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$337+ Cheap flights from St. Louis (STL) to Northern Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$827
(Orbitz)

One-way from

$337
(Kiwi.com)
From Lambert-St Louis to Northern Ireland
Search Deals
One-way flight from Lambert-St Louis to Northern Ireland
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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 June 12, 2025.

This Orbitz deal was found by Cheapflights users on 6/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/147:23 amSTL - BHD
2 stops23h 32mBritish Airways
Mon 7/216:25 pmBHD - STL
2 stops31h 59mBritish Airways
Deal found 6/11$827
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2710:47 amSTL - BFS
3 stops27h 33mMultiple Airlines
Sun 8/310:55 pmBFS - STL
2 stops26h 50mMultiple Airlines
Deal found 6/12$1,187
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/149:15 amSTL - BHD
3 stops29h 55mMultiple Airlines
Mon 7/216:55 amBHD - STL
2 stops18h 45mMultiple Airlines
Deal found 6/10$1,522

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis 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 June 12, 2025.
Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.

Fly from

St. Louis

Fly to

Northern Ireland

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 7/14

7:23 am-12:55 pm

2 stops23h 32m

Belfast City

Mon 7/21

6:25 pm-8:24 pm

2 stops31h 59m

$827

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 7/27

10:47 am-8:20 pm

3 stops27h 33m

Belfast Intl

Sun 8/3

10:55 pm-7:45 pm

2 stops26h 50m

$1,187

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 7/14

9:15 am-9:10 pm

3 stops29h 55m

Belfast City

Mon 7/21

6:55 am-7:40 pm

2 stops18h 45m

$1,522

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 7/27

5:40 pm-7:30 am

2 stops55h 50m

$337

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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?

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 June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Northern Ireland as you normally would.

Rainfall in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average rainfall totals by month.

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.

Temperature in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. 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 Northern Ireland. Reviews last updated June 12, 2025.
British Airways
6.6
Okay
7,008 reviews

Food

6.3

Boarding

6.8

Comfort

6.7

Overall

6.6

Entertainment

6.4

Crew

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,May 2025

LAX - LHR

Entertainment system did not work. Seems like Wi-Fi should have been comped at hat point. Boarding at Marco Polo in Venice was terrible. Insisted on gate checking our bag but not others! Connection was confused and flight was very late.
British Airways
6.6
Okay
7,008 reviews
British Airways
6.6
Okay
7,008 reviews

Food

6.3

Boarding

6.8

Comfort

6.7

Overall

6.6

Entertainment

6.4

Crew

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,May 2025

LAX - LHR

Entertainment system did not work. Seems like Wi-Fi should have been comped at hat point. Boarding at Marco Polo in Venice was terrible. Insisted on gate checking our bag but not others! Connection was confused and flight was very late.

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?

    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.

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

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Northern Ireland (average of $657). Flying from St. Louis to Northern Ireland in June is currently the most expensive (average of $1,189). 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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Top airline flying from St. Louis to Northern Ireland

Discover the top airline that operate flights from St. Louis to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$658Average$674FlexibilityNo cancel feeOn-time71%

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