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

Departing from St. Louis to Northern Ireland will take you 14h 31m. There are 3893 mi between St. Louis and Northern Ireland.

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.

£370+ Cheap Flights from St. Louis to Northern Ireland

Cheap flight deals from St. Louis to Northern Ireland

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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 12 October 2026.

Mon 16/1113:15 -

2 stops15h 35m

Wed 18/1117:35 -

2 stops32h 58m

Deal found 7/10£1,131

Find flight deals from St. Louis to Northern Ireland

Round-trip from	£860
One-way from	£370

British Airways
1/3-3/3
4 total stops
49h 48m total
St. Louis to Northern Ireland

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British Airways
7/11-31/12
2 total stops
15h 59m total
St. Louis to Northern Ireland

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St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Sat 7/11

17:16-15:15

2 stops15h 59m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£370

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Sat 7/11

19:59-09:45

3 stops55h 46m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£427

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 1/3

14:19-10:50

2 stops14h 31m

Belfast City

Wed 3/3

15:45-19:27

2 stops33h 42m

£860

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 16/11

13:20-10:50

2 stops15h 30m

Belfast City

Wed 18/11

17:35-19:27

2 stops31h 52m

£1,131

Flights are sorted by cheapest return flights first.

Deals found on 8/10

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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.

STL-BHD

Estimated return price

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

STL-GBNIR

STL-BHD

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 14h 31m. There are 3893 mi between St. Louis and Northern Ireland.
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.

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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 £370

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/11. 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

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 12 October 2026.

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 12 October 2026.

Best flights from St. Louis to Northern IrelandDiscover 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 12 October 2026.

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 12 October 2026.

Last-minute flights from St. Louis to Northern IrelandDiscover last-minute flight deals from St. Louis to Northern Ireland. Data last updated 12 October 2026 and is based on user searches.

Discover last-minute flight deals from St. Louis to Northern Ireland. Data last updated 12 October 2026 and is based on user searches.

One-way flights from St. Louis to Northern IrelandSearch for one-way flight options from St. Louis to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Search for one-way flight options from St. Louis to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

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Related info for your journey

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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Northern Ireland

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Complete your trip

Complete your trip to Northern Ireland by adding a car hire and/or hotel booking to your travel itinerary.

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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 12 October 2026.

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 12 October 2026.

Last-minute flights from St. Louis to Northern Ireland
Discover last-minute flight deals from St. Louis to Northern Ireland. Data last updated 12 October 2026 and is based on user searches.

One-way flights from St. Louis to Northern Ireland
Search for one-way flight options from St. Louis to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.