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Cheap flights from Northern Ireland to London from £31

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to London departing on 28/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£54easyJet
Sat, 9 May - Sat, 16 May
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
07:50 - 08:55
SOU
-
BFS
25h 05m
1 stop
£71easyJet
Sat, 9 May - Sat, 16 May
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
Aer Lingus Logo
08:55 - 10:35
SOU
-
BHD
1h 40mdirect
£92Aer Lingus
Tue, 24 Feb - Tue, 3 Mar
easyJet Logo
14:30 - 07:20
BFS
-
SOU
16h 50m
1 stop
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£94easyJet
Fri, 8 May - Sun, 17 May
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
Aer Lingus Logo
12:15 - 13:50
SOU
-
BHD
1h 35mdirect
£100Aer Lingus
Tue, 10 Feb - Tue, 10 Feb
easyJet Logo
17:35 - 08:50
BFS
-
SOU
15h 15m
1 stop
easyJet Logo
09:20 - 17:00
SOU
-
BFS
7h 40m
1 stop
£103easyJet
Tue, 24 Feb - Tue, 3 Mar
Aer Lingus Logo
10:10 - 11:50
BHD
-
SOU
1h 40mdirect
Aer Lingus Logo
12:20 - 13:55
SOU
-
BHD
1h 35mdirect
£103Aer Lingus
Thu, 12 Mar - Sun, 15 Mar
easyJet Logo
14:30 - 07:20
BFS
-
SOU
16h 50m
1 stop
easyJet Logo
18:20 - 17:35
SOU
-
BFS
23h 15m
1 stop
£105easyJet
Fri, 8 May - Sun, 17 May
Aer Lingus Logo
16:55 - 18:30
BHD
-
SOU
1h 35mdirect
Aer Lingus Logo
12:15 - 13:50
SOU
-
BHD
1h 35mdirect
£105Aer Lingus
Mon, 23 Feb - Tue, 24 Feb
Multiple Airlines Logo
08:00 - 19:40
BHD
-
SOU
11h 40m
2 stops
Multiple Airlines Logo
12:15 - 13:50
SOU
-
BHD
1h 35mdirect
£149Multiple Airlines
Mon, 23 Feb - Tue, 24 Feb

Aer Lingus flights from Northern Ireland to Southampton

Our best Aer Lingus deals on Northern Ireland to Southampton flight tickets
Aer Lingus
10 Feb
BHD06:40Belfast City
1h 45m
SOU08:25Southampton Eastleigh
10 Feb
SOU12:15Southampton Eastleigh
1h 35m
BHD13:50Belfast City
£100
Aer Lingus
12 Mar
BHD10:10Belfast City
1h 40m
SOU11:50Southampton Eastleigh
15 Mar
SOU12:20Southampton Eastleigh
1h 35m
BHD13:55Belfast City
£103
Aer Lingus
23 Feb
BHD16:55Belfast City
1h 35m
SOU18:30Southampton Eastleigh
24 Feb
SOU12:15Southampton Eastleigh
1h 35m
BHD13:50Belfast City
£105

British Airways flights from Northern Ireland to Southampton

Our best British Airways deals on Northern Ireland to Southampton flight tickets
British Airways
2 Mar
BHD10:10Belfast City
1h 40m
SOU11:50Southampton Eastleigh
3 Mar
SOU12:15Southampton Eastleigh
1h 35m
BHD13:50Belfast City
£228
British Airways
26 Feb
BHD10:10Belfast City
1h 40m
SOU11:50Southampton Eastleigh
5 Mar
SOU12:20Southampton Eastleigh
1h 35m
BHD13:55Belfast City
£229
British Airways
2 Mar
BHD16:55Belfast City
1h 35m
SOU18:30Southampton Eastleigh
3 Mar
SOU08:55Southampton Eastleigh
1h 40m
BHD10:35Belfast City
£229

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland 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, momondo users made 279,928 searches. Data last updated 28 January 2026.
Use the filters below to find and compare flights from Northern Ireland to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 9/5

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sat 16/5

12:15-13:30

Nonstop1h 15m

£54

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 9/5

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sat 16/5

07:50-08:55

1 stop25h 05m

£71

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 24/2

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Tue 3/3

08:55-10:35

Nonstop1h 40m

£92

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 8/5

14:30-07:20

1 stop16h 50m

Southampton Eastleigh

Sun 17/5

12:35-13:50

Nonstop1h 15m

£94

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 10/2

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Tue 10/2

12:15-13:50

Nonstop1h 35m

£100

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Tue 24/2

17:35-08:50

1 stop15h 15m

Southampton Eastleigh

Tue 3/3

09:20-17:00

1 stop7h 40m

£103

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Thu 12/3

10:10-11:50

Nonstop1h 40m

Southampton Eastleigh

Sun 15/3

12:20-13:55

Nonstop1h 35m

£103

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 8/5

14:30-07:20

1 stop16h 50m

Southampton Eastleigh

Sun 17/5

18:20-17:35

1 stop23h 15m

£105

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 23/2

16:55-18:30

Nonstop1h 35m

Southampton Eastleigh

Tue 24/2

12:15-13:50

Nonstop1h 35m

£105

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 23/2

08:00-19:40

2 stops11h 40m

Southampton Eastleigh

Tue 24/2

12:15-13:50

Nonstop1h 35m

£149

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to London from

How to get the cheapest flight ticket from Northern Ireland to Southampton

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Southampton?

The month of March is, on average, the cheapest month to fly to Southampton from Northern Ireland, with most prices found around £72. If you’re not able to fly to Southampton in March, then April is your next best option. Flight prices from Northern Ireland to Southampton during April average around £87.

What is the cheapest day to depart on your flight to Southampton?

Our data shows that Thursday is the least expensive day to fly to Southampton. Tickets to fly out on this day can be as low as £82. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around £112. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southampton.

What is the cheapest time of day to depart on your flight to Southampton?

According to our data, the cheapest time of day to fly to Southampton is at midday. momondo users have found flights departing from Northern Ireland to Southampton at midday for as low as £120. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £136 on average. Flights to Southampton from Northern Ireland in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Northern Ireland to Southampton Eastleigh flight route?

Fly from Belfast Intl to Southampton Eastleigh for the best Northern Ireland - Southampton Eastleigh flight prices

How far in advance should I book a flight to Southampton?

You are more likely to see cheaper flights to Southampton from Northern Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Southampton for around £118 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southampton from Northern Ireland for as low as £70 on momondo.

What cabin class options are available on Northern Ireland to Southampton Eastleigh flights?

There is only 1 cabin class available to choose from on Northern Ireland to Southampton Eastleigh flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Northern Ireland to Southampton flights?

No. A direct flight is the cheapest option for a flight between Northern Ireland to Southampton.

Cheap Northern Ireland to Southampton flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Northern Ireland to Southampton

Best price found

£45

Fastest flight time

1h 15m

Direct flights

Every day

Airports in Southampton

1 airport
The best one-way flight to Southampton from Northern Ireland in the past 72 hours is £45. The best return flight deal from Northern Ireland to Southampton found on momondo in the last 72 hours is £76.
The fastest flight from Northern Ireland to Southampton takes 1h 15m
Direct flights go from Northern Ireland to Southampton every day.
There is 1 airport in Southampton. From Northern Ireland there are direct flights to Southampton Eastleigh (SOU).
Search flight deals

  • When did momondo last update prices for flights from Northern Ireland to Southampton Eastleigh Airport?

    Prices for flights from Northern Ireland to Southampton Eastleigh Airport are updated daily.

  • How many operators does momondo search for flights from Northern Ireland to Southampton Eastleigh Airport?

  • How old do you have to be to fly from Northern Ireland to Southampton Eastleigh Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents required for your trip to Southampton Eastleigh Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southampton Eastleigh Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Northern Ireland to Southampton?

Best airlines flying from Northern Ireland to Southampton

Compare and see reviews for airlines that fly from Northern Ireland to Southampton with momondo
Airline
Rating
Free Cancellation
Price
easyJetPriceFrom £25Free CancellationRating
6.9
1,866 reviews
Search easyJet flights
Aer LingusPriceFrom £72Free CancellationRating
7.2
1,442 reviews
Search Aer Lingus flights

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from Northern Ireland to Southampton?

It is quick and easy to find Northern Ireland to Southampton flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Southampton that suits you.

Can I find flights from Northern Ireland to Southampton with flexible booking policies on momondo?

Flights from Northern Ireland to Southampton with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Northern Ireland to Southampton?

momondo provides multiple filters to help you find the best flight to Southampton from Northern Ireland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Northern Ireland to Southampton right now. Can momondo alert me if prices change?

Price alerts on flights to Southampton from Northern Ireland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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