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

Currently, February is the cheapest month in which you can book a flight from Northern Ireland to San Francisco (average of £538). Flying from Northern Ireland to San Francisco in July is currently the most expensive (average of £803). 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.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

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

April is one of the best times of the year to fly to San Francisco from Northern Ireland. Prices for April average £555 per person but you can even find prices for as low as £391. The most expensive prices can be found in the month of December. Opting for a April flight can save you 32% on your journey compared to booking in December

What airport do you fly into for flights to San Francisco from Northern Ireland?

For a flight from Northern Ireland to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city.

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

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

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

Yes. Cheapflights offers flight deals from Northern Ireland to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£575+ Flights from Northern Ireland to San Francisco

Cheap flight deals from Northern Ireland to San Francisco

Round-trip from	£575
Popular in	December
Cheapest in	April
Average price	£720

Delta
20/8-5/9
4 total stops
40h 07m total
Northern Ireland to San Francisco

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£10 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Northern Ireland to San Francisco

Cheapest flights from Northern Ireland to San Francisco
Explore the most affordable flight options available from Northern Ireland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.

Wed 20/806:30BHD - SFO

2 stops18h 47mDelta

Fri 5/911:35SFO - BHD

2 stops21h 20mDelta

Deal found 12/7£575

Wed 20/806:50BHD - SFO

1 stop15h 00mIberia

Fri 5/913:21SFO - BHD

2 stops18h 09mIberia

Deal found 11/7£639

Wed 20/817:25BHD - SFO

1 stop26h 20mMultiple Airlines

Fri 5/915:05SFO - BHD

2 stops17h 50mMultiple Airlines

Deal found 10/7£668

Tue 23/1217:20BHD - SFO

1 stop26h 30mKLM

Tue 13/113:55SFO - BHD

1 stop18h 55mKLM

Deal found 11/7£722

Mon 22/1209:10BHD - SFO

1 stop13h 50mAmerican Airlines

Tue 13/113:22SFO - BHD

2 stops17h 33mAmerican Airlines

Deal found 11/7£726

Mon 22/1206:30BHD - SFO

2 stops25h 04mVirgin Atlantic

Tue 13/111:35SFO - BHD

2 stops21h 15mVirgin Atlantic

Deal found 11/7£728

Mon 22/1209:15BHD - SFO

1 stop13h 45mBritish Airways

Mon 12/117:30SFO - BHD

1 stop14h 35mBritish Airways

Deal found 11/7£920

Best flights from Northern Ireland to San Francisco
Discover carefully curated flight deals from Northern Ireland to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 July 2025.

Wed 20/806:30BHD - SFO

2 stops18h 47mDelta

Fri 5/911:35SFO - BHD

2 stops21h 20mDelta

Deal found 12/7£575

Wed 20/806:50BHD - SFO

1 stop15h 00mIberia

Fri 5/913:21SFO - BHD

2 stops18h 09mIberia

Deal found 11/7£639

Wed 20/817:25BHD - SFO

1 stop26h 20mMultiple Airlines

Fri 5/915:05SFO - BHD

2 stops17h 50mMultiple Airlines

Deal found 10/7£668

Tue 23/1217:20BHD - SFO

1 stop26h 30mKLM

Tue 13/111:30SFO - BHD

2 stops21h 20mKLM

Deal found 11/7£722

Mon 22/1209:10BHD - SFO

1 stop13h 50mAmerican Airlines

Tue 13/113:22SFO - BHD

2 stops17h 33mAmerican Airlines

Deal found 11/7£726

Mon 22/1206:30BHD - SFO

2 stops25h 04mVirgin Atlantic

Tue 13/111:35SFO - BHD

2 stops21h 15mVirgin Atlantic

Deal found 11/7£728

Mon 22/1209:15BHD - SFO

1 stop13h 45mBritish Airways

Mon 12/117:30SFO - BHD

1 stop14h 35mBritish Airways

Deal found 11/7£920

Last-minute flights from Northern Ireland to San Francisco
Discover last-minute flight deals from Northern Ireland to San Francisco. Data last updated 13 July 2025 and is based on user searches.

Wed 20/806:30BHD - SFO

2 stops18h 47mDelta

Fri 5/911:35SFO - BHD

2 stops21h 20mDelta

Deal found 12/7£575

Wed 20/806:50BHD - SFO

1 stop15h 00mIberia

Fri 5/913:21SFO - BHD

2 stops18h 09mIberia

Deal found 11/7£639

Wed 20/817:25BHD - SFO

1 stop26h 20mMultiple Airlines

Fri 5/915:05SFO - BHD

2 stops17h 50mMultiple Airlines

Deal found 10/7£668

Wed 20/817:25BHD - SFO

1 stop26h 20mKLM

Fri 5/913:45SFO - BHD

1 stop23h 30mKLM

Deal found 11/7£757

One-way flights from Northern Ireland to San Francisco
Search for one-way flight options from Northern Ireland to San Francisco. Find affordable one-way fares based on user searches. Data last updated 13 July 2025.

Mon 21/709:05BHD - SFO

3 stops39h 25mMultiple Airlines

Deal found 10/7£696

Mon 21/721:35BFS - SFO

2 stops33h 02mMultiple Airlines

Deal found 11/7£903

Mon 21/718:45BHD - SFO

2 stops27h 05mBritish Airways

Deal found 10/7£1,073

Mon 21/717:25BHD - SFO

1 stop26h 20mKLM

Deal found 10/7£1,400

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

06:30-17:17

2 stops18h 47m

San Francisco

Fri 5/9

11:35-16:55

2 stops21h 20m

£575

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

06:50-13:50

1 stop15h 00m

San Francisco

Fri 5/9

13:21-15:30

2 stops18h 09m

£639

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

17:25-11:45

1 stop26h 20m

San Francisco

Fri 5/9

15:05-16:55

2 stops17h 50m

£668

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 23/12

17:20-11:50

1 stop26h 30m

San Francisco

Tue 13/1

11:30-16:50

2 stops21h 20m

£722

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 22/12

09:10-15:00

1 stop13h 50m

San Francisco

Tue 13/1

13:22-14:55

2 stops17h 33m

£726

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 22/12

06:30-23:34

2 stops25h 04m

San Francisco

Tue 13/1

11:35-16:50

2 stops21h 15m

£728

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 22/12

09:15-15:00

1 stop13h 45m

San Francisco

Mon 12/1

17:30-16:05

1 stop14h 35m

£920

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 21/7

09:05-16:30

3 stops39h 25m

£696

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 21/7

21:35-22:37

2 stops33h 02m

£903

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 21/7

18:45-13:50

2 stops27h 05m

£1,073

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 11 results

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

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Northern Ireland 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 Northern Ireland to San Francisco

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to San Francisco as you normally would.

Reviews of airlines servicing San Francisco

Check out reviews from past customers who have flown with Delta, KLM, andVirgin Atlantic from Northern Ireland to San Francisco to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,951 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,372 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.4

Good

654 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Iberia

7.0

Good

2,832 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to San Francisco from Northern Ireland?
For a flight from Northern Ireland to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city.
Can I find deals for flights from Northern Ireland to San Francisco that include hotel bookings?
Yes. In addition to deals on Northern Ireland to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Northern Ireland to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to San Francisco.
Can I find deals for business class flights from Northern Ireland to San Francisco?
Yes. Cheapflights offers flight deals from Northern Ireland to San Francisco 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 Northern Ireland to San Francisco?
Currently, February is the cheapest month in which you can book a flight from Northern Ireland to San Francisco (average of £538). Flying from Northern Ireland to San Francisco in July is currently the most expensive (average of £803). 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

Santa Cruz

Vallejo

Newark

South San Francisco

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Union City

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Northern Ireland to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£405	Average£575	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£470	Average£520	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

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

When you search for this flight from Northern Ireland to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from Northern Ireland.

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

Certainly. Search results for flights to San Francisco from Northern Ireland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Northern Ireland to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Northern Ireland to San Francisco from £575

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Northern Ireland to San Francisco

Keep the following information in mind while searching for Northern Ireland to San Francisco flight deals. Data was last updated 13 July 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Northern Ireland to San Francisco

Cheapest flights from Northern Ireland to San FranciscoExplore the most affordable flight options available from Northern Ireland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.

Explore the most affordable flight options available from Northern Ireland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

Everything you need to know about your flight from Northern Ireland to San Francisco

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

Find hourly flight availability from Northern Ireland to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 July 2025.

Reviews of airlines servicing San Francisco

Related info for your journey

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

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

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

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

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

Travelling to a place near 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 Northern Ireland to San Francisco

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

Top 2 airlines flying from Northern Ireland to San Francisco

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 Northern Ireland to San Francisco?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Northern Ireland to San Francisco
Explore the most affordable flight options available from Northern Ireland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.