Cheap flights from Ireland to San Francisco from £328

The month of January is, on average, the cheapest month to fly to San Francisco from Ireland, with most prices found around £405. If you are unable to visit San Francisco during the month of January, then departing from Ireland during the month November is also very affordable. Most momondo users find prices during this month for around £424.

The cheapest day to depart on your flight to San Francisco is on a Monday when prices can be found for as low as £453. This is often the case because there is less demand to fly during this day of the week. Flights from Ireland to San Francisco on a Sunday will generally be more expensive and average around £847. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to San Francisco is in the morning. Flights from Ireland to San Francisco during this time can be as low as £511. Try not to purchase tickets at midday because they tend to be around £580. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Dublin to San Francisco for the best Ireland - San Francisco flight prices

You are more likely to see cheaper flights to San Francisco from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £522 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Ireland for as low as £453 on momondo.

There are 3 cabin classes available to choose from on Ireland to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

JetBlue is the most popular carrier operating from Ireland to San Francisco

Aer Lingus, United Airlines and Air Canada are the top three most popular airlines that fly to San Francisco from Ireland according to our data. Aer Lingus is the first choice among our users, with 76% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 10 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Historically, on average around 11% of flights between Ireland and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

As of March 2026, 2 flights take off from Ireland and land in San Francisco each day. The most common flight departure time for this route is 12:00, with 100% of daily flights taking off in the afternoon.

As of March 2026, there are 16 flights per week flying from Ireland to San Francisco. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.