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Cheap flights from St. Louis to Belfast from $904

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
9:00 pm - 5:30 pmSTL  Lambert-St Louis-BHD Belfast City
14h 30m1 stop London Heathrow
British Airways Logo
9:35 am - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
15h 55m1 stop London Heathrow
$904British Airways
Mon, Apr 19 - Fri, Apr 23
Iberia Logo
10:25 am - 10:45 amSTL  Lambert-St Louis-BHD Belfast City
18h 20m2 stops Dallas/Fort Worth London Heathrow
Iberia Logo
6:45 am - 6:49 pmBHD  Belfast City-STL Lambert-St Louis
18h 04m2 stops London Heathrow Chicago O'Hare Intl
$969Iberia
Sun, Dec 6 - Tue, Dec 15
American Airlines Logo
2:00 pm - 10:50 amSTL  Lambert-St Louis-BHD Belfast City
14h 50m2 stops Charlotte Douglas London Heathrow
American Airlines Logo
6:30 am - 7:27 pmBHD  Belfast City-STL Lambert-St Louis
18h 57m2 stops London Heathrow Chicago O'Hare Intl
$1,035American Airlines
Tue, Dec 15 - Thu, Jan 14
British Airways Logo
5:21 pm - 5:30 pmSTL  Lambert-St Louis-BHD Belfast City
18h 09m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
6:30 am - 7:30 pmBHD  Belfast City-STL Lambert-St Louis
19h 00m1 stop London Heathrow
$1,148British Airways
Mon, Apr 12 - Fri, Apr 16
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
$1,156British Airways
Mon, Mar 1 - Wed, Mar 3
British Airways Logo
4:30 pm - 3:30 pmSTL  Lambert-St Louis-BHD Belfast City
17h 00m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
6:30 am - 4:00 pmBHD  Belfast City-STL Lambert-St Louis
15h 30m2 stops London Heathrow Chicago O'Hare Intl
$1,158British Airways
Mon, Apr 12 - Fri, Apr 16
Aer Lingus Logo
11:37 am - 1:10 pmSTL  Lambert-St Louis-BHD Belfast City
19h 33m3 stops Chicago O'Hare Intl Dublin Birmingham
Aer Lingus Logo
6:45 am - 10:17 pmBHD  Belfast City-STL Lambert-St Louis
21h 32m3 stops London City Dublin Chicago O'Hare Intl
$1,857Aer Lingus
Sun, Dec 6 - Tue, Dec 15
Multiple Airlines Logo
3:40 pm - 4:45 pmSTL  Lambert-St Louis-BHD Belfast City
19h 05m3 stops Frankfurt am Main Hamburg Amsterdam Schiphol
Multiple Airlines Logo
7:20 am - 12:12 amBHD  Belfast City-STL Lambert-St Louis
22h 52m2 stops London Gatwick Orlando
$2,058Multiple Airlines
Sun, Dec 6 - Tue, Dec 15
Multiple Airlines Logo
7:27 am - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
44h 38m3 stops Chicago O'Hare Intl Hong Kong Intl London Heathrow
Multiple Airlines Logo
11:05 am - 8:01 pmBHD  Belfast City-STL Lambert-St Louis
38h 56m3 stops London Heathrow Hong Kong Intl Dallas/Fort Worth
$13,778Multiple Airlines
Tue, Dec 15 - Thu, Jan 14

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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
Apr 19
STL9:00 pmLambert-St Louis
14h 30m
1 stop
BHD5:30 pmBelfast City
Apr 23
BHD9:35 amBelfast City
15h 55m
1 stop
STL7:30 pmLambert-St Louis
$904
British Airways
Apr 12
STL5:21 pmLambert-St Louis
18h 09m
2 stops
BHD5:30 pmBelfast City
Apr 16
BHD6:30 amBelfast City
19h 00m
1 stop
STL7:30 pmLambert-St Louis
$1,148
British Airways
Mar 1
STL2:21 pmLambert-St Louis
17h 54m
2 stops
BHD2:15 pmBelfast City
Mar 3
BHD5:35 pmBelfast City
31h 57m
2 stops
STL7:32 pmLambert-St Louis
$1,156

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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Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 4/19

9:00 pm-5:30 pm

1 stop14h 30m

Belfast City

Fri 4/23

9:35 am-7:30 pm

1 stop15h 55m

$904

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Sun 12/6

10:25 am-10:45 am

2 stops18h 20m

Belfast City

Tue 12/15

6:45 am-6:49 pm

2 stops18h 04m

$969

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Tue 12/15

2:00 pm-10:50 am

2 stops14h 50m

Belfast City

Thu 1/14

6:30 am-7:27 pm

2 stops18h 57m

$1,035

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 4/12

5:21 pm-5:30 pm

2 stops18h 09m

Belfast City

Fri 4/16

6:30 am-7:30 pm

1 stop19h 00m

$1,148

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

$1,156

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Mon 4/12

4:30 pm-3:30 pm

2 stops17h 00m

Belfast City

Fri 4/16

6:30 am-4:00 pm

2 stops15h 30m

$1,158

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Sun 12/6

11:37 am-1:10 pm

3 stops19h 33m

Belfast City

Tue 12/15

6:45 am-10:17 pm

3 stops21h 32m

$1,857

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Sun 12/6

3:40 pm-4:45 pm

3 stops19h 05m

Belfast City

Tue 12/15

7:20 am-12:12 am

2 stops22h 52m

$2,058

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Tue 12/15

7:27 am-10:05 am

3 stops44h 38m

Belfast City

Thu 1/14

11:05 am-8:01 pm

3 stops38h 56m

$13,778

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

$904

Fastest flight time

14h 30m

Direct flights

None
The best flight deal from St. Louis to Belfast found on momondo in the last 72 hours is $904
The fastest flight from St. Louis to Belfast takes 14h 30m
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 30m, 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