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Northern Ireland

$1,079+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$1,079
(Travelocity)
From Lambert-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 May 1, 2025.

This Travelocity deal was found by Cheapflights users on 4/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/146:00 amSTL - BHD
2 stops24h 55mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops30h 54mBritish Airways
Deal found 4/30$1,079
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/159:15 amSTL - BHD
2 stops26h 25mMultiple Airlines
Mon 7/217:00 amBHD - STL
3 stops21h 45mMultiple Airlines
Deal found 4/30$1,540
This StudentUniverse deal was found by Cheapflights users on 4/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:23 amSTL - BHD
3 stops23h 27mAer Lingus
Mon 7/2110:20 amBHD - STL
3 stops27h 36mAer Lingus
Deal found 4/30$1,560

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 May 1, 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

6:00 am-12:55 pm

2 stops24h 55m

Belfast City

Mon 7/21

7:30 pm-8:24 pm

2 stops30h 54m

$1,079

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

9:15 am-5:40 pm

2 stops26h 25m

Belfast City

Mon 7/21

7:00 am-10:45 pm

3 stops21h 45m

$1,540

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

7:23 am-12:50 pm

3 stops23h 27m

Belfast City

Mon 7/21

10:20 am-7:56 am

3 stops27h 36m

$1,560

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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 May 1, 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 May 1, 2025.
Aer Lingus
7.0
Good
1,076 reviews

Comfort

7.0

Boarding

7.2

Entertainment

6.7

Food

6.4

Crew

7.9

Overall

7.0

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Aer Lingus
7.0
Good
1,076 reviews
Aer Lingus
7.0
Good
1,076 reviews

Comfort

7.0

Boarding

7.2

Entertainment

6.7

Food

6.4

Crew

7.9

Overall

7.0

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
British Airways
6.6
Okay
6,842 reviews
Aer Lingus
7.0
Good
1,076 reviews

Comfort

7.0

Boarding

7.2

Entertainment

6.7

Food

6.4

Crew

7.9

Overall

7.0

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.

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.

See more FAQs

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Alternative routes for St. Louis to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$658Average$674FlexibilityNo cancel feeOn-time71%

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