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

You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Northern Ireland . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

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

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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 were last updated today.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Northern Ireland.

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

The required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$684 Cheap Flights from St. Louis to Northern Ireland in 2026

1 adult

0 bags

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Find the cheapest flights from St. Louis to Northern Ireland

Round-trip

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 2:15 pm

STL

BHD

16h 10m

2 stops

9:10 am - 9:12 pm

BHD

STL

18h 02m

2 stops

$782American Airlines

Wed, Feb 25 - Sun, Mar 1

10:37 am - 10:15 am

STL

BHD

17h 38m

2 stops

8:25 pm - 11:48 pm

BHD

STL

33h 23m

2 stops

$1,039British Airways

Wed, Feb 25 - Sun, Mar 1

11:59 am - 9:10 am

STL

BHD

15h 11m

2 stops

12:10 pm - 11:48 pm

BHD

STL

17h 38m

2 stops

$1,090British Airways

Wed, Feb 25 - Sun, Mar 1

8:00 am - 10:15 am

STL

BHD

20h 15m

2 stops

10:40 am - 11:48 pm

BHD

STL

19h 08m

2 stops

$1,092British Airways

Wed, Feb 25 - Sun, Mar 1

4:05 pm - 6:25 pm

STL

BHD

20h 20m

3 stops

4:55 pm - 3:29 pm

BHD

STL

28h 34m

3 stops

$2,264Multiple Airlines

Wed, Feb 25 - Sun, Mar 1

British Airways flights from St. Louis to Northern Ireland

Our best British Airways deals on St. Louis to Northern Ireland flight tickets

British Airways

Feb 25

STL10:37 amLambert-St Louis

17h 38m

2 stops

BHD10:15 amBelfast City

Mar 1

BHD8:25 pmBelfast City

33h 23m

2 stops

STL11:48 pmLambert-St Louis

$1,039

British Airways

Feb 25

STL11:59 amLambert-St Louis

15h 11m

2 stops

BHD9:10 amBelfast City

Mar 1

BHD12:10 pmBelfast City

17h 38m

2 stops

STL11:48 pmLambert-St Louis

$1,090

British Airways

Feb 25

STL8:00 amLambert-St Louis

20h 15m

2 stops

BHD10:15 amBelfast City

Mar 1

BHD10:40 amBelfast City

19h 08m

2 stops

STL11:48 pmLambert-St Louis

$1,092

momondo Fare Finder

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

Wed 2/25

4:05 pm-2:15 pm

2 stops16h 10m

Belfast City

Sun 3/1

9:10 am-9:12 pm

2 stops18h 02m

$782

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

10:37 am-10:15 am

2 stops17h 38m

Belfast City

Sun 3/1

8:25 pm-11:48 pm

2 stops33h 23m

$1,039

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

11:59 am-9:10 am

2 stops15h 11m

Belfast City

Sun 3/1

12:10 pm-11:48 pm

2 stops17h 38m

$1,090

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

8:00 am-10:15 am

2 stops20h 15m

Belfast City

Sun 3/1

10:40 am-11:48 pm

2 stops19h 08m

$1,092

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

4:05 pm-6:25 pm

3 stops20h 20m

Belfast City

Sun 3/1

4:55 pm-3:29 pm

3 stops28h 34m

$2,264

Flights are sorted by cheapest round-trip 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

Fastest flight time	14h 00m
Direct flights	None

The fastest flight from St. Louis to Northern Ireland takes 14h 00m

There are no direct flights from St. Louis to Northern Ireland. There are no popular flight routes from St. Louis to Northern Ireland.

Search flight deals

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 were last updated today.
How old do you have to be to fly from Lambert-St Louis Airport to Northern Ireland?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Northern Ireland.
What documentation or ID do you need to fly to Northern Ireland?
The required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

How do I get Price Alerts for flights from St. Louis to Northern Ireland?
You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Northern Ireland. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from St. Louis to Northern Ireland with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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. All flights to Northern Ireland from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Northern Ireland.

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

If you are simply researching potential flights to Northern Ireland, momondo offers a useful price alert feature which will track prices for flights to Northern Ireland from St. Louis and alert you when they change.