£349 Cheap Flights from Shannon (SNN) to San Francisco (SFO)

Start packing your suitcase, because round-trip flights between Shannon Airport (SNN) and San Francisco Airport start from £525. That's based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can move quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply.

Most flights can be cancelled online, but every airline has a different set of terms and conditions. If you do need to cancel your flight, check out our Customer Service Portal and follow the instructions.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Shannon Airport (SNN) to San Francisco Airport flights, you'll see a "no change fees" filter for you to select.

Make the 12 hours and 36 minutes between Shannon Airport (SNN) and SFO (SFO) as comfortable as you can. Bring the essentials, like toiletries, your toothbrush and a neck pillow, and sit back and enjoy the flight!

You'll have 8,100 kilometres to cover on the long-haul Shannon to San Francisco route. Wear comfy clothes and consider taking earplugs and a sleep mask.

There are no direct flights, so you'll need to make at least one stop between SNN and San Francisco Intl. Airport (SFO). Take advantage of the layover time to stretch your legs and take a break.

Last-minute planners can sometimes pick up a bargain, with some of the cheapest fares from Shannon Airport to San Francisco Intl. Airport (SFO) cropping up a few weeks before the date of departure. If you'd rather book ahead, Expedia compares and updates the best flight deals frequently — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines issue prices that far in advance.