$701 Cheap Flights from Donegal (CFN) to San Francisco (SFO)

View $701 flight on Mon, Oct 20, 2025Opens in a new window

Popular airlines from Donegal (CFN) to San Francisco Intl. Airport (SFO)

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Cheap Flights from Donegal to San Francisco (CFN-SFO)

Prices were available within the past 7 days and start at $701 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Donegal (CFN) to San Francisco (SFO)
Origin airport
Donegal
Destination airport
San Francisco Intl.
Distance
4948 mi

Donegal to San Francisco Flights

The cheapest times to fly from Donegal to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Donegal to San Francisco are during the month of . You can find some of the cheapest flights from Donegal to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Donegal to San Francisco

Sunday is one of the best days to book for cheap flights from Donegal to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Donegal to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Donegal to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $701 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Donegal to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Donegal to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much is a flight from Donegal Airport to SFO?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price quoted for a round-trip flight between Donegal Airport and San Francisco Intl. Airport (SFO) was . Cheap fares don't hang around, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Donegal Airport (CFN) to SFO?
Most flights can be conveniently canceled online, but whether you are charged a fee depends on your airline. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Donegal Airport to San Francisco Airport that have flexible change policies?
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 Donegal Airport (CFN) to San Francisco Intl. Airport (SFO) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from Donegal Airport to SFO?
Averaging 12 hours and 5 minutes, the flight from Donegal Airport (CFN) to San Francisco Intl. Airport (SFO) is a long one. To make your in-flight experience more comfortable, remember to pack a good neck pillow and a set of noise-canceling earplugs.
How far is the flight from CFN to SFO?
You'll have 4972 mi to cover on the long-haul Braade to San Francisco route. Dress in layers of comfortable clothes and consider taking earplugs and a sleep mask.
Which airlines fly direct from Donegal Airport (CFN) to San Francisco Intl. Airport (SFO)?
You won't find any airlines operating directly between CFN and San Francisco Airport, so be ready to make at least one stop on your journey. A layover, whether short or long, can be a good way to break up a trip!
Are CFN to San Francisco Intl. Airport (SFO) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes nab a bargain, with some super cheap airfares from CFN to San Francisco Intl. Airport (SFO) surfacing a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all 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 release prices so far in advance.

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