Cheap flights from St. Louis to Northern Ireland from £571

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Northern Ireland departing on 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from St. Louis to Northern Ireland

Cheap return flights

British Airways Logo
17:09 - 11:20STL-BHD
36h 11m2 stops
British Airways Logo
09:15 - 21:55BHD-STL
41h 40m2 stops
£571British Airways
Find Deal
Sat, 25 Oct - Sat, 1 Nov
British Airways Logo
10:23 - 12:10STL-BHD
19h 47m2 stops
British Airways Logo
06:35 - 18:11BHD-STL
16h 36m2 stops
£604British Airways
Find Deal
Sat, 25 Oct - Sat, 1 Nov
 Logo
09:15 - 11:20STL-BFS
20h 05m3 stops
 Logo
08:40 - 13:32BFS-STL
34h 52m3 stops
Mon, 11 Aug - Thu, 14 Aug
 Logo
09:15 - 11:20STL-BFS
20h 05m3 stops
 Logo
22:45 - 15:21BFS-STL
22h 36m2 stops
Mon, 11 Aug - Thu, 14 Aug
 Logo
09:15 - 11:20STL-BFS
20h 05m2 stops
 Logo
22:45 - 15:21BFS-STL
22h 36m2 stops
£1,035
Find Deal
Mon, 11 Aug - Thu, 14 Aug
 Logo
16:00 - 14:10STL-BFS
16h 10m3 stops
 Logo
17:25 - 19:45BFS-STL
32h 20m3 stops
£1,127
Find Deal
Tue, 12 Aug - Fri, 15 Aug

British Airways flights from St. Louis to Northern Ireland

Our best British Airways deals on St. Louis to Northern Ireland flight tickets
British Airways
25 Oct
STL17:09Lambert-St Louis
36h 11m
2 stops
BHD11:20Belfast City
1 Nov
BHD09:15Belfast City
41h 40m
2 stops
STL21:55Lambert-St Louis
British Airways
25 Oct
STL10:23Lambert-St Louis
19h 47m
2 stops
BHD12:10Belfast City
1 Nov
BHD06:35Belfast City
16h 36m
2 stops
STL18:11Lambert-St Louis

momondo 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, momondo users made 279,928 searches. Data last updated 1 August 2025.
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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 25/10

17:09-11:20

2 stops36h 11m

Belfast City

Sat 1/11

09:15-21:55

2 stops41h 40m

£571

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 25/10

10:23-12:10

2 stops19h 47m

Belfast City

Sat 1/11

06:35-18:11

2 stops16h 36m

£604

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 11/8

09:15-11:20

3 stops20h 05m

Belfast Intl

Thu 14/8

08:40-13:32

3 stops34h 52m

£969

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 11/8

09:15-11:20

3 stops20h 05m

Belfast Intl

Thu 14/8

22:45-15:21

2 stops22h 36m

£983

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 11/8

09:15-11:20

2 stops20h 05m

Belfast Intl

Thu 14/8

22:45-15:21

2 stops22h 36m

£1,035

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 12/8

16:00-14:10

3 stops16h 10m

Belfast Intl

Fri 15/8

17:25-19:45

3 stops32h 20m

£1,127

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap St. Louis to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Northern Ireland

Best price found

£571

Fastest flight time

16h 10m

Direct flights

None

Airports in Northern Ireland

2 airports
The best flight deal from St. Louis to Northern Ireland found on momondo in the last 72 hours is £571
The fastest flight from St. Louis to Northern Ireland takes 16h 10m
There are no direct flights from St. Louis to Northern Ireland. Popular non-direct routes for this connection are Lambert-St Louis Airport - Belfast City Airport and Lambert-St Louis Airport - Belfast Intl Airport.
There are 2 airports near Northern Ireland: Belfast Intl (BFS), Belfast City (BHD)

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Northern Ireland?

    Prices for flights from Lambert-St Louis Airport to Northern Ireland are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Northern Ireland?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Northern Ireland.

  • What documentation or ID do you need to fly to Northern Ireland?

    The travel and health documents required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


  • How do I get Price Alerts for flights from St. Louis to Northern Ireland?

    Search flight deals from St. Louis to Northern Ireland. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from St. Louis to Northern Ireland with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.


Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Northern Ireland?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Northern Ireland. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Northern Ireland with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Northern Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Northern Ireland?

momondo helps you find the best flight between St. Louis and Northern Ireland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Northern Ireland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Northern Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
Wed 6/8
Wed 13/8

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Popular Cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo