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Shannon

$415+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SNN
Dec 31 — Jan 71
Wed 12/31
Wed 1/7
1 adult, Economy
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Find cheap flights from San Francisco to Shannon with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from San Francisco to Shannon are usually found in December or October, booked 16 days in advance, depart on a Monday or Tuesday and return on a Monday

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 December 1, 2025.

This Mytrip deal was found by Cheapflights users on 11/30. 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 12/12:40 pmSFO - SNN
2 stops20h 45mMultiple Airlines
Mon 12/88:05 pmSNN - SFO
2 stops28h 25mMultiple Airlines
Deal found 11/30$814
This British Airways deal was found by Cheapflights users on 11/30. 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.
Mon 12/156:00 amSFO - SNN
2 stops26h 45mBritish Airways
Fri 1/97:50 amSNN - SFO
2 stops36h 19mBritish Airways
Deal found 11/30$837
This British Airways deal was found by Cheapflights users on 11/30. 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.
Mon 12/156:00 amSFO - SNN
2 stops26h 45mBritish Airways
Thu 1/87:50 amSNN - SFO
2 stops33h 54mBritish Airways
Deal found 11/30$863
This Ovago deal was found by Cheapflights users on 12/1. 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.
Mon 12/15:20 pmSFO - SNN
2 stops34h 10mAer Lingus
Mon 12/85:30 pmSNN - SFO
2 stops30h 05mAer Lingus
Deal found 12/1$879
This British Airways deal was found by Cheapflights users on 11/30. 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.
Tue 12/167:00 amSFO - SNN
2 stops25h 45mBritish Airways
Fri 1/97:50 amSNN - SFO
2 stops33h 54mBritish Airways
Deal found 11/30$912
This British Airways deal was found by Cheapflights users on 11/30. 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.
Tue 12/167:00 amSFO - SNN
2 stops25h 45mBritish Airways
Thu 1/87:50 amSNN - SFO
2 stops33h 54mBritish Airways
Deal found 11/30$938
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 12/157:00 amSFO - SNN
1 stop15h 20mMultiple Airlines
Thu 1/82:45 pmSNN - SFO
2 stops40h 02mMultiple Airlines
Deal found 11/30$1,055
This Air Canada deal was found by Cheapflights users on 11/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:25 amSFO - SNN
2 stops24h 20mAir Canada
Sat 1/105:25 pmSNN - SFO
2 stops56h 04mAir Canada
Deal found 11/30$1,069
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 12/157:00 amSFO - SNN
1 stop15h 20mMultiple Airlines
Wed 1/78:05 pmSNN - SFO
2 stops58h 24mMultiple Airlines
Deal found 11/30$1,084
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 12/157:00 amSFO - SNN
1 stop15h 20mMultiple Airlines
Fri 1/97:50 amSNN - SFO
2 stops22h 50mMultiple Airlines
Deal found 11/30$1,103
This oojo deal was found by Cheapflights users on 11/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:00 pmSFO - SNN
2 stops17h 45mBritish Airways
Mon 12/85:30 pmSNN - SFO
1 stop29h 30mBritish Airways
Deal found 11/30$1,128

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 December 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$419
(American Airlines)

One-way from

$415
(American Airlines)

Popular in

June

Cheapest in

December

Average price

$627
Provider with most accurate pricing for San Francisco-Shannon flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Shannon flights.
Search Deals
From San Francisco to Shannon
Search Deals
One-way flight from San Francisco to Shannon
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 1, 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

Wed 1/21

5:30 pm-11:30 am

1 stop34h 00m

Shannon

Sun 1/25

7:50 am-3:00 pm

1 stop15h 10m

$669

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 1/21

11:41 am-4:45 pm

2 stops21h 04m

Shannon

Sun 1/25

7:50 am-9:37 pm

2 stops21h 47m

$685

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Mon 12/15

6:00 am-4:45 pm

2 stops26h 45m

Shannon

Fri 1/9

7:50 am-12:09 pm

2 stops36h 19m

$837

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Tue 1/20

5:30 pm-4:45 pm

1 stop15h 15m

Shannon

Fri 1/23

7:50 am-3:00 pm

1 stop15h 10m

$858

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Fri 2/6

5:30 pm-3:45 pm

1 stop14h 15m

$415

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Sun 12/28

7:25 pm-12:05 am

3 stops44h 40m

$425

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Thu 2/5

12:17 am-11:30 am

2 stops27h 13m

$516

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Thu 12/25

9:40 pm-1:10 pm

2 stops31h 30m

$542

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

Compare providers for flights from San Francisco to Shannon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Shannon in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Francisco-Shannon, Clare flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Francisco-Shannon, Clare flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Francisco-Shannon, Clare flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Shannon, Clare flights, Cheapflights users trust eDreams the most. eDreams 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 San Francisco-Shannon, Clare 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 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 November 28, 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, October is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $539). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $863). 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 December 1, 2025.

It’s optimal to fly from San Francisco to Shannon, Clare in the afternoon. By choosing this option you can save up to 6% 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 Tuesday evenings 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 December 1, 2025.
See what other customers who have flown with Delta, Air France, and United 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
7.9
Good
8,010 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

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
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

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.
Air France
7.4
Good
1,500 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

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
9,065 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

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
11,041 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

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.

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

    For as low as $669, American Airlines can have you in Shannon, Clare from San Francisco in 34h. The distance from San Francisco to Shannon, Clare is about 5032 mi.

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

    According to our current data, American Airlines ($533), Air France ($578), and United Airlines ($628) offers the cheapest pricing from San Francisco to Shannon, Clare. You may be able to fly from San Francisco to Shannon, Clare for 35% 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, October is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $539). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $863). 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 4 airlines flying from San Francisco to Shannon

Discover the top 4 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 December 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$533Average$684FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$578Average$872FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$628Average$916FlexibilityNo cancel feeOn-time69%
DeltaCheapest$664Average$935FlexibilityNo cancel feeOn-timeN/A

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