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.

$1,031 Cheap Flights from St. Louis to Northern Ireland in 2026

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.

5:18 pm - 3:30 pmSTL Lambert-St Louis-BHD Belfast City

16h 12m2 stops Chicago O'Hare Intl London Heathrow

6:30 am - 7:18 pmBHD Belfast City-STL Lambert-St Louis

18h 48m2 stops London Heathrow Charlotte Douglas

$1,031American Airlines

Mon, Sep 28 - Sun, Oct 11

7:29 am - 10:50 amSTL Lambert-St Louis-BHD Belfast City

21h 21m2 stops Chicago O'Hare Intl London Heathrow

6:45 am - 4:43 pmBHD Belfast City-STL Lambert-St Louis

15h 58m2 stops London Heathrow Chicago O'Hare Intl

$1,152British Airways

Mon, Jan 18 - Fri, Jan 22

1:49 pm - 12:55 pmSTL Lambert-St Louis-BHD Belfast City

17h 06m2 stops Chicago O'Hare Intl London Heathrow

6:30 am - 7:30 pmBHD Belfast City-STL Lambert-St Louis

19h 00m1 stop London Heathrow

$1,846British Airways

Mon, Sep 28 - Sun, Oct 11

8:55 am - 11:05 pmSTL Lambert-St Louis-BFS Belfast Intl

32h 10m3 stops Toronto Pearson Intl Frankfurt am Main Birmingham

3:20 pm - 1:25 pmBFS Belfast Intl-STL Lambert-St Louis

28h 05m2 stops Birmingham Frankfurt am Main

$2,165Multiple Airlines

Sat, Sep 26 - Sat, Oct 3

12:10 pm - 12:25 pmSTL Lambert-St Louis-BFS Belfast Intl

18h 15m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

3:20 pm - 1:25 pmBFS Belfast Intl-STL Lambert-St Louis

28h 05m2 stops Birmingham Frankfurt am Main

$2,338Multiple Airlines

Sat, Sep 26 - Sat, Oct 3

8:55 am - 7:05 pmSTL Lambert-St Louis-BFS Belfast Intl

28h 10m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Paris Charles de Gaulle

10:10 pm - 2:00 pmBFS Belfast Intl-STL Lambert-St Louis

45h 50m3 stops Manchester Munich Franz Josef Strauss Toronto Pearson Intl

$3,115Multiple Airlines

Mon, Sep 28 - Sun, Oct 11

3:34 pm - 7:40 pmSTL Lambert-St Louis-BHD Belfast City

46h 06m3 stops Dallas/Fort Worth Hong Kong Intl London Heathrow

1:10 pm - 11:59 pmBHD Belfast City-STL Lambert-St Louis

40h 49m3 stops London Heathrow Hong Kong Intl Seattle/Tacoma Intl

$13,498Multiple Airlines

Mon, Sep 28 - Sun, Oct 11

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British Airways flights from St. Louis to Northern Ireland

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

British Airways

Jan 18

STL7:29 amLambert-St Louis

21h 21m

2 stops

BHD10:50 amBelfast City

Jan 22

BHD6:45 amBelfast City

15h 58m

2 stops

STL4:43 pmLambert-St Louis

$1,152

British Airways

Sep 28

STL1:49 pmLambert-St Louis

17h 06m

2 stops

BHD12:55 pmBelfast City

Oct 11

BHD6:30 amBelfast City

19h 00m

1 stop

STL7:30 pmLambert-St Louis

$1,846

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 Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 9/28

5:18 pm-3:30 pm

2 stops16h 12m

Belfast City

Sun 10/11

6:30 am-7:18 pm

2 stops18h 48m

$1,031

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 1/18

7:29 am-10:50 am

2 stops21h 21m

Belfast City

Fri 1/22

6:45 am-4:43 pm

2 stops15h 58m

$1,152

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 9/28

1:49 pm-12:55 pm

2 stops17h 06m

Belfast City

Sun 10/11

6:30 am-7:30 pm

1 stop19h 00m

$1,846

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 9/26

8:55 am-11:05 pm

3 stops32h 10m

Belfast Intl

Sat 10/3

3:20 pm-1:25 pm

2 stops28h 05m

$2,165

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 9/26

12:10 pm-12:25 pm

2 stops18h 15m

Belfast Intl

Sat 10/3

3:20 pm-1:25 pm

2 stops28h 05m

$2,338

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Mon 9/28

8:55 am-7:05 pm

3 stops28h 10m

Belfast Intl

Sun 10/11

10:10 pm-2:00 pm

3 stops45h 50m

$3,115

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 9/28

3:34 pm-7:40 pm

3 stops46h 06m

Belfast City

Sun 10/11

1:10 pm-11:59 pm

3 stops40h 49m

$13,498

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on St. Louis to Northern Ireland flights?

You could potentially save up to 24% on your flight if you consider stops on a St. Louis to Northern Ireland flight.

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	18h 44m
Direct flights	None

The fastest flight from St. Louis to Northern Ireland takes 18h 44m

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

Frequently asked questions about flying from St. Louis to Northern Ireland

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.

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.