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Cheap flights from St. Louis to Belfast from $365

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 - 1:15 pmSTL  Lambert-St Louis-BHD Belfast City
16h 54m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
11:40 am - 10:23 pmBHD  Belfast City-STL Lambert-St Louis
16h 43m2 stops London Heathrow Chicago O'Hare Intl
$887British Airways
Wed, Feb 17 - Tue, Feb 23
British Airways Logo
1:43 pm - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
14h 22m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
7:30 pm - 11:31 pmBHD  Belfast City-STL Lambert-St Louis
34h 01m2 stops London Heathrow Philadelphia
$983British Airways
Wed, Dec 9 - Tue, Dec 22
American Airlines Logo
1:43 pm - 11:30 amSTL  Lambert-St Louis-BHD Belfast City
15h 47m2 stops Chicago O'Hare Intl London Heathrow
American Airlines Logo
6:30 am - 8:31 pmBHD  Belfast City-STL Lambert-St Louis
20h 01m2 stops London Heathrow Philadelphia
$1,032American Airlines
Tue, Dec 15 - Thu, Jan 14
British Airways Logo
10:30 am - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
17h 35m2 stops Boston Logan Intl London Heathrow
British Airways Logo
11:50 am - 10:30 pmBHD  Belfast City-STL Lambert-St Louis
16h 40m2 stops London Heathrow Chicago O'Hare Intl
$1,154British Airways
Wed, Mar 3 - Fri, Mar 5
British Airways Logo
10:30 am - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
17h 35m2 stops Boston Logan Intl London Heathrow
British Airways Logo
11:50 am - 10:30 pmBHD  Belfast City-STL Lambert-St Louis
16h 40m2 stops London Heathrow Chicago O'Hare Intl
$1,155British Airways
Wed, Mar 3 - Fri, Mar 5
British Airways Logo
2:08 pm - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
13h 57m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
1:35 pm - 10:34 pmBHD  Belfast City-STL Lambert-St Louis
14h 59m2 stops London Heathrow Chicago O'Hare Intl
$1,517British Airways
Wed, Jan 20 - Fri, Jan 22
British Airways Logo
2:11 pm - 10:05 amSTL  Lambert-St Louis-BHD Belfast City
13h 54m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
1:35 pm - 10:34 pmBHD  Belfast City-STL Lambert-St Louis
14h 59m2 stops London Heathrow Chicago O'Hare Intl
$1,517British Airways
Wed, Jan 20 - Fri, Jan 22
Multiple Airlines Logo
4:05 pm - 3:30 pmSTL  Lambert-St Louis-BHD Belfast City
17h 25m2 stops Toronto Pearson Intl Manchester
Multiple Airlines Logo
6:20 pm - 7:52 pmBHD  Belfast City-STL Lambert-St Louis
31h 32m3 stops Manchester Dublin Chicago O'Hare Intl
$1,554Multiple Airlines
Wed, Dec 9 - Tue, Dec 22
Multiple Airlines Logo
2:54 pm - 8:20 pmSTL  Lambert-St Louis-BHD Belfast City
47h 26m3 stops Dallas/Fort Worth Hong Kong Intl London Heathrow
Multiple Airlines Logo
11:40 am - 12:16 amBHD  Belfast City-STL Lambert-St Louis
42h 36m3 stops London Heathrow Hong Kong Intl Dallas/Fort Worth
$13,772Multiple Airlines
Wed, Dec 9 - Tue, Dec 22
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
$13,776Multiple 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
Feb 17
STL2:21 pmLambert-St Louis
16h 54m
2 stops
BHD1:15 pmBelfast City
Feb 23
BHD11:40 amBelfast City
16h 43m
2 stops
STL10:23 pmLambert-St Louis
$887
British Airways
Dec 9
STL1:43 pmLambert-St Louis
14h 22m
2 stops
BHD10:05 amBelfast City
Dec 22
BHD7:30 pmBelfast City
34h 01m
2 stops
STL11:31 pmLambert-St Louis
$983
British Airways
Mar 3
STL10:30 amLambert-St Louis
17h 35m
2 stops
BHD10:05 amBelfast City
Mar 5
BHD11:50 amBelfast City
16h 40m
2 stops
STL10:30 pmLambert-St Louis
$1,154

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

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Price

Cheapest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 2/17

2:21 pm-1:15 pm

2 stops16h 54m

Belfast City

Tue 2/23

11:40 am-10:23 pm

2 stops16h 43m

$887

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 12/9

1:43 pm-10:05 am

2 stops14h 22m

Belfast City

Tue 12/22

7:30 pm-11:31 pm

2 stops34h 01m

$983

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Tue 12/15

1:43 pm-11:30 am

2 stops15h 47m

Belfast City

Thu 1/14

6:30 am-8:31 pm

2 stops20h 01m

$1,032

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 3/3

10:30 am-10:05 am

2 stops17h 35m

Belfast City

Fri 3/5

11:50 am-10:30 pm

2 stops16h 40m

$1,154

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 3/3

10:30 am-10:05 am

2 stops17h 35m

Belfast City

Fri 3/5

11:50 am-10:30 pm

2 stops16h 40m

$1,155

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 1/20

2:08 pm-10:05 am

2 stops13h 57m

Belfast City

Fri 1/22

1:35 pm-10:34 pm

2 stops14h 59m

$1,517
Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 1/20

2:11 pm-10:05 am

2 stops13h 54m

Belfast City

Fri 1/22

1:35 pm-10:34 pm

2 stops14h 59m

$1,517

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 12/9

4:05 pm-3:30 pm

2 stops17h 25m

Belfast City

Tue 12/22

6:20 pm-7:52 pm

3 stops31h 32m

$1,554

St. LouisBelfast

STL Lambert-St Louis - BHD Belfast City

STLBHD

Lambert-St Louis

Wed 12/9

2:54 pm-8:20 pm

3 stops47h 26m

Belfast City

Tue 12/22

11:40 am-12:16 am

3 stops42h 36m

$13,772

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

$13,776

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from St. Louis to Belfast

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Belfast?

British Airways and Aer Lingus are the most popular carriers operating from Lambert-St Louis to Belfast

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

$365

Fastest flight time

13h 54m

Direct flights

None
The best one-way flight to Belfast from St. Louis in the past 72 hours is $365. The best round-trip flight deal from St. Louis to Belfast found on momondo in the last 72 hours is $887.
The fastest flight from St. Louis to Belfast takes 13h 54m
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 13h 54m, 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.

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