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

Delta and Virgin Atlantic can get you from St. Louis to Northern Ireland in just under 24h 05m. Your travel time can differ by up to 2h 45m. St. Louis and Northern Ireland are separated by a distance of 3893 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

In terms of precipitation, rainfall in Northern Ireland ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Northern Ireland when rainfall is around 2.0 in.

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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 vacation 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.

$749+ Flights from St. Louis to Northern Ireland

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to Northern Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Northern Ireland

Round-trip from	$749 (Delta)

From Lambert-St Louis to Northern Ireland

Search Deals

Find flight deals from St. Louis to Northern Ireland

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 layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2025.

Sun 3/110:45 amSTL - BHD

2 stops24h 05mDelta

Thu 3/56:30 amBHD - STL

2 stops20h 09mDelta

Deal found 10/19

$749

Sun 3/112:10 pmSTL - BHD

2 stops26h 50mVirgin Atlantic

Thu 3/56:30 amBHD - STL

2 stops17h 34mVirgin Atlantic

Deal found 10/19

$750

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 - BHD

STLBHD

Lambert-St Louis

Sun 3/1

10:45 am-4:50 pm

2 stops24h 05m

Belfast City

Thu 3/5

6:30 am-8:39 pm

2 stops20h 09m

$749

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

12:10 pm-9:00 pm

2 stops26h 50m

Belfast City

Thu 3/5

6:30 am-6:04 pm

2 stops17h 34m

$750

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

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 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 St. Louis to Northern Ireland

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

It’s typically best to fly out from St. Louis to Northern Ireland in the evening. Doing so could potentially save you 41% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Northern Ireland

Get a feel of what it's like to fly with American Airlines from St. Louis to Northern Ireland by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.2

Good

11,029 reviews

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

American Airlines

7.2

Good

11,029 reviews

American Airlines

7.2

Good

11,029 reviews

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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?
Delta and Virgin Atlantic can get you from St. Louis to Northern Ireland in just under 24h 05m. Your travel time can differ by up to 2h 45m. St. Louis and Northern Ireland are separated by a distance of 3893 mi. When browsing for deals, the options you’ll see will be for both nonstop 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 vacation 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Northern Ireland

St. Louis to Heathrow flights

Kansas City to Heathrow flights

Kansas City to Gatwick flights

St. Louis to Gatwick flights

St. Louis to London City flights

Springfield to Heathrow flights

Kansas City to London City flights

St. Louis to Edinburgh flights

St. Louis to Stansted flights

Kansas City to Edinburgh flights

St. Louis to Glasgow Intl flights

Springfield to London City flights

St. Louis to Luton flights

Kansas City to Stansted flights

Columbia to Heathrow flights

St. Louis to Manchester flights

Kansas City to Manchester flights

Joplin to Heathrow flights

Springfield to Glasgow Intl flights

Kansas City to Glasgow Intl flights

Springfield to Edinburgh flights

Kansas City to Birmingham flights

Kansas City to Inverness flights

St. Louis to Birmingham flights

Kansas City to Belfast City flights

Kansas City to Cardiff flights

St. Louis to Belfast Intl flights

Springfield to Gatwick flights

Joplin to Edinburgh flights

Kansas City to Bristol flights

Kansas City to Newcastle upon Tyne flights

St. Louis to Leeds flights

Kansas City to Leeds flights

Kansas City to Grimsby flights

Kansas City to Aberdeen flights

St. Louis to Inverness flights

Kansas City to Liverpool flights

Top airline flying from St. Louis to Northern Ireland

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$674	Average$832	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$749+ Cheap flights from St. Louis (STL) 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Northern Ireland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 October 22, 2025.

Round-trip from

Find flight deals from St. Louis to Northern Ireland

Best flights from St. Louis to Northern IrelandDiscover carefully curated flight deals from St. Louis to Northern Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2025.

Discover carefully curated flight deals from St. Louis to Northern Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 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

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

Find hourly flight availability from St. Louis to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2025.

Reviews of airlines servicing Northern Ireland

Get a feel of what it's like to fly with American Airlines from St. Louis to Northern Ireland by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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.

Top airline flying from St. Louis to Northern Ireland

100% Free

Book with Flexibility

Travel Smart

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 layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2025.