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Cheap flights from St. Louis to Belfast from $894

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.
KLM Logo
3:25 pm - 4:50 pmSTL  Lambert-St Louis-BHD Belfast City
19h 25m2 stops Minneapolis St Paul Amsterdam Schiphol
KLM Logo
9:40 am - 8:49 pmBHD  Belfast City-STL Lambert-St Louis
17h 09m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$894KLM
Fri, Jan 1 - Thu, Jan 14
British Airways Logo
11:01 am - 6:10 pmSTL  Lambert-St Louis-BHD Belfast City
25h 09m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
7:05 pm - 8:57 pmBHD  Belfast City-STL Lambert-St Louis
31h 52m2 stops London Heathrow Chicago O'Hare Intl
$1,033British Airways
Fri, Oct 2 - Sat, Oct 10
British Airways Logo
11:31 am - 2:15 pmSTL  Lambert-St Louis-BHD Belfast City
20h 44m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
5:35 pm - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
31h 55m2 stops London Heathrow Charlotte Douglas
$1,153British Airways
Mon, Mar 1 - Wed, Mar 3
British Airways Logo
11:34 am - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
17h 16m2 stops Boston Logan Intl London Heathrow
British Airways Logo
5:35 pm - 11:58 pmBHD  Belfast City-STL Lambert-St Louis
36h 23m2 stops London Heathrow Chicago O'Hare Intl
$1,173British Airways
Mon, Mar 1 - Wed, Mar 3
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
$1,501British 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
$1,502British Airways
Mon, Nov 16 - Wed, Nov 18
Multiple Airlines Logo
4:05 pm - 10:15 pmSTL  Lambert-St Louis-BFS Belfast Intl
25h 10m3 stops Toronto Pearson Intl Zurich Birmingham
Multiple Airlines Logo
9:05 pm - 1:45 pmBFS  Belfast Intl-STL Lambert-St Louis
22h 40m2 stops Manchester Frankfurt am Main
$1,510Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
4:05 pm - 1:40 pmSTL  Lambert-St Louis-BFS Belfast Intl
16h 35m2 stops Toronto Pearson Intl Amsterdam Schiphol
Multiple Airlines Logo
9:05 pm - 1:45 pmBFS  Belfast Intl-STL Lambert-St Louis
22h 40m2 stops Manchester Frankfurt am Main
$1,692Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
British Airways Logo
5:18 pm - 6:10 pmSTL  Lambert-St Louis-BHD Belfast City
18h 52m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
7:05 pm - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
30h 25m1 stop London Heathrow
$1,872British Airways
Fri, Oct 2 - Sat, Oct 10

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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 2
STL11:01 amLambert-St Louis
25h 09m
2 stops
BHD6:10 pmBelfast City
Oct 10
BHD7:05 pmBelfast City
31h 52m
2 stops
STL8:57 pmLambert-St Louis
$1,033
British Airways
Mar 1
STL11:31 amLambert-St Louis
20h 44m
2 stops
BHD2:15 pmBelfast City
Mar 3
BHD5:35 pmBelfast City
31h 55m
2 stops
STL7:30 pmLambert-St Louis
$1,153
British Airways
Mar 1
STL11:34 amLambert-St Louis
17h 16m
2 stops
BHD10:50 amBelfast City
Mar 3
BHD5:35 pmBelfast City
36h 23m
2 stops
STL11:58 pmLambert-St Louis
$1,173

KLM flights from St. Louis to Belfast

Our best KLM deals on St. Louis to Belfast flight tickets
KLM
Jan 1
STL3:25 pmLambert-St Louis
19h 25m
2 stops
BHD4:50 pmBelfast City
Jan 14
BHD9:40 amBelfast City
17h 09m
2 stops
STL8:49 pmLambert-St Louis
$894
KLM
Sep 17
STL10:29 amLambert-St Louis
16h 51m
2 stops
BHD9:20 amBelfast City
Sep 19
BHD5:30 pmBelfast City
32h 28m
2 stops
STL7:58 pmLambert-St Louis
$1,524

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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Price

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Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 1/1

3:25 pm-4:50 pm

2 stops19h 25m

Belfast City

Thu 1/14

9:40 am-8:49 pm

2 stops17h 09m

$894

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/2

11:01 am-6:10 pm

2 stops25h 09m

Belfast City

Sat 10/10

7:05 pm-8:57 pm

2 stops31h 52m

$1,033

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 3/1

11:31 am-2:15 pm

2 stops20h 44m

Belfast City

Wed 3/3

5:35 pm-7:30 pm

2 stops31h 55m

$1,153

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 3/1

11:34 am-10:50 am

2 stops17h 16m

Belfast City

Wed 3/3

5:35 pm-11:58 pm

2 stops36h 23m

$1,173

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

$1,501

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

$1,502

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Thu 10/29

4:05 pm-10:15 pm

3 stops25h 10m

Belfast Intl

Thu 11/5

9:05 pm-1:45 pm

2 stops22h 40m

$1,510

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Thu 10/29

4:05 pm-1:40 pm

2 stops16h 35m

Belfast Intl

Thu 11/5

9:05 pm-1:45 pm

2 stops22h 40m

$1,692

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Fri 10/2

5:18 pm-6:10 pm

2 stops18h 52m

Belfast City

Sat 10/10

7:05 pm-7:30 pm

1 stop30h 25m

$1,872

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

$894

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 $894
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