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Cheap flights from St. Louis to Belfast from $576

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Belfast departing on 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
5:04 pm - 4:05 pmSTL-BHD
17h 01m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$576British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
British Airways Logo
1:40 pm - 11:10 amSTL-BHD
15h 30m2 stops
British Airways Logo
6:35 am - 10:44 pmBHD-STL
22h 09m2 stops
$623British Airways
Find Deal
Sat, Jan 24 - Sat, Jan 31
Delta Logo
11:23 am - 4:50 pmSTL-BHD
23h 27m2 stops
Delta Logo
6:30 am - 8:43 pmBHD-STL
43h 13m2 stops
$652Delta
Find Deal
Wed, Mar 4 - Mon, Mar 16
Delta Logo
11:23 am - 9:00 pmSTL-BHD
27h 37m2 stops
Delta Logo
6:30 am - 8:41 pmBHD-STL
19h 11m2 stops
$702Delta
Find Deal
Thu, Mar 5 - Thu, Mar 12
British Airways Logo
6:00 am - 10:30 amSTL-BHD
22h 30m2 stops
British Airways Logo
6:45 am - 5:59 pmBHD-STL
16h 14m2 stops
$709British Airways
Find Deal
Fri, Mar 6 - Fri, Mar 13
British Airways Logo
6:33 pm - 1:30 pmSTL-BHD
36h 57m2 stops
British Airways Logo
3:05 pm - 11:48 pmBHD-STL
37h 43m2 stops
$719British Airways
Find Deal
Sat, Mar 7 - Sat, Mar 14
Delta Logo
10:12 am - 4:50 pmSTL-BHD
24h 38m2 stops
Delta Logo
6:30 am - 8:41 pmBHD-STL
19h 11m2 stops
$730Delta
Find Deal
Wed, Mar 4 - Fri, Mar 13
Delta Logo
6:59 pm - 9:00 pmSTL-BHD
21h 01m2 stops
Delta Logo
6:30 am - 9:10 pmBHD-STL
19h 40m2 stops
$747Delta
Find Deal
Mon, Mar 9 - Thu, Mar 12
Delta Logo
1:10 pm - 9:00 pmSTL-BHD
25h 50m2 stops
Delta Logo
6:30 am - 8:43 pmBHD-STL
43h 13m2 stops
$752Delta
Find Deal
Thu, Mar 5 - Sun, Mar 15
Virgin Atlantic Logo
5:04 pm - 4:50 pmSTL-BHD
17h 46m2 stops
Virgin Atlantic Logo
5:20 pm - 8:43 pmBHD-STL
33h 23m2 stops
$757Virgin Atlantic
Find Deal
Wed, Feb 11 - Sun, Feb 15

British Airways flights from St. Louis to Belfast City Airport

Our best British Airways deals on St. Louis to Belfast City Airport flight tickets
British Airways
Jan 12
STL6:44 pmLambert-St Louis
17h 51m
2 stops
BHD6:35 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$576
Find similar
British Airways
Jan 24
STL1:40 pmLambert-St Louis
15h 30m
2 stops
BHD11:10 amBelfast City
Jan 31
BHD6:35 amBelfast City
22h 09m
2 stops
STL10:44 pmLambert-St Louis
$623
Find similar
British Airways
Mar 6
STL6:00 amLambert-St Louis
22h 30m
2 stops
BHD10:30 amBelfast City
Mar 13
BHD6:45 amBelfast City
16h 14m
2 stops
STL5:59 pmLambert-St Louis
$709
Find similar

Delta flights from St. Louis to Belfast City Airport

Our best Delta deals on St. Louis to Belfast City Airport flight tickets
Delta
Mar 4
STL11:23 amLambert-St Louis
23h 27m
2 stops
BHD4:50 pmBelfast City
Mar 16
BHD6:30 amBelfast City
43h 13m
2 stops
STL8:43 pmLambert-St Louis
$652
Find similar
Delta
Mar 5
STL11:23 amLambert-St Louis
27h 37m
2 stops
BHD9:00 pmBelfast City
Mar 16
BHD6:30 amBelfast City
43h 13m
2 stops
STL8:43 pmLambert-St Louis
$702
Find similar
Delta
Mar 4
STL10:12 amLambert-St Louis
24h 38m
2 stops
BHD4:50 pmBelfast City
Mar 13
BHD6:30 amBelfast City
19h 11m
2 stops
STL8:41 pmLambert-St Louis
$730
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Belfast City Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 1, 2025.
Use the filters below to find and compare flights from St. Louis to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

5:04 pm-4:05 pm

2 stops17h 01m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$576

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 1/24

1:40 pm-11:10 am

2 stops15h 30m

Belfast City

Sat 1/31

6:35 am-10:44 pm

2 stops22h 09m

$623

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 3/4

11:23 am-4:50 pm

2 stops23h 27m

Belfast City

Mon 3/16

6:30 am-8:43 pm

2 stops43h 13m

$652

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 3/5

11:23 am-9:00 pm

2 stops27h 37m

Belfast City

Thu 3/12

6:30 am-8:41 pm

2 stops19h 11m

$702

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 3/6

6:00 am-10:30 am

2 stops22h 30m

Belfast City

Fri 3/13

6:45 am-5:59 pm

2 stops16h 14m

$709

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 3/7

6:33 pm-1:30 pm

2 stops36h 57m

Belfast City

Sat 3/14

3:05 pm-11:48 pm

2 stops37h 43m

$719

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 3/4

10:12 am-4:50 pm

2 stops24h 38m

Belfast City

Fri 3/13

6:30 am-8:41 pm

2 stops19h 11m

$730

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 3/9

6:59 pm-9:00 pm

2 stops21h 01m

Belfast City

Thu 3/12

6:30 am-9:10 pm

2 stops19h 40m

$747

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 3/5

1:10 pm-9:00 pm

2 stops25h 50m

Belfast City

Sun 3/15

6:30 am-8:43 pm

2 stops43h 13m

$752

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/11

5:04 pm-4:50 pm

2 stops17h 46m

Belfast City

Sun 2/15

5:20 pm-8:43 pm

2 stops33h 23m

$757

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Belfast City Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Belfast City Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Belfast City Airport (STL to BHD) flight deals and tips

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

Fastest flight time

17h 01m

Direct flights

None
The fastest flight from St. Louis to Belfast City Airport takes 17h 01m
There are no direct flights from St. Louis to Belfast City Airport. There are no popular flight routes from St. Louis to Belfast City Airport.
Search flight deals

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

    A flight from Lambert-St Louis to Belfast City will travel around 3892.8 mi. A reasonable flight in good conditions will take 13h 42m.

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

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

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

    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 City Airport.

  • What documentation or ID do you need to fly to Belfast City Airport?

    The travel and health documents required for your trip to Belfast City Airport 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 City Airport. 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 City Airport?

    Price Alerts will notify you by email when the price for flights to Belfast City Airport 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 City Airport 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.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Newcastle
Bangor

Why use momondo?

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

It is quick and easy to find St. Louis to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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?

momondo helps you find the best flight between St. Louis and Belfast 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 Belfast right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from St. Louis and alert you when they change.

An easier way to manage your Belfast City Airport trip

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