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

You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Belfast . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

How can I save money on flights from St. Louis to Belfast 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 aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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

Prices for flights from Lambert-St Louis Airport to Belfast are refreshed on a daily basis.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Belfast.

What documentation or ID do you need to fly to Belfast?

The travel and health documents required for your trip to Belfast 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 Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£493 Cheap Flights from St. Louis to Belfast in 2025/26

1 adult

0 bags

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Find the cheapest flights from St. Louis to Belfast

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

14:36 - 16:50STL-BHD

20h 14m2 stops

06:30 - 17:56BHD-STL

17h 26m2 stops

£493Multiple Airlines

Find Deal

Mon, 1 Dec - Sun, 7 Dec

12:10 - 16:50STL-BHD

22h 40m2 stops

06:30 - 23:10BHD-STL

22h 40m2 stops

£568Virgin Atlantic

Find Deal

Sun, 1 Mar - Thu, 5 Mar

14:36 - 14:15STL-BHD

18h 39m2 stops

06:35 - 23:32BHD-STL

22h 57m2 stops

£741American Airlines

Find Deal

Fri, 27 Mar - Tue, 31 Mar

19:03 - 15:40STL-BHD

14h 37m2 stops

06:35 - 19:30BHD-STL

18h 55m1 stop

£1,519British Airways

Find Deal

Mon, 27 Apr - Fri, 29 May

16:39 - 17:30STL-BHD

18h 51m2 stops

06:35 - 20:02BHD-STL

19h 27m2 stops

£1,523British Airways

Find Deal

Mon, 27 Apr - Fri, 29 May

British Airways flights from St. Louis to Belfast

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

British Airways

27 Apr

STL19:03Lambert-St Louis

14h 37m

2 stops

BHD15:40Belfast City

29 May

BHD06:35Belfast City

18h 55m

1 stop

STL19:30Lambert-St Louis

£1,519

Find similar

British Airways

27 Apr

STL16:39Lambert-St Louis

18h 51m

2 stops

BHD17:30Belfast City

29 May

BHD06:35Belfast City

19h 27m

2 stops

STL20:02Lambert-St Louis

£1,523

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

14:36-16:50

2 stops20h 14m

Belfast City

Sun 7/12

06:30-17:56

2 stops17h 26m

£493

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

12:10-16:50

2 stops22h 40m

Belfast City

Thu 5/3

06:30-23:10

2 stops22h 40m

£568

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 27/3

14:36-14:15

2 stops18h 39m

Belfast City

Tue 31/3

06:35-23:32

2 stops22h 57m

£741

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 27/4

19:03-15:40

2 stops14h 37m

Belfast City

Fri 29/5

06:35-19:30

1 stop18h 55m

£1,519

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 27/4

16:39-17:30

2 stops18h 51m

Belfast City

Fri 29/5

06:35-20:02

2 stops19h 27m

£1,523

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap St. Louis to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Belfast

Direct flights	None

There are no direct flights from St. Louis to Belfast. There are no popular flight routes from St. Louis to Belfast.

Search flight deals

How far is Lambert-St Louis to Belfast by plane?
Belfast is 3891.1 mi away from Lambert-St Louis. By plane, this route typically takes 14h 37m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Belfast?
Prices for flights from Lambert-St Louis Airport to Belfast are refreshed on a daily basis.
How old do you have to be to fly from Lambert-St Louis Airport to Belfast?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Belfast.
What documentation or ID do you need to fly to Belfast?
The travel and health documents required for your trip to Belfast 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 Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

How do I get Price Alerts for flights from St. Louis to Belfast?
You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Belfast. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from St. Louis to Belfast 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 aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Belfast. momondo saves you time and could save you money on your trip.

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

Flights from St. Louis to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Belfast.

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

Yes momondo offers price alerts on flights to Belfast from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.