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Cheap flights from San Francisco to Northern Ireland from £511

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
3 Apr — 10 Apr1
1 adult

Cheap flight deals from San Francisco to Northern Ireland

Keep the following information in mind while searching for San Francisco to Northern Ireland flight deals. Data was last updated 29 March 2025.

Round-trip from

£511

Popular in

January

Cheapest in

October

Average price

£545
British Airways
  • British Airways
  • 8/4-15/4
  • 2 total stops
  • 30h 15m total
  • San Francisco to Northern Ireland
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£90 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from San Francisco to Northern Ireland

Cheapest flights from San Francisco to Northern Ireland
Explore the most affordable flight options available from San Francisco to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 March 2025.

Tue 1/419:30SFO - BHD
1 stop14h 00mBritish Airways
Tue 8/420:20BHD - SFO
1 stop25h 30mBritish Airways
Deal found 28/3£511
Tue 1/414:40SFO - BFS
2 stops24h 05mMultiple Airlines
Tue 8/405:55BFS - SFO
2 stops17h 36mMultiple Airlines
Deal found 28/3£851
Fri 4/408:35SFO - BHD
2 stops22h 55mMultiple Airlines
Fri 11/406:55BHD - SFO
3 stops24h 53mMultiple Airlines
Deal found 29/3£1,117

Cheapflights Fare Finder

Customise your flight search to find flights from San Francisco to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 29 March 2025.
Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

Fly from

San Francisco

Fly to

Northern Ireland

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 8/4

16:20-15:20

1 stop15h 00m

Belfast City

Tue 15/4

06:35-13:50

1 stop15h 15m

£511

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Best time to book a flight from San Francisco to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from San Francisco with our price prediction graph.
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 San Francisco to Northern Ireland

What is the cheapest month to book a flight from San Francisco to Northern Ireland?

Currently, January is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of £67). Flying from San Francisco to Northern Ireland 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.

Rainfall in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Northern Ireland 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 Northern Ireland when rainfall is around 50.0 mm.

Temperature in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Northern Ireland, 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).

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. 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 Northern Ireland. Reviews last updated 29 March 2025.
Iberia
7.0
Good
2,653 reviews
Check prices

Food

6.3

Boarding

7.1

Comfort

6.7

Crew

7.6

Entertainment

6.6

Overall

7.0

Reviews

1 / 20
10.0
Excellent

Maxim,Feb 2025

BOS - MAD

All Iberia staff with whom we interacted, including the flight crew, were helpful, kind, and professional. The plane looked practically new and was very clean. The seats were comfortable, and there was a lot of legroom in our emergency row seats. Our vegan dinner was quite good (rice with vegetables and grilled tofu, a fresh salad, and fresh fruit), but the breakfast snack seemed unappealing. Overall, this flight from Boston to Madrid was a great value.
Iberia
7.0
Good
2,653 reviews
Iberia
7.0
Good
2,653 reviews
Check prices

Food

6.3

Boarding

7.1

Comfort

6.7

Crew

7.6

Entertainment

6.6

Overall

7.0

Reviews

1 / 20
10.0
Excellent

Maxim,Feb 2025

BOS - MAD

All Iberia staff with whom we interacted, including the flight crew, were helpful, kind, and professional. The plane looked practically new and was very clean. The seats were comfortable, and there was a lot of legroom in our emergency row seats. Our vegan dinner was quite good (rice with vegetables and grilled tofu, a fresh salad, and fresh fruit), but the breakfast snack seemed unappealing. Overall, this flight from Boston to Madrid was a great value.
British Airways
6.6
Okay
6,713 reviews
Iberia
7.0
Good
2,653 reviews
Check prices

Food

6.3

Boarding

7.1

Comfort

6.7

Crew

7.6

Entertainment

6.6

Overall

7.0

Reviews

1 / 20
10.0
Excellent

Maxim,Feb 2025

BOS - MAD

All Iberia staff with whom we interacted, including the flight crew, were helpful, kind, and professional. The plane looked practically new and was very clean. The seats were comfortable, and there was a lot of legroom in our emergency row seats. Our vegan dinner was quite good (rice with vegetables and grilled tofu, a fresh salad, and fresh fruit), but the breakfast snack seemed unappealing. Overall, this flight from Boston to Madrid was a great value.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Northern Ireland. 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 San Francisco to Northern Ireland?

    San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Northern Ireland.

  • What are the most popular routes from San Francisco to Northern Ireland?

    When deciding which route to take from San Francisco to Northern Ireland consider San Francisco - Belfast Intl, San Francisco - Belfast City or San Francisco - Campbeltown Machrihanish as they are the most popular.

  • Can I find deals for flights from San Francisco to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on San Francisco to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Northern Ireland.

  • Can I find deals for business class flights from San Francisco to Northern Ireland?

    Yes. Cheapflights offers flight deals from San Francisco to Northern Ireland 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 San Francisco to Northern Ireland?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of £67). Flying from San Francisco to Northern Ireland 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.

See more FAQs

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Can Cheapflights find flights from San Francisco to Northern Ireland with no change fees?

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

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