HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Northern Ireland

$304+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
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

Keep the following information in mind while searching for San Francisco to Northern Ireland flight deals. Data was last updated August 7, 2025.

Round-trip from

$694
(Mytrip)

One-way from

$304
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$678
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. 15% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 7, 2025.

This British Airways deal was found by Cheapflights users on 8/6. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:30 pmSFO - BHD
1 stop15h 05mBritish Airways
Sun 12/75:35 pmBHD - SFO
1 stop29h 25mBritish Airways
Deal found 8/6$658
This Mytrip deal was found by Cheapflights users on 8/6. 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.
Mon 9/224:20 pmSFO - BFS
3 stops22h 40mMultiple Airlines
Wed 9/248:20 amBFS - SFO
3 stops38h 10mMultiple Airlines
Deal found 8/6$694
This Ovago deal was found by Cheapflights users on 8/7. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/62:14 pmSFO - BHD
2 stops21h 01mBritish Airways
Sat 9/139:35 amBHD - SFO
2 stops20h 11mBritish Airways
Deal found 8/7$696
This Virgin Atlantic deal was found by Cheapflights users on 8/5. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:00 amSFO - BHD
2 stops26h 50mVirgin Atlantic
Sun 12/75:20 pmBHD - SFO
1 stop26h 30mVirgin Atlantic
Deal found 8/5$738
This Mytrip deal was found by Cheapflights users on 8/6. 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.
Mon 9/224:20 pmSFO - BFS
3 stops22h 40mMultiple Airlines
Fri 9/266:05 amBFS - SFO
3 stops37h 16mMultiple Airlines
Deal found 8/6$828
This Delta deal was found by Cheapflights users on 8/5. 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.
Wed 12/311:05 amSFO - BHD
2 stops21h 45mDelta
Sun 12/76:30 amBHD - SFO
1 stop13h 20mDelta
Deal found 8/5$828
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 9/227:20 pmSFO - BHD
1 stop14h 10mMultiple Airlines
Fri 9/267:00 amBHD - SFO
2 stops24h 59mMultiple Airlines
Deal found 8/6$957
This Mytrip deal was found by Cheapflights users on 8/5. 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.
Fri 9/1912:15 pmSFO - BFS
2 stops24h 45mMultiple Airlines
Fri 9/2610:55 amBFS - SFO
3 stops31h 40mMultiple Airlines
Deal found 8/5$1,399

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 August 7, 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

Wed 12/3

5:30 pm-4:35 pm

1 stop15h 05m

Belfast City

Sun 12/7

5:35 pm-3:00 pm

1 stop29h 25m

$658

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 9/22

4:20 pm-11:00 pm

3 stops22h 40m

Belfast Intl

Wed 9/24

8:20 am-2:30 pm

3 stops38h 10m

$694

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sat 9/6

2:14 pm-7:15 pm

2 stops21h 01m

Belfast City

Sat 9/13

9:35 am-9:46 pm

2 stops20h 11m

$696

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/3

6:00 am-4:50 pm

2 stops26h 50m

Belfast City

Sun 12/7

5:20 pm-11:50 am

1 stop26h 30m

$738

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/3

11:05 am-4:50 pm

2 stops21h 45m

Belfast City

Sun 12/7

6:30 am-11:50 am

1 stop13h 20m

$828

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 9/22

4:20 pm-11:00 pm

3 stops22h 40m

Belfast Intl

Fri 9/26

6:05 am-11:21 am

3 stops37h 16m

$828

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 9/22

7:20 pm-5:30 pm

1 stop14h 10m

Belfast City

Fri 9/26

7:00 am-11:59 pm

2 stops24h 59m

$957

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 9/19

12:15 pm-9:00 pm

2 stops24h 45m

Belfast Intl

Fri 9/26

10:55 am-10:35 am

3 stops31h 40m

$1,399

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

4:20 pm-7:35 pm

2 stops19h 15m

$304

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 9/7

2:22 pm-8:35 am

2 stops58h 13m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 12 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, February is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $657). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of $1,189). 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 August 7, 2025.

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

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 August 7, 2025.
Get a feel of what it's like to fly with KLM, American Airlines, and Iberia 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.
KLM
7.8
Good
1,382 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,382 reviews
KLM
7.8
Good
1,382 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,382 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Iberia
7.0
Good
2,866 reviews
KLM
7.8
Good
1,382 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
British Airways
6.7
Okay
7,251 reviews
KLM
7.8
Good
1,382 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

  • 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, February is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $657). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of $1,189). 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
San Francisco to Gatwick flights
Los Angeles to London City flights
San Francisco to London City flights
Los Angeles to Gatwick flights
Ontario to Heathrow flights
Los Angeles to Stansted flights
San Diego to Heathrow flights
Los Angeles to Luton flights
San Francisco to Stansted flights
San Francisco to Luton flights
Las Vegas to Heathrow flights
San Diego to Gatwick flights
Los Angeles to Edinburgh flights
Oakland to Heathrow flights
San Jose to Heathrow flights
Sacramento to Heathrow flights
San Diego to London City flights
San Francisco to Edinburgh flights
Los Angeles to Belfast Intl flights
Los Angeles to Belfast City flights
Santa Ana to Heathrow flights
Sacramento to Gatwick flights
Las Vegas to London City flights
Burbank to Heathrow flights
San Francisco to Manchester flights
Los Angeles to Southend flights
Las Vegas to Gatwick flights
San Diego to Edinburgh flights
Los Angeles to Manchester flights
Reno to Heathrow flights
San Francisco to Southampton flights
San Jose to Gatwick flights
Los Angeles to Glasgow Intl flights
Long Beach to Heathrow flights
San Diego to Stansted flights
Sacramento to London City flights
Ontario to Gatwick flights
Las Vegas to Stansted flights
Las Vegas to Luton flights
Oakland to Gatwick flights
Santa Ana to Gatwick flights
San Jose to Manchester flights
Ontario to Edinburgh flights
San Francisco to Glasgow Intl flights
Arcata to Heathrow flights
Palm Springs to Heathrow flights
Sacramento to Edinburgh flights
Las Vegas to Edinburgh flights

Top 2 airlines flying from San Francisco to Northern Ireland

Discover the top 2 airlines 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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$588Average$754FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$840FlexibilityNo cancel feeOn-time71%

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.