SFO - SNN

$360 Find Cheap Flights from San Francisco to Shannon - Compare and Save

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Everything you should know

Cheapest round-trip
$624
Typical prices: $845-$1,179
United Airlines
Fri 9/28Sat 10/13
SFO - SNN • 2 stops
Cheapest one-way
$360
Typical prices: $482-$613
Multiple Airlines
Thu 10/11
SFO - SNN • 3 stops
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Shannon. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
December
Cheapest • 37% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
London Heathrow (LHR)
Cheapest • Avg $917 (round-trip)
Newark (EWR)
Shortest trip • 14h 35m (one-way)
Insights
Insights
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Booking Insights
Flight Deals

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

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

Recent round-trip flight deals from San Francisco to Shannon

Mon, Sep 28 - Tue, Oct 13
United Airlines Logo
6:45 am - 10:15 amSFO  San Francisco-SNN Shannon
19h 30m2 stops Washington, D.C. Dulles Intl Newark
United Airlines Logo
12:30 pm - 6:41 amSNN  Shannon-SFO San Francisco
26h 11m2 stops Newark Denver Intl
$624United Airlines
Mon, Sep 28 - Tue, Oct 13
United Airlines Logo
8:15 am - 10:15 amSFO  San Francisco-SNN Shannon
18h 00m2 stops Boston Logan Intl Newark
United Airlines Logo
12:30 pm - 10:52 pmSNN  Shannon-SFO San Francisco
18h 22m2 stops Newark Los Angeles
$624United Airlines
Mon, Oct 26 - Mon, Nov 2
Aer Lingus Logo
6:20 pm - 7:25 pmSFO  San Francisco-SNN Shannon
18h 05m2 stops Dublin London Heathrow
Aer Lingus Logo
8:05 pm - 3:35 pmSNN  Shannon-SFO San Francisco
27h 30m2 stops London Heathrow Dublin
$786Aer Lingus
Tue, Jan 19 - Tue, Jan 26
Aer Lingus Logo
5:25 pm - 7:25 pmSFO  San Francisco-SNN Shannon
18h 00m1 stop London Heathrow
Aer Lingus Logo
8:05 pm - 3:35 pmSNN  Shannon-SFO San Francisco
27h 30m2 stops London Heathrow Dublin
$789Aer Lingus
Tue, Jan 19 - Tue, Jan 26
British Airways Logo
5:25 pm - 7:25 pmSFO  San Francisco-SNN Shannon
18h 00m1 stop London Heathrow
British Airways Logo
7:50 am - 2:55 pmSNN  Shannon-SFO San Francisco
15h 05m1 stop London Heathrow
$798British Airways
Mon, Oct 26 - Mon, Nov 2
British Airways Logo
6:25 pm - 4:45 pmSFO  San Francisco-SNN Shannon
15h 20m1 stop London Heathrow
British Airways Logo
8:05 pm - 2:55 pmSNN  Shannon-SFO San Francisco
26h 50m1 stop London Heathrow
$803British Airways
Sun, Oct 25 - Sun, Nov 1
American Airlines Logo
6:00 am - 5:50 amSFO  San Francisco-SNN Shannon
16h 50m2 stops Philadelphia Boston Logan Intl
American Airlines Logo
7:50 am - 3:55 pmSNN  Shannon-SFO San Francisco
15h 05m1 stop London Heathrow
$875American Airlines
Sat, Oct 3 - Sat, Oct 17
Lufthansa Logo
10:50 pm - 10:15 amSFO  San Francisco-SNN Shannon
27h 25m2 stops Los Angeles Newark
Lufthansa Logo
7:30 am - 10:20 amSNN  Shannon-SFO San Francisco
34h 50m2 stops London Heathrow Vancouver Intl
$1,007Lufthansa
Fri, Sep 25 - Sat, Oct 17
American Airlines Logo
9:23 pm - 6:00 amSFO  San Francisco-SNN Shannon
24h 37m1 stop New York John F Kennedy Intl
American Airlines Logo
2:30 pm - 1:12 amSNN  Shannon-SFO San Francisco
18h 42m1 stop New York John F Kennedy Intl
$1,041American Airlines
Sat, Oct 10 - Wed, Oct 21
Lufthansa Logo
1:05 pm - 10:15 amSFO  San Francisco-SNN Shannon
13h 10m1 stop Newark
Lufthansa Logo
12:30 pm - 9:14 amSNN  Shannon-SFO San Francisco
28h 44m1 stop Newark
$5,733Lufthansa
Booking Insights

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

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

How much is a round-trip flight from San Francisco to Shannon?

Round-trip flights from San Francisco to Shannon start at $624. Prices are below average for this route right now, with typical round-trip fares ranging from $845 to $1,179. The lowest price found in the past 5 days was $624 on United Airlines.

What's the cheapest day of the week to fly from San Francisco to Shannon?

Wednesday is the cheapest day of the week to fly from San Francisco to Shannon, it is 19% cheaper than the average day. Sunday is the most expensive day with flight prices 10% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from San Francisco to Shannon?

  • December is the cheapest month to fly from San Francisco to Shannon at $627 round-trip.
  • November ($1,835) and June ($1,173) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 192% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for San Francisco to Shannon flights

Low season

January

Cheapest flight

$360
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from San Francisco to Shannon

When to book flights from San Francisco to Shannon

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

Your San Francisco to Shannon 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 San Francisco to Shannon?

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

  • What cabin classes can I book on flights from San Francisco to Shannon?

    Two cabin classes are available on flights from San Francisco to Shannon:

    • Economy Class
    • Business Class

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

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

    • New York John F Kennedy Intl (JFK) - 37% of one-stop connections
    • London Heathrow (LHR) - 23% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 20% of one-stop connections
    • Newark (EWR) - 14% of one-stop connections

    New York John F Kennedy Intl (JFK) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 27% on the San Francisco to Shannon route. Wednesday is the cheapest departure day at $813 round-trip on average, while Sunday is the most expensive at $1,107, a difference of $294. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

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

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

    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.

  • How are flight prices from San Francisco to Shannon looking right now?

    One-way fares from San Francisco to Shannon are currently higher than usual. Average one-way flight prices are about $2,524, which is 382% above the typical average for this route.

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

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 14h 35m, compared with 14h 53m via Chicago O'Hare Intl (ORD) and 15h 23m via London Heathrow (LHR).

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

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

  • What car rental options are available at Shannon Airport (SNN)?

    Shannon Airport (SNN) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
    • Budget
    • Sixt
    • Europcar
    • Thrifty
    • Easirent

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

    Round-trip flights from San Francisco to Shannon range from $845 to $1,179, with an average of $1,002 over the past 12 months. Anything below $845 counts as a good deal.

Your guide to booking San Francisco to Shannon flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average $813 - about $294 less than Sunday (27% savings) based on the last 12 months.
  • If you can choose when to travel, plan your San Francisco to Shannon trip for December. Fares historically average $627 round-trip in that month - typically $1,208 less than the most expensive month, which is November (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Shannon Airport.
    - Park Inn by Radisson Shannon Airport
    - Treacys Oakwood Hotel

More options for your flight from San Francisco to Shannon

Complete your trip to Shannon with a hotel stay or car rental

Car rentals in Shannon
Hotels in Shannon