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Cheap flights from St. Louis to Belfast from $996

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:35 pm - 6:10 pmSTL  Lambert-St Louis-BHD Belfast City
14h 35m1 stop London Heathrow
British Airways Logo
6:30 am - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
19h 00m1 stop London Heathrow
$996British Airways
Fri, Oct 16 - Wed, Oct 21
British Airways Logo
5:27 pm - 6:10 pmSTL  Lambert-St Louis-BHD Belfast City
18h 43m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
6:30 am - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
19h 00m1 stop London Heathrow
$1,000British Airways
Fri, Oct 16 - Wed, Oct 21
British Airways Logo
5:27 pm - 6:10 pmSTL  Lambert-St Louis-BHD Belfast City
18h 43m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
8:35 pm - 7:18 pmBHD  Belfast City-STL Lambert-St Louis
28h 43m2 stops London Heathrow Charlotte Douglas
$1,010British Airways
Fri, Oct 16 - Wed, Oct 21
Multiple Airlines Logo
2:40 pm - 4:30 pmSTL  Lambert-St Louis-BFS Belfast Intl
19h 50m2 stops Toronto Pearson Intl Edinburgh Turnhouse
Multiple Airlines Logo
9:35 pm - 6:41 pmBFS  Belfast Intl-STL Lambert-St Louis
27h 06m3 stops London Gatwick Zurich Montreal Pierre Elliott Trudeau Intl
$1,248Multiple Airlines
Fri, Oct 16 - Wed, Oct 21
Multiple Airlines Logo
2:40 pm - 3:00 pmSTL  Lambert-St Louis-BHD Belfast City
18h 20m2 stops Toronto Pearson Intl Edinburgh Turnhouse
Multiple Airlines Logo
6:50 pm - 6:41 pmBHD  Belfast City-STL Lambert-St Louis
29h 51m3 stops London Gatwick Zurich Montreal Pierre Elliott Trudeau Intl
$1,291Multiple Airlines
Fri, Oct 16 - Wed, Oct 21
Multiple Airlines Logo
8:55 am - 4:30 pmSTL  Lambert-St Louis-BFS Belfast Intl
25h 35m2 stops Toronto Pearson Intl Edinburgh Turnhouse
Multiple Airlines Logo
6:10 am - 8:20 pmBFS  Belfast Intl-STL Lambert-St Louis
20h 10m2 stops London Gatwick Toronto Pearson Intl
$1,299Multiple Airlines
Fri, Oct 16 - Wed, Oct 21
Multiple Airlines Logo
2:40 pm - 1:50 pmSTL  Lambert-St Louis-BHD Belfast City
17h 10m3 stops Toronto Pearson Intl Brussels Bruxelles-National Manchester
Multiple Airlines Logo
6:50 pm - 6:41 pmBHD  Belfast City-STL Lambert-St Louis
29h 51m3 stops London Gatwick Zurich Montreal Pierre Elliott Trudeau Intl
$1,301Multiple Airlines
Fri, Oct 16 - Wed, Oct 21
British Airways Logo
1:15 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
15h 35m2 stops Philadelphia London Heathrow
British Airways Logo
5:35 pm - 8:33 pmBHD  Belfast City-STL Lambert-St Louis
32h 58m2 stops London Heathrow Philadelphia
$1,481British Airways
Mon, Nov 16 - Wed, Nov 18
British Airways Logo
1:15 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
15h 35m2 stops Philadelphia London Heathrow
British Airways Logo
5:35 pm - 8:33 pmBHD  Belfast City-STL Lambert-St Louis
32h 58m2 stops London Heathrow Philadelphia
$1,482British Airways
Mon, Nov 16 - Wed, Nov 18
British Airways Logo
1:15 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
15h 35m2 stops Philadelphia London Heathrow
British Airways Logo
5:35 pm - 8:33 pmBHD  Belfast City-STL Lambert-St Louis
32h 58m2 stops London Heathrow Philadelphia
$1,483British Airways
Mon, Nov 16 - Wed, Nov 18

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British Airways flights from St. Louis to Belfast

Our best British Airways deals on St. Louis to Belfast flight tickets
British Airways
Oct 16
STL9:35 pmLambert-St Louis
14h 35m
1 stop
BHD6:10 pmBelfast City
Oct 21
BHD6:30 amBelfast City
19h 00m
1 stop
STL7:30 pmLambert-St Louis
$996
British Airways
Oct 16
STL5:27 pmLambert-St Louis
18h 43m
2 stops
BHD6:10 pmBelfast City
Oct 21
BHD6:30 amBelfast City
19h 00m
1 stop
STL7:30 pmLambert-St Louis
$1,000
British Airways
Oct 16
STL5:27 pmLambert-St Louis
18h 43m
2 stops
BHD6:10 pmBelfast City
Oct 21
BHD8:35 pmBelfast City
28h 43m
2 stops
STL7:18 pmLambert-St Louis
$1,010

momondo Fare Finder

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

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Route

Depart

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Price

Cheapest round-trip
Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/16

9:35 pm-6:10 pm

1 stop14h 35m

Belfast City

Wed 10/21

6:30 am-7:30 pm

1 stop19h 00m

$996

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/16

5:27 pm-6:10 pm

2 stops18h 43m

Belfast City

Wed 10/21

6:30 am-7:30 pm

1 stop19h 00m

$1,000

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/16

5:27 pm-6:10 pm

2 stops18h 43m

Belfast City

Wed 10/21

8:35 pm-7:18 pm

2 stops28h 43m

$1,010

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Fri 10/16

2:40 pm-4:30 pm

2 stops19h 50m

Belfast Intl

Wed 10/21

9:35 pm-6:41 pm

3 stops27h 06m

$1,248

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/16

2:40 pm-3:00 pm

2 stops18h 20m

Belfast City

Wed 10/21

6:50 pm-6:41 pm

3 stops29h 51m

$1,291

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Fri 10/16

8:55 am-4:30 pm

2 stops25h 35m

Belfast Intl

Wed 10/21

6:10 am-8:20 pm

2 stops20h 10m

$1,299

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/16

2:40 pm-1:50 pm

3 stops17h 10m

Belfast City

Wed 10/21

6:50 pm-6:41 pm

3 stops29h 51m

$1,301

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

1:15 pm-10:50 am

2 stops15h 35m

Belfast City

Wed 11/18

5:35 pm-8:33 pm

2 stops32h 58m

$1,481

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

1:15 pm-10:50 am

2 stops15h 35m

Belfast City

Wed 11/18

5:35 pm-8:33 pm

2 stops32h 58m

$1,482

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

1:15 pm-10:50 am

2 stops15h 35m

Belfast City

Wed 11/18

5:35 pm-8:33 pm

2 stops32h 58m

$1,483

Flights are sorted by cheapest round-trip 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

Best Price Found

$996

Fastest flight time

15h 35m

Direct flights

None
The best flight deal from St. Louis to Belfast found on momondo in the last 72 hours is $996
The fastest flight from St. Louis to Belfast takes 15h 35m
There are no direct flights from St. Louis to Belfast. There are no popular flight routes from St. Louis to Belfast.
Search flight deals

Frequently asked questions about flying from St. Louis to Belfast

  • How far is Lambert-St Louis to Belfast by plane?

    The straight-line distance from Lambert-St Louis to Belfast is 3891.1 mi. Flights usually cover this in 15h 35m, depending on flying conditions and air traffic around both airports.

  • 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?

    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 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.

Frequently asked questions about flying from St. Louis to Belfast

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

    Price Alerts will notify you by email when the price for flights to Belfast from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from St. Louis to Belfast with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Belfast from St. Louis.

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

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

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

Once all potential St. Louis to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Belfast Intl Airport
Belfast City Airport