SNN - SFO

£532 Find Cheap Flights from Shannon to San Francisco – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£532
Typical prices: £524-£717
British Airways
Thu 11/1Thu 18/1
SNN - SFO • 1 stop
Direct flights
Not available
There are currently no direct flights between Shannon and San Francisco. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
October
Cheapest • 11% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
London Heathrow (LHR)
Cheapest • Avg £567 (return)
Newark (EWR)
Shortest trip • 14h 17m (one-way)
Insights
Insights
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We hope you enjoy your trip to San Francisco!
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Flight Deals

Cheap Flights from Shannon to San Francisco (SNN-SFO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Shannon to San Francisco

Mon, 11 Jan - Mon, 18 Jan
British Airways Logo
20:05 - 14:55SNN  Shannon-SFO San Francisco
26h 50m1 stop London Heathrow
British Airways Logo
17:25 - 19:25SFO  San Francisco-SNN Shannon
18h 00m1 stop London Heathrow
£532British Airways
Thu, 8 Oct - Thu, 15 Oct
United Airlines Logo
12:30 - 21:25SNN  Shannon-SFO San Francisco
16h 55m2 stops Newark Las Vegas Harry Reid Intl
United Airlines Logo
06:00 - 10:15SFO  San Francisco-SNN Shannon
20h 15m1 stop Newark
£542United Airlines
Thu, 26 Nov - Sun, 29 Nov
British Airways Logo
17:30 - 14:55SNN  Shannon-SFO San Francisco
29h 25m1 stop London Heathrow
British Airways Logo
17:25 - 11:30SFO  San Francisco-SNN Shannon
34h 05m1 stop London Heathrow
£663British Airways
Thu, 26 Nov - Sun, 29 Nov
British Airways Logo
17:30 - 14:55SNN  Shannon-SFO San Francisco
29h 25m1 stop London Heathrow
British Airways Logo
17:25 - 11:30SFO  San Francisco-SNN Shannon
34h 05m1 stop London Heathrow
£664British Airways
Thu, 26 Nov - Sun, 29 Nov
British Airways Logo
17:30 - 14:55SNN  Shannon-SFO San Francisco
29h 25m1 stop London Heathrow
British Airways Logo
17:25 - 11:30SFO  San Francisco-SNN Shannon
34h 05m1 stop London Heathrow
£665British Airways
Mon, 19 Oct - Sat, 24 Oct
British Airways Logo
21:15 - 13:50SNN  Shannon-SFO San Francisco
24h 35m1 stop London Heathrow
British Airways Logo
21:35 - 19:25SFO  San Francisco-SNN Shannon
14h 50m1 stop London Heathrow
£687British Airways
Thu, 26 Nov - Sun, 29 Nov
British Airways Logo
07:50 - 18:21SNN  Shannon-SFO San Francisco
18h 31m2 stops London Heathrow Chicago O'Hare Intl
British Airways Logo
20:35 - 11:30SFO  San Francisco-SNN Shannon
30h 55m1 stop London Heathrow
£700British Airways
Wed, 21 Oct - Wed, 28 Oct
JetBlue Logo
13:45 - 01:05SNN  Shannon-SFO San Francisco
19h 20m1 stop Boston Logan Intl
JetBlue Logo
06:00 - 06:10SFO  San Francisco-SNN Shannon
17h 10m1 stop New York John F Kennedy Intl
£1,381JetBlue
Wed, 23 Sep - Wed, 30 Sep
Multiple Airlines Logo
07:30 - 13:50SNN  Shannon-SFO San Francisco
14h 20m1 stop London Heathrow
Multiple Airlines Logo
06:00 - 06:00SFO  San Francisco-SNN Shannon
16h 00m1 stop New York John F Kennedy Intl
£4,197Multiple Airlines
Booking Insights

Price, demand, and travel trends for Shannon to San Francisco flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Shannon to San Francisco with more confidence.

How much is a return flight from Shannon to San Francisco?

Return flights from Shannon to San Francisco start at £532. Prices are typical for this route right now, with typical return fares ranging from £524 to £717. The lowest price found in the past 5 days was £532 on British Airways.

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Key details for Shannon to San Francisco flights

Low season

December

When to book flights from Shannon to San Francisco

Are your dates flexible? Find out the best times to travel from Shannon to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Shannon to San Francisco flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Shannon to San Francisco?

    Flights from Shannon to San Francisco usually depart from Shannon (SNN) and arrive at San Francisco (SFO).

  • Which airports do connecting flights from Shannon to San Francisco pass through?

    One-stop flights from Shannon to San Francisco most commonly connect through:

    • London Heathrow (LHR) – 53% of one-stop connections
    • New York John F Kennedy Intl (JFK) – 25% of one-stop connections
    • Newark (EWR) – 10% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 10% of one-stop connections

    London Heathrow (LHR) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Shannon to San Francisco?

    Yes. Being flexible with your travel dates can save you up to 41% on the Shannon to San Francisco route. Wednesday is the cheapest departure day at £519 return on average, while Monday is the most expensive at £872, a difference of £353. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in San Francisco?

    Some of the most popular sights in San Francisco are Union Square, Fisherman's Wharf, and Moscone Center. These are among the most viewed places in San Francisco on KAYAK.

  • How long is a flight from Shannon to San Francisco?

    A direct flight from Shannon to San Francisco takes 0h 00m, covering 5,032 miles.

  • Do I need a passport to fly from Shannon to San Francisco?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Shannon to San Francisco changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £532 to £4,197. That means the highest observed fare was about 8x higher than the lowest one.

  • How much time can I save by choosing a different stopover airport from Shannon to San Francisco?

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time of 14h 17m, compared to 15h 07m via Chicago O'Hare Intl (ORD) and 15h 39m via Boston Logan Intl (BOS).

  • What is the time difference between Shannon and San Francisco?

    San Francisco is 8 hours behind Shannon (Pacific Time vs Irish Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which car hire options are available at San Francisco Airport (SFO)?

    San Francisco Airport (SFO) hosts 5 major car hire companies, with daily rates starting from around £11 for economy cars. Top options include:
    • Thrifty
    • Europcar
    • Dollar
    • Hertz
    • Fox

  • How much should I expect to pay for a Shannon to San Francisco flight?

    Return flights from Shannon to San Francisco range from £524 to £717, with an average of £584 over the past 12 months. Anything below £524 counts as a good deal.

Your guide to booking Shannon to San Francisco flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure instead of Monday. On this route, Wednesday flights average £519 – about £353 less than Monday (40% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Shannon to San Francisco trip for October. Fares historically average £519 return in that month – typically £246 less than the most expensive month, which is February (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to San Francisco Airport.
    - Grand Hyatt At Sfo

More options for your flight from Shannon to San Francisco

Complete your trip to San Francisco with a hotel stay or car hire

Car hire in San Francisco
Hotels in San Francisco
Holidays in San Francisco