684 € Cheap Flights from San Francisco International to Shannon

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Flight deals from San Francisco International to Shannon

Looking for a cheap last-minute deal or the best return flight from San Francisco International Airport to Shannon Airport? If you want to travel next month, return fares start from 747 €. Find the lowest prices on one-way and return tickets right here.

Shannon.684 € per passenger.Departing Mon, 17 Aug, returning Tue, 1 Sep.Return flight with Frontier Airlines and Ryanair.Outbound indirect flight with Frontier Airlines, departs from San Francisco International on Mon, 17 Aug, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Tue, 1 Sep, arriving in San Francisco International.Price includes taxes and charges.From 684 €, select.

Shannon.722 € per passenger.Departing Thu, 10 Sep, returning Sun, 20 Sep.Return flight with WestJet and Ryanair.Outbound indirect flight with WestJet, departs from San Francisco International on Thu, 10 Sep, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Sun, 20 Sep, arriving in San Francisco International.Price includes taxes and charges.From 722 €, select.

Shannon.745 € per passenger.Departing Mon, 2 Nov, returning Thu, 12 Nov.Return flight with Aer Lingus and Ryanair.Outbound indirect flight with Aer Lingus, departs from San Francisco International on Mon, 2 Nov, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Thu, 12 Nov, arriving in San Francisco International.Price includes taxes and charges.From 745 €, select.

Shannon.747 € per passenger.Departing Tue, 18 Aug, returning Mon, 24 Aug.Return flight with United.Outbound indirect flight with United, departs from San Francisco International on Tue, 18 Aug, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Mon, 24 Aug, arriving in San Francisco International.Price includes taxes and charges.From 747 €, select.

Shannon.752 € per passenger.Departing Mon, 15 Feb, returning Sun, 7 Mar.Return flight with Air France and Ryanair.Outbound indirect flight with Air France, departs from San Francisco International on Mon, 15 Feb, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Sun, 7 Mar, arriving in San Francisco International.Price includes taxes and charges.From 752 €, select.

Shannon.769 € per passenger.Departing Thu, 24 Sep, returning Sun, 4 Oct.Return flight with WestJet and Aer Lingus.Outbound indirect flight with WestJet, departs from San Francisco International on Thu, 24 Sep, arriving in Shannon.Inbound indirect flight with Aer Lingus, departs from Shannon on Sun, 4 Oct, arriving in San Francisco International.Price includes taxes and charges.From 769 €, select.

Shannon.797 € per passenger.Departing Fri, 30 Oct, returning Thu, 12 Nov.Return flight with Frontier Airlines and Aer Lingus.Outbound indirect flight with Frontier Airlines, departs from San Francisco International on Fri, 30 Oct, arriving in Shannon.Inbound indirect flight with Aer Lingus, departs from Shannon on Thu, 12 Nov, arriving in San Francisco International.Price includes taxes and charges.From 797 €, select.

Shannon.841 € per passenger.Departing Wed, 2 Jun, returning Wed, 16 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Wed, 2 Jun, arriving in Shannon.Inbound indirect flight with Delta, departs from Shannon on Wed, 16 Jun, arriving in San Francisco International.Price includes taxes and charges.From 841 €, select.

Shannon.842 € per passenger.Departing Mon, 28 Sep, returning Mon, 28 Dec.Return flight with Frontier Airlines and Aer Lingus.Outbound indirect flight with Frontier Airlines, departs from San Francisco International on Mon, 28 Sep, arriving in Shannon.Inbound indirect flight with Aer Lingus, departs from Shannon on Mon, 28 Dec, arriving in San Francisco International.Price includes taxes and charges.From 842 €, select.

Shannon.862 € per passenger.Departing Wed, 9 Dec, returning Wed, 6 Jan.Return flight with Lufthansa and Ryanair.Outbound indirect flight with Lufthansa, departs from San Francisco International on Wed, 9 Dec, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Wed, 6 Jan, arriving in San Francisco International.Price includes taxes and charges.From 862 €, select.

Shannon.910 € per passenger.Departing Tue, 28 Jul, returning Tue, 4 Aug.Return flight with KLM.Outbound indirect flight with KLM, departs from San Francisco International on Tue, 28 Jul, arriving in Shannon.Inbound indirect flight with KLM, departs from Shannon on Tue, 4 Aug, arriving in San Francisco International.Price includes taxes and charges.From 910 €, select.

Shannon.914 € per passenger.Departing Sun, 23 May, returning Sun, 6 Jun.Return flight with Air France and Ryanair.Outbound indirect flight with Air France, departs from San Francisco International on Sun, 23 May, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Sun, 6 Jun, arriving in San Francisco International.Price includes taxes and charges.From 914 €, select.

Shannon.1.020 € per passenger.Departing Tue, 22 Dec, returning Mon, 28 Dec.Return flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from San Francisco International on Tue, 22 Dec, arriving in Shannon.Inbound indirect flight with Aer Lingus, departs from Shannon on Mon, 28 Dec, arriving in San Francisco International.Price includes taxes and charges.From 1.020 €, select.

Shannon.1.166 € per passenger.Departing Sat, 25 Jul, returning Fri, 31 Jul.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from San Francisco International on Sat, 25 Jul, arriving in Shannon.Inbound indirect flight with Air France, departs from Shannon on Fri, 31 Jul, arriving in San Francisco International.Price includes taxes and charges.From 1.166 €, select.

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

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

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San Francisco International to Shannon: Alternative routes

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

San Francisco to Shannon: Flight information

The things to know before you go.

Cheapest flight found	684 €
Cheapest month to fly	August

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

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

The best price we found for a return flight from San Francisco International to Shannon is 684 €. 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 San Francisco International to Shannon?

Currently, there are no airlines that fly direct from San Francisco International to Shannon. But we found flights with one or more stops from 684 €.

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

As of July 2026, there are no flights flying from San Francisco International to Shannon.

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

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

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

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Shannon Airport on Monday, 17 August 2026.

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

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

How can I find the best flight deal to Shannon?

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 Shannon 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 Shannon?

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

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

Currently, Frontier Airlines offers the cheapest flight tickets to Shannon.

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

Shannon is eight hours ahead of San Francisco and is in the UTC+0 timezone.
Get to the airport on time so you don't miss your SFO to SNN flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.
Flying during a peak month such as July? Major public holidays and other popular seasons can mean longer lines at check-in and security. Play things extra safe and arrive up to four hours ahead of 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 San Francisco International Airport to Shannon Airport, deselect 'Direct flights only.' Then, choose a flight offering a stop long enough to visit your chosen city. Popular stopovers between SFO and SNN include:
- Chicago O'Hare International Airport
- London Heathrow Airport
- New York John F. Kennedy Airport

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

305 € is currently the best price for a one-way San Francisco International Airport to Shannon Airport flight. Return flights start from 684 €. These fares can change based on availability.
It's a good idea to book as early as possible if you want to get cheap tickets from SFO to SNN. That's because airlines change prices based on demand, which tends to rise closer to departure.
Finding cheap flights from San Francisco International Airport to Shannon Airport is easier if you're flexible with your travel dates. Use the 'Whole month' search tool to see the lowest fares across each month and bag a great deal.
Cut down on the time spent looking for cheap flights from SFO to SNN by setting up a Price Alert. You'll receive an email or push notification on the app when a special offer becomes available.
Find the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from San Francisco International Airport to Shannon Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about San Francisco International Airport (SFO)

Of all flights leaving San Francisco International Airport, 78% touch down on time at their destination.
To reach San Francisco International Airport from central San Francisco, it'll take around 25 minutes if you're travelling by car. Of course, this depends on traffic conditions. It's approximately 21 kilometres from the airport to the city centre.
Taking public transport? Expect a trip time of around 35 minutes.
Get your holiday off to a leisurely start by staying near SFO. Whether you're boarding an early flight from San Francisco International Airport to Shannon Airport or just don't want to be rushed, these hotels are the answer:

Arriving at Shannon Airport (SNN)

The last thing you want is a long trip to your hotel if you're getting in late on a San Francisco International Airport to Shannon Airport flight. Book one of these accommodation options near SNN instead:
Get on the fast track to adventure by picking up a Shannon Airport rental car. Grab your wheels from Easirent, Budget or Carhire to explore Shannon and beyond.
Lock in the best rate by booking your vehicle from Shannon Airport about four weeks before your trip.

When to fly to Shannon Airport (SNN)

The quietest month for a flight from San Francisco International Airport to Shannon Airport is February, while June is the busiest. Pick the ideal time to visit Shannon based on whether you prefer a faster pace or a more relaxed vibe.
Lock in your flight from San Francisco International Airport to Shannon Airport for July if you want to go to Shannon during its warmest month. Expect temperatures of between 9ºC (48ºF) and 22ºC (72ºF).
Search for cheap tickets from SFO to SNN in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 0ºC (32ºF) and 9ºC (48ºF) on average.

Explore more of Ireland

Dublin is just one of the many places in Ireland waiting to be explored once you've seen Shannon. Around 193 kilometres away to the north-east, popular attractions include Guinness Storehouse, Trinity College Library and St. Patrick's Cathedral.
Cork is another standout destination in Ireland and is around 97 kilometres south of Shannon. No trip is complete without seeing Blarney Castle & Gardens, Blarney Castle House(Teach Caisleán na Blarnan) and Blarney Stone.