£60
Wed 18/1118:55 -
1 stop13h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£62
Wed 23/921:05 -
1 stop11h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£65
Mon 14/1207:15 -
2 stops12h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/9£83
Find flight deals from Belfast Intl to Portsmouth
Keep the following information in mind while searching for Belfast Intl to Portsmouth flight deals. Data was last updated 7 September 2026.
Customise your flight search to find flights from Belfast Intl 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 7,457,451 searches. Data last updated 7 September 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Portsmouth that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
Fastest return journey
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Mon 12/10
10:35-11:50
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£17
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Fri 23/10
13:35-14:50
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£30
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Sun 20/9
10:50-12:05
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£31
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Mon 14/9
10:35-11:50
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£39
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Sun 13/9
10:50-12:05
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£39
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Mon 12/10
10:35-11:50
Nonstop1h 15m
Southampton Eastleigh
Sun 18/10
12:35-13:50
Nonstop1h 15m
£40
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Sat 12/9
10:30-11:45
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£41
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Sun 4/10
10:50-12:05
Nonstop1h 15m
Southampton Eastleigh
Sat 17/10
12:15-13:30
Nonstop1h 15m
£44
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Mon 21/9
10:35-11:50
Nonstop1h 15m
Southampton Eastleigh
Wed 31/12
00:00-00:00
Nonstop0h 00m
£45
BelfastSouthampton
BFS Belfast Intl - SOU Southampton Eastleigh
BFSSOU
Belfast Intl
Sun 4/10
10:50-12:05
Nonstop1h 15m
Southampton Eastleigh
Mon 5/10
12:25-13:40
Nonstop1h 15m
£52
Flights are sorted by cheapest return flights first.
Deals found on 7/9
Showing 1-10 of 18 resultsSorted by cheapest first
1
2
Best time to book a flight from Belfast Intl to Portsmouth
Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Belfast Intl with our price prediction graph.
BFS-SOU
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 Intl Airport to Portsmouth
BFS-P0R
BFS-SOU
What is the cheapest time of day to fly from BFS to P0R?
Find hourly flight availability from Belfast Intl 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 7 September 2026.
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 14% on your trip compared to booking a flight in the evening.
How much does it cost for a return flight from Belfast Intl Airport to Portsmouth?
Airfare is below average for this route at the moment.
Belfast Intl Airport to Portsmouth flights typically cost between £78 and £150 in October.The cheapest return price found within the last 5 days was £39 on easyJet (12 Oct–17 Oct).
What is the cheapest day to fly from Belfast Intl Airport to Portsmouth?
Use this chart to determine the cheapest time to fly return from Belfast Intl to Portsmouth. Price data was last updated on 5 September 2026.
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
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 7 September 2026.
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.
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.
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.
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
Find useful and relevant information for your journey from Belfast Intl 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 Intl Airport to Portsmouth?
For as low as £40, easyJet can have you in Portsmouth from Belfast Intl Airport in 1h 15m. There are 326 mi between Belfast Intl Airport and Portsmouth. Generally, flights for this route are direct.
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 through other flights departing from Belfast Intl. Flights are based on user searches made on Cheapflights and were last updated on 7 September 2026.
Top 4 airlines flying from Belfast Intl to Portsmouth
Discover the top 4 airlines that operate flights from Belfast Intl 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 7,457,451 searches. Data last updated 7 September 2026.
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 Intl to Portsmouth?
Cheapflights helps you search for flights from Belfast Intl to Portsmouth via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Portsmouth?
Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Portsmouth by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
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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