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Cheap flights from Belfast Intl Airport to Southampton from £35

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/3. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SOU
6 Mar — 13 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast Intl to Southampton Eastleigh are usually found in March or April, booked 76 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Belfast Intl to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Southampton
Explore the most affordable flight options available from Belfast Intl to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 February 2026.

Sat 19/910:30
BFS
-
SOU
Nonstop1h 15m
easyJet
Sat 26/912:15
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 3/2£102
Mon 16/320:50
BFS
-
SOU
1 stop12h 00m
easyJet
Wed 18/309:25
SOU
-
BFS
1 stop3h 20m
easyJet
Deal found 4/2£145
Wed 4/320:40
BFS
-
SOU
1 stop20h 40m
easyJet
Wed 11/309:25
SOU
-
BFS
1 stop3h 20m
easyJet
Deal found 4/2£149
Mon 16/320:50
BFS
-
SOU
1 stop12h 00m
Multiple Airlines
Wed 18/309:25
SOU
-
BFS
2 stops23h 55m
Multiple Airlines
Deal found 4/2£155
Fri 13/310:35
BFS
-
SOU
1 stop6h 35m
easyJet
Mon 16/317:45
SOU
-
BFS
1 stop14h 10m
easyJet
Deal found 4/2£159
Wed 4/315:45
BFS
-
SOU
2 stops17h 00m
Multiple Airlines
Wed 11/309:25
SOU
-
BFS
1 stop3h 20m
Multiple Airlines
Deal found 4/2£162
Sat 25/413:45
BFS
-
SOU
1 stop5h 35m
Multiple Airlines
Sun 26/412:35
SOU
-
BFS
Nonstop1h 15m
Multiple Airlines
Deal found 2/2£170
Fri 6/311:45
BFS
-
SOU
1 stop5h 25m
easyJet
Sun 8/318:20
SOU
-
BFS
1 stop13h 25m
easyJet
Deal found 2/2£176
Sat 21/307:20
BFS
-
SOU
2 stops25h 25m
Multiple Airlines
Sat 28/317:15
SOU
-
BFS
1 stop4h 45m
Multiple Airlines
Deal found 4/2£179

Find flight deals from Belfast Intl to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 February 2026.

Round-trip from

£145

One-way from

£35

Popular in

June

Cheapest in

March

Average price

£94

Good round-trip deal

£77 or less
easyJet
  • easyJet
  • 16/3-18/3
  • 2 total stops
  • 15h 20m total
  • Belfast to Southampton
Search Deals
easyJet
  • easyJet
  • 29/3
  • Nonstop
  • 1h 15m total
  • Belfast to Southampton
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Belfast Intl to Southampton Eastleigh.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Southampton 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 4 February 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Southampton that are best for you.

Fly from

Belfast Intl

Fly to

Southampton

Route

Depart

Return

Price

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 16/3

20:50-08:50

1 stop12h 00m

Southampton Eastleigh

Wed 18/3

09:25-12:45

1 stop3h 20m

£145

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Wed 4/3

20:40-17:20

1 stop20h 40m

Southampton Eastleigh

Wed 11/3

09:25-12:45

1 stop3h 20m

£149

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 16/3

20:50-08:50

1 stop12h 00m

Southampton Eastleigh

Wed 18/3

09:25-09:20

2 stops23h 55m

£155

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 13/3

10:35-17:10

1 stop6h 35m

Southampton Eastleigh

Mon 16/3

17:45-07:55

1 stop14h 10m

£159

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/4

13:45-19:20

1 stop5h 35m

Southampton Eastleigh

Sun 26/4

12:35-13:50

Nonstop1h 15m

£170

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 6/3

11:45-17:10

1 stop5h 25m

Southampton Eastleigh

Sun 8/3

18:20-07:45

1 stop13h 25m

£176

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 27/6

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sat 4/7

07:50-21:50

1 stop14h 00m

£183

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 13/3

10:35-17:10

1 stop6h 35m

Southampton Eastleigh

Sun 15/3

18:20-20:20

1 stop26h 00m

£186

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Wed 4/3

15:45-08:45

2 stops17h 00m

Southampton Eastleigh

Wed 11/3

09:25-21:50

2 stops12h 25m

£191

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 16/3

07:50-17:30

1 stop9h 40m

Southampton Eastleigh

Mon 16/3

19:55-13:25

2 stops17h 30m

£194

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 16 results
1
2

Best time to book a flight from Belfast Intl to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Belfast Intl 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 Intl Airport to Southampton

How far ahead should I book a flight from Belfast Intl Airport to Southampton?

Use this chart to determine the optimal time to book a return flight from Belfast Intl to Southampton. Price data was last updated on 30 January 2026.

To ensure you get the cheapest price possible for a flight from Belfast Intl Airport to Southampton, you should look to book at least 76 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Belfast Intl Airport to Southampton?

Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £24). Flying from Belfast Intl Airport to Southampton in June is currently the most expensive (average of £53). 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 SOU?

Find hourly flight availability from Belfast Intl to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 February 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 58% on flights from Belfast Intl Airport to Southampton by exploring options for tickets at midday.

Reviews of airlines servicing Southampton

Get insights into the airlines that provide service to Southampton. 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 Southampton. Reviews last updated 4 February 2026.
Read reviews from past customers who have flown with Aer Lingus and easyJet from Belfast Intl Airport to Southampton. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,445 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.
Aer Lingus
7.2
Good
1,445 reviews
Aer Lingus
7.2
Good
1,445 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.
easyJet
6.9
Okay
1,868 reviews
Aer Lingus
7.2
Good
1,445 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Boarding

7.4

Crew

8.0

Food

6.6

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.

Related info for your journey

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

  • What airport do you fly into for flights to Southampton from Belfast Intl?

    Southampton Eastleigh (SOU) is the airport you will fly into if you book a flight from Belfast Intl to Southampton. You should not have trouble finding flights to Eastleigh from Belfast Intl; the airport handles an average of 0 inbound flights from Belfast Intl per day. You should also have plenty of airline options to choose from since 2 airlines have flights to the Southampton airport from Belfast Intl. It is only a 3.5 mi journey from Eastleigh (SOU) to Southampton’s city center.

  • How long is the flight from Belfast Intl Airport to Southampton?

    Departing from Belfast Intl Airport to Southampton will take you 20h 40m. Belfast Intl Airport and Southampton are separated by a distance of 326 mi.

  • What are the cheapest airlines flying from Belfast Intl Airport to Southampton round-trip?

    Currently priced at £25, easyJet will fly you from Belfast Intl Airport to Southampton and back. In addition to easyJet, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Aer Lingus for as low as £75. These flights start at 79% lower than the current average price 3 months from now.

  • What are the cheapest flights from Belfast Intl Airport to Southampton?

    On average you can expect to pay £98 for a flight from Belfast Intl Airport to Southampton. The cheapest flight overall is £49 while the most popular route, (Belfast Intl - Southampton Eastleigh) is currently priced at £45.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Southampton 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 Intl Airport to Southampton?

    Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £24). Flying from Belfast Intl Airport to Southampton in June is currently the most expensive (average of £53). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Belfast Intl to Southampton

Discover the top 2 airlines that operate flights from Belfast Intl to Southampton. 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 4 February 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£25Average£97FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£75Average£126FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 Intl to Southampton?

When you search for this flight from Belfast Intl to Southampton, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Southampton 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 Southampton with no change fees?

Certainly. Search results for flights to Southampton 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 Southampton become cheaper?

Of course! You can now track prices for flights from Belfast Intl to Southampton and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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