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.

$576 Cheap Flights from St. Louis to Belfast in 2025/26

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Find the cheapest flights from St. Louis to Belfast

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Cheap round-trip flights

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5:04 pm - 4:05 pmSTL-BHD

17h 01m2 stops

6:35 am - 6:16 pmBHD-STL

17h 41m2 stops

$576British Airways

Find Deal

Mon, Jan 12 - Tue, Jan 20

6:44 pm - 6:35 pmSTL-BHD

17h 51m2 stops

6:35 am - 6:16 pmBHD-STL

17h 41m2 stops

$577British Airways

Find Deal

Mon, Jan 12 - Tue, Jan 20

6:44 pm - 2:15 pmSTL-BHD

13h 31m2 stops

6:35 am - 6:16 pmBHD-STL

17h 41m2 stops

$579British Airways

Find Deal

Mon, Jan 12 - Tue, Jan 20

6:43 pm - 4:45 pmSTL-BHD

16h 02m2 stops

6:35 am - 6:13 pmBHD-STL

17h 38m2 stops

$621British Airways

Find Deal

Sat, Jan 24 - Sat, Jan 31

5:04 pm - 4:50 pmSTL-BHD

17h 46m2 stops

5:20 pm - 9:06 amBHD-STL

45h 46m2 stops

$710KLM

Find Deal

Wed, Feb 11 - Sun, Feb 15

1:00 pm - 4:50 pmSTL-BHD

21h 50m2 stops

5:20 pm - 11:23 pmBHD-STL

36h 03m2 stops

$756Virgin Atlantic

Find Deal

Wed, Feb 11 - Sun, Feb 15

5:04 pm - 4:50 pmSTL-BHD

17h 46m2 stops

5:20 pm - 8:43 pmBHD-STL

33h 23m2 stops

$757Virgin Atlantic

Find Deal

Wed, Feb 11 - Sun, Feb 15

6:35 pm - 10:20 amSTL-BHD

33h 45m2 stops

6:35 am - 8:51 pmBHD-STL

20h 16m2 stops

$2,376British Airways

Find Deal

Sat, Dec 27 - Sat, Jan 3

4:05 pm - 7:55 pmSTL-BFS

21h 50m2 stops

12:45 pm - 1:55 pmBFS-STL

31h 10m3 stops

$2,404Multiple Airlines

Find Deal

Sat, Dec 27 - Sat, Jan 3

4:53 pm - 10:15 pmSTL-BFS

23h 22m3 stops

12:45 pm - 1:55 pmBFS-STL

31h 10m3 stops

$2,434Multiple Airlines

Find Deal

Sat, Dec 27 - Sat, Jan 3

British Airways flights from St. Louis to Belfast

Our best British Airways deals on St. Louis to Belfast flight tickets

British Airways

Jan 12

STL5:04 pmLambert-St Louis

17h 01m

2 stops

BHD4:05 pmBelfast City

Jan 20

BHD6:35 amBelfast City

17h 41m

2 stops

STL6:16 pmLambert-St Louis

$576

Find similar

British Airways

Jan 12

STL6:44 pmLambert-St Louis

17h 51m

2 stops

BHD6:35 pmBelfast City

Jan 20

BHD6:35 amBelfast City

17h 41m

2 stops

STL6:16 pmLambert-St Louis

$577

Find similar

British Airways

Jan 12

STL6:44 pmLambert-St Louis

13h 31m

2 stops

BHD2:15 pmBelfast City

Jan 20

BHD6:35 amBelfast City

17h 41m

2 stops

STL6:16 pmLambert-St Louis

$579

Find similar

Virgin Atlantic flights from St. Louis to Belfast

Our best Virgin Atlantic deals on St. Louis to Belfast flight tickets

Virgin Atlantic

Feb 11

STL1:00 pmLambert-St Louis

21h 50m

2 stops

BHD4:50 pmBelfast City

Feb 15

BHD5:20 pmBelfast City

36h 03m

2 stops

STL11:23 pmLambert-St Louis

$756

Find similar

Virgin Atlantic

Feb 11

STL5:04 pmLambert-St Louis

17h 46m

2 stops

BHD4:50 pmBelfast City

Feb 15

BHD5:20 pmBelfast City

33h 23m

2 stops

STL8:43 pmLambert-St Louis

$757

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

5:04 pm-4:05 pm

2 stops17h 01m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$576

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:44 pm-6:35 pm

2 stops17h 51m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$577

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$579

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 1/24

6:43 pm-4:45 pm

2 stops16h 02m

Belfast City

Sat 1/31

6:35 am-6:13 pm

2 stops17h 38m

$621

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/11

5:04 pm-4:50 pm

2 stops17h 46m

Belfast City

Sun 2/15

5:20 pm-9:06 am

2 stops45h 46m

$710

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/11

1:00 pm-4:50 pm

2 stops21h 50m

Belfast City

Sun 2/15

5:20 pm-11:23 pm

2 stops36h 03m

$756

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 2/11

5:04 pm-4:50 pm

2 stops17h 46m

Belfast City

Sun 2/15

5:20 pm-8:43 pm

2 stops33h 23m

$757

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 12/27

6:35 pm-10:20 am

2 stops33h 45m

Belfast City

Sat 1/3

6:35 am-8:51 pm

2 stops20h 16m

$2,376

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 12/27

4:05 pm-7:55 pm

2 stops21h 50m

Belfast Intl

Sat 1/3

12:45 pm-1:55 pm

3 stops31h 10m

$2,404

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 12/27

4:53 pm-10:15 pm

3 stops23h 22m

Belfast Intl

Sat 1/3

12:45 pm-1:55 pm

3 stops31h 10m

$2,434

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 day to depart on your flight to Belfast?

The cheapest day to depart from St. Louis to Belfast is on a Tuesday when prices can be found for as low as $674. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Belfast for around $870.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest St. Louis to Belfast flights are usually those with departure times in the afternoon. Our users have found flights to Belfast in the afternoon for as low as $785. Try not to purchase tickets at noon because they tend to be around $1,429. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Fastest flight time	13h 31m
Direct flights	None

The fastest flight from St. Louis to Belfast takes 13h 31m

There are no direct flights from St. Louis to Belfast. There are no popular flight routes from St. Louis to Belfast.

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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 31m, 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.

Best airlines flying from St. Louis to Belfast

Compare and see reviews for airlines that fly from St. Louis to Belfast with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $674	Free Cancellation	Rating 7.2 11,042 reviews		Search American Airlines flights

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.