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Cheap flights from St. Louis to Northern Ireland from $619

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 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
5:04 pm - 4:05 pmSTL-BHD
17h 01m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$619British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
American Airlines Logo
3:43 pm - 2:15 pmSTL-BHD
16h 32m2 stops
American Airlines Logo
9:10 am - 7:05 pmBHD-STL
15h 55m2 stops
$625American Airlines
Find Deal
Mon, Dec 1 - Sun, Dec 7
American Airlines Logo
3:37 pm - 2:15 pmSTL-BHD
16h 38m2 stops
American Airlines Logo
6:35 am - 9:15 pmBHD-STL
20h 40m2 stops
$635American Airlines
Find Deal
Mon, Jan 12 - Tue, Jan 20
Virgin Atlantic Logo
11:21 am - 4:50 pmSTL-BHD
23h 29m2 stops
Virgin Atlantic Logo
5:20 pm - 8:41 pmBHD-STL
33h 21m2 stops
$746Virgin Atlantic
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Sun, Mar 1 - Thu, Mar 5
Virgin Atlantic Logo
12:10 pm - 4:50 pmSTL-BHD
22h 40m2 stops
Virgin Atlantic Logo
6:30 am - 6:04 pmBHD-STL
17h 34m2 stops
$747Virgin Atlantic
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Sun, Mar 1 - Thu, Mar 5
British Airways Logo
10:00 pm - 3:30 pmSTL-BHD
11h 30m1 stop
British Airways Logo
1:40 pm - 7:30 pmBHD-STL
11h 50m1 stop
$749British Airways
Find Deal
Fri, May 1 - Tue, May 12
British Airways Logo
10:00 pm - 8:45 pmSTL-BHD
16h 45m1 stop
British Airways Logo
1:40 pm - 7:30 pmBHD-STL
11h 50m1 stop
$759British Airways
Find Deal
Fri, May 1 - Tue, May 12
American Airlines Logo
4:39 pm - 3:30 pmSTL-BHD
16h 51m2 stops
American Airlines Logo
9:35 am - 7:30 pmBHD-STL
15h 55m1 stop
$769American Airlines
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Fri, May 1 - Tue, May 12
Multiple Airlines Logo
12:15 pm - 1:40 pmSTL-BFS
20h 25m2 stops
Multiple Airlines Logo
6:25 pm - 11:50 pmBFS-STL
34h 25m2 stops
$1,156Multiple Airlines
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Thu, Mar 12 - Thu, Mar 26
Multiple Airlines Logo
3:30 pm - 8:25 pmSTL-BHD
22h 55m3 stops
Multiple Airlines Logo
2:35 pm - 1:30 pmBHD-STL
28h 55m2 stops
$1,615Multiple Airlines
Find Deal
Fri, May 1 - Tue, May 12

American Airlines flights from St. Louis to Northern Ireland

Our best American Airlines deals on St. Louis to Northern Ireland flight tickets
American Airlines
Dec 1
STL3:43 pmLambert-St Louis
16h 32m
2 stops
BHD2:15 pmBelfast City
Dec 7
BHD9:10 amBelfast City
15h 55m
2 stops
STL7:05 pmLambert-St Louis
$625
Find similar
American Airlines
Jan 12
STL3:37 pmLambert-St Louis
16h 38m
2 stops
BHD2:15 pmBelfast City
Jan 20
BHD6:35 amBelfast City
20h 40m
2 stops
STL9:15 pmLambert-St Louis
$635
Find similar
American Airlines
May 1
STL4:39 pmLambert-St Louis
16h 51m
2 stops
BHD3:30 pmBelfast City
May 12
BHD9:35 amBelfast City
15h 55m
1 stop
STL7:30 pmLambert-St Louis
$769
Find similar

Virgin Atlantic flights from St. Louis to Northern Ireland

Our best Virgin Atlantic deals on St. Louis to Northern Ireland flight tickets
Virgin Atlantic
Mar 1
STL11:21 amLambert-St Louis
23h 29m
2 stops
BHD4:50 pmBelfast City
Mar 5
BHD5:20 pmBelfast City
33h 21m
2 stops
STL8:41 pmLambert-St Louis
$746
Find similar
Virgin Atlantic
Mar 1
STL12:10 pmLambert-St Louis
22h 40m
2 stops
BHD4:50 pmBelfast City
Mar 5
BHD6:30 amBelfast City
17h 34m
2 stops
STL6:04 pmLambert-St Louis
$747
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 3, 2025.
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

5:04 pm-4:05 pm

2 stops17h 01m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$619

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

3:43 pm-2:15 pm

2 stops16h 32m

Belfast City

Sun 12/7

9:10 am-7:05 pm

2 stops15h 55m

$625

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

3:37 pm-2:15 pm

2 stops16h 38m

Belfast City

Tue 1/20

6:35 am-9:15 pm

2 stops20h 40m

$635

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

11:21 am-4:50 pm

2 stops23h 29m

Belfast City

Thu 3/5

5:20 pm-8:41 pm

2 stops33h 21m

$746

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

12:10 pm-4:50 pm

2 stops22h 40m

Belfast City

Thu 3/5

6:30 am-6:04 pm

2 stops17h 34m

$747

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 5/1

10:00 pm-3:30 pm

1 stop11h 30m

Belfast City

Tue 5/12

1:40 pm-7:30 pm

1 stop11h 50m

$749

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 5/1

10:00 pm-8:45 pm

1 stop16h 45m

Belfast City

Tue 5/12

1:40 pm-7:30 pm

1 stop11h 50m

$759

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 5/1

4:39 pm-3:30 pm

2 stops16h 51m

Belfast City

Tue 5/12

9:35 am-7:30 pm

1 stop15h 55m

$769

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Thu 3/12

12:15 pm-1:40 pm

2 stops20h 25m

Belfast Intl

Thu 3/26

6:25 pm-11:50 pm

2 stops34h 25m

$1,156

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 5/1

3:30 pm-8:25 pm

3 stops22h 55m

Belfast City

Tue 5/12

2:35 pm-1:30 pm

2 stops28h 55m

$1,615

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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?

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.
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  • 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?

  • 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 AirlinesPriceFrom $674Free CancellationRating
7.2
11,038 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

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Find better results for your trip to Northern Ireland

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