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Cheap flights from Belfast Intl Airport to Southampton from £51

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 21/10. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SOU
9 Nov — 16 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Belfast Intl to Southampton Eastleigh are usually found in March or January, booked 34 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

Cheap 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 10 October 2025.

Round-trip from

£120

One-way from

£51

Popular in

June

Cheapest in

March

Average price

£115

Good round-trip deal

£67 or less

Good one-way deal

£45 or less
easyJet
  • easyJet
  • 8/12-15/12
  • 2 total stops
  • 11h 25m total
  • Belfast to Southampton
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easyJet
  • easyJet
  • 21/10
  • 1 total stop
  • 20h 05m total
  • Belfast to Southampton
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Highest demand for flights based on searches. 26% potential increase in price (£29 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 2025
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Price to beat on a round-trip flight from Belfast Intl to Southampton Eastleigh.
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Price to beat on a one-way flight from Belfast Intl to Southampton Eastleigh.
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Find 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 10 October 2025.

Sat 18/1013:35BFS - SOU
Nonstop1h 15measyJet
Mon 20/1018:35SOU - BFS
Nonstop1h 20measyJet
Deal found 9/10£55
Sun 19/1010:10BFS - SOU
Nonstop1h 15measyJet
Mon 20/1018:35SOU - BFS
Nonstop1h 20measyJet
Deal found 10/10£62
Fri 17/1010:30BFS - SOU
Nonstop1h 15measyJet
Sun 19/1012:00SOU - BFS
Nonstop1h 20measyJet
Deal found 10/10£95
Fri 12/1210:35BFS - SOU
1 stop6h 35measyJet
Sun 14/1218:20SOU - BFS
1 stop13h 25measyJet
Deal found 9/10£127
Sat 18/1013:35BFS - SOU
Nonstop1h 15mMultiple Airlines
Mon 20/1020:30SOU - BFS
2 stops18h 50mMultiple Airlines
Deal found 9/10£128
Sat 25/1013:35BFS - SOU
Nonstop1h 15measyJet
Mon 3/1112:05SOU - BFS
1 stop19h 50measyJet
Deal found 9/10£130
Sun 23/1115:45BFS - SOU
2 stops27h 35mMultiple Airlines
Sun 30/1118:20SOU - BFS
1 stop13h 25mMultiple Airlines
Deal found 9/10£155

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 10 October 2025.
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

Fri 12/12

10:35-17:10

1 stop6h 35m

Southampton Eastleigh

Sun 14/12

18:20-07:45

1 stop13h 25m

£127

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Mon 3/11

12:05-07:55

1 stop19h 50m

£130

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sun 23/11

15:45-19:20

2 stops27h 35m

Southampton Eastleigh

Sun 30/11

18:20-07:45

1 stop13h 25m

£155

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Mon 3/11

19:55-20:30

2 stops24h 35m

£176

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 8/11

12:45-08:45

2 stops20h 00m

Southampton Eastleigh

Sat 15/11

09:30-15:10

1 stop5h 40m

£188

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sun 23/11

21:45-11:25

1 stop13h 40m

Southampton Eastleigh

Sun 30/11

18:20-07:45

1 stop13h 25m

£191

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Thu 30/10

17:55-08:00

1 stop14h 05m

£192

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Thu 20/11

16:00-08:45

2 stops16h 45m

Southampton Eastleigh

Tue 25/11

09:20-17:00

1 stop7h 40m

£193

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Wed 5/11

08:20-13:55

1 stop5h 35m

Southampton Eastleigh

Wed 12/11

14:25-20:15

1 stop5h 50m

£196

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Wed 29/10

14:25-20:15

1 stop5h 50m

£202

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 13 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 10 October 2025.

To ensure you get the cheapest price possible for a flight from Belfast Intl Airport to Southampton, you should look to book at least 33 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, March is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £14). Flying from Belfast Intl Airport to Southampton in July is currently the most expensive (average of £47). 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 10 October 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 62% 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 10 October 2025.
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
1,328 reviews
Check prices

Comfort

7.1

Food

6.5

Boarding

7.4

Overall

7.2

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,328 reviews
Aer Lingus
7.2
Good
1,328 reviews
Check prices

Comfort

7.1

Food

6.5

Boarding

7.4

Overall

7.2

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
easyJet
6.9
Okay
1,835 reviews
Aer Lingus
7.2
Good
1,328 reviews
Check prices

Comfort

7.1

Food

6.5

Boarding

7.4

Overall

7.2

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

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 6h 35m. 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 £40, 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 £69. These flights start at 63% 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 £67 for a flight from Belfast Intl Airport to Southampton. The cheapest flight overall is £26 while the most popular route, (Belfast Intl - Southampton Eastleigh) is currently priced at £55.

  • 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, March is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £14). Flying from Belfast Intl Airport to Southampton in July is currently the most expensive (average of £47). 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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Alternative routes for Belfast Intl to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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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 10 October 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£40Average£109FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£69Average£123FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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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