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 many operators does momondo search for flights from Lambert-St Louis Airport to Northern Ireland?

As of September 2025, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Northern Ireland.

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.

$583 Cheap Flights from St. Louis to Northern Ireland in 2025/26

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Find the cheapest flights from St. Louis to Northern Ireland

Round-trip

Cheap round-trip flights

1:26 pm - 11:10 pmSTL-BFS

27h 44m2 stops

6:45 am - 10:04 pmBFS-STL

21h 19m2 stops

$583Multiple Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

7:59 pm - 5:30 pmSTL-BHD

15h 31m2 stops

9:35 am - 9:29 pmBHD-STL

17h 54m2 stops

$706American Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

10:45 am - 9:00 pmSTL-BHD

28h 15m2 stops

6:30 am - 4:50 pmBHD-STL

16h 20m2 stops

$801Delta

Find Deal

Sun, Mar 1 - Thu, Mar 5

10:45 am - 9:00 pmSTL-BHD

28h 15m2 stops

6:30 am - 4:55 pmBHD-STL

16h 25m2 stops

$802Delta

Find Deal

Sun, Mar 1 - Thu, Mar 5

10:36 am - 11:10 amSTL-BHD

18h 34m2 stops

7:00 pm - 11:49 pmBHD-STL

34h 49m2 stops

$916British Airways

Find Deal

Thu, Oct 16 - Sat, Oct 25

4:25 pm - 4:45 pmSTL-BHD

19h 20m2 stops

11:35 am - 10:29 pmBHD-STL

16h 54m2 stops

$1,347American Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

1:30 pm - 4:25 pmSTL-BHD

20h 55m3 stops

5:55 pm - 7:38 pmBHD-STL

31h 43m3 stops

$2,032Multiple Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

4:05 pm - 10:40 pmSTL-BFS

25h 35m3 stops

8:40 am - 1:55 pmBFS-STL

35h 15m3 stops

$2,789Multiple Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

4:05 pm - 10:40 pmSTL-BFS

25h 35m3 stops

8:40 am - 1:55 pmBFS-STL

35h 15m2 stops

$2,804Multiple Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

4:05 pm - 6:30 pmSTL-BFS

21h 25m2 stops

8:40 am - 1:55 pmBFS-STL

35h 15m2 stops

$2,903Multiple Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

American Airlines flights from St. Louis to Northern Ireland

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

American Airlines

Sep 29

STL7:59 pmLambert-St Louis

15h 31m

2 stops

BHD5:30 pmBelfast City

Oct 7

BHD9:35 amBelfast City

17h 54m

2 stops

STL9:29 pmLambert-St Louis

$706

Find similar

American Airlines

Nov 1

STL4:25 pmLambert-St Louis

19h 20m

2 stops

BHD4:45 pmBelfast City

Nov 8

BHD11:35 amBelfast City

16h 54m

2 stops

STL10:29 pmLambert-St Louis

$1,347

Find similar

Delta flights from St. Louis to Northern Ireland

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

Delta

Mar 1

STL10:45 amLambert-St Louis

28h 15m

2 stops

BHD9:00 pmBelfast City

Mar 5

BHD6:30 amBelfast City

16h 20m

2 stops

STL4:50 pmLambert-St Louis

$801

Find similar

Delta

Mar 1

STL10:45 amLambert-St Louis

28h 15m

2 stops

BHD9:00 pmBelfast City

Mar 5

BHD6:30 amBelfast City

16h 25m

2 stops

STL4:55 pmLambert-St Louis

$802

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 - BFS

STLBFS

Lambert-St Louis

Mon 9/29

1:26 pm-11:10 pm

2 stops27h 44m

Belfast Intl

Tue 10/7

6:45 am-10:04 pm

2 stops21h 19m

$583

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/29

7:59 pm-5:30 pm

2 stops15h 31m

Belfast City

Tue 10/7

9:35 am-9:29 pm

2 stops17h 54m

$706

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

10:45 am-9:00 pm

2 stops28h 15m

Belfast City

Thu 3/5

6:30 am-4:50 pm

2 stops16h 20m

$801

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

10:45 am-9:00 pm

2 stops28h 15m

Belfast City

Thu 3/5

6:30 am-4:55 pm

2 stops16h 25m

$802

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 10/16

10:36 am-11:10 am

2 stops18h 34m

Belfast City

Sat 10/25

7:00 pm-11:49 pm

2 stops34h 49m

$916

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 11/1

4:25 pm-4:45 pm

2 stops19h 20m

Belfast City

Sat 11/8

11:35 am-10:29 pm

2 stops16h 54m

$1,347

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/29

1:30 pm-4:25 pm

3 stops20h 55m

Belfast City

Tue 10/7

5:55 pm-7:38 pm

3 stops31h 43m

$2,032

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 11/1

4:05 pm-10:40 pm

3 stops25h 35m

Belfast Intl

Sat 11/8

8:40 am-1:55 pm

3 stops35h 15m

$2,789

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 11/1

4:05 pm-10:40 pm

3 stops25h 35m

Belfast Intl

Sat 11/8

8:40 am-1:55 pm

2 stops35h 15m

$2,804

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 11/1

4:05 pm-6:30 pm

2 stops21h 25m

Belfast Intl

Sat 11/8

8:40 am-1:55 pm

2 stops35h 15m

$2,903

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

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.

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 many operators does momondo search for flights from Lambert-St Louis Airport to Northern Ireland?
As of September 2025, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Northern Ireland.
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.

Best airlines flying from St. Louis to Northern Ireland

Compare and see reviews for airlines that fly from St. Louis to Northern Ireland with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $674	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

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.

An easier way to manage your Northern Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Flights to Londonfrom $318

Flights to Manchesterfrom $391

Flights to Edinburghfrom $396

Flights to Glasgowfrom $374

Flights to Birminghamfrom $389

Flights to Newcastle upon Tynefrom $430

Flights to Belfastfrom $514

Flights to Bristolfrom $425

Flights to Invernessfrom $407

Flights to Liverpoolfrom $441

Flights to Aberdeenfrom $487

Flights to Leedsfrom $453

Cheap flights from St. Louis to Northern Ireland from $583

This is the cheapest round-trip 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 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from St. Louis to Northern Ireland

Cheap round-trip flights

American Airlines flights from St. Louis to Northern Ireland

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

Delta flights from St. Louis to Northern Ireland

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

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.

See travel insights to Northern Ireland from

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?

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

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

When did momondo last update prices for flights from Lambert-St Louis Airport to Northern Ireland?

How many operators does momondo search for flights from Lambert-St Louis Airport to Northern Ireland?

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

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

Best airlines flying from St. Louis to Northern Ireland

Compare and see reviews for airlines that fly from St. Louis to Northern Ireland with momondo

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Northern Ireland?

Can I find flights from St. Louis to Northern Ireland with flexible booking policies on momondo?

How can momondo help me find flights 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?

An easier way to manage your Northern Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo