$610+ Cheap flights from San Francisco (SFO) to Shannon (SNN)
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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SNN
Oct 13 — Oct 201
Round-trip
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
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 San Francisco to Shannon
Cheapest
Best
Last-minute
One-way
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 September 13, 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 September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/205:00 am -
2 stops18h 30m
Tue 10/612:30 pm -
2 stops20h 00m
Deal found 9/11![United Airlines logo]()
$610
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/287:00 am -
2 stops19h 15m
Tue 10/1312:30 pm -
2 stops18h 22m
Deal found 9/11![United Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/2311:20 am -
1 stop14h 55m
Tue 10/612:30 pm -
1 stop19h 02m
Deal found 9/10![United Airlines logo]()
$685
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2310:43 am -
2 stops15h 32m
Wed 10/1412:30 pm -
2 stops26h 11m
Deal found 9/11![United Airlines logo]()
$690
This Ovago deal was found by Cheapflights users on 9/10. 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.
Wed 9/238:15 am -
1 stop18h 00m
Tue 10/612:30 pm -
1 stop16h 52m
Deal found 9/10![Lufthansa logo]()
$705
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/58:45 am -
2 stops17h 30m
Tue 10/2012:30 pm -
2 stops17h 17m
Deal found 9/11![United Airlines logo]()
$734
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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.
Mon 10/266:20 pm -
2 stops18h 05m
Mon 11/28:05 pm -
2 stops27h 30m
Deal found 9/11![Aer Lingus logo]()
$786
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:25 pm -
1 stop15h 20m
Mon 11/28:05 pm -
1 stop26h 50m
Deal found 9/11![British Airways logo]()
$803
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Wed 9/235:40 pm -
2 stops18h 55m
Tue 10/69:15 pm -
2 stops26h 40m
Deal found 9/10![Aer Lingus logo]()
$805
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:35 pm -
1 stop15h 35m
Tue 10/137:30 am -
1 stop14h 20m
Deal found 9/10![Multiple Airlines logo]()
$810
Best flights from San Francisco to ShannonDiscover 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 September 13, 2026.
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 September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/12. 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 9/288:15 am -
2 stops18h 00m
Tue 10/1312:30 pm -
2 stops18h 22m
Deal found 9/12![United Airlines logo]()
$624
This Cheapflightsfares deal was found by Cheapflights users on 9/12. 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 1/195:25 pm -
1 stop18h 00m
Tue 1/267:50 am -
1 stop15h 05m
Deal found 9/12![British Airways logo]()
$798
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:35 pm -
1 stop15h 35m
Tue 10/137:30 am -
1 stop14h 20m
Deal found 9/13![Multiple Airlines logo]()
$810
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/238:45 am -
2 stops17h 30m
Tue 10/612:30 pm -
2 stops18h 22m
Deal found 9/10![United Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/55:00 am -
2 stops21h 15m
Tue 10/2012:30 pm -
1 stop14h 44m
Deal found 9/12![United Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/2311:20 am -
1 stop14h 55m
Wed 10/1412:30 pm -
2 stops27h 11m
Deal found 9/10![United Airlines logo]()
$690
Last-minute flights from San Francisco to ShannonDiscover last-minute flight deals from San Francisco to Shannon. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Shannon. Data last updated September 13, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/205:00 am -
2 stops18h 30m
Tue 10/612:30 pm -
2 stops20h 00m
Deal found 9/11![United Airlines logo]()
$610
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/2311:20 am -
1 stop14h 55m
Tue 10/612:30 pm -
1 stop19h 02m
Deal found 9/10![United Airlines logo]()
$685
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2310:43 am -
2 stops15h 32m
Wed 10/1412:30 pm -
2 stops26h 11m
Deal found 9/11![United Airlines logo]()
$690
This Ovago deal was found by Cheapflights users on 9/10. 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.
Wed 9/238:15 am -
1 stop18h 00m
Tue 10/612:30 pm -
1 stop16h 52m
Deal found 9/10![Lufthansa logo]()
$705
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Wed 9/235:40 pm -
2 stops18h 55m
Tue 10/69:15 pm -
2 stops26h 40m
Deal found 9/10![Aer Lingus logo]()
$805
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/287:00 am -
2 stops19h 15m
Tue 10/1312:30 pm -
2 stops18h 22m
Deal found 9/11![United Airlines logo]()
$624
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:35 pm -
1 stop15h 35m
Tue 10/137:30 am -
1 stop14h 20m
Deal found 9/10![Multiple Airlines logo]()
$810
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/58:45 am -
2 stops17h 30m
Tue 10/2012:30 pm -
2 stops17h 17m
Deal found 9/11![United Airlines logo]()
$734
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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.
Mon 10/266:20 pm -
2 stops18h 05m
Mon 11/28:05 pm -
2 stops27h 30m
Deal found 9/11![Aer Lingus logo]()
$786
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:25 pm -
1 stop15h 20m
Mon 11/28:05 pm -
1 stop26h 50m
Deal found 9/11![British Airways logo]()
$803
One-way flights from San Francisco to ShannonSearch for one-way flight options from San Francisco to Shannon. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
Search for one-way flight options from San Francisco to Shannon. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Thrive Travel deal was found by Cheapflights users on 9/12. 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 Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:00 am -
1 stop19h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Lufthansa logo]()
$3,742
This BusinessClass deal was found by Cheapflights users on 9/12. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:21 am -
2 stops24h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![British Airways logo]()
$4,687
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Sat 10/106:45 am -
3 stops19h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![United Airlines logo]()
$5,528
Find 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 September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $624 (United Airlines) |
Popular in | November |
Cheapest in | December |
Average price | $931 |
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 7,457,451 searches. Data last updated September 13, 2026.
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
Cheapest round-trip
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Mon 9/28
8:15 am-10:15 am
2 stops18h 00m
Shannon
Tue 10/13
12:30 pm-10:52 pm
2 stops18h 22m
$624
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Wed 9/23
8:45 am-10:15 am
2 stops17h 30m
Shannon
Tue 10/6
12:30 pm-10:52 pm
2 stops18h 22m
$624
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Mon 10/5
5:00 am-10:15 am
2 stops21h 15m
Shannon
Tue 10/20
12:30 pm-7:14 pm
1 stop14h 44m
$624
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Wed 9/23
11:20 am-10:15 am
1 stop14h 55m
Shannon
Wed 10/14
12:30 pm-7:41 am
2 stops27h 11m
$690
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Tue 1/19
5:25 pm-7:25 pm
1 stop18h 00m
Shannon
Tue 1/26
7:50 am-2:55 pm
1 stop15h 05m
$798
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Mon 9/28
4:35 pm-4:10 pm
1 stop15h 35m
Shannon
Tue 10/13
7:30 am-1:50 pm
1 stop14h 20m
$810
Quickest round-trip
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Sat 10/10
7:00 am-10:15 am
1 stop19h 15m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$3,742
San FranciscoShannon
SFO San Francisco - SNN Shannon
SFOSNN
San Francisco
Sat 10/10
6:45 am-10:15 am
3 stops19h 30m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$5,528
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
SFO-SNN
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
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 September 13, 2026.
See what other customers who have flown with Air France,United Airlines, andAmerican 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.
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
Food
7.1
Comfort
7.4
Crew
8.2
Entertainment
7.0
Overall
7.5
Boarding
7.5
Reviews
1 / 20
2.0
MediocreMichael,Aug 2026
CDG - AMS
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.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for San Francisco to Shannon
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Complete your trip
Complete your trip to Shannon by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Shannon by cabin class
Find flights from San Francisco to Shannon, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Shannon flights
Browse other San Francisco and Shannon flight options. Last updated on September 13, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on September 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Shannon
Explore flights to Shannon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 13, 2026.
Top 5 airlines flying from San Francisco to Shannon
Discover the top 5 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 7,457,451 searches. Data last updated September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$468 | Average$1,046 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$593 | Average$1,067 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$660 | Average$931 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$694 | Average$990 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$875 | Average$987 | FlexibilityNo cancel fee | On-time76% |