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.

$1,137 Cheap Flights from St. Louis to Northern Ireland in 2026

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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.

5:42 pm - 4:55 pm

STL

BHD

17h 13m

2 stops

9:50 am - 9:56 pm

BHD

STL

18h 06m

2 stops

$1,137Multiple Airlines

Tue, Jul 7 - Sat, Jul 18

3:30 pm - 9:15 pm

STL

BFS

23h 45m

2 stops

9:05 pm - 8:25 pm

BFS

STL

29h 20m

3 stops

$1,432Multiple Airlines

Fri, May 8 - Fri, May 15

7:05 am - 3:00 pm

STL

BFS

25h 55m

3 stops

10:00 pm - 5:05 pm

BFS

STL

25h 05m

3 stops

$1,455Multiple Airlines

Sun, May 10 - Sun, May 17

3:30 pm - 11:10 pm

STL

BFS

25h 40m

2 stops

10:00 pm - 5:05 pm

BFS

STL

25h 05m

3 stops

$1,493Multiple Airlines

Sun, May 10 - Sun, May 17

3:30 pm - 9:15 pm

STL

BFS

23h 45m

2 stops

9:05 pm - 8:09 pm

BFS

STL

29h 04m

2 stops

$1,626Multiple Airlines

Fri, May 8 - Fri, May 15

7:05 am - 11:05 pm

STL

BFS

34h 00m

3 stops

8:20 am - 1:25 pm

BFS

STL

35h 05m

2 stops

$1,649Multiple Airlines

Sat, May 9 - Sat, May 16

9:35 pm - 8:50 am

STL

BHD

29h 15m

1 stop

12:40 pm - 11:32 pm

BHD

STL

40h 52m

2 stops

$1,740British Airways

Tue, Jul 7 - Sat, Jul 18

9:35 pm - 8:50 am

STL

BHD

29h 15m

1 stop

7:05 pm - 7:30 pm

BHD

STL

30h 25m

1 stop

$1,859Multiple Airlines

Tue, Jul 7 - Sat, Jul 18

9:35 pm - 8:35 pm

STL

BFS

17h 00m

2 stops

8:20 am - 7:30 pm

BFS

STL

41h 10m

2 stops

$1,989Multiple Airlines

Tue, Jul 7 - Sat, Jul 18

8:06 pm - 10:30 am

STL

BHD

32h 24m

2 stops

6:30 am - 7:20 pm

BHD

STL

18h 50m

2 stops

$2,242British Airways

Sat, Jul 18 - Wed, Jul 22

British Airways flights from St. Louis to Northern Ireland

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

British Airways

Jul 7

STL9:35 pmLambert-St Louis

29h 15m

1 stop

BHD8:50 amBelfast City

Jul 18

BHD12:40 pmBelfast City

40h 52m

2 stops

STL11:32 pmLambert-St Louis

$1,740

British Airways

Jul 18

STL8:06 pmLambert-St Louis

32h 24m

2 stops

BHD10:30 amBelfast City

Jul 22

BHD6:30 amBelfast City

18h 50m

2 stops

STL7:20 pmLambert-St Louis

$2,242

British Airways

Jul 18

STL6:12 pmLambert-St Louis

34h 18m

2 stops

BHD10:30 amBelfast City

Jul 22

BHD6:30 amBelfast City

19h 00m

1 stop

STL7:30 pmLambert-St Louis

$2,551

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

Cheapest round-trip

Quickest round-trip

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

5:42 pm-4:55 pm

2 stops17h 13m

Belfast City

Sat 7/18

9:50 am-9:56 pm

2 stops18h 06m

$1,137

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 5/8

3:30 pm-9:15 pm

2 stops23h 45m

Belfast Intl

Fri 5/15

9:05 pm-8:25 pm

3 stops29h 20m

$1,432

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 5/10

7:05 am-3:00 pm

3 stops25h 55m

Belfast Intl

Sun 5/17

10:00 pm-5:05 pm

3 stops25h 05m

$1,455

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 5/10

3:30 pm-11:10 pm

2 stops25h 40m

Belfast Intl

Sun 5/17

10:00 pm-5:05 pm

3 stops25h 05m

$1,493

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 5/8

3:30 pm-9:15 pm

2 stops23h 45m

Belfast Intl

Fri 5/15

9:05 pm-8:09 pm

2 stops29h 04m

$1,626

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 5/9

7:05 am-11:05 pm

3 stops34h 00m

Belfast Intl

Sat 5/16

8:20 am-1:25 pm

2 stops35h 05m

$1,649

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

9:35 pm-8:50 am

1 stop29h 15m

Belfast City

Sat 7/18

12:40 pm-11:32 pm

2 stops40h 52m

$1,740

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

9:35 pm-8:50 am

1 stop29h 15m

Belfast City

Sat 7/18

7:05 pm-7:30 pm

1 stop30h 25m

$1,859

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 7/7

9:35 pm-8:35 pm

2 stops17h 00m

Belfast Intl

Sat 7/18

8:20 am-7:30 pm

2 stops41h 10m

$1,989

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 7/18

8:06 pm-10:30 am

2 stops32h 24m

Belfast City

Wed 7/22

6:30 am-7:20 pm

2 stops18h 50m

$2,242

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	13h 36m
Direct flights	None

The fastest flight from St. Louis to Northern Ireland takes 13h 36m

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.