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Cheap flights from St. Louis to Northern Ireland from £528

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
23 Jul — 30 Jul1
1 adult

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 18 July 2025.

Round-trip from

£528
British Airways
  • British Airways
  • 17/8-20/8
  • 4 total stops
  • 47h 44m 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 18 July 2025.

Sun 17/819:59STL - BHD
2 stops15h 41mBritish Airways
Wed 20/818:15BHD - STL
2 stops32h 03mBritish Airways
Deal found 18/7£528
Sun 17/815:30STL - BFS
2 stops24h 50mMultiple Airlines
Wed 20/806:10BFS - STL
3 stops37h 22mMultiple Airlines
Deal found 18/7£752
Sun 17/815:30STL - BHD
2 stops20h 45mMultiple Airlines
Wed 20/807:05BHD - STL
3 stops36h 27mMultiple Airlines
Deal found 18/7£815

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 18 July 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

Sun 17/8

19:59-17:40

2 stops15h 41m

Belfast City

Wed 20/8

18:15-20:18

2 stops32h 03m

£528

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 17/8

15:30-22:20

2 stops24h 50m

Belfast Intl

Wed 20/8

06:10-13:32

3 stops37h 22m

£752

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 17/8

15:30-18:15

2 stops20h 45m

Belfast City

Wed 20/8

07:05-13:32

3 stops36h 27m

£815

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 4/9

15:35-18:15

3 stops44h 40m

£950

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 4/9

09:27-15:30

2 stops24h 03m

£997

Flights are sorted by cheapest return flights first.

Deals found on 17/7

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.

Cheapflights Insights

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.

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 18 July 2025.
See what other customers who have flown with British Airways from St. Louis to Northern Ireland have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.6
Okay
7,151 reviews
Check prices

Food

6.3

Crew

7.6

Entertainment

6.4

Comfort

6.7

Overall

6.6

Boarding

6.9

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
7,151 reviews
British Airways
6.6
Okay
7,151 reviews
Check prices

Food

6.3

Crew

7.6

Entertainment

6.4

Comfort

6.7

Overall

6.6

Boarding

6.9

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 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.

See more FAQs

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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.

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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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