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$413+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — SFO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$601
(United Airlines)

One-way from

$413
(Kiwi.com)

Popular in

July

Cheapest in

March
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. 3% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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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 September 17, 2025.

This United Airlines deal was found by Cheapflights users on 9/16. 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 10/212:30 pmSNN - SFO
1 stop16h 53mUnited Airlines
Tue 10/711:50 amSFO - SNN
1 stop14h 25mUnited Airlines
Deal found 9/16$601
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Fri 9/2612:30 pmSNN - SFO
1 stop16h 53mUnited Airlines
Tue 9/307:12 amSFO - SNN
2 stops19h 03mUnited Airlines
Deal found 9/17$604
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 11/115:30 pmSNN - SFO
2 stops30h 05mAer Lingus
Thu 11/2011:15 amSFO - SNN
2 stops24h 10mAer Lingus
Deal found 9/16$738
This British Airways deal was found by Cheapflights users on 9/16. 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.
Sat 11/17:50 amSNN - SFO
2 stops19h 52mBritish Airways
Sat 11/85:00 pmSFO - SNN
2 stops15h 45mBritish Airways
Deal found 9/16$740
This TravelUp deal was found by Cheapflights users on 9/16. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:05 pmSNN - SFO
2 stops31h 23mBritish Airways
Fri 11/73:30 pmSFO - SNN
2 stops16h 15mBritish Airways
Deal found 9/16$745
This TravelUp deal was found by Cheapflights users on 9/16. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:50 amSNN - SFO
1 stop14h 50mMultiple Airlines
Fri 11/74:30 pmSFO - SNN
1 stop15h 15mMultiple Airlines
Deal found 9/16$750
This American Airlines deal was found by Cheapflights users on 9/16. 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 11/17:50 amSNN - SFO
2 stops22h 39mAmerican Airlines
Sat 11/87:20 amSFO - SNN
1 stop14h 35mAmerican Airlines
Deal found 9/16$765
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Tue 11/117:50 amSNN - SFO
2 stops20h 38mAmerican Airlines
Thu 11/207:20 amSFO - SNN
1 stop14h 35mAmerican Airlines
Deal found 9/17$766

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 September 17, 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 10/2

12:30 pm-11:59 pm

2 stops19h 29m

San Francisco

Tue 10/7

10:35 am-10:15 am

1 stop15h 40m

$601

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 3/5

7:50 am-3:00 pm

1 stop15h 10m

San Francisco

Mon 3/9

1:25 pm-4:45 pm

2 stops20h 20m

$732

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Tue 11/11

5:30 pm-3:35 pm

2 stops30h 05m

San Francisco

Thu 11/20

11:15 am-7:25 pm

2 stops24h 10m

$738

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sat 11/1

7:50 am-8:42 pm

2 stops19h 52m

San Francisco

Sat 11/8

5:00 pm-4:45 pm

2 stops15h 45m

$740

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Wed 11/12

2:20 pm-4:05 pm

3 stops57h 45m

$413

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Wed 11/12

7:50 am-10:05 pm

2 stops22h 15m

$422

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sun 10/12

1:35 pm-10:41 am

3 stops53h 06m

$530

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Sun 10/12

9:15 pm-1:50 pm

1 stop24h 35m

$842

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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 $357). 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.

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

    Airlines like United Airlines and American Airlines fly from Shannon, Clare to San Francisco in about 15h 10m. The time it takes to get you to your destination can typically vary by up to 4h 19m. Shannon, Clare and San Francisco are separated by a distance of 5032 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $357). 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
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Livermore
South San Francisco
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Hollister
Vacaville
Foster City
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Vallejo
Burlingame
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San Mateo
San Leandro
Lathrop

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