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Cheap flights from Southampton to Belfast from £46

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — BHD
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Southampton Eastleigh to Belfast are usually found in January or February, booked 83 days in advance, depart on a Tuesday or Saturday and return on a Saturday

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Cheapest flights from Southampton to Belfast
Explore the most affordable flight options available from Southampton to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 November 2025.

Wed 3/1208:55SOU - BHD
Nonstop1h 40mAer Lingus
Wed 10/1206:40BHD - SOU
Nonstop1h 45mAer Lingus
Deal found 6/11£86
Wed 12/1108:55SOU - BHD
Nonstop1h 40mAer Lingus
Tue 18/1106:40BHD - SOU
Nonstop1h 45mAer Lingus
Deal found 6/11£93
Thu 4/1219:00SOU - BHD
Nonstop1h 35mAer Lingus
Thu 11/1210:10BHD - SOU
Nonstop1h 40mAer Lingus
Deal found 6/11£97
Mon 17/1119:00SOU - BHD
Nonstop1h 35mAer Lingus
Thu 20/1116:55BHD - SOU
Nonstop1h 35mAer Lingus
Deal found 6/11£102
Wed 3/1208:55SOU - BHD
Nonstop1h 40mMultiple Airlines
Wed 10/1216:50BHD - SOU
2 stops15h 55mMultiple Airlines
Deal found 6/11£140
Fri 12/1219:00SOU - BHD
Nonstop1h 35mAer Lingus
Sun 14/1210:10BHD - SOU
Nonstop1h 40mAer Lingus
Deal found 6/11£150
Thu 4/1219:00SOU - BHD
Nonstop1h 35mMultiple Airlines
Thu 11/1214:15BHD - SOU
2 stops23h 30mMultiple Airlines
Deal found 6/11£152
Mon 17/1119:00SOU - BHD
Nonstop1h 35mMultiple Airlines
Thu 20/1111:00BHD - SOU
2 stops21h 45mMultiple Airlines
Deal found 6/11£156
Wed 12/1108:55SOU - BHD
Nonstop1h 40mAer Lingus
Wed 12/1116:55BHD - SOU
Nonstop1h 35mAer Lingus
Deal found 6/11£161
Wed 12/1108:55SOU - BHD
Nonstop1h 40mMultiple Airlines
Wed 12/1116:50BHD - SOU
2 stops15h 55mMultiple Airlines
Deal found 6/11£167
Sun 30/1118:25SOU - BFS
1 stop13h 00mMultiple Airlines
Wed 3/1207:15BFS - SOU
2 stops25h 30mMultiple Airlines
Deal found 5/11£193
Mon 17/1119:55SOU - BFS
2 stops23h 10mMultiple Airlines
Tue 18/1121:35BFS - SOU
2 stops14h 20mMultiple Airlines
Deal found 5/11£209

Cheap flight deals from Southampton to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Belfast (BF1). 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 7 November 2025.

Round-trip from

£86

One-way from

£46

Popular in

July

Cheapest in

January

Average price

£112
Aer Lingus
  • Aer Lingus
  • 3/12-10/12
  • Nonstop
  • 3h 25m total
  • Southampton to Belfast
Search Deals
Aer Lingus
  • Aer Lingus
  • 26/11
  • Nonstop
  • 1h 40m total
  • Southampton to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Belfast 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 7 November 2025.
Use the filters below to find and compare flights from Southampton to Belfast that are best for you.

Fly from

Southampton

Fly to

Belfast

Route

Depart

Return

Price

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Thu 4/12

19:00-20:35

Nonstop1h 35m

Belfast City

Thu 11/12

10:10-11:50

Nonstop1h 40m

£97

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 30/1

17:45-07:25

1 stop13h 40m

Belfast Intl

Sun 1/2

11:30-17:45

1 stop6h 15m

£118

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sun 1/2

18:20-20:20

1 stop26h 00m

Belfast Intl

Wed 4/2

20:40-17:20

1 stop20h 40m

£120

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sun 1/3

18:20-20:20

1 stop26h 00m

Belfast Intl

Wed 4/3

20:40-17:20

1 stop20h 40m

£132

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Wed 3/12

08:55-10:35

Nonstop1h 40m

Belfast City

Wed 10/12

16:50-08:45

2 stops15h 55m

£140

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 27/2

17:45-07:25

1 stop13h 40m

Belfast Intl

Mon 2/3

20:50-08:50

1 stop12h 00m

£147

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Fri 27/2

12:20-13:55

Nonstop1h 35m

Belfast City

Mon 2/3

08:00-17:20

1 stop9h 20m

£149

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Fri 12/12

19:00-20:35

Nonstop1h 35m

Belfast City

Sun 14/12

10:10-11:50

Nonstop1h 40m

£150

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Mon 23/2

08:30-09:35

2 stops25h 05m

Belfast City

Thu 26/2

10:10-11:50

Nonstop1h 40m

£152

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Fri 30/1

08:10-19:35

2 stops11h 25m

Belfast City

Sun 1/2

10:10-11:50

Nonstop1h 40m

£152

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 33 results
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Best time to book a flight from Southampton to Belfast

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

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

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

Booking 83 days in advance of your planned departure date is, on average, the best time to get cheap flights from Southampton to Belfast. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Southampton to Belfast (average of £15). Flying from Southampton to Belfast in August is currently the most expensive (average of £40). 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 SOU to BFS?

Find hourly flight availability from Southampton to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

One of the essential ways to save on airfare from Southampton to Belfast is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 54% on airfare.

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. 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 Belfast. Reviews last updated 7 November 2025.
Read reviews from past customers who have flown with Aer Lingus and easyJet from Southampton to Belfast. 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
1,365 reviews
Check prices

Comfort

7.1

Entertainment

6.9

Food

6.6

Overall

7.2

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Comfort

7.1

Entertainment

6.9

Food

6.6

Overall

7.2

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
easyJet
6.9
Okay
1,841 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Comfort

7.1

Entertainment

6.9

Food

6.6

Overall

7.2

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Belfast. 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 from for flights from Southampton to Belfast?

    For a flight from Southampton to Belfast, you will be flying from Eastleigh. Southampton Eastleigh (SOU) is just 3.5 mi from the center of the city. Eastleigh is the only Southampton airport and it handles 0 outbound flights to Belfast per day. 2 airlines have flights to Belfast from Southampton Eastleigh on a regular basis.

  • How long is the flight from Southampton to Belfast?

    There are many flights that can get you from Southampton to Belfast in 1h 35m. 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 flying from Southampton to Belfast round-trip?

    Our cheapest airline available from Southampton to Belfast is easyJet. Our recent data shows that you can find tickets from as low as £36 on this airline. An additional option worth looking into is Aer Lingus, starting at £64. You may be able to fly from Southampton to Belfast for 64% less than the average price by searching for these airlines.

  • What are the cheapest flights from Southampton to Belfast?

    Looking at all options, your cheapest flight can be booked for £25. While the most popular route (Southampton Eastleigh - Belfast Intl) can be booked for £86 on average, our data indicates £102 when flying from Southampton to Belfast.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton 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.

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

    Currently, January is the cheapest month in which you can book a flight from Southampton to Belfast (average of £15). Flying from Southampton to Belfast in August is currently the most expensive (average of £40). 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 Southampton to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Southampton to Belfast

Discover the top 2 airlines that operate flights from Southampton to Belfast. 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£36Average£78FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£64Average£111FlexibilityNo 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 Southampton to Belfast?

Cheapflights makes it easy to find Southampton to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Belfast from Southampton.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Southampton to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Southampton to Belfast become cheaper?

Yes, Cheapflights offers price alerts on Southampton to Belfast 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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