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Cheap flights from St. Louis to Belfast from $1,137

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 7/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.
Multiple Airlines Logo
5:42 pm - 4:55 pm
STL
-
BHD
17h 13m
2 stops
Multiple Airlines Logo
9:50 am - 9:56 pm
BHD
-
STL
18h 06m
2 stops
$1,137Multiple Airlines
Tue, Jul 7 - Sat, Jul 18
British Airways Logo
9:35 pm - 8:50 am
STL
-
BHD
29h 15m
1 stop
British Airways Logo
12:40 pm - 11:32 pm
BHD
-
STL
40h 52m
2 stops
$1,740British Airways
Tue, Jul 7 - Sat, Jul 18
Multiple Airlines Logo
9:35 pm - 8:50 am
STL
-
BHD
29h 15m
1 stop
Multiple Airlines Logo
7:05 pm - 7:30 pm
BHD
-
STL
30h 25m
1 stop
$1,859Multiple Airlines
Tue, Jul 7 - Sat, Jul 18
British Airways Logo
8:06 pm - 10:30 am
STL
-
BHD
32h 24m
2 stops
British Airways Logo
6:30 am - 7:20 pm
BHD
-
STL
18h 50m
2 stops
$2,242British Airways
Sat, Jul 18 - Wed, Jul 22
British Airways Logo
6:12 pm - 10:30 am
STL
-
BHD
34h 18m
2 stops
British Airways Logo
6:30 am - 7:30 pm
BHD
-
STL
19h 00m
1 stop
$2,551British Airways
Sat, Jul 18 - Wed, Jul 22
Multiple Airlines Logo
8:01 pm - 9:05 pm
STL
-
BHD
19h 04m
3 stops
Multiple Airlines Logo
6:10 pm - 7:24 pm
BHD
-
STL
31h 14m
3 stops
$3,482Multiple Airlines
Sat, Jul 18 - Wed, Jul 22

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
Jul 7
STL9:35 pmLambert-St Louis
29h 15m
1 stop
BHD8:50 amBelfast City
Jul 18
BHD12:40 pmBelfast City
40h 52m
2 stops
STL11:32 pmLambert-St Louis
$1,740
British Airways
Jul 18
STL8:06 pmLambert-St Louis
32h 24m
2 stops
BHD10:30 amBelfast City
Jul 22
BHD6:30 amBelfast City
18h 50m
2 stops
STL7:20 pmLambert-St Louis
$2,242
British Airways
Jul 18
STL6:12 pmLambert-St Louis
34h 18m
2 stops
BHD10:30 amBelfast City
Jul 22
BHD6:30 amBelfast City
19h 00m
1 stop
STL7:30 pmLambert-St Louis
$2,551

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 March 28, 2026.
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

Cheapest round-trip
Quickest round-trip

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

5:42 pm-4:55 pm

2 stops17h 13m

Belfast City

Sat 7/18

9:50 am-9:56 pm

2 stops18h 06m

$1,137

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

9:35 pm-8:50 am

1 stop29h 15m

Belfast City

Sat 7/18

12:40 pm-11:32 pm

2 stops40h 52m

$1,740

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/7

9:35 pm-8:50 am

1 stop29h 15m

Belfast City

Sat 7/18

7:05 pm-7:30 pm

1 stop30h 25m

$1,859

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 7/18

8:06 pm-10:30 am

2 stops32h 24m

Belfast City

Wed 7/22

6:30 am-7:20 pm

2 stops18h 50m

$2,242

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 7/18

6:12 pm-10:30 am

2 stops34h 18m

Belfast City

Wed 7/22

6:30 am-7:30 pm

1 stop19h 00m

$2,551

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 7/18

8:01 pm-9:05 pm

3 stops19h 04m

Belfast City

Wed 7/22

6:10 pm-7:24 pm

3 stops31h 14m

$3,482

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 13m

Direct flights

None
The fastest flight from St. Louis to Belfast City Airport takes 17h 13m
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 17h 13m.

  • 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.

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