HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$727+ Cheap flights from Shannon (SNN) to San Francisco (SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — SFO
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Shannon to San Francisco with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 3, 2025.

Round-trip from

$727
(TravelUp)

Popular in

August

Cheapest in

March

Average price

$786
From Shannon to San Francisco
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

This TravelUp deal was found by Cheapflights users on 7/2. 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.
Mon 8/259:15 pmSNN - SFO
2 stops28h 37mBritish Airways
Mon 9/14:30 pmSFO - SNN
1 stop20h 05mBritish Airways
Deal found 7/2$727
This lol.travel deal was found by Cheapflights users on 6/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:30 pmSNN - SFO
1 stop19h 01mLufthansa
Sun 8/317:00 amSFO - SNN
1 stop19h 15mLufthansa
Deal found 6/30$730
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/259:15 pmSNN - SFO
1 stop24h 35mAmerican Airlines
Mon 9/13:21 pmSFO - SNN
2 stops16h 49mAmerican Airlines
Deal found 7/2$733
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:30 pmSNN - SFO
2 stops16h 21mUnited Airlines
Sun 8/317:00 amSFO - SNN
1 stop16h 30mUnited Airlines
Deal found 6/30$741
This KLM deal was found by Cheapflights users on 7/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/251:05 pmSNN - SFO
2 stops31h 06mMultiple Airlines
Mon 9/16:15 amSFO - SNN
2 stops20h 55mMultiple Airlines
Deal found 7/2$782
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/241:05 pmSNN - SFO
1 stop31h 21mDelta
Mon 8/119:35 amSFO - SNN
1 stop17h 35mDelta
Deal found 7/2$862
This SmartFares deal was found by Cheapflights users on 7/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/171:05 pmSNN - SFO
1 stop15h 48mAir France
Mon 7/219:35 amSFO - SNN
1 stop17h 35mAir France
Deal found 7/1$907

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 July 3, 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

Mon 8/25

9:15 pm-5:52 pm

2 stops28h 37m

San Francisco

Mon 9/1

4:30 pm-8:35 pm

1 stop20h 05m

$727

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/25

12:30 pm-11:31 pm

1 stop19h 01m

San Francisco

Sun 8/31

7:00 am-10:15 am

1 stop19h 15m

$730

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/25

9:15 pm-1:50 pm

1 stop24h 35m

San Francisco

Mon 9/1

3:21 pm-4:10 pm

2 stops16h 49m

$733

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/25

9:30 am-8:10 pm

2 stops18h 40m

San Francisco

Sun 8/31

8:32 am-7:30 am

1 stop14h 58m

$741

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Mon 8/25

1:05 pm-12:11 pm

2 stops31h 06m

San Francisco

Mon 9/1

6:15 am-11:10 am

2 stops20h 55m

$782

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 7/24

1:05 pm-12:26 pm

1 stop31h 21m

San Francisco

Mon 8/11

9:35 am-11:10 am

1 stop17h 35m

$862

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Thu 7/17

1:05 pm-8:53 pm

1 stop15h 48m

San Francisco

Mon 7/21

9:35 am-11:10 am

1 stop17h 35m

$907

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Fri 7/25

11:25 pm-2:48 pm

3 stops47h 23m

$743

ShannonSan Francisco

SNN - SFO

SNNSFO

Shannon

Fri 7/25

12:30 pm-9:42 pm

1 stop17h 12m

$792

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 $360). 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 San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated July 3, 2025.
Read through reviews of airlines operating flights from Shannon to San Francisco, such as Delta, Air France, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Lufthansa
6.8
Okay
7,207 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    Currently priced at $727, British Airways will fly you from Shannon, Clare to San Francisco and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and American Airlines - these airlines can fly you to your destination from $730 and $733, respectively. Users have found that British Airways is 1% cheaper than the other options available to this destination.

  • 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 $360). 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
Roseville
Mountain View
South San Francisco
Livermore
Santa Cruz
Turlock
Manteca
Watsonville
Antioch
Hollister
Newark
Alameda
Hayward
Milpitas
Sunnyvale
Daly City
Campbell
Foster City
Capitola
Richmond

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.