Question 1

How many flights depart from Northern Ireland to Southampton on average per week?

Accepted Answer

The number of flights available between Northern Ireland and Southampton is 26 per week as of November 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

Question 2

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

Accepted Answer

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 £124. 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.

Question 3

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

Accepted Answer

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 £120 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 £73 on momondo.

Question 4

What is the cheapest airline that flies from Northern Ireland to Southampton Eastleigh?

Accepted Answer

Aer Lingus is the most popular carrier operating from Northern Ireland to Southampton Eastleigh

Question 5

How many flights depart from Northern Ireland to Southampton on average per day?

Accepted Answer

3 flights are operational daily from Northern Ireland to Southampton as of November 2025. The most popular departure time for this route is 16:00, with 53% of flights per day taking off in the afternoon.

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

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.

Question 8

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

Accepted Answer

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

Question 9

Which airlines fly to Southampton?

Accepted Answer

British Airways, easyJet and Aer Lingus are the top three most popular airlines that fly to Southampton from Northern Ireland according to our data. British Airways is the first choice among our users, with 50% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 6 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

Question 10

How long does it take to fly to Southampton?

Accepted Answer

The average flight duration from Northern Ireland to Southampton depends on which airport you fly into and out of. Flying from Belfast to London Heathrow Airport is 1h 20m on average, while flying from Londonderry to London Heathrow Airport is 1h 30m on average. London Heathrow Airport is the most popular airport in Southampton.

Question 11

What is the cheapest month to fly to Southampton?

Accepted Answer

The month of March is, on average, the cheapest month to fly to Southampton from Northern Ireland, with most prices found around £73. 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 £90.

Question 12

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

Accepted Answer

Our data shows that Sunday is the least expensive day to fly to Southampton. Tickets to fly out on this day can be as low as £77. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around £143. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southampton.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

As of November 2025, there are 2 operators available to choose from for flights from Northern Ireland to Southampton Eastleigh Airport.

Question 15

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

Accepted Answer

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.

Question 16

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

Accepted Answer

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.

Best price found	£95
Fastest flight time	1h 15m
Direct flights	Tue, Wed, Thu, Fri, Sat and Sun
Airports in Southampton	1 airport

Airline	Rating	Free Cancellation	Price
easyJet	PriceFrom £38	Free Cancellation	Rating 6.9 1,848 reviews		Search easyJet flights
Aer Lingus	PriceFrom £73	Free Cancellation	Rating 7.2 1,382 reviews		Search Aer Lingus flights

Cheap flights from Northern Ireland to London from £60

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 18/12. 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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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?

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

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

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?

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.

What is the cheapest airline that flies from Northern Ireland to Southampton Eastleigh?

Aer Lingus is the most popular carrier operating from Northern Ireland to Southampton Eastleigh

Which airlines fly to Southampton?

How many flights depart from Northern Ireland to Southampton on average per day?

3 flights are operational daily from Northern Ireland to Southampton as of November 2025. The most popular departure time for this route is 16:00, with 53% of flights per day taking off in the afternoon.

How many flights depart from Northern Ireland to Southampton on average per week?

The number of flights available between Northern Ireland and Southampton is 26 per week as of November 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

How long does it take to fly 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

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Airports in Southampton

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

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?

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

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

Best airlines flying from Northern Ireland to Southampton

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