How long is the flight from St. Louis to Northern Ireland?

Departing from St. Louis to Northern Ireland will take you 15h 31m. There are 3893 mi between St. Louis and Northern Ireland. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What is the cheapest month to book a flight from St. Louis to Northern Ireland?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Northern Ireland (average of £67). Flying from St. Louis to Northern Ireland in July is currently the most expensive (average of £90). 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.

In terms of precipitation, rainfall in Northern Ireland ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Northern Ireland when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Northern Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest time of day to fly from STL to NIR?

When flying from St. Louis to Northern Ireland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from St. Louis to Northern Ireland?

Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Northern Ireland from St. Louis.

Can I find deals for flights from St. Louis to Northern Ireland that include hotel bookings?

Yes. In addition to deals on St. Louis to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from St. Louis to Northern Ireland?

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

Can I find deals for business class flights from St. Louis to Northern Ireland?

Yes. Cheapflights offers flight deals from St. Louis 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.

£427+ Flights from St. Louis to Northern Ireland

Cheap flight deals from St. Louis to Northern Ireland

Round-trip from	£427

29/9-7/10
4 total stops
49h 03m total
St. Louis to Northern Ireland

Search Deals

Find flight deals from St. Louis to Northern Ireland

Cheapest flights from St. Louis to Northern Ireland
Explore the most affordable flight options available from St. Louis to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Mon 29/913:26STL - BFS

2 stops27h 44mMultiple Airlines

Tue 7/1006:45BFS - STL

2 stops21h 19mMultiple Airlines

Deal found 15/9£427

Mon 29/919:59STL - BHD

2 stops15h 31mAmerican Airlines

Tue 7/1009:35BHD - STL

2 stops17h 54mAmerican Airlines

Deal found 15/9£518

Mon 29/913:30STL - BHD

3 stops20h 55mMultiple Airlines

Tue 7/1017:55BHD - STL

3 stops31h 43mMultiple Airlines

Deal found 15/9£1,490

Best flights from St. Louis to Northern Ireland
Discover carefully curated flight deals from St. Louis to Northern Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Mon 29/913:26STL - BFS

2 stops27h 44mMultiple Airlines

Tue 7/1006:45BFS - STL

2 stops21h 19mMultiple Airlines

Deal found 15/9£427

Mon 29/919:59STL - BHD

2 stops15h 31mAmerican Airlines

Tue 7/1009:35BHD - STL

2 stops17h 54mAmerican Airlines

Deal found 15/9£518

Sun 1/316:00STL - BHD

2 stops23h 00mVirgin Atlantic

Thu 5/306:30BHD - STL

2 stops20h 09mVirgin Atlantic

Deal found 15/9£587

Sun 1/310:45STL - BHD

2 stops28h 15mDelta

Thu 5/306:30BHD - STL

2 stops16h 20mDelta

Deal found 14/9£587

Mon 29/913:30STL - BHD

3 stops20h 55mMultiple Airlines

Tue 7/1017:55BHD - STL

3 stops31h 43mMultiple Airlines

Deal found 15/9£1,490

Last-minute flights from St. Louis to Northern Ireland
Discover last-minute flight deals from St. Louis to Northern Ireland. Data last updated 17 September 2025 and is based on user searches.

Mon 29/913:26STL - BFS

2 stops27h 44mMultiple Airlines

Tue 7/1006:45BFS - STL

2 stops21h 19mMultiple Airlines

Deal found 15/9£427

Mon 29/919:59STL - BHD

2 stops15h 31mAmerican Airlines

Tue 7/1009:35BHD - STL

2 stops17h 54mAmerican Airlines

Deal found 15/9£518

Mon 29/913:30STL - BHD

3 stops20h 55mMultiple Airlines

Tue 7/1017:55BHD - STL

3 stops31h 43mMultiple Airlines

Deal found 15/9£1,490

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 29/9

13:26-23:10

2 stops27h 44m

Belfast Intl

Tue 7/10

06:45-22:04

2 stops21h 19m

£427

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 29/9

19:59-17:30

2 stops15h 31m

Belfast City

Tue 7/10

09:35-21:29

2 stops17h 54m

£518

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

16:00-21:00

2 stops23h 00m

Belfast City

Thu 5/3

06:30-20:39

2 stops20h 09m

£587

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

10:45-21:00

2 stops28h 15m

Belfast City

Thu 5/3

06:30-16:50

2 stops16h 20m

£587

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 29/9

13:30-16:25

3 stops20h 55m

Belfast City

Tue 7/10

17:55-19:38

3 stops31h 43m

£1,490

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Best time to book a flight from St. Louis to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from St. Louis with our price prediction graph.

Estimated return 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.

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Everything you need to know about your flight from St. Louis to Northern Ireland

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from St. Louis to Northern Ireland?
Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Northern Ireland from St. Louis.
How long is the flight from St. Louis to Northern Ireland?
Departing from St. Louis to Northern Ireland will take you 15h 31m. There are 3893 mi between St. Louis and Northern Ireland. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from St. Louis to Northern Ireland that include hotel bookings?
Yes. In addition to deals on St. Louis to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from St. Louis to Northern Ireland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Northern Ireland.
Can I find deals for business class flights from St. Louis to Northern Ireland?
Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Northern Ireland?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Northern Ireland (average of £67). Flying from St. Louis to Northern Ireland in July is currently the most expensive (average of £90). 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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Alternative routes for St. Louis to Northern Ireland

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How does Cheapflights help users find flights from St. Louis to Northern Ireland?

When you search for this flight from St. Louis to Northern Ireland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Northern Ireland?

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to Northern Ireland for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from St. Louis to Northern Ireland with no change fees?

Certainly. Search results for flights to Northern Ireland from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from St. Louis to Northern Ireland become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Northern Ireland from St. Louis today and book when prices fit your budget.

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Cheap flights from St. Louis to Northern Ireland from £427

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from St. Louis to Northern Ireland

Keep the following information in mind while searching for St. Louis to Northern Ireland flight deals. Data was last updated 17 September 2025.

Round-trip from

Find flight deals from St. Louis to Northern Ireland

Cheapest flights from St. Louis to Northern IrelandExplore the most affordable flight options available from St. Louis to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Explore the most affordable flight options available from St. Louis to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.

Best time to book a flight from St. Louis to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Northern Ireland

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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 St. Louis to Northern Ireland?

How long is the flight from St. Louis to Northern Ireland?

Can I find deals for flights from St. Louis to Northern Ireland that include hotel bookings?

How can I find direct flights from St. Louis to Northern Ireland?

Can I find deals for business class flights from St. Louis to Northern Ireland?

What is the cheapest month to book a flight from St. Louis to Northern Ireland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Northern Ireland?

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Northern Ireland?

Can Cheapflights find flights from St. Louis to Northern Ireland with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to Northern Ireland become cheaper?

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Cheapest flights from St. Louis to Northern Ireland
Explore the most affordable flight options available from St. Louis to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.