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Cheap flights from San Francisco to Donegal from $2,436

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Donegal departing on 9/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from San Francisco to Donegal

Cheap round-trip flights

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SFO
-
CFN
4944 mimulti-stop
Multiple Airlines Logo
CFN
-
SFO
4944 mimulti-stop
Multiple Airlines

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Customize your flight search to find flights from San Francisco to Donegal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 16, 2026.
Use the filters below to find and compare flights from San Francisco to Donegal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Thu 9/3

6:00 am-2:00 pm

3 stops48h 00m

$2,436

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Thu 9/3

10:33 pm-2:00 pm

2 stops31h 27m

$3,092
Quickest one-way

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Thu 9/3

5:35 pm-2:00 pm

1 stop12h 25m

$4,907

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Donegal from

How to get the cheapest flight ticket from San Francisco to Donegal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from San Francisco to Donegal?

Aer Lingus is the most popular carrier operating from San Francisco to Donegal

When to book flights from San Francisco to Donegal

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Donegal according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Donegal (SFO to CFN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Donegal

Fastest flight time

30h 00m

Direct flights

None
The fastest flight from San Francisco to Donegal takes 30h 00m
There are no direct flights from San Francisco to Donegal. There are no popular flight routes from San Francisco to Donegal.
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Frequently asked questions about flying from San Francisco to Donegal

  • How far is San Francisco to Donegal by plane?

    The straight-line distance from San Francisco to Donegal is 4960.4 mi. Flights usually cover this in 30h 00m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from San Francisco Airport to Donegal Airport?

    Prices for flights from San Francisco Airport to Donegal Airport are updated daily.

  • How old do you have to be to fly from San Francisco Airport to Donegal Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Donegal Airport.

  • What documentation or ID do you need to fly to Donegal Airport?

    The travel and health documents required for your trip to Donegal Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Donegal Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Donegal?

Book flights to Donegal if you plan to visit one of these locations
Letterkenny
Killybegs

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Donegal?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Donegal from San Francisco.

Can I find flights from San Francisco to Donegal with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Donegal from San Francisco with this policy.

How can momondo help me find flights from San Francisco to Donegal?

Once all potential San Francisco to Donegal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Francisco to Donegal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Donegal, momondo offers a useful price alert feature which will track prices for flights to Donegal from San Francisco and alert you when they change.

An easier way to manage your Donegal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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