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

For as low as $633, United Airlines can have you in Shannon, Clare from San Francisco in 15h 46m. The distance from San Francisco to Shannon, Clare is about 5032 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

According to our current data, American Airlines ($533), United Airlines ($591), and Delta ($664) offers the cheapest pricing from San Francisco to Shannon, Clare. You may be able to fly from San Francisco to Shannon, Clare for 33% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in Shannon, Clare ranges from 2.3 - 4.1 inches per month. October is typically the wettest month, when rainfall can reach 4.1 in. April is typically the driest time to visit Shannon, Clare when rainfall is around 2.3 in.

If weather is an important factor for your trip to Shannon, Clare, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

What are the most popular airlines that fly from San Francisco to Shannon, Clare?

The most popular airlines flying from San Francisco to Shannon, Clare are United Airlines, Delta and American Airlines. Something to consider prior to booking your flight.

What is the cheapest time of day to fly from SFO to SNN?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to Shannon, Clare as you normally would.

Most accurate provider : When it comes to deals on San Francisco-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Shannon, Clare flight deals on Cheapflights vs. FlightHub >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 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 San Francisco-Shannon, Clare flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$351+ Flights from San Francisco to Shannon

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Cheap 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 January 28, 2026.

Tue 9/14:35 pm

SFO

SNN

1 stop15h 35m

American Airlines

Wed 9/169:15 pm

SNN

SFO

1 stop24h 35m

American Airlines

Deal found 1/26

$516

Tue 9/81:16 pm

SFO

SNN

2 stops18h 54m

American Airlines

Tue 9/159:15 pm

SNN

SFO

1 stop24h 35m

American Airlines

Deal found 1/26

$521

Tue 9/16:00 am

SFO

SNN

1 stop17h 30m

United Airlines

Wed 9/169:30 am

SNN

SFO

1 stop19h 52m

United Airlines

Deal found 1/27

$534

Mon 8/3110:35 pm

SFO

SNN

2 stops24h 55m

United Airlines

Tue 9/159:30 am

SNN

SFO

2 stops16h 14m

United Airlines

Deal found 1/27

$538

Thu 4/307:15 am

SFO

SNN

2 stops19h 00m

United Airlines

Thu 5/1412:30 pm

SNN

SFO

2 stops26h 40m

United Airlines

Deal found 1/26

$605

Mon 2/235:30 pm

SFO

SNN

1 stop15h 15m

American Airlines

Mon 3/27:50 am

SNN

SFO

1 stop15h 10m

American Airlines

Deal found 1/25

$618

Best flights from San Francisco to Shannon
Discover carefully curated flight deals from San Francisco to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 28, 2026.

Wed 4/296:40 am

SFO

SNN

2 stops19h 35m

United Airlines

Fri 5/812:30 pm

SNN

SFO

2 stops26h 40m

United Airlines

Deal found 1/27

$538

Mon 2/234:59 pm

SFO

SNN

2 stops15h 46m

American Airlines

Mon 3/27:50 am

SNN

SFO

2 stops22h 50m

American Airlines

Deal found 1/25

$633

Mon 3/211:07 am

SFO

SNN

2 stops21h 38m

Air Canada

Mon 3/165:30 pm

SNN

SFO

2 stops55h 03m

Air Canada

Deal found 1/27

$769

Thu 4/307:15 am

SFO

SNN

2 stops19h 00m

United Airlines

Thu 5/1412:30 pm

SNN

SFO

2 stops28h 18m

United Airlines

Deal found 1/25

$605

Wed 4/298:15 am

SFO

SNN

2 stops18h 00m

United Airlines

Wed 6/249:30 am

SNN

SFO

1 stop18h 30m

United Airlines

Deal found 1/27

$648

Last-minute flights from San Francisco to Shannon
Discover last-minute flight deals from San Francisco to Shannon. Data last updated January 28, 2026 and is based on user searches.

Mon 2/235:30 pm

SFO

SNN

1 stop15h 15m

American Airlines

Mon 3/27:50 am

SNN

SFO

1 stop15h 10m

American Airlines

Deal found 1/25

$618

Thu 2/265:30 pm

SFO

SNN

1 stop15h 15m

British Airways

Thu 3/57:50 am

SNN

SFO

1 stop15h 10m

British Airways

Deal found 1/27

$782

Thu 2/261:20 pm

SFO

SNN

2 stops38h 10m

Air Canada

Mon 3/25:30 pm

SNN

SFO

2 stops35h 04m

Air Canada

Deal found 1/26

$818

Thu 2/268:40 pm

SFO

SNN

1 stop14h 45m

British Airways

Mon 3/28:05 pm

SNN

SFO

1 stop26h 55m

British Airways

Deal found 1/26

$820

One-way flights from San Francisco to Shannon
Search for one-way flight options from San Francisco to Shannon. Find affordable one-way fares based on user searches. Data last updated January 28, 2026.

Tue 6/911:50 pm

SFO

SNN

2 stops23h 40m

United Airlines

Deal found 1/27

$351

Fri 5/155:35 pm

SFO

SNN

2 stops33h 45m

British Airways

Deal found 1/27

$398

Fri 2/65:20 pm

SFO

SNN

2 stops39h 25m

Aer Lingus

Deal found 1/27

$416

Fri 5/1510:16 pm

SFO

SNN

1 stop23h 44m

American Airlines

Deal found 1/27

$418

Fri 5/155:49 pm

SFO

SNN

3 stops43h 21m

Multiple Airlines

Deal found 1/27

$421

Wed 2/48:26 am

SFO

SNN

1 stop13h 54m

Multiple Airlines

Deal found 1/25

$443

Sat 3/149:04 pm

SFO

SNN

3 stops50h 16m

Multiple Airlines

Deal found 1/27

$450

Find flight deals from San Francisco to Shannon

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$538 (United Airlines)
One-way from	$351 (United Airlines)
Popular in	June
Cheapest in	December
Average price	$666

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. 17% potential increase in price ($173 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2026

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 4/29

6:40 am-10:15 am

2 stops19h 35m

Shannon

Fri 5/8

12:30 pm-7:10 am

2 stops26h 40m

$538

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Thu 4/30

7:15 am-10:15 am

2 stops19h 00m

Shannon

Thu 5/14

12:30 pm-8:48 am

2 stops28h 18m

$605

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Mon 2/23

4:59 pm-4:45 pm

2 stops15h 46m

Shannon

Mon 3/2

7:50 am-10:40 pm

2 stops22h 50m

$633

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Wed 4/29

8:15 am-10:15 am

2 stops18h 00m

Shannon

Wed 6/24

9:30 am-8:00 pm

1 stop18h 30m

$648

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Mon 3/2

11:07 am-4:45 pm

2 stops21h 38m

Shannon

Mon 3/16

5:30 pm-5:33 pm

2 stops55h 03m

$769

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Tue 6/9

11:50 pm-7:30 am

2 stops23h 40m

$351

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Fri 5/15

5:35 pm-11:20 am

2 stops33h 45m

$398

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Fri 2/6

5:20 pm-4:45 pm

2 stops39h 25m

$416

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Fri 5/15

10:16 pm-6:00 am

1 stop23h 44m

$418

San FranciscoShannon

SFO - SNN

SFOSNN

San Francisco

Fri 5/15

5:49 pm-9:10 pm

3 stops43h 21m

$421

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 13 results

Compare providers for flights from San Francisco to Shannon

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 January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Shannon, Clare flight deals on Cheapflights vs. FlightHub >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 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 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?

The best time to book flights from San Francisco to Shannon, Clare is 44 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, April is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $508). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $839). 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.

Reviews of airlines servicing Shannon

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

7.9

Good

8,124 reviews

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

8,124 reviews

Delta

7.9

Good

8,124 reviews

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

9,212 reviews

Delta

7.9

Good

8,124 reviews

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

11,201 reviews

Delta

7.9

Good

8,124 reviews

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

How long is the flight from San Francisco to Shannon, Clare?
For as low as $633, United Airlines can have you in Shannon, Clare from San Francisco in 15h 46m. The distance from San Francisco to Shannon, Clare is about 5032 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from San Francisco to Shannon, Clare round-trip?
According to our current data, American Airlines ($533), United Airlines ($591), and Delta ($664) offers the cheapest pricing from San Francisco to Shannon, Clare. You may be able to fly from San Francisco to Shannon, Clare for 33% 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, April is the cheapest month in which you can book a flight from San Francisco to Shannon, Clare (average of $508). Flying from San Francisco to Shannon, Clare in June is currently the most expensive (average of $839). 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

Ennis

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from San Francisco to Shannon

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$533	Average$661	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$591	Average$886	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$664	Average$885	FlexibilityNo cancel fee	On-timeN/A

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$351+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Francisco to Shannon with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from San Francisco to Shannon

Cheapest flights from San Francisco to ShannonExplore 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 January 28, 2026.

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 January 28, 2026.

Find flight deals from San Francisco to Shannon

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 January.

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.

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?

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

Reviews of airlines servicing Shannon

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.

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?

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

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

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

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

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

Traveling to a place near Shannon?

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Alternative routes for San Francisco to Shannon

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Top 3 airlines flying from San Francisco to Shannon

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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 January 28, 2026.