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.

$771 Cheap Flights from St. Louis to Northern Ireland in 2025/26

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

6:55 pm - 4:50 pm

STL

BHD

15h 55m2 stops

5:20 pm - 8:37 pm

BHD

STL

33h 17m2 stops

$771KLM

Mon, Jan 12 - Tue, Jan 20

11:14 am - 3:30 pm

STL

BHD

22h 16m2 stops

7:00 pm - 7:30 pm

BHD

STL

30h 30m1 stop

$782British Airways

Fri, Apr 24 - Sat, May 2

10:00 pm - 6:15 pm

STL

BHD

14h 15m1 stop

7:00 pm - 7:30 pm

BHD

STL

30h 30m1 stop

$784British Airways

Fri, Apr 24 - Sat, May 2

11:14 am - 3:30 pm

STL

BHD

22h 16m2 stops

7:05 am - 8:03 pm

BHD

STL

18h 58m2 stops

$785British Airways

Fri, Apr 24 - Sat, May 2

6:55 pm - 4:50 pm

STL

BHD

15h 55m2 stops

5:20 pm - 8:43 pm

BHD

STL

33h 23m2 stops

$797KLM

Mon, Jan 12 - Tue, Jan 20

6:00 am - 10:30 am

STL

BHD

22h 30m2 stops

8:45 am - 10:44 pm

BHD

STL

19h 59m2 stops

$994British Airways

Fri, Feb 6 - Tue, Feb 10

12:11 pm - 10:30 am

STL

BHD

16h 19m2 stops

6:35 am - 10:44 pm

BHD

STL

22h 09m2 stops

$995British Airways

Fri, Feb 6 - Tue, Feb 10

KLM flights from St. Louis to Northern Ireland

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

KLM

Jan 12

STL6:55 pmLambert-St Louis

15h 55m

2 stops

BHD4:50 pmBelfast City

Jan 20

BHD5:20 pmBelfast City

33h 17m

2 stops

STL8:37 pmLambert-St Louis

$771

Find similar

KLM

Jan 12

STL6:55 pmLambert-St Louis

15h 55m

2 stops

BHD4:50 pmBelfast City

Jan 20

BHD5:20 pmBelfast City

33h 23m

2 stops

STL8:43 pmLambert-St Louis

$797

Find similar

British Airways flights from St. Louis to Northern Ireland

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

British Airways

Apr 24

STL11:14 amLambert-St Louis

22h 16m

2 stops

BHD3:30 pmBelfast City

May 2

BHD7:00 pmBelfast City

30h 30m

1 stop

STL7:30 pmLambert-St Louis

$782

Find similar

British Airways

Apr 24

STL10:00 pmLambert-St Louis

14h 15m

1 stop

BHD6:15 pmBelfast City

May 2

BHD7:00 pmBelfast City

30h 30m

1 stop

STL7:30 pmLambert-St Louis

$784

Find similar

British Airways

Apr 24

STL11:14 amLambert-St Louis

22h 16m

2 stops

BHD3:30 pmBelfast City

May 2

BHD7:05 amBelfast City

18h 58m

2 stops

STL8:03 pmLambert-St Louis

$785

Find similar

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

Mon 1/12

6:55 pm-4:50 pm

2 stops15h 55m

Belfast City

Tue 1/20

5:20 pm-8:37 pm

2 stops33h 17m

$771

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 4/24

11:14 am-3:30 pm

2 stops22h 16m

Belfast City

Sat 5/2

7:00 pm-7:30 pm

1 stop30h 30m

$782

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 4/24

10:00 pm-6:15 pm

1 stop14h 15m

Belfast City

Sat 5/2

7:00 pm-7:30 pm

1 stop30h 30m

$784

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 4/24

11:14 am-3:30 pm

2 stops22h 16m

Belfast City

Sat 5/2

7:05 am-8:03 pm

2 stops18h 58m

$785

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:55 pm-4:50 pm

2 stops15h 55m

Belfast City

Tue 1/20

5:20 pm-8:43 pm

2 stops33h 23m

$797

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 2/6

6:00 am-10:30 am

2 stops22h 30m

Belfast City

Tue 2/10

8:45 am-10:44 pm

2 stops19h 59m

$994

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 2/6

12:11 pm-10:30 am

2 stops16h 19m

Belfast City

Tue 2/10

6:35 am-10:44 pm

2 stops22h 09m

$995

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

What is the cheapest day to depart on your flight to Northern Ireland?

The cheapest day to depart on your flight to Northern Ireland is on a Tuesday when prices can be found for as low as $674. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Northern Ireland for around $870.

What is the cheapest time of day to depart on your flight to Northern Ireland?

In the afternoon is the cheapest time of day to fly from St. Louis to Northern Ireland when you can find flight prices for as low as $785. Flying to Northern Ireland in the afternoon is an ideal time because this is during off-peak travel hours. Flights at noon are often more expensive with an average ticket price of $1,429.

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	15h 55m
Direct flights	None

The fastest flight from St. Louis to Northern Ireland takes 15h 55m

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.

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.