HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Northern Ireland

$342+ Cheap flights from San Francisco (SFO) to Northern Ireland

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Francisco to Northern Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 3, 2025.

This KLM deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:00 pmSFO - BHD
2 stops18h 50mKLM
Fri 12/125:20 pmBHD - SFO
1 stop26h 30mKLM
Deal found 12/1$717
This oojo deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:30 pmSFO - BHD
1 stop30h 55mBritish Airways
Fri 12/127:35 pmBHD - SFO
1 stop27h 25mBritish Airways
Deal found 12/2$812
This Expedia deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:20 pmSFO - BHD
2 stops34h 55mMultiple Airlines
Mon 1/57:25 pmBHD - SFO
2 stops52h 10mMultiple Airlines
Deal found 12/1$1,176
This oojo deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:30 pmSFO - BHD
1 stop17h 05mBritish Airways
Mon 1/57:25 pmBHD - SFO
2 stops33h 23mBritish Airways
Deal found 12/1$1,181
This Delta deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:55 pmSFO - BHD
1 stop18h 55mDelta
Mon 1/55:20 pmBHD - SFO
1 stop26h 30mDelta
Deal found 12/1$1,303
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:55 pmSFO - BFS
1 stop17h 45mMultiple Airlines
Mon 1/58:50 pmBFS - SFO
2 stops35h 09mMultiple Airlines
Deal found 12/1$1,503
This oojo deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:20 pmSFO - BHD
2 stops16h 00mBritish Airways
Tue 12/307:25 pmBHD - SFO
2 stops36h 41mBritish Airways
Deal found 12/2$1,688
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:20 pmSFO - BFS
2 stops14h 40mMultiple Airlines
Tue 12/306:30 amBFS - SFO
2 stops21h 05mMultiple Airlines
Deal found 12/2$1,817
This Mytrip deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:30 amSFO - BFS
3 stops21h 40mMultiple Airlines
Sun 12/2810:20 pmBFS - SFO
2 stops26h 10mMultiple Airlines
Deal found 12/1$2,287
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:20 pmSFO - BFS
2 stops20h 20mMultiple Airlines
Sat 1/36:00 amBFS - SFO
2 stops18h 30mMultiple Airlines
Deal found 12/2$2,719

Find 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 December 3, 2025.

Round-trip from

$599
(oojo)

One-way from

$342
(Mytrip)

Popular in

June

Cheapest in

April

Average price

$1,136
From San Francisco to Northern Ireland
Search Deals
One-way flight from San Francisco to Northern Ireland
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated December 3, 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

Fri 2/6

5:30 pm-5:15 pm

1 stop15h 45m

Belfast City

Fri 2/20

6:45 am-3:00 pm

1 stop16h 15m

$599

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 2/11

5:30 pm-4:35 pm

1 stop15h 05m

Belfast City

Sun 2/15

6:30 am-3:00 pm

1 stop16h 30m

$622

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 5/20

4:35 pm-8:45 am

1 stop32h 10m

Belfast City

Thu 5/28

4:20 pm-1:50 pm

1 stop29h 30m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 5/20

4:35 pm-8:45 am

1 stop32h 10m

Belfast City

Wed 5/27

6:15 pm-1:50 pm

1 stop27h 35m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 5/20

4:35 pm-8:45 am

1 stop32h 10m

Belfast City

Fri 5/29

6:35 am-1:50 pm

1 stop15h 15m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 5/20

4:35 pm-8:45 am

1 stop32h 10m

Belfast City

Mon 5/25

1:50 pm-1:50 pm

1 stop32h 00m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 5/20

4:35 pm-8:45 am

1 stop32h 10m

Belfast City

Tue 5/26

6:15 pm-1:50 pm

1 stop27h 35m

$659

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 2/11

1:55 pm-4:50 pm

1 stop18h 55m

Belfast City

Sun 2/15

5:20 pm-9:48 pm

2 stops36h 28m

$691

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 1/15

7:25 pm-11:45 pm

2 stops20h 20m

Belfast Intl

Thu 1/22

8:25 am-10:54 am

3 stops34h 29m

$757

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 1/17

11:20 am-7:55 pm

3 stops24h 35m

Belfast Intl

Sat 1/24

11:10 pm-2:35 pm

3 stops47h 25m

$842

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 17 results
1
2

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 round-trip 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, April is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $587). Flying from San Francisco to Northern Ireland in November is currently the most expensive (average of $1,032). 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.

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

Find hourly flight availability from San Francisco to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 3, 2025.

It’s typically best to fly out from San Francisco to Northern Ireland at noon. Doing so could potentially save you 29% on the flight price compared to flying in the morning, which is usually more expensive.

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 December 3, 2025.
Get a feel of what it's like to fly with British Airways from San Francisco to Northern Ireland by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,557 reviews

Food

6.4

Boarding

6.9

Crew

7.6

Comfort

6.7

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,557 reviews
British Airways
6.7
Okay
7,557 reviews

Food

6.4

Boarding

6.9

Crew

7.6

Comfort

6.7

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Northern Ireland. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

  • How long is the flight from San Francisco to Northern Ireland?

    There are many flights that can get you from San Francisco to Northern Ireland in 15h 45m. Fly via British Airways to get the fastest option. There are 5038 mi between San Francisco and Northern Ireland.

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

    The most popular flight routes from San Francisco to Northern Ireland are San Francisco - Belfast Intl, San Francisco - Belfast City and San Francisco - Campbeltown Machrihanish.

  • 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 vacation 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, April is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $587). Flying from San Francisco to Northern Ireland in November is currently the most expensive (average of $1,032). 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

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.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Gatwick flights
San Francisco to Gatwick flights
Los Angeles to London City flights
San Francisco to London City flights
Los Angeles to Stansted flights
San Diego to Heathrow flights
San Francisco to Stansted flights
Ontario to Heathrow flights
Los Angeles to Luton flights
San Francisco to Luton flights
Las Vegas to Heathrow flights
Santa Ana to Heathrow flights
San Diego to Gatwick flights
San Jose to Heathrow flights
Los Angeles to Edinburgh flights
Las Vegas to Gatwick flights
San Francisco to Edinburgh flights
San Diego to London City flights
Sacramento to Heathrow flights
Las Vegas to London City flights
San Francisco to Glasgow Intl flights
Los Angeles to Glasgow Intl flights
San Diego to Stansted flights
Los Angeles to Manchester flights
Oakland to Heathrow flights
Santa Ana to Edinburgh flights
San Francisco to Southampton flights
Las Vegas to Edinburgh flights
Sacramento to Gatwick flights
Ontario to Edinburgh flights
San Jose to Gatwick flights
Santa Ana to Glasgow Intl flights
Reno to Heathrow flights
Las Vegas to Stansted flights
San Jose to Edinburgh flights
Ontario to Gatwick flights
Fresno to Heathrow flights
San Francisco to Manchester flights
Palm Springs to Heathrow flights
Oakland to Gatwick flights
Santa Ana to Manchester flights
Sacramento to London City flights
Burbank to Heathrow flights
Ontario to Manchester flights
Santa Ana to Gatwick flights
Santa Rosa to Heathrow flights
Los Angeles to Birmingham flights
Los Angeles to Southampton flights

Top airline flying from San Francisco to Northern Ireland

Discover the top airline that operate flights from San Francisco to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$621Average$767FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.