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.

£851 Cheap Flights from St. Louis to Northern Ireland in 2026/27

Find the cheapest flights from St. Louis to Northern Ireland

Return

Cheap return flights

Enter your travel dates to find the best prices.

14:19 - 10:50STL Lambert-St Louis-BHD Belfast City

14h 31m2 stops Chicago O'Hare Intl London Heathrow

15:45 - 19:27BHD Belfast City-STL Lambert-St Louis

33h 42m2 stops London Heathrow Chicago O'Hare Intl

£851British Airways

Mon, 1 Mar - Wed, 3 Mar

14:19 - 14:15STL Lambert-St Louis-BHD Belfast City

17h 56m2 stops Chicago O'Hare Intl London Heathrow

17:35 - 19:27BHD Belfast City-STL Lambert-St Louis

31h 52m2 stops London Heathrow Chicago O'Hare Intl

£852British Airways

Mon, 1 Mar - Wed, 3 Mar

14:19 - 14:15STL Lambert-St Louis-BHD Belfast City

17h 56m2 stops Chicago O'Hare Intl London Heathrow

17:35 - 19:27BHD Belfast City-STL Lambert-St Louis

31h 52m2 stops London Heathrow Chicago O'Hare Intl

£860British Airways

Mon, 1 Mar - Wed, 3 Mar

09:50 - 10:50STL Lambert-St Louis-BHD Belfast City

19h 00m2 stops Boston Logan Intl London Heathrow

11:40 - 23:59BHD Belfast City-STL Lambert-St Louis

18h 19m2 stops London Heathrow Chicago O'Hare Intl

£1,119British Airways

Mon, 16 Nov - Wed, 18 Nov

11:35 - 15:55STL Lambert-St Louis-BHD Belfast City

22h 20m2 stops Chicago O'Hare Intl London Heathrow

17:35 - 00:01BHD Belfast City-STL Lambert-St Louis

36h 26m2 stops London Heathrow Chicago O'Hare Intl

£1,220British Airways

Mon, 16 Nov - Wed, 18 Nov

11:35 - 15:55STL Lambert-St Louis-BHD Belfast City

22h 20m2 stops Chicago O'Hare Intl London Heathrow

17:35 - 00:01BHD Belfast City-STL Lambert-St Louis

36h 26m2 stops London Heathrow Chicago O'Hare Intl

£1,228British Airways

Mon, 16 Nov - Wed, 18 Nov

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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

1 Mar

STL14:19Lambert-St Louis

14h 31m

2 stops

BHD10:50Belfast City

3 Mar

BHD15:45Belfast City

33h 42m

2 stops

STL19:27Lambert-St Louis

£851

British Airways

1 Mar

STL14:19Lambert-St Louis

17h 56m

2 stops

BHD14:15Belfast City

3 Mar

BHD17:35Belfast City

31h 52m

2 stops

STL19:27Lambert-St Louis

£852

British Airways

1 Mar

STL14:19Lambert-St Louis

17h 56m

2 stops

BHD14:15Belfast City

3 Mar

BHD17:35Belfast City

31h 52m

2 stops

STL19:27Lambert-St Louis

£860

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

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 1/3

14:19-10:50

2 stops14h 31m

Belfast City

Wed 3/3

15:45-19:27

2 stops33h 42m

£851

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 1/3

14:19-14:15

2 stops17h 56m

Belfast City

Wed 3/3

17:35-19:27

2 stops31h 52m

£852

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 1/3

14:19-14:15

2 stops17h 56m

Belfast City

Wed 3/3

17:35-19:27

2 stops31h 52m

£860

Fastest return journey

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 16/11

09:50-10:50

2 stops19h 00m

Belfast City

Wed 18/11

11:40-23:59

2 stops18h 19m

£1,119

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 16/11

11:35-15:55

2 stops22h 20m

Belfast City

Wed 18/11

17:35-00:01

2 stops36h 26m

£1,220

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 16/11

11:35-15:55

2 stops22h 20m

Belfast City

Wed 18/11

17:35-00:01

2 stops36h 26m

£1,228

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

Best price found	£851
Fastest flight time	17h 56m
Direct flights	None

The best flight deal from St. Louis to Northern Ireland found on momondo in the last 72 hours is £851

The fastest flight from St. Louis to Northern Ireland takes 17h 56m

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.