How do I get Price Alerts for flights from St. Louis to Northern Ireland?

Search flight deals from St. Louis to Northern Ireland . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from St. Louis to Northern Ireland with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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 are updated daily.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Northern Ireland.

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

The travel and health documents required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£762 Cheap Flights from St. Louis to Northern Ireland in 2026

Find the cheapest flights from St. Louis to Northern Ireland

Return

Cheap return flights

Enter your travel dates to find the best prices.

17:18 - 15:30STL Lambert-St Louis-BHD Belfast City

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

06:30 - 19:18BHD Belfast City-STL Lambert-St Louis

18h 48m2 stops London Heathrow Charlotte Douglas

£762American Airlines

Mon, 28 Sep - Sun, 11 Oct

07:29 - 10:50STL Lambert-St Louis-BHD Belfast City

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

06:45 - 16:43BHD Belfast City-STL Lambert-St Louis

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

£851British Airways

Mon, 18 Jan - Fri, 22 Jan

13:49 - 12:55STL Lambert-St Louis-BHD Belfast City

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

06:30 - 19:30BHD Belfast City-STL Lambert-St Louis

19h 00m1 stop London Heathrow

£1,364British Airways

Mon, 28 Sep - Sun, 11 Oct

08:55 - 19:05STL Lambert-St Louis-BFS Belfast Intl

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

22:10 - 14:00BFS Belfast Intl-STL Lambert-St Louis

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

£2,301Multiple Airlines

Mon, 28 Sep - Sun, 11 Oct

15:34 - 19:40STL Lambert-St Louis-BHD Belfast City

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

13:10 - 23:59BHD Belfast City-STL Lambert-St Louis

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

£9,971Multiple Airlines

Mon, 28 Sep - Sun, 11 Oct

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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

18 Jan

STL07:29Lambert-St Louis

21h 21m

2 stops

BHD10:50Belfast City

22 Jan

BHD06:45Belfast City

15h 58m

2 stops

STL16:43Lambert-St Louis

£851

British Airways

28 Sept

STL13:49Lambert-St Louis

17h 06m

2 stops

BHD12:55Belfast City

11 Oct

BHD06:30Belfast City

19h 00m

1 stop

STL19:30Lambert-St Louis

£1,364

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 return flight

Fastest return journey

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 28/9

17:18-15:30

2 stops16h 12m

Belfast City

Sun 11/10

06:30-19:18

2 stops18h 48m

£762

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 18/1

07:29-10:50

2 stops21h 21m

Belfast City

Fri 22/1

06:45-16:43

2 stops15h 58m

£851

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 28/9

13:49-12:55

2 stops17h 06m

Belfast City

Sun 11/10

06:30-19:30

1 stop19h 00m

£1,364

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Mon 28/9

08:55-19:05

3 stops28h 10m

Belfast Intl

Sun 11/10

22:10-14:00

3 stops45h 50m

£2,301

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 28/9

15:34-19:40

3 stops46h 06m

Belfast City

Sun 11/10

13:10-23:59

3 stops40h 49m

£9,971

Flights are sorted by cheapest return 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	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 are updated daily.
How old do you have to be to fly from Lambert-St Louis Airport to Northern Ireland?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Northern Ireland.
What documentation or ID do you need to fly to Northern Ireland?
The travel and health documents required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

How do I get Price Alerts for flights from St. Louis to Northern Ireland?
Search flight deals from St. Louis to Northern Ireland. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from St. Louis to Northern Ireland with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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. momondo allows you to filter the results for St. Louis to Northern Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Northern Ireland?

momondo helps you find the best flight between St. Louis and Northern Ireland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Northern Ireland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Northern Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.