Cheap flights from Belfast-International to San Diego
Cheap return flights from Belfast-International to San Diego
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
San Diego flight facts
What you need to know
What are the cheapest airlines?
- Ryanair
- EasyJet
- British Airways
These airlines usually offer the cheapest flights from Belfast-International to San Diego.
What airlines fly indirectly?
- American Airlines
- United Airlines
- Delta Air Lines
These airlines fly from Belfast-International to San Diego, but you’ll have at least one layover.
How long is the flight?
15 hours
This is the shortest flight time from Belfast-International to San Diego.
Alternative flights from the UK to San Diego
Check out prices for other routes
Alternative flights from Belfast-International
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the Belfast-International/San Diego route. There are around 35 flights on any given week from the UK to San Diego and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from Belfast-International to San Diego
Tips and advice from our flight experts
You've searched for flights from Belfast-International to San Diego. We've found 25 flights and compared them to give you the best offers. Ryanair is, on average, the cheapest for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket for £65 from Belfast-International to San Diego on 04/06/2026 at 14:25.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines that operate the 8,500 km flight from Belfast-International to San Diego.
To find the best offers, consider booking in advance or looking for last-minute deals. The low season is typically from November to March. Ryanair is a popular choice for budget travelers, and the average flight duration is around 15 hours. After selecting an offer, fill out your information, complete the payment, and consider booking a hotel with us or using our flight + hotel service to save time and money.
Other popular destinations near San Diego
Where other people are flying to
