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$1,042+ Cheap flights from San Francisco (SFO) to Donegal (CFN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — CFN
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from San Francisco to Donegal

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Donegal (CFN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$1,042
(Gurufare)
From San Francisco to Donegal
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Find flight deals from San Francisco to Donegal

Cheapest flights from San Francisco to Donegal
Explore the most affordable flight options available from San Francisco to Donegal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Gurufare deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:40 pmSFO - CFN
1 stop12h 20mAer Lingus
Thu 9/112:30 pmCFN - SFO
1 stop33h 20mAer Lingus
Deal found 7/27$1,042
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:45 amSFO - CFN
2 stops24h 15mMultiple Airlines
Thu 9/117:55 amCFN - SFO
2 stops18h 06mMultiple Airlines
Deal found 7/28$1,075

Cheapflights Fare Finder

 
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, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from San Francisco to Donegal that are best for you.

Fly from

San Francisco

Fly to

Donegal

Route

Depart

Return

Price

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Thu 8/28

5:40 pm-2:00 pm

1 stop12h 20m

Donegal

Thu 9/11

2:30 pm-3:50 pm

1 stop33h 20m

$1,042

San FranciscoDonegal

SFO - CFN

SFOCFN

San Francisco

Thu 8/28

5:45 am-2:00 pm

2 stops24h 15m

Donegal

Thu 9/11

7:55 am-6:01 pm

2 stops18h 06m

$1,075

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from San Francisco to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Donegal

Get insights into the airlines that provide service to Donegal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Donegal. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Aer Lingus from San Francisco to Donegal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.1
Good
1,190 reviews

Overall

7.1

Food

6.4

Crew

8.0

Boarding

7.3

Entertainment

6.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.1
Good
1,190 reviews
Aer Lingus
7.1
Good
1,190 reviews

Overall

7.1

Food

6.4

Crew

8.0

Boarding

7.3

Entertainment

6.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Donegal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from San Francisco to Donegal that include hotel bookings?

    Yes. In addition to deals on San Francisco to Donegal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Donegal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Donegal.

  • Can I find deals for business class flights from San Francisco to Donegal?

    Yes. Cheapflights offers flight deals from San Francisco to Donegal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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