Latest deals
When to book
FAQs
Price Alerts

Cheap flights from St. Louis to Belfast from $782

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 2/25. 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
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
4:05 pm - 2:15 pm
STL
-
BHD
16h 10m
2 stops
American Airlines Logo
9:10 am - 9:12 pm
BHD
-
STL
18h 02m
2 stops
$782American Airlines
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
10:37 am - 10:15 am
STL
-
BHD
17h 38m
2 stops
British Airways Logo
8:25 pm - 11:48 pm
BHD
-
STL
33h 23m
2 stops
$1,039British Airways
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
11:59 am - 9:10 am
STL
-
BHD
15h 11m
2 stops
British Airways Logo
12:10 pm - 11:48 pm
BHD
-
STL
17h 38m
2 stops
$1,090British Airways
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
8:00 am - 10:15 am
STL
-
BHD
20h 15m
2 stops
British Airways Logo
10:40 am - 11:48 pm
BHD
-
STL
19h 08m
2 stops
$1,092British Airways
Wed, Feb 25 - Sun, Mar 1
Multiple Airlines Logo
4:05 pm - 6:25 pm
STL
-
BHD
20h 20m
3 stops
Multiple Airlines Logo
4:55 pm - 3:29 pm
BHD
-
STL
28h 34m
3 stops
$2,264Multiple Airlines
Wed, Feb 25 - Sun, Mar 1

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
Feb 25
STL10:37 amLambert-St Louis
17h 38m
2 stops
BHD10:15 amBelfast City
Mar 1
BHD8:25 pmBelfast City
33h 23m
2 stops
STL11:48 pmLambert-St Louis
$1,039
British Airways
Feb 25
STL11:59 amLambert-St Louis
15h 11m
2 stops
BHD9:10 amBelfast City
Mar 1
BHD12:10 pmBelfast City
17h 38m
2 stops
STL11:48 pmLambert-St Louis
$1,090
British Airways
Feb 25
STL8:00 amLambert-St Louis
20h 15m
2 stops
BHD10:15 amBelfast City
Mar 1
BHD10:40 amBelfast City
19h 08m
2 stops
STL11:48 pmLambert-St Louis
$1,092

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 February 5, 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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

4:05 pm-2:15 pm

2 stops16h 10m

Belfast City

Sun 3/1

9:10 am-9:12 pm

2 stops18h 02m

$782

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

10:37 am-10:15 am

2 stops17h 38m

Belfast City

Sun 3/1

8:25 pm-11:48 pm

2 stops33h 23m

$1,039

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

11:59 am-9:10 am

2 stops15h 11m

Belfast City

Sun 3/1

12:10 pm-11:48 pm

2 stops17h 38m

$1,090

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

8:00 am-10:15 am

2 stops20h 15m

Belfast City

Sun 3/1

10:40 am-11:48 pm

2 stops19h 08m

$1,092

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/25

4:05 pm-6:25 pm

3 stops20h 20m

Belfast City

Sun 3/1

4:55 pm-3:29 pm

3 stops28h 34m

$2,264

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

14h 00m

Direct flights

None
The fastest flight from St. Louis to Belfast City Airport takes 14h 00m
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 14h 00m.

  • 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 3/7
Sat 3/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $337
Flights to London Gatwick Airportfrom $352
Flights to London City Airportfrom $472
Flights to London Stansted Airportfrom $336
Flights to London Luton Airportfrom $341
Flights to Glasgow Intl Airportfrom $359
Flights to Belfast Intl Airportfrom $465
Flights to London Southend Airportfrom $449