Cheap Flights from Shannon to San Francisco International

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Compare Shannon to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

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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 Airport to San Francisco International Airport? If you want to travel next month, return fares start from $1,247. Find the lowest prices on one-way and return tickets right here.

San Francisco.$1,203 per passenger.Departing Sat, 26 Sep, returning Sat, 3 Oct.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Shannon on Sat, 26 Sep, arriving in San Francisco International.Inbound indirect flight with Lufthansa, departs from San Francisco International on Sat, 3 Oct, arriving in Shannon.Price includes taxes and charges.From $1,203, select.

San Francisco.$1,236 per passenger.Departing Wed, 23 Dec, returning Fri, 1 Jan.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Wed, 23 Dec, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Fri, 1 Jan, arriving in Shannon.Price includes taxes and charges.From $1,236, select.

San Francisco.$1,236 per passenger.Departing Wed, 17 Feb, returning Sun, 28 Feb.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Wed, 17 Feb, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Sun, 28 Feb, arriving in Shannon.Price includes taxes and charges.From $1,236, select.

San Francisco.$1,236 per passenger.Departing Tue, 22 Dec, returning Tue, 29 Dec.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Tue, 22 Dec, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Tue, 29 Dec, arriving in Shannon.Price includes taxes and charges.From $1,236, select.

San Francisco.$1,247 per passenger.Departing Tue, 13 Oct, returning Thu, 22 Oct.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Shannon on Tue, 13 Oct, arriving in San Francisco International.Inbound indirect flight with Lufthansa, departs from San Francisco International on Thu, 22 Oct, arriving in Shannon.Price includes taxes and charges.From $1,247, select.

San Francisco.$1,258 per passenger.Departing Sat, 19 Sep, returning Sat, 26 Sep.Return flight with United.Outbound indirect flight with United, departs from Shannon on Sat, 19 Sep, arriving in San Francisco International.Inbound indirect flight with United, departs from San Francisco International on Sat, 26 Sep, arriving in Shannon.Price includes taxes and charges.From $1,258, select.

San Francisco.$1,294 per passenger.Departing Thu, 18 Feb, returning Tue, 2 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Thu, 18 Feb, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Tue, 2 Mar, arriving in Shannon.Price includes taxes and charges.From $1,294, select.

San Francisco.$1,336 per passenger.Departing Sat, 17 Apr, returning Sun, 25 Apr.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Sat, 17 Apr, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Sun, 25 Apr, arriving in Shannon.Price includes taxes and charges.From $1,336, select.

San Francisco.$1,344 per passenger.Departing Mon, 8 Mar, returning Fri, 19 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Mon, 8 Mar, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Fri, 19 Mar, arriving in Shannon.Price includes taxes and charges.From $1,344, select.

San Francisco.$1,344 per passenger.Departing Tue, 9 Mar, returning Wed, 30 Jun.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Tue, 9 Mar, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Wed, 30 Jun, arriving in Shannon.Price includes taxes and charges.From $1,344, select.

San Francisco.$1,350 per passenger.Departing Sat, 7 Nov, returning Sat, 14 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Sat, 7 Nov, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Sat, 14 Nov, arriving in Shannon.Price includes taxes and charges.From $1,350, select.

San Francisco.$1,394 per passenger.Departing Mon, 24 May, returning Wed, 16 Jun.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Mon, 24 May, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Wed, 16 Jun, arriving in Shannon.Price includes taxes and charges.From $1,394, select.

San Francisco.$1,399 per passenger.Departing Wed, 28 Oct, returning Wed, 4 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Wed, 28 Oct, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Wed, 4 Nov, arriving in Shannon.Price includes taxes and charges.From $1,399, select.

San Francisco.$1,442 per passenger.Departing Fri, 30 Apr, returning Mon, 3 May.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Fri, 30 Apr, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Mon, 3 May, arriving in Shannon.Price includes taxes and charges.From $1,442, select.

San Francisco.$1,450 per passenger.Departing Fri, 19 Mar, returning Fri, 2 Apr.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Shannon on Fri, 19 Mar, arriving in San Francisco International.Inbound indirect flight with British Airways, departs from San Francisco International on Fri, 2 Apr, arriving in Shannon.Price includes taxes and charges.From $1,450, select.

San Francisco.$1,554 per passenger.Departing Thu, 24 Sep, returning Sun, 8 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Shannon on Thu, 24 Sep, arriving in San Francisco International.Inbound indirect flight with Air Canada, departs from San Francisco International on Sun, 8 Nov, arriving in Shannon.Price includes taxes and charges.From $1,554, 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 December.

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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	$1,203
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 $1,203. 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 $1,203.

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

As of September 2026, 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 Saturday, 26 September 2026.

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.

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

San Francisco is eight hours behind Shannon and is in the UTC-8 timezone.
For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to catch your SNN to SFO flight.
Be prepared for longer queues in popular months like June. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will give you ample time for security and boarding.
Consider adding a stopover when booking your ticket from Shannon Airport to San Francisco International Airport. Simply uncheck 'Direct flights only' to break up your trip, or perhaps see a new city along the way. Here's where you can stop between SNN and SFO:
- Chicago O'Hare International Airport
- London Heathrow Airport
- Boston Logan International Airport

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

$905 is the best price for a one-way Shannon Airport to San Francisco International Airport flight. A return flight starts at $1,203. These prices may change depending on availability.
Don't wait until the last moment. You're more likely to find cheap tickets from SNN to SFO if you book in advance. Airlines often have some great early bird deals.
Finding cheap flights from Shannon Airport to San Francisco International Airport is easier if you're flexible with your dates. Use the 'Whole month' function to see the best prices across every month and bag a great deal.
Finding cheap flights from SNN to SFO is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you as soon as a new discounted fare appears.
Secure the perfect flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Shannon Airport to San Francisco International Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about Shannon Airport (SNN)

Shannon Airport has a strong on-time performance, reducing your chances of a delayed flight. Departures from SNN touch down on schedule 84% of the time.
Shannon Airport is about 3 kilometres from central Shannon. If you're catching a taxi, ride-sharing or driving from the centre, it'll take you 5 minutes or so to get there, depending on the traffic.
Expect a journey time of roughly 15 minutes when using public transport.
Get your holiday off to a stress-free start by staying near SNN. Whether you're catching an early flight from Shannon Airport to San Francisco International Airport or want to avoid feeling rushed, these stays are ideal:

Arriving at San Francisco International Airport (SFO)

Consider booking a hotel close to SFO if you're catching a late Shannon Airport to San Francisco International Airport flight. Choose one of these accommodation options and avoid the hassle of a long transfer:
Go where the road takes you with a San Francisco International Airport rental car. Pick up your wheels from Dollar, Thrifty or Hertz and see more of San Francisco and beyond.
To secure the lowest price, reserve your ride from San Francisco International Airport around one week ahead.

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

San Francisco International Airport to central San Francisco has a drive time of about 25 minutes. It's approximately 21 kilometres away.
It typically takes 35 minutes when travelling by public transport.

When to fly to San Francisco International Airport (SFO)

The quietest month for a flight from Shannon Airport to San Francisco International Airport is March, while July is the busiest. Choose the ideal time to go to San Francisco based on whether you prefer a more fast-paced or easygoing experience.
The warmest month in San Francisco is September, with temperatures ranging between 12ºC and 24ºC. Lock in your flights from Shannon Airport to San Francisco International Airport in this month if you like this kind of weather.
January sees average temperatures of between 5ºC and 16ºC. Look for cheap tickets from SNN to SFO sometime around then if you like cooler conditions.

Explore more of the United States

San Francisco has plenty to offer, but there are so many other parts of the United States just waiting to be explored. About 64 kilometres south-east of San Francisco, a visit to San Jose will keep your itinerary packed. Start with popular sights like Winchester Mystery House, The Tech Interactive and Santa Clara Valley.
Around 257 kilometres south-east of San Francisco, Fresno is another essential stop in the United States. Experience major highlights starting with Forestiere Underground Gardens, Shinzen Japanese Garden and Fresno Chaffee Zoo.