$1,031 Cheap Flights from Shannon (SNN) to San Francisco International (SFO) in 2025

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Flight deals from Shannon to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Shannon to San Francisco International? Find the lowest prices on one-way and return tickets right here.

San Francisco.$1,031 per passenger.Departing Thu, 11 Sep, returning Mon, 22 Sep.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Shannon on Thu, 11 Sep, arriving in San Francisco International.Inbound indirect flight with Lufthansa, departs from San Francisco International on Mon, 22 Sep, arriving in Shannon.Price includes taxes and charges.From $1,031, select.

San Francisco.$1,041 per passenger.Departing Thu, 28 Aug, returning Sat, 6 Sep.Return flight with United.Outbound indirect flight with United, departs from Shannon on Thu, 28 Aug, arriving in San Francisco International.Inbound indirect flight with United, departs from San Francisco International on Sat, 6 Sep, arriving in Shannon.Price includes taxes and charges.From $1,041, select.

San Francisco.$1,117 per passenger.Departing Mon, 20 Oct, returning Fri, 7 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Mon, 20 Oct, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Fri, 7 Nov, arriving in Shannon.Price includes taxes and charges.From $1,117, select.

San Francisco.$1,117 per passenger.Departing Mon, 25 Aug, returning Sun, 31 Aug.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Mon, 25 Aug, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Sun, 31 Aug, arriving in Shannon.Price includes taxes and charges.From $1,117, select.

San Francisco.$1,210 per passenger.Departing Sat, 26 Jul, returning Sat, 2 Aug.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Shannon on Sat, 26 Jul, arriving in San Francisco International.Inbound indirect flight with Lufthansa, departs from San Francisco International on Sat, 2 Aug, arriving in Shannon.Price includes taxes and charges.From $1,210, select.

San Francisco.$1,210 per passenger.Departing Sat, 12 Jul, returning Sun, 20 Jul.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Shannon on Sat, 12 Jul, arriving in San Francisco International.Inbound indirect flight with Lufthansa, departs from San Francisco International on Sun, 20 Jul, arriving in Shannon.Price includes taxes and charges.From $1,210, select.

San Francisco.$1,386 per passenger.Departing Wed, 8 Apr, returning Sun, 12 Apr.Return flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from Shannon on Wed, 8 Apr, arriving in San Francisco International.Inbound indirect flight with Aer Lingus, departs from San Francisco International on Sun, 12 Apr, arriving in Shannon.Price includes taxes and charges.From $1,386, select.

Find the cheapest month to fly from Shannon to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Shannon to San Francisco International flights are currently cheapest in September.

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Shannon to San Francisco International: Alternative routes

Compare routes from Shannon to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Shannon to San Francisco: Flight information

The things to know before you go.

Cheapest flight found	$1,031
Cheapest month to fly	September

Finding cheap flights from Shannon to San Francisco International: Frequently asked questions

How much are return flights from Shannon to San Francisco International?

The best price we found for a return flight from Shannon to San Francisco International is $1,031. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Shannon to San Francisco International?

Currently, there are no airlines that fly direct from Shannon to San Francisco International. But we found flights with one or more stops from $1,031.

How many flights are there a week from Shannon to San Francisco International?

As of July 2025, there are no flights flying from Shannon to San Francisco International.

When is the cheapest time to fly from Shannon to San Francisco International?

The cheapest month to fly from Shannon to San Francisco International is usually September.

Which upcoming date is cheapest to fly from Shannon Airport to San Francisco International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Shannon Airport to San Francisco International Airport on Thursday, 11 September 2025.

Can I get a direct flight from Shannon Airport to San Francisco International Airport?

No airlines currently offer direct flights between Shannon Airport and San Francisco International Airport. Most routes have one or more stops.

How can I find the best flight deal to San Francisco International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to San Francisco?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Shannon Airport to San Francisco International with?

Currently, Lufthansa offers the cheapest flight tickets to San Francisco International.

Travelling from Shannon Airport (SNN) to San Francisco International Airport (SFO): what you need to know

The timezone in San Francisco is UTC-7, which is seven hours behind Shannon.
To ensure you get on your SNN to SFO flight, leave plenty of time to check in and drop off your luggage. Arriving two hours before international departures and an hour before domestic flights is the standard rule.
Travelling during a peak time such as August? School holidays and other popular periods can result in longer lines at check-in and security. Play it safe and arrive up to four hours before an international flight and two hours before domestic departures.
We make it a piece of cake to book a flight with a stopover. To see your options for tickets from Shannon Airport to San Francisco International Airport, deselect 'Direct flights only.' Then, choose a flight that has a stop long enough to visit your chosen city. Worthwhile stopovers between SNN and SFO include:
- London Heathrow Airport
- O'Hare International Airport
- Logan International Airport

How to find the cheapest flights from Shannon Airport (SNN) to San Francisco International Airport (SFO)

$1,074 is the best price for a one-way Shannon Airport to San Francisco International Airport flight. A return flight starts at $1,031. These fares can change based on demand and availability.
It's a good idea to book as early as possible if you want to get cheap tickets from SNN to SFO. That's because flight prices are based on demand, which tends to rise closer to the date of departure.
If you can be flexible with your travel plans, try using the 'Whole month' search tool. It'll show you the cheapest price in every month when looking for your flight from Shannon Airport to San Francisco International Airport.
Cut down on the time spent looking for cheap flights from SNN to SFO by creating a Price Alert. You'll get an email or notification through the app when a lower fare pops up.
Tailor your trip using filters. Choose your preferred departure and arrival times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Best' or 'Fastest' flights from Shannon Airport to San Francisco International Airport.

Handy information about Shannon Airport (SNN)

When it comes to Shannon Airport's on-time performance, 66.14% of flights arrive within the expected timeframe.
Central Shannon to Shannon Airport is around 5 kilometres. Depending on traffic, it'll take you about 5 minutes to get there if you're ride-sharing, catching a cab or driving.
You can expect a trip time of about 10 minutes when using public transport.
Need a convenient hotel close to SNN? If you've booked an early flight from Shannon Airport to San Francisco International Airport, these stays will have you moments from your departure gate:

Arriving at San Francisco International Airport (SFO)

Reserve a hotel near SFO if you're on a late Shannon Airport to San Francisco International Airport flight. Settle into one of these options and skip the long transfer after landing:
Get your adventure underway by picking up a San Francisco International Airport rental car. Grab your wheels from Dollar, Thrifty or Hertz and explore beyond San Francisco's usual tourist stops.
Booking your ride from San Francisco International Airport about one week in advance boosts your odds of scoring a great price.

Getting from San Francisco International Airport (SFO) to central San Francisco

San Francisco International Airport is roughly 21 kilometres from the centre of San Francisco. The drive time takes around 20 minutes.
It typically takes 45 minutes to get there by public transport.

When to fly to San Francisco International Airport (SFO)

August is the busiest month for flights from Shannon Airport to San Francisco International Airport. To skip the crowds, travel to San Francisco in February.
When reserving your flight from Shannon Airport to San Francisco International Airport, consider the kind of weather you like. September is the warmest month in San Francisco, with the temperature ranging from 12ºC (54ºF) to 22ºC (72ºF).
January sees average temperatures of between 6ºC (43ºF) and 16ºC (61ºF). Look for cheap tickets from SNN to SFO around that time if you want to travel in cooler conditions.

Explore more of United States

San Jose is just one of the many cities in United States waiting to be explored after you've experienced San Francisco. Around 64 kilometres away to the south-east, its best attractions include Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.
Around 257 kilometres south-east of San Francisco, Fresno is another essential stop in United States. Experience the best of this destination with a visit to Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden.