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$489+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — SFO
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$587
(Lufthansa)

One-way from

$489
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$905
From Shannon to San Francisco
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One-way flight from Shannon to San Francisco
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Highest demand for flights based on searches. 12% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 14, 2025.

This Lufthansa deal was found by Cheapflights users on 8/13. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:30 pmSNN - SFO
1 stop16h 02mLufthansa
Mon 9/87:00 amSFO - SNN
1 stop19h 15mLufthansa
Deal found 8/13$587
This United Airlines deal was found by Cheapflights users on 8/13. 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 9/49:30 amSNN - SFO
2 stops16h 02mUnited Airlines
Mon 9/86:30 amSFO - SNN
2 stops17h 00mUnited Airlines
Deal found 8/13$594
This Gotogate deal was found by Cheapflights users on 8/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:15 pmSNN - SFO
2 stops26h 40mAer Lingus
Mon 10/137:20 pmSFO - SNN
1 stop17h 15mAer Lingus
Deal found 8/14$710
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:05 pmSNN - SFO
2 stops27h 30mAer Lingus
Thu 11/205:30 pmSFO - SNN
1 stop17h 55mAer Lingus
Deal found 8/14$731
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:40 amSNN - SFO
2 stops20h 47mAmerican Airlines
Mon 10/139:16 amSFO - SNN
2 stops18h 04mAmerican Airlines
Deal found 8/14$734
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 9/612:30 pmSNN - SFO
2 stops17h 16mUnited Airlines
Wed 9/108:30 amSFO - SNN
1 stop15h 00mUnited Airlines
Deal found 8/13$739
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/272:35 pmSNN - SFO
1 stop17h 24mAmerican Airlines
Sat 10/41:21 pmSFO - SNN
2 stops18h 44mAmerican Airlines
Deal found 8/13$740
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/612:30 pmSNN - SFO
1 stop19h 01mUnited Airlines
Mon 10/1311:50 amSFO - SNN
1 stop14h 25mUnited Airlines
Deal found 8/14$779

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 August 14, 2025.
Use the filters below to find and compare flights from Shannon to San Francisco that are best for you.

Fly from

Shannon

Fly to

San Francisco

Route

Depart

Return

Price

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 9/4

12:30 pm-8:32 pm

1 stop16h 02m

San Francisco

Mon 9/8

7:00 am-10:15 am

1 stop19h 15m

$587

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 9/4

1:05 pm-1:35 am

1 stop20h 30m

San Francisco

Mon 9/8

1:00 pm-11:10 am

1 stop14h 10m

$594

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sat 9/27

12:30 pm-7:45 am

2 stops27h 15m

San Francisco

Sat 10/4

11:50 am-10:15 am

1 stop14h 25m

$594

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 9/4

12:30 pm-8:32 pm

1 stop16h 02m

San Francisco

Mon 9/8

6:30 am-7:30 am

2 stops17h 00m

$594

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 10/6

9:15 pm-3:55 pm

2 stops26h 40m

San Francisco

Mon 10/13

7:20 pm-8:35 pm

1 stop17h 15m

$710

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Tue 11/11

8:05 pm-3:35 pm

2 stops27h 30m

San Francisco

Thu 11/20

8:40 pm-7:25 pm

1 stop14h 45m

$731

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 10/6

7:40 am-8:27 pm

2 stops20h 47m

San Francisco

Mon 10/13

9:16 am-11:20 am

2 stops18h 04m

$734

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Fri 9/12

4:55 pm-11:09 pm

2 stops38h 14m

$489

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Fri 9/12

12:30 pm-8:57 pm

1 stop16h 27m

$583

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sat 9/27

7:40 am-1:50 pm

1 stop14h 10m

$718

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 11 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Shannon to San Francisco

What is the cheapest month to book a flight from Shannon, Clare to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Shannon, Clare to San Francisco (average of $276). Flying from Shannon, Clare to San Francisco in June is currently the most expensive (average of $358). 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.

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.

  • 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.

  • What is the cheapest month to book a flight from Shannon, Clare to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Shannon, Clare to San Francisco (average of $276). Flying from Shannon, Clare to San Francisco in June is currently the most expensive (average of $358). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Mountain View
Turlock
Santa Clara
Hollister
Antioch
Watsonville
Manteca
Sunnyvale
Newark
Milpitas
Campbell
Foster City
San Leandro
Burlingame
Redwood City
Vallejo

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