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Cheap flights from St. Louis to Northern Ireland from £721

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
19 Aug — 26 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Northern Ireland

Enter your travel dates to find the best prices.

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 20 July 2026.

Sun 1/1114:08
STL
-
BHD
2 stops17h 47m
American Airlines
Sun 8/1112:10
BHD
-
STL
2 stops17h 48m
American Airlines
Deal found 17/7£721
Tue 1/1217:31
STL
-
BHD
2 stops19h 09m
British Airways
Fri 4/1206:45
BHD
-
STL
2 stops23h 13m
British Airways
Deal found 19/7£850
Sun 29/1113:15
STL
-
BHD
2 stops19h 45m
British Airways
Wed 2/1217:40
BHD
-
STL
2 stops32h 41m
British Airways
Deal found 19/7£881
Wed 2/912:10
STL
-
BFS
2 stops25h 05m
Multiple Airlines
Wed 9/915:40
BFS
-
STL
3 stops33h 01m
Multiple Airlines
Deal found 19/7£942

Find 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 20 July 2026.

Round-trip from

£721
American Airlines
  • American Airlines
  • 1/11-8/11
  • 4 total stops
  • 35h 35m total
  • St. Louis to Northern Ireland
Search Deals

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 20 July 2026.
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

Cheapest return flight
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/11

14:08-13:55

2 stops17h 47m

Belfast City

Sun 8/11

12:10-23:58

2 stops17h 48m

£721

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 29/11

10:45-15:00

2 stops22h 15m

Belfast City

Wed 2/12

15:40-19:30

2 stops33h 50m

£881

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Wed 2/9

12:10-22:20

3 stops28h 10m

Belfast Intl

Wed 9/9

15:40-18:41

3 stops33h 01m

£1,055

Flights are sorted by cheapest return flights first.

Deals found on 17/7

Sorted by cheapest first

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.

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.

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

    Departing from St. Louis to Northern Ireland will take you 17h 47m. There are 3893 mi between St. Louis and Northern Ireland. When browsing for deals, the options you’ll see will be for both direct 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 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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