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Cheap flights from California to Donegal from $1,887

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from California to Donegal departing on 8/31. 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 California to Donegal

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
7:30 pm - 2:00 pm
SFO
-
CFN
34h 30m
2 stops
British Airways Logo
2:30 pm - 5:40 pm
CFN
-
SFO
35h 10m
2 stops
$1,887British Airways
Mon, Aug 31 - Fri, Sep 4

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Customize your flight search to find flights from California 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 30, 2026.
Use the filters below to find and compare flights from California to Donegal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Mon 8/31

7:30 pm-2:00 pm

2 stops34h 30m

Donegal

Fri 9/4

2:30 pm-5:40 pm

2 stops35h 10m

$1,887

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 California 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

How long does it take to fly to Donegal?

Flight times vary depending on what airport in California you fly out of and what airport in Donegal you fly into. For example, flying from San Francisco to Knock takes 24h 45m on average. On the other hand, flying from San Jose to Knock takes 43h 50m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

Cheap California to Donegal flight deals and tips

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

Fastest flight time

34h 30m

Direct flights

None
The fastest flight from California to Donegal takes 34h 30m
There are no direct flights from California to Donegal. There are no popular flight routes from California to Donegal.
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Frequently asked questions about flying from California to Donegal

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

    Prices for flights from California to Donegal Airport are updated daily.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from California to Donegal Airport.

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

    The travel and health documents you'll need for your trip to Donegal Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Donegal Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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 California 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 California.

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

Yes. momondo allows you to filter the results for California to Donegal flights to just show those with flexible booking policies.

How can momondo help me find flights from California to Donegal?

momondo provides multiple filters to help you find the best flight to Donegal from California. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of California to Donegal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Donegal trip

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