Latest deals
FAQs
Price Alerts

Cheap flights from St. Louis to Belfast from $1,149

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
2:21 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
14h 29m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
3:45 pm - 7:32 pmBHD  Belfast City-STL Lambert-St Louis
33h 47m2 stops London Heathrow Chicago O'Hare Intl
$1,149British Airways
Mon, Mar 1 - Wed, Mar 3
British Airways Logo
2:21 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
14h 29m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
3:45 pm - 7:32 pmBHD  Belfast City-STL Lambert-St Louis
33h 47m2 stops London Heathrow Chicago O'Hare Intl
$1,150British Airways
Mon, Mar 1 - Wed, Mar 3
British Airways Logo
2:21 pm - 2:15 pmSTL  Lambert-St Louis-BHD Belfast City
17h 54m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
5:35 pm - 7:32 pmBHD  Belfast City-STL Lambert-St Louis
31h 57m2 stops London Heathrow Chicago O'Hare Intl
$1,151British Airways
Mon, Mar 1 - Wed, Mar 3
British Airways Logo
11:35 am - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
17h 15m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
12:20 pm - 10:15 pmBHD  Belfast City-STL Lambert-St Louis
15h 55m2 stops London Heathrow Chicago O'Hare Intl
$1,641British Airways
Mon, Nov 16 - Wed, Nov 18
British Airways Logo
11:35 am - 3:55 pmSTL  Lambert-St Louis-BHD Belfast City
22h 20m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
5:35 pm - 12:01 amBHD  Belfast City-STL Lambert-St Louis
36h 26m2 stops London Heathrow Chicago O'Hare Intl
$1,642British Airways
Mon, Nov 16 - Wed, Nov 18
British Airways Logo
9:50 am - 9:05 amSTL  Lambert-St Louis-BHD Belfast City
17h 15m2 stops Boston Logan Intl London Heathrow
British Airways Logo
3:45 pm - 8:33 pmBHD  Belfast City-STL Lambert-St Louis
34h 48m2 stops London Heathrow Philadelphia
$1,643British Airways
Mon, Nov 16 - Wed, Nov 18

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

British Airways flights from St. Louis to Belfast

Our best British Airways deals on St. Louis to Belfast flight tickets
British Airways
Mar 31
STL9:35 pmLambert-St Louis
15h 10m
1 stop
BHD6:45 pmBelfast City
Apr 12
BHD6:30 pmBelfast City
31h 00m
1 stop
STL7:30 pmLambert-St Louis
$874
British Airways
Mar 31
STL2:23 pmLambert-St Louis
17h 12m
2 stops
BHD1:35 pmBelfast City
Apr 12
BHD6:30 pmBelfast City
31h 00m
1 stop
STL7:30 pmLambert-St Louis
$878
British Airways
Mar 31
STL2:21 pmLambert-St Louis
15h 39m
2 stops
BHD12:00 pmBelfast City
Apr 12
BHD7:35 pmBelfast City
29h 52m
2 stops
STL7:27 pmLambert-St Louis
$910

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 3/1

2:21 pm-10:50 am

2 stops14h 29m

Belfast City

Wed 3/3

3:45 pm-7:32 pm

2 stops33h 47m

$1,149

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 3/1

2:21 pm-10:50 am

2 stops14h 29m

Belfast City

Wed 3/3

3:45 pm-7:32 pm

2 stops33h 47m

$1,150

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 3/1

2:21 pm-2:15 pm

2 stops17h 54m

Belfast City

Wed 3/3

5:35 pm-7:32 pm

2 stops31h 57m

$1,151
Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

11:35 am-10:50 am

2 stops17h 15m

Belfast City

Wed 11/18

12:20 pm-10:15 pm

2 stops15h 55m

$1,641

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

11:35 am-3:55 pm

2 stops22h 20m

Belfast City

Wed 11/18

5:35 pm-12:01 am

2 stops36h 26m

$1,642

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 11/16

9:50 am-9:05 am

2 stops17h 15m

Belfast City

Wed 11/18

3:45 pm-8:33 pm

2 stops34h 48m

$1,643

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

$1,149

Fastest flight time

14h 29m

Direct flights

None
The best flight deal from St. Louis to Belfast found on momondo in the last 72 hours is $1,149
The fastest flight from St. Louis to Belfast takes 14h 29m
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 14h 29m, 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.

An easier way to manage your Belfast 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
Sun 11/29
Sun 12/6
By creating a price alert you accept our terms of use and privacy policy.

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