Cheap Flights from Belfast to San Diego

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Compare Belfast to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

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Flight deals from Belfast to San Diego

Looking for a cheap last-minute deal or the best return flight from Belfast to San Diego? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Belfast to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Belfast to San Diego flights are currently cheapest in April.

Alternative Belfast to San Diego routes

Looking for the cheapest, fastest or easiest route from Belfast to San Diego? You could fly into the following airports instead.

Belfast to San Diego: Flight information

The things to know before you go.
Cheapest flight found689 €
Cheapest month to flyMarch

Finding cheap flights from Belfast to San Diego: Frequently asked questions

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from Belfast to San Diego is 689 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Belfast to San Diego. But we found flights with one or more stops from 689 €.
As of March 2025, there are no flights flying from Belfast to San Diego.
The cheapest month to fly from Belfast to San Diego is usually March 2025.
If you're flying from Belfast, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from 689 €.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Belfast to San Diego on Wednesday, 26 March 2025.
No airlines currently offer direct flights between Belfast and San Diego. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 14°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
The cheapest airline that flies to San Diego is Delta .

Flying from Belfast to San Diego: what you need to know

  • There are a couple of main airports you can start your trip from in Belfast. Check out your options departing from Belfast International Airport (BFS) or George Best Belfast City Airport (BHD) when booking your flight from Belfast to San Diego.

  • Disembark at San Diego's major arrival point, San Diego International Airport (SAN).

  • To ensure you catch your flight from Belfast to San Diego, leave enough time to navigate the airport and find your gate. Arriving two hours before international departures and one hour before domestic flights is the general travel rule.

  • Travelling during a peak period like public or school holidays? Expect longer queues at check-in and security. To play it safe, arrive up to four hours before international flights and two hours before domestic departures.

  • You'll need an ETA for United States if you hold a passport from United Kingdom and are visiting for tourism purposes. Travel documentation and visa requirements can be subject to change. So before booking your cheap flights from Belfast to San Diego, check with your airline and your destination country's local embassy or consulate for the most up-to-date information.

Flying from Belfast

Belfast International Airport (BFS)

  • Stopovers offer the perfect opportunity to visit a new city or just have a break during your travels. When looking for a flight from Belfast to San Diego, deselect 'Direct flights only' to check out all potential stops. Charles de Gaulle Airport (CDG) is one option if you're flying out of Belfast International Airport.

  • The journey from central Belfast to BFS takes around 2 hours and 2 minutes on public transport. If you ride-share, drive or get a cab, you'll cover the 32 kilometres in 31 minutes or so, depending on traffic conditions.

  • Searching for a handy hotel near Belfast International Airport? If you're catching an early flight from Belfast to San Diego, these stays will have you moments from check-in:

George Best Belfast City Airport (BHD)

  • Take some time to recharge during your flight from Belfast to San Diego with a stopover. London Heathrow Airport (LHR) is one of the main options between George Best Belfast City Airport and San Diego.

  • With public transport, you can travel from central Belfast to BHD in about 22 minutes. The terminal is roughly 8 kilometres away, and making the trip by car takes approximately 12 minutes.

  • Want to spoil yourself with an extra night away before boarding your flight from Belfast to San Diego? Kick back in a hotel near George Best Belfast City Airport before your break officially starts. Check out these accommodation options:

Arriving in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) is around 5 kilometres from central San Diego. With your own car rental or if you take a cab, the drive is about 9 minutes.

  • Travelling on public transport typically takes 20 minutes.

  • The last thing you need is a lengthy journey to your hotel if you're arriving on a late flight from Belfast to San Diego. Stay at one of these accommodation options near SAN instead:

McClellan-Palomar Airport (CLD)

How to find the cheapest flights from Belfast to San Diego

  • The lowest price we've seen for a one-way ticket from Belfast to San Diego is 401 €. For a return flight on this route, the best price is 689 €. Depending on the availability when you book, these fares may change.

  • It's usually best to book early if you want to find cheap tickets from Belfast to San Diego. That's because airlines change prices based on demand, which tends to increase closer to the date of departure.

  • If you can be flexible with your travel dates, try using the 'Whole month' tool. It'll give you the cheapest price across each month when searching for a ticket from Belfast to San Diego.

  • Create a Price Alert for cheap tickets from Belfast to San Diego. You don't need to search every day to see if fares have dropped. We'll update you when the price changes.

  • Use filters to tailor your flights from Belfast to San Diego. Simply select your ideal arrival and departure times, airlines and number of stops. Alternatively, sort your results by 'Cheapest' to find the best deals.

Best time to go to San Diego

  • It's time to figure out your dates for your flight from Belfast to San Diego. July is the most popular month to travel to San Diego. If you like a more low-key vibe, go in May.

  • Before locking in your flight from Belfast to San Diego, think about the kind of weather you enjoy. August is the warmest month in San Diego, with temperatures ranging from 17ºC to 28ºC.

  • If you want to travel in cooler conditions, book a cheap ticket from Belfast to San Diego in February when temperatures average between 7ºC and 23ºC.

More about San Diego

Complete your San Diego trip with a car rental

  • Finding you a cheap flight from Belfast to San Diego isn't the only trick up our sleeve. Check out our car rentals in San Diego and travel at your own pace. We search for deals from trusted car rental companies and put them all in one place. You can instantly compare offers and then book with no fees.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.