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Cheap flights from St. Louis to Northern Ireland from £493

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 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from St. Louis to Northern Ireland

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:36 - 16:50STL-BHD
20h 14m2 stops
Multiple Airlines Logo
06:30 - 17:56BHD-STL
17h 26m2 stops
£493Multiple Airlines
Find Deal
Mon, 1 Dec - Sun, 7 Dec
Virgin Atlantic Logo
12:10 - 16:50STL-BHD
22h 40m2 stops
Virgin Atlantic Logo
06:30 - 23:10BHD-STL
22h 40m2 stops
£568Virgin Atlantic
Find Deal
Sun, 1 Mar - Thu, 5 Mar
American Airlines Logo
14:36 - 14:15STL-BHD
18h 39m2 stops
American Airlines Logo
06:35 - 23:32BHD-STL
22h 57m2 stops
£741American Airlines
Find Deal
Fri, 27 Mar - Tue, 31 Mar
British Airways Logo
19:03 - 15:40STL-BHD
14h 37m2 stops
British Airways Logo
06:35 - 19:30BHD-STL
18h 55m1 stop
£1,519British Airways
Find Deal
Mon, 27 Apr - Fri, 29 May
British Airways Logo
16:39 - 17:30STL-BHD
18h 51m2 stops
British Airways Logo
06:35 - 20:02BHD-STL
19h 27m2 stops
£1,523British Airways
Find Deal
Mon, 27 Apr - Fri, 29 May

British Airways flights from St. Louis to Northern Ireland

Our best British Airways deals on St. Louis to Northern Ireland flight tickets
British Airways
27 Apr
STL19:03Lambert-St Louis
14h 37m
2 stops
BHD15:40Belfast City
29 May
BHD06:35Belfast City
18h 55m
1 stop
STL19:30Lambert-St Louis
£1,519
Find similar
British Airways
27 Apr
STL16:39Lambert-St Louis
18h 51m
2 stops
BHD17:30Belfast City
29 May
BHD06:35Belfast City
19h 27m
2 stops
STL20:02Lambert-St Louis
£1,523
Find similar

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 31 October 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

Mon 1/12

14:36-16:50

2 stops20h 14m

Belfast City

Sun 7/12

06:30-17:56

2 stops17h 26m

£493

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

12:10-16:50

2 stops22h 40m

Belfast City

Thu 5/3

06:30-23:10

2 stops22h 40m

£568

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 27/3

14:36-14:15

2 stops18h 39m

Belfast City

Tue 31/3

06:35-23:32

2 stops22h 57m

£741

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 27/4

19:03-15:40

2 stops14h 37m

Belfast City

Fri 29/5

06:35-19:30

1 stop18h 55m

£1,519

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 27/4

16:39-17:30

2 stops18h 51m

Belfast City

Fri 29/5

06:35-20:02

2 stops19h 27m

£1,523

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

Direct flights

None
There are no direct flights from St. Louis to Northern Ireland. There are no popular flight routes from St. Louis to Northern Ireland.
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  • 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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