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.

$657 Cheap Flights from St. Louis to Belfast in 2025/26

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Find the cheapest flights from St. Louis to Belfast

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:31 pm - 4:50 pm

STL

BHD

19h 19m2 stops

5:20 pm - 4:45 pm

BHD

STL

29h 25m2 stops

$661KLM

mar., ene. 20 - mar., ene. 27

10:00 pm - 3:30 pm

STL

BHD

11h 30m1 stop

4:15 pm - 7:30 pm

BHD

STL

33h 15m1 stop

$761British Airways

vie., abr. 24 - sáb., may. 2

11:14 am - 3:30 pm

STL

BHD

22h 16m2 stops

7:00 pm - 7:30 pm

BHD

STL

30h 30m1 stop

$781British Airways

vie., abr. 24 - sáb., may. 2

11:14 am - 3:30 pm

STL

BHD

22h 16m2 stops

9:35 am - 11:24 pm

BHD

STL

19h 49m2 stops

$784British Airways

vie., abr. 24 - sáb., may. 2

6:55 pm - 4:50 pm

STL

BHD

15h 55m2 stops

5:20 pm - 8:43 pm

BHD

STL

33h 23m2 stops

$797KLM

lun., ene. 12 - mar., ene. 20

6:44 pm - 6:35 pm

STL

BHD

17h 51m2 stops

6:35 am - 6:16 pm

BHD

STL

17h 41m2 stops

$817British Airways

lun., ene. 12 - mar., ene. 20

12:11 pm - 10:15 am

STL

BHD

16h 04m2 stops

6:30 am - 8:13 pm

BHD

STL

19h 43m2 stops

$994British Airways

mié., feb. 4 - dom., feb. 8

6:00 am - 10:20 am

STL

BHD

22h 20m2 stops

11:05 am - 11:28 pm

BHD

STL

18h 23m2 stops

$1,366British Airways

dom., feb. 8 - jue., feb. 12

KLM flights from St. Louis to Belfast

Our best KLM deals on St. Louis to Belfast flight tickets

KLM

Jan 20

STL3:31 pmLambert-St Louis

19h 19m

2 stops

BHD4:50 pmBelfast City

Jan 27

BHD5:20 pmBelfast City

29h 25m

2 stops

STL4:45 pmLambert-St Louis

$661

Find similar

KLM

Jan 12

STL6:55 pmLambert-St Louis

15h 55m

2 stops

BHD4:50 pmBelfast City

Jan 20

BHD5:20 pmBelfast City

33h 23m

2 stops

STL8:43 pmLambert-St Louis

$797

Find similar

British Airways flights from St. Louis to Belfast

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

British Airways

Apr 24

STL10:00 pmLambert-St Louis

11h 30m

1 stop

BHD3:30 pmBelfast City

May 2

BHD4:15 pmBelfast City

33h 15m

1 stop

STL7:30 pmLambert-St Louis

$761

Find similar

British Airways

Apr 24

STL11:14 amLambert-St Louis

22h 16m

2 stops

BHD3:30 pmBelfast City

May 2

BHD7:00 pmBelfast City

30h 30m

1 stop

STL7:30 pmLambert-St Louis

$781

Find similar

British Airways

Apr 24

STL11:14 amLambert-St Louis

22h 16m

2 stops

BHD3:30 pmBelfast City

May 2

BHD9:35 amBelfast City

19h 49m

2 stops

STL11:24 pmLambert-St Louis

$784

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

mar. 1/20

3:31 pm-4:50 pm

2 stops19h 19m

Belfast City

mar. 1/27

5:20 pm-4:45 pm

2 stops29h 25m

$661

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

vie. 4/24

10:00 pm-3:30 pm

1 stop11h 30m

Belfast City

sáb. 5/2

4:15 pm-7:30 pm

1 stop33h 15m

$761

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

vie. 4/24

11:14 am-3:30 pm

2 stops22h 16m

Belfast City

sáb. 5/2

7:00 pm-7:30 pm

1 stop30h 30m

$781

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

vie. 4/24

11:14 am-3:30 pm

2 stops22h 16m

Belfast City

sáb. 5/2

9:35 am-11:24 pm

2 stops19h 49m

$784

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

lun. 1/12

6:55 pm-4:50 pm

2 stops15h 55m

Belfast City

mar. 1/20

5:20 pm-8:43 pm

2 stops33h 23m

$797

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

lun. 1/12

6:44 pm-6:35 pm

2 stops17h 51m

Belfast City

mar. 1/20

6:35 am-6:16 pm

2 stops17h 41m

$817

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

mié. 2/4

12:11 pm-10:15 am

2 stops16h 04m

Belfast City

dom. 2/8

6:30 am-8:13 pm

2 stops19h 43m

$994

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

dom. 2/8

6:00 am-10:20 am

2 stops22h 20m

Belfast City

jue. 2/12

11:05 am-11:28 pm

2 stops18h 23m

$1,366

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	11h 30m
Direct flights	None

The fastest flight from St. Louis to Belfast takes 11h 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

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 11h 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.

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.