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Cheap flights from San Francisco to Northern Ireland from £504

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
23 Apr — 30 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 18 April 2025.

Round-trip from

£525

Popular in

January

Cheapest in

October

Average price

£507
British Airways
  • British Airways
  • 8/9-22/9
  • 2 total stops
  • 42h 25m total
  • San Francisco to Northern Ireland
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£82 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 18 April 2025.

Sun 20/416:20SFO - BHD
1 stop14h 20mAmerican Airlines
Tue 6/506:35BHD - SFO
1 stop15h 15mAmerican Airlines
Deal found 17/4£504
Mon 8/916:35SFO - BHD
1 stop15h 05mBritish Airways
Thu 25/906:35BHD - SFO
1 stop15h 15mBritish Airways
Deal found 17/4£525
Sun 20/419:30SFO - BFS
2 stops18h 50mMultiple Airlines
Tue 6/522:55BFS - SFO
3 stops47h 35mMultiple Airlines
Deal found 17/4£694
Wed 10/917:45SFO - BHD
2 stops19h 10mAer Lingus
Wed 24/918:00BHD - SFO
2 stops29h 55mAer Lingus
Deal found 17/4£763
Sun 20/408:20SFO - BHD
2 stops21h 20mMultiple Airlines
Tue 6/506:55BHD - SFO
3 stops22h 30mMultiple Airlines
Deal found 17/4£840

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 18 April 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

Mon 8/9

19:20-20:45

1 stop17h 25m

Belfast City

Wed 24/9

06:50-13:50

1 stop15h 00m

£525

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 8/7

16:35-15:20

1 stop14h 45m

Belfast City

Thu 7/8

06:35-18:34

2 stops19h 59m

£711

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/9

17:45-20:55

2 stops19h 10m

Belfast City

Wed 24/9

18:00-15:55

2 stops29h 55m

£763

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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 18 April 2025.
American Airlines
7.2
Good
10,000 reviews
Check prices

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.5

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

LAX - ORD

The seats are just SO UNCOMFORTABLE it completely ruins the experience, especially on a redeye. I was so exhausted but couldn’t sleep a wink because it was just so incredibly uncomfortable. I don’t know who designs airplane seats, but they’re curved forward, forcing your body into a slouching position. Please. Please please get new seats. Also ones that actually extent to the bulkhead so that when you try to lean against the wall, you don’t just fall through the gap
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.5

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

LAX - ORD

The seats are just SO UNCOMFORTABLE it completely ruins the experience, especially on a redeye. I was so exhausted but couldn’t sleep a wink because it was just so incredibly uncomfortable. I don’t know who designs airplane seats, but they’re curved forward, forcing your body into a slouching position. Please. Please please get new seats. Also ones that actually extent to the bulkhead so that when you try to lean against the wall, you don’t just fall through the gap
Aer Lingus
7.0
Good
1,063 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.5

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

LAX - ORD

The seats are just SO UNCOMFORTABLE it completely ruins the experience, especially on a redeye. I was so exhausted but couldn’t sleep a wink because it was just so incredibly uncomfortable. I don’t know who designs airplane seats, but they’re curved forward, forcing your body into a slouching position. Please. Please please get new seats. Also ones that actually extent to the bulkhead so that when you try to lean against the wall, you don’t just fall through the gap
British Airways
6.6
Okay
6,771 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.5

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

LAX - ORD

The seats are just SO UNCOMFORTABLE it completely ruins the experience, especially on a redeye. I was so exhausted but couldn’t sleep a wink because it was just so incredibly uncomfortable. I don’t know who designs airplane seats, but they’re curved forward, forcing your body into a slouching position. Please. Please please get new seats. Also ones that actually extent to the bulkhead so that when you try to lean against the wall, you don’t just fall through the gap

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

Browse thousands of different options on Cheapflights for your next trip

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