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.

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).

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.

What is the cheapest month to fly from San Francisco to Northern Ireland?

October is one of the best times of the year to fly to Northern Ireland from San Francisco. Prices for October average £677 per person but you can even find prices for as low as £418. The most expensive prices can be found in the month of January. Opting for a October flight can save you 48% on your journey compared to booking in January

What is the cheapest time of day to fly from SFO to NIR?

When flying from San Francisco to Northern Ireland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

£327+ Flights from San Francisco to Northern Ireland

Cheap flight deals from San Francisco to Northern Ireland

Round-trip from	£472
One-way from	£327
Popular in	January
Cheapest in	October
Average price	£874

British Airways
23/11-2/12
2 total stops
44h 45m total
San Francisco to Northern Ireland

Search Deals

7/8
3 total stops
30h 25m total
San Francisco to Northern Ireland

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£87 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 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 30 July 2025.

Sun 23/1117:30SFO - BHD

1 stop17h 10mBritish Airways

Tue 2/1219:25BHD - SFO

1 stop27h 35mBritish Airways

Deal found 29/7£472

Wed 3/1213:55SFO - BHD

1 stop18h 55mDelta

Sun 7/1206:30BHD - SFO

1 stop13h 20mDelta

Deal found 29/7£552

Wed 3/1211:05SFO - BHD

2 stops25h 55mVirgin Atlantic

Sun 7/1217:20BHD - SFO

2 stops34h 05mVirgin Atlantic

Deal found 29/7£563

Thu 31/713:45SFO - BHD

1 stop23h 20mKLM

Thu 7/806:30BHD - SFO

2 stops18h 54mKLM

Deal found 28/7£677

Mon 25/819:20SFO - BHD

1 stop16h 15mMultiple Airlines

Thu 28/807:05BHD - SFO

2 stops35h 35mMultiple Airlines

Deal found 28/7£721

Sat 22/1120:40SFO - BHD

1 stop15h 00mAer Lingus

Sun 30/1117:55BHD - SFO

2 stops29h 40mAer Lingus

Deal found 29/7£792

Thu 28/816:00SFO - BFS

1 stop17h 50mMultiple Airlines

Thu 11/909:00BFS - SFO

1 stop18h 15mMultiple Airlines

Deal found 27/7£813

Best flights from San Francisco to Northern Ireland
Discover carefully curated flight deals from San Francisco to Northern Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 July 2025.

Sun 23/1117:30SFO - BHD

1 stop17h 10mBritish Airways

Tue 2/1219:25BHD - SFO

1 stop27h 35mBritish Airways

Deal found 29/7£472

Wed 3/1213:55SFO - BHD

1 stop18h 55mDelta

Sun 7/1206:30BHD - SFO

1 stop13h 20mDelta

Deal found 29/7£552

Wed 3/1211:05SFO - BHD

2 stops25h 55mVirgin Atlantic

Sun 7/1217:20BHD - SFO

2 stops34h 05mVirgin Atlantic

Deal found 29/7£563

Mon 25/819:20SFO - BHD

1 stop16h 15mMultiple Airlines

Thu 28/807:05BHD - SFO

2 stops35h 35mMultiple Airlines

Deal found 28/7£721

Sat 22/1120:40SFO - BHD

1 stop15h 00mAer Lingus

Sun 30/1117:55BHD - SFO

2 stops29h 40mAer Lingus

Deal found 29/7£792

Thu 28/813:45SFO - BHD

1 stop23h 30mKLM

Thu 11/906:30BHD - SFO

1 stop13h 15mKLM

Deal found 28/7£806

Thu 28/816:00SFO - BFS

1 stop17h 50mMultiple Airlines

Thu 11/909:00BFS - SFO

1 stop18h 15mMultiple Airlines

Deal found 27/7£813

Last-minute flights from San Francisco to Northern Ireland
Discover last-minute flight deals from San Francisco to Northern Ireland. Data last updated 30 July 2025 and is based on user searches.

Thu 31/713:45SFO - BHD

1 stop23h 20mKLM

Thu 7/806:30BHD - SFO

2 stops18h 54mKLM

Deal found 28/7£677

Fri 1/813:45SFO - BHD

1 stop23h 30mDelta

Mon 4/806:30BHD - SFO

2 stops20h 16mDelta

Deal found 29/7£676

Mon 25/819:20SFO - BHD

1 stop16h 15mMultiple Airlines

Thu 28/807:05BHD - SFO

2 stops35h 35mMultiple Airlines

Deal found 28/7£721

Mon 25/817:40SFO - BHD

2 stops18h 15mAer Lingus

Thu 28/818:50BHD - SFO

2 stops29h 00mAer Lingus

Deal found 28/7£936

Thu 28/806:28SFO - BHD

2 stops18h 52mBritish Airways

Thu 11/909:35BHD - SFO

2 stops20h 11mBritish Airways

Deal found 28/7£661

Thu 28/816:00SFO - BFS

1 stop17h 50mMultiple Airlines

Thu 11/909:00BFS - SFO

1 stop18h 15mMultiple Airlines

Deal found 27/7£813

One-way flights from San Francisco to Northern Ireland
Search for one-way flight options from San Francisco to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 30 July 2025.

Thu 7/819:25SFO - BHD

3 stops30h 25mMultiple Airlines

Deal found 29/7£327

Thu 7/811:20SFO - BFS

2 stops37h 40mMultiple Airlines

Deal found 29/7£333

Thu 7/813:45SFO - BHD

1 stop23h 20mKLM

Deal found 29/7£347

Fri 12/911:35SFO - BHD

2 stops19h 55mAmerican Airlines

Deal found 29/7£1,101

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 23/11

17:30-18:40

1 stop17h 10m

Belfast City

Tue 2/12

19:25-15:00

1 stop27h 35m

£472

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 3/12

13:55-16:50

1 stop18h 55m

Belfast City

Sun 7/12

06:30-11:50

1 stop13h 20m

£552

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 3/12

11:05-21:00

2 stops25h 55m

Belfast City

Sun 7/12

17:20-19:25

2 stops34h 05m

£563

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 25/8

19:20-19:35

1 stop16h 15m

Belfast City

Thu 28/8

07:05-10:40

2 stops35h 35m

£721

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sat 22/11

20:40-19:40

1 stop15h 00m

Belfast City

Sun 30/11

17:55-15:35

2 stops29h 40m

£792

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 28/8

13:45-21:15

1 stop23h 30m

Belfast City

Thu 11/9

06:30-11:45

1 stop13h 15m

£806

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 28/8

16:00-17:50

1 stop17h 50m

Belfast Intl

Thu 11/9

09:00-19:15

1 stop18h 15m

£813

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 7/8

19:25-09:50

3 stops30h 25m

£327

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 7/8

11:20-09:00

2 stops37h 40m

£333

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 7/8

13:45-21:05

1 stop23h 20m

£347

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Showing 1-10 of 11 results

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.

Reviews of airlines servicing Northern Ireland

See what other customers who have flown with Delta, KLM, andVirgin Atlantic from San Francisco to Northern Ireland have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,977 reviews

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,383 reviews

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

655 reviews

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus

7.1

Good

1,190 reviews

Delta

8.0

Very Good

7,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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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Fly with Cheapflights

How does Cheapflights help users find flights from San Francisco to Northern Ireland?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Northern Ireland from San Francisco today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Northern Ireland?

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Northern Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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.

Can Cheapflights notify me if prices for flights from San Francisco to Northern Ireland become cheaper?

Of course! You can now track prices for flights from San Francisco to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from San Francisco to Northern Ireland from £327

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/8. Fares are subject to change and may not be available on all flights or dates of travel.

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 30 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from San Francisco to Northern Ireland

Cheapest flights from San Francisco to Northern IrelandExplore 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 30 July 2025.

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 30 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

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.

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?

Reviews of airlines servicing Northern Ireland

See what other customers who have flown with Delta, KLM, andVirgin Atlantic from San Francisco to Northern Ireland have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

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 San Francisco to Northern Ireland?

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Northern Ireland?

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

Can Cheapflights notify me if prices for flights from San Francisco to Northern Ireland become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 30 July 2025.