Cheapflights Tip: The best prices from Southampton Eastleigh to Belfast are usually found in September or May, booked 59 days in advance, depart on a Tuesday or Thursday and return on a Tuesday
Find 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 19 October 2026.
Popular in
December
Cheapest in
September
Average price
£115
Highest demand for flights based on searches. 16% potential increase in price (£17 potential increase over avg. return price).
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.
SOU-BF1
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?
Booking 54 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, September is the cheapest month in which you can book a flight from Southampton to Belfast (average of £88). Flying from Southampton to Belfast in December is currently the most expensive (average of £164). 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 19 October 2026.
One of the essential ways to save on airfare from Southampton to Belfast is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the afternoon could potentially save you up to 43% 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 19 October 2026.
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.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
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.
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 £46 on this airline. An additional option worth looking into is Aer Lingus, starting at £81. You may be able to fly from Southampton to Belfast for 61% 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 £52. While the most popular route (Southampton Eastleigh - Belfast Intl) can be booked for £48 on average, our data indicates £87 when flying 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, September is the cheapest month in which you can book a flight from Southampton to Belfast (average of £88). Flying from Southampton to Belfast in December is currently the most expensive (average of £164). 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.
Browse through other flights departing from Southampton. Flights are based on user searches made on Cheapflights and were last updated on 19 October 2026.
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 7,457,451 searches. Data last updated 19 October 2026.
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.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.