Find flights
When to book
FAQs

Cheap flights from St. Louis to Northern Ireland from £804

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
27 Apr — 4 Mai1
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 28 März 2026.

So 6/1216:49
STL
-
BHD
2 stops18h 01m
British Airways
Mi 9/1211:25
BHD
-
STL
2 stops18h 33m
British Airways
Deal found 23/3£804
Mi 2/1214:54
STL
-
BHD
2 stops17h 21m
British Airways
So 6/1220:25
BHD
-
STL
2 stops29h 56m
British Airways
Deal found 23/3£842
Di 7/717:42
STL
-
BHD
2 stops17h 13m
Multiple Airlines
Sa 18/709:50
BHD
-
STL
2 stops18h 06m
Multiple Airlines
Deal found 27/3£855
Fr 8/515:30
STL
-
BFS
2 stops23h 45m
Multiple Airlines
Fr 15/521:05
BFS
-
STL
3 stops29h 20m
Multiple Airlines
Deal found 24/3£1,076
So 10/507:05
STL
-
BFS
3 stops25h 55m
Multiple Airlines
So 17/522:00
BFS
-
STL
3 stops25h 05m
Multiple Airlines
Deal found 26/3£1,094
Sa 9/507:05
STL
-
BFS
3 stops34h 00m
Multiple Airlines
Sa 16/508:20
BFS
-
STL
2 stops35h 05m
Multiple Airlines
Deal found 25/3£1,239
Di 7/721:35
STL
-
BHD
1 stop29h 15m
British Airways
Sa 18/712:40
BHD
-
STL
2 stops40h 52m
British Airways
Deal found 27/3£1,308
Di 7/721:35
STL
-
BFS
2 stops17h 00m
Multiple Airlines
Sa 18/708:20
BFS
-
STL
2 stops41h 10m
Multiple Airlines
Deal found 27/3£1,495
Sa 18/720:06
STL
-
BHD
2 stops32h 24m
British Airways
Mi 22/706:30
BHD
-
STL
2 stops18h 50m
British Airways
Deal found 25/3£1,685

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 28 März 2026.

Round-trip from

£855
KLM
  • KLM
  • 7/7-18/7
  • 4 total stops
  • 35h 19m 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 28 März 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

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fr 8/5

15:30-21:15

2 stops23h 45m

Belfast Intl

Fr 15/5

21:05-20:25

3 stops29h 20m

£1,076

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

So 10/5

07:05-15:00

3 stops25h 55m

Belfast Intl

So 17/5

22:00-17:05

3 stops25h 05m

£1,094

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Di 7/7

21:35-08:50

1 stop29h 15m

Belfast City

Sa 18/7

12:40-23:32

2 stops40h 52m

£1,308

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Di 7/7

21:35-08:50

1 stop29h 15m

Belfast City

Sa 18/7

19:05-19:30

1 stop30h 25m

£1,397

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Di 7/7

21:35-20:35

2 stops17h 00m

Belfast Intl

Sa 18/7

08:20-19:30

2 stops41h 10m

£1,495

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sa 18/7

20:06-10:30

2 stops32h 24m

Belfast City

Mi 22/7

06:30-19:20

2 stops18h 50m

£1,685

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sa 9/5

07:05-23:05

3 stops34h 00m

Belfast Intl

Sa 16/5

22:25-20:09

3 stops27h 44m

£2,056
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sa 18/7

20:01-21:05

3 stops19h 04m

Belfast City

Mi 22/7

18:10-19:24

3 stops31h 14m

£2,617

Flights are sorted by cheapest return flights first.

Deals found on 24/3

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 29h 15m. There are 3893 mi between St. Louis and Northern Ireland.

  • 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.

See more FAQs

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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

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.

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.