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Shannon

$278+ Cheap flights from San Francisco (SFO) to Shannon (SNN)

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SNN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Shannon are usually found in October or January, booked 16 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from San Francisco to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Shannon (SNN). 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

$623
(United Airlines)

One-way from

$278
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$758
From San Francisco to Shannon
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One-way flight from San Francisco to Shannon
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Highest demand for flights based on searches. 8% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 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 San Francisco to Shannon

Cheapest flights from San Francisco to Shannon
Explore the most affordable flight options available from San Francisco to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

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.
Sun 9/77:00 amSFO - SNN
1 stop16h 30mUnited Airlines
Sun 9/149:30 amSNN - SFO
1 stop32h 35mUnited Airlines
Deal found 8/14$623
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.
Wed 9/109:00 amSFO - SNN
2 stops18h 20mAmerican Airlines
Wed 10/157:40 amSNN - SFO
1 stop17h 45mAmerican Airlines
Deal found 8/14$631
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.
Wed 9/106:30 amSFO - SNN
2 stops17h 00mUnited Airlines
Wed 10/1512:30 pmSNN - SFO
2 stops19h 29mUnited Airlines
Deal found 8/13$633
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.
Wed 10/223:51 pmSFO - SNN
2 stops16h 19mAmerican Airlines
Wed 11/127:50 amSNN - SFO
1 stop18h 55mAmerican Airlines
Deal found 8/14$636
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.
Wed 8/205:00 amSFO - SNN
2 stops21h 15mUnited Airlines
Tue 8/2612:30 pmSNN - SFO
1 stop14h 29mUnited Airlines
Deal found 8/14$640
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.
Sun 8/3110:53 pmSFO - SNN
2 stops24h 37mUnited Airlines
Thu 4/3012:30 pmSNN - SFO
2 stops18h 32mUnited Airlines
Deal found 8/14$647
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.
Wed 9/38:25 amSFO - SNN
2 stops15h 05mUnited Airlines
Thu 9/119:30 amSNN - SFO
1 stop15h 37mUnited Airlines
Deal found 8/14$665
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 9/110:53 pmSFO - SNN
2 stops24h 37mUnited Airlines
Mon 9/159:30 amSNN - SFO
2 stops15h 49mUnited Airlines
Deal found 8/14$669
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 9/157:20 pmSFO - SNN
1 stop17h 15mAmerican Airlines
Wed 9/249:15 pmSNN - SFO
1 stop24h 35mAmerican Airlines
Deal found 8/14$691
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.
Thu 8/288:25 amSFO - SNN
2 stops15h 05mUnited Airlines
Sun 8/319:30 amSNN - SFO
1 stop14h 00mUnited Airlines
Deal found 8/14$694

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Shannon 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 San Francisco to Shannon that are best for you.

Fly from

San Francisco

Fly to

Shannon

Route

Depart

Return

Price

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Sun 9/7

7:00 am-7:30 am

1 stop16h 30m

Shannon

Sun 9/14

9:30 am-10:05 am

1 stop32h 35m

$623

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Thu 10/30

6:30 pm-4:45 pm

1 stop15h 15m

Shannon

Tue 11/11

7:50 am-3:00 pm

1 stop15h 10m

$631

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 10/22

7:20 pm-8:35 pm

1 stop17h 15m

Shannon

Wed 11/12

7:50 am-3:00 pm

1 stop15h 10m

$631

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 9/10

3:59 pm-4:10 pm

2 stops16h 11m

Shannon

Wed 10/15

9:15 pm-1:50 pm

1 stop24h 35m

$631

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Sat 10/25

4:30 pm-5:45 pm

1 stop17h 15m

Shannon

Wed 11/12

7:50 am-6:45 pm

1 stop18h 55m

$631

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 9/10

6:30 am-7:30 am

2 stops17h 00m

Shannon

Wed 10/15

12:30 pm-11:59 pm

2 stops19h 29m

$633

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 8/20

5:00 am-10:15 am

2 stops21h 15m

Shannon

Tue 8/26

12:30 pm-6:59 pm

1 stop14h 29m

$640

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Tue 10/7

4:20 pm-8:20 pm

2 stops20h 00m

$278

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Sat 9/13

11:00 pm-4:35 pm

3 stops33h 35m

$311

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Sat 9/6

6:00 am-9:30 am

2 stops43h 30m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 12 results
1
2

Best time to book a flight from San Francisco to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon 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 Shannon

How far ahead should I book a flight from San Francisco to Shannon, Clare?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Shannon. Price data was last updated on August 8, 2025.

The best time to book flights from San Francisco to Shannon, Clare is 15 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $533). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $933). 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 SNN?

Find hourly flight availability from San Francisco to Shannon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s optimal to fly from San Francisco to Shannon, Clare in the afternoon. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from San Francisco to Shannon, Clare?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Shannon. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Francisco to Shannon, Clare flight should consider departing on Monday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Shannon

Get insights into the airlines that provide service to Shannon. 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 Shannon. Reviews last updated August 14, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from San Francisco to Shannon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.1
Good
1,214 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
7,266 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What are the cheapest airlines flying from San Francisco to Shannon, Clare round-trip?

    According to our current data, Air France ($578), American Airlines ($592), and United Airlines ($634) offers the cheapest pricing from San Francisco to Shannon, Clare. You may be able to fly from San Francisco to Shannon, Clare for 37% less than the average price by searching for these airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Shannon 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 Shannon, Clare?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $533). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $933). 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 Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis

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Top 6 airlines flying from San Francisco to Shannon

Discover the top 6 airlines that operate flights from San Francisco to Shannon. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$578Average$872FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$592Average$905FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$634Average$951FlexibilityNo cancel feeOn-time69%
DeltaCheapest$664Average$935FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$727Average$945FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$793Average$1,136FlexibilityNo cancel feeOn-time70%

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