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$1,518+ Cheap flights from Santa Rosa (STS) to Northern Ireland

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
STS — BFS
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheap flight deals from Santa Rosa to Northern Ireland

Keep the following information in mind while searching for Santa Rosa to Northern Ireland flight deals. Data was last updated October 16, 2025.

Round-trip from

$1,518
(American Airlines)

Popular in

November

Cheapest in

April

Average price

$651
From Santa Rosa Sonoma County to Northern Ireland
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($150 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Santa Rosa to Northern Ireland

Best flights from Santa Rosa to Northern Ireland
Discover carefully curated flight deals from Santa Rosa to Northern Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 16, 2025.

This American Airlines deal was found by Cheapflights users on 10/15. 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.
Sun 4/57:00 amSTS - BHD
2 stops22h 05mAmerican Airlines
Thu 4/912:40 pmBHD - STS
2 stops29h 07mAmerican Airlines
Deal found 10/15$1,518

Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Northern Ireland 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 October 16, 2025.
Use the filters below to find and compare flights from Santa Rosa to Northern Ireland that are best for you.

Fly from

Santa Rosa

Fly to

Northern Ireland

Route

Depart

Return

Price

Santa RosaBelfast

STS - BHD

STSBHD

Santa Rosa Sonoma County

Sun 4/5

7:00 am-1:05 pm

2 stops22h 05m

Belfast City

Thu 4/9

12:40 pm-9:47 am

2 stops29h 07m

$1,518

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Best time to book a flight from Santa Rosa to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Santa Rosa 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.

Cheapflights Insights

Everything you need to know about your flight from Santa Rosa to Northern Ireland

What is the cheapest month to book a flight from Santa Rosa to Northern Ireland?

Currently, April is the cheapest month in which you can book a flight from Santa Rosa to Northern Ireland (average of $587). Flying from Santa Rosa to Northern Ireland in January is currently the most expensive (average of $1,339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Santa Rosa to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Santa Rosa to Northern Ireland?

    Located just 7.2 mi from the city center, Santa Rosa Sonoma County (STS) is the airport most travelers will use when flying to Northern Ireland from Santa Rosa.

  • How long is the flight from Santa Rosa to Northern Ireland?

    Airlines like American Airlines fly from Santa Rosa to Northern Ireland in about 22h 05m. The time it takes to get you to your destination can typically vary by up to . Santa Rosa and Northern Ireland are separated by a distance of 4999 mi.

  • Can I find deals for flights from Santa Rosa to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Santa Rosa to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santa Rosa to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santa Rosa to Northern Ireland.

  • Can I find deals for business class flights from Santa Rosa to Northern Ireland?

    Yes. Cheapflights offers flight deals from Santa Rosa to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Santa Rosa to Northern Ireland?

    Currently, April is the cheapest month in which you can book a flight from Santa Rosa to Northern Ireland (average of $587). Flying from Santa Rosa to Northern Ireland in January is currently the most expensive (average of $1,339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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