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$427+ Cheap flights from Shannon (SNN) to San Francisco (SFO)

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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — SFO
Jul 25 — Aug 11
Sat 7/25
Sat 8/1
1 adult, Economy
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Cheap flight deals from Shannon to San Francisco

Cheapest flights from Shannon to San Francisco
Explore the most affordable flight options available from Shannon to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 25, 2026.

This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:30 pm
SNN
-
SFO
1 stop14h 44m
United Airlines
Mon 9/75:00 am
SFO
-
SNN
2 stops18h 30m
United Airlines
Deal found 6/24$845
This KLM deal was found by Cheapflights users on 6/24. 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.
Thu 7/161:05 pm
SNN
-
SFO
1 stop17h 35m
KLM
Tue 7/2111:30 am
SFO
-
SNN
1 stop15h 40m
KLM
Deal found 6/24$894
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:30 pm
SNN
-
SFO
1 stop18h 29m
United Airlines
Thu 7/912:35 pm
SFO
-
SNN
1 stop13h 40m
United Airlines
Deal found 6/22$899
This United Airlines deal was found by Cheapflights users on 6/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:30 pm
SNN
-
SFO
1 stop14h 58m
United Airlines
Wed 8/125:00 am
SFO
-
SNN
2 stops21h 15m
United Airlines
Deal found 6/21$900
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:30 am
SNN
-
SFO
1 stop17h 19m
United Airlines
Tue 8/118:15 am
SFO
-
SNN
1 stop18h 00m
United Airlines
Deal found 6/24$907

Find flight deals from Shannon to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Shannon (SNN) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$845
(United Airlines)

One-way from

$428
(Cheapflightsfares)
Provider with most accurate pricing for Shannon-San Francisco flight deals.
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Provider most trusted by Cheapflights users for Shannon-San Francisco flights.
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From Shannon to San Francisco
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One-way flight from Shannon to San Francisco
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Shannon to San Francisco 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 June 25, 2026.
Use the filters below to find and compare flights from Shannon to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 9/3

12:30 pm-10:37 pm

1 stop18h 07m

San Francisco

Mon 9/7

10:05 am-7:30 am

1 stop13h 25m

$845

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/3

9:30 am-11:02 pm

2 stops21h 32m

San Francisco

Wed 8/12

8:21 am-7:30 am

2 stops15h 09m

$894

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 7/6

12:30 pm-10:59 pm

1 stop18h 29m

San Francisco

Thu 7/16

8:15 am-7:30 am

1 stop15h 15m

$897

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sun 7/5

9:30 am-10:57 pm

1 stop21h 27m

San Francisco

Fri 7/24

12:35 pm-10:15 am

1 stop13h 40m

$899

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 7/16

1:05 pm-10:40 pm

1 stop17h 35m

San Francisco

Tue 7/21

11:30 am-11:10 am

1 stop15h 40m

$900

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/3

12:30 pm-10:56 pm

2 stops18h 26m

San Francisco

Mon 8/10

8:15 am-7:30 am

2 stops15h 15m

$900
Cheapest one-way

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Tue 10/20

9:15 pm-3:55 pm

2 stops26h 40m

$427

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 7/13

8:10 am-8:45 pm

3 stops44h 35m

$727

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sun 7/5

11:50 am-10:00 am

3 stops54h 10m

$728
Quickest one-way

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 9/21

7:30 am-6:09 pm

2 stops18h 39m

$730

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 11 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Shannon, Clare-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Shannon, Clare-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Shannon, Clare-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Shannon, Clare-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Shannon, Clare-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Shannon to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Shannon 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.

Related info for your journey

Find useful and relevant information for your journey from Shannon to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Shannon, Clare to San Francisco?

    Airlines like United Airlines fly from Shannon, Clare to San Francisco in about 14h 44m. The time it takes to get you to your destination can typically vary by up to . Shannon, Clare and San Francisco are separated by a distance of 5032 mi.

  • Can I find deals for flights from Shannon to San Francisco that include hotel bookings?

    Yes. In addition to deals on Shannon to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Shannon to San Francisco?

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

  • Can I find deals for business class flights from Shannon to San Francisco?

    Yes. Cheapflights offers flight deals from Shannon 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.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
South San Francisco
Santa Clara
Santa Cruz
Fairfield
Burlingame
Rancho Cordova
Roseville
Cupertino
Emeryville
Watsonville
Newark
San Bruno
Hayward
San Ramon
San Carlos
Redwood City
Turlock
Daly City
Sunnyvale
Vallejo

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