Question 1

What is the cheapest airline to fly from Southampton to Belfast Intl Airport round-trip?

Accepted Answer

Cheapflights users have booked flights from Southampton to Belfast Intl Airport round-trip from £97.

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Southampton to Belfast Intl Airport (average of £67). Flying from Southampton to Belfast Intl Airport in July is currently the most expensive (average of £90). 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.

Question 4

What is the cheapest day to fly from Southampton to Belfast Intl Airport?

Accepted Answer

Travellers seeking maximum savings on their Southampton to Belfast Intl Airport flight should consider departing on Sunday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 5

E

Accepted Answer

In terms of precipitation, rainfall in Belfast Intl Airport ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast Intl Airport when rainfall is around 50.0 mm.

Question 6

E

Accepted Answer

If weather is an important factor for your trip to Belfast Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Question 7

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

Accepted Answer

The cheapest flight price from Southampton to Belfast Intl Airport is £18. On average you can expect to pay £89. The most popular route, (Southampton Eastleigh - Belfast Intl), can usually be booked for £47.

Question 8

What is the cheapest day to fly round-trip from Southampton to Belfast Intl Airport?

Accepted Answer

Travelers have found that booking a Tuesday departure is the best way to save up to 61% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Question 9

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

Accepted Answer

Users have found that booking a flight from Southampton to Belfast Intl Airport at least 44 days early can save you up to 171% on average compared to booking a flight this week. If booking 44 days before your flight isn’t an option for you, users have found flights from Southampton to Belfast Intl Airport for as little as £63 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £108 for flights departing within the next 3 days.

Question 10

What is the cheapest month to fly from Southampton to Belfast Intl Airport?

Accepted Answer

January is one of the best times of the year to fly to Belfast Intl Airport from Southampton. Prices for January average £62 per person but you can even find prices for as low as £26. The most expensive prices can be found in the month of July. Opting for a January flight can save you 45% on your journey compared to booking in July

Question 11

What is the cheapest time of day to fly from SOU to BFS?

Accepted Answer

One of the essential ways to save on airfare from Southampton to Belfast Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.

Question 12

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

Accepted Answer

If you book a flight to Belfast Intl from Southampton, you will be flying from Eastleigh, which is the city’s only airport. Southampton Eastleigh (SOU) is located 3.5 mi from the center of Southampton. There are 0 flights from Eastleigh to Belfast Intl per day from 2 different airlines.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

Yes. Cheapflights offers flight deals from Southampton to Belfast Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 16

How does Cheapflights help users find flights from Southampton to Belfast Intl?

Accepted Answer

Cheapflights makes it easy to find Southampton to Belfast Intl 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.

Question 17

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

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Southampton to Belfast Intl for you. Better yet — we are completely free to use.

Question 18

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

Accepted Answer

Need flexible booking options for your flight to Belfast Intl from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 19

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

Accepted Answer

Of course! You can now track prices for flights from Southampton to Belfast Intl 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.

Round-trip from	£97
One-way from	£33
Popular in	December
Cheapest in	September
Average price	£84
Good round-trip deal	£66 or less
Good one-way deal	£40 or less

Airline	Cheapest	Average	Flexibility	On-time
easyJet	Cheapest£33	Average£66	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
Aer Lingus	Cheapest£53	Average£94	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from Southampton to Belfast Intl Airport from £33

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheap flight deals from Southampton to Belfast Intl

Round-trip from

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Find flight deals from Southampton to Belfast Intl

Cheapest flights from Southampton to Belfast IntlExplore the most affordable flight options available from Southampton to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Explore the most affordable flight options available from Southampton to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Southampton to Belfast Intl Airport that are best for you.

Best time to book a flight from Southampton to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Southampton with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Southampton to Belfast Intl Airport

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

Use this chart to determine the optimal time to book a return flight from Southampton to Belfast Intl. Price data was last updated on 27 June 2025.

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

What is the cheapest time of day to fly from SOU to BFS?

Find hourly flight availability from Southampton to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 July 2025.

Reviews of airlines servicing Belfast Intl

Read through reviews of airlines operating flights from Southampton to Belfast Intl Airport, such as easyJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from Southampton to Belfast Intl Airport round-trip?

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

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

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

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

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

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Alternative routes for Southampton to Belfast Intl

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Top 2 airlines flying from Southampton to Belfast Intl

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How does Cheapflights help users find flights from Southampton to Belfast Intl?

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

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

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

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Cheapest flights from Southampton to Belfast Intl
Explore the most affordable flight options available from Southampton to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.