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

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:44 pm - 2:15 pmSTL-BHD

13h 31m2 stops

6:35 am - 6:16 pmBHD-STL

17h 41m2 stops

$576British Airways

Find Deal

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

12:06 pm - 11:10 amSTL-BHD

17h 04m2 stops

6:35 am - 10:44 pmBHD-STL

22h 09m2 stops

$623British Airways

Find Deal

sáb., ene. 24 - sáb., ene. 31

11:23 am - 4:50 pmSTL-BHD

23h 27m2 stops

6:30 am - 8:43 pmBHD-STL

43h 13m2 stops

$652Delta

Find Deal

mié., mar. 4 - lun., mar. 16

11:23 am - 9:00 pmSTL-BHD

27h 37m2 stops

6:30 am - 5:05 pmBHD-STL

15h 35m2 stops

$702Delta

Find Deal

jue., mar. 5 - mar., mar. 17

6:00 am - 10:30 amSTL-BHD

22h 30m2 stops

6:45 am - 5:59 pmBHD-STL

16h 14m2 stops

$709British Airways

Find Deal

vie., mar. 6 - vie., mar. 13

5:04 pm - 4:50 pmSTL-BHD

17h 46m2 stops

5:20 pm - 9:06 amBHD-STL

45h 46m2 stops

$711KLM

Find Deal

mié., feb. 11 - dom., feb. 15

6:33 pm - 1:30 pmSTL-BHD

36h 57m2 stops

3:05 pm - 11:48 pmBHD-STL

37h 43m2 stops

$719British Airways

Find Deal

sáb., mar. 7 - sáb., mar. 14

10:12 am - 4:50 pmSTL-BHD

24h 38m2 stops

6:30 am - 8:41 pmBHD-STL

19h 11m2 stops

$730Delta

Find Deal

mié., mar. 4 - vie., mar. 13

6:59 pm - 9:00 pmSTL-BHD

21h 01m2 stops

6:30 am - 9:10 pmBHD-STL

19h 40m2 stops

$747Delta

Find Deal

lun., mar. 9 - jue., mar. 12

1:10 pm - 9:00 pmSTL-BHD

25h 50m2 stops

6:30 am - 8:43 pmBHD-STL

43h 13m2 stops

$752Delta

Find Deal

jue., mar. 5 - dom., mar. 15

Delta flights from St. Louis to Belfast

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

Delta

Mar 4

STL11:23 amLambert-St Louis

23h 27m

2 stops

BHD4:50 pmBelfast City

Mar 16

BHD6:30 amBelfast City

43h 13m

2 stops

STL8:43 pmLambert-St Louis

$652

Find similar

Delta

Mar 5

STL11:23 amLambert-St Louis

27h 37m

2 stops

BHD9:00 pmBelfast City

Mar 16

BHD6:30 amBelfast City

43h 13m

2 stops

STL8:43 pmLambert-St Louis

$702

Find similar

Delta

Mar 4

STL10:12 amLambert-St Louis

24h 38m

2 stops

BHD4:50 pmBelfast City

Mar 13

BHD6:30 amBelfast City

19h 11m

2 stops

STL8:41 pmLambert-St Louis

$730

Find similar

British Airways flights from St. Louis to Belfast

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

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

$576

Find similar

British Airways

Jan 24

STL12:06 pmLambert-St Louis

17h 04m

2 stops

BHD11:10 amBelfast City

Jan 31

BHD6:35 amBelfast City

22h 09m

2 stops

STL10:44 pmLambert-St Louis

$623

Find similar

British Airways

Mar 6

STL6:00 amLambert-St Louis

22h 30m

2 stops

BHD10:30 amBelfast City

Mar 13

BHD6:45 amBelfast City

16h 14m

2 stops

STL5:59 pmLambert-St Louis

$709

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

lun. 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

mar. 1/20

6:35 am-6:16 pm

2 stops17h 41m

$576

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

sáb. 1/24

12:06 pm-11:10 am

2 stops17h 04m

Belfast City

sáb. 1/31

6:35 am-10:44 pm

2 stops22h 09m

$623

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

mié. 3/4

11:23 am-4:50 pm

2 stops23h 27m

Belfast City

lun. 3/16

6:30 am-8:43 pm

2 stops43h 13m

$652

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

jue. 3/5

11:23 am-9:00 pm

2 stops27h 37m

Belfast City

mar. 3/17

6:30 am-5:05 pm

2 stops15h 35m

$702

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

vie. 3/6

6:00 am-10:30 am

2 stops22h 30m

Belfast City

vie. 3/13

6:45 am-5:59 pm

2 stops16h 14m

$709

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

mié. 2/11

5:04 pm-4:50 pm

2 stops17h 46m

Belfast City

dom. 2/15

5:20 pm-9:06 am

2 stops45h 46m

$711

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

sáb. 3/7

6:33 pm-1:30 pm

2 stops36h 57m

Belfast City

sáb. 3/14

3:05 pm-11:48 pm

2 stops37h 43m

$719

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

mié. 3/4

10:12 am-4:50 pm

2 stops24h 38m

Belfast City

vie. 3/13

6:30 am-8:41 pm

2 stops19h 11m

$730

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

lun. 3/9

6:59 pm-9:00 pm

2 stops21h 01m

Belfast City

jue. 3/12

6:30 am-9:10 pm

2 stops19h 40m

$747

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

jue. 3/5

1:10 pm-9:00 pm

2 stops25h 50m

Belfast City

dom. 3/15

6:30 am-8:43 pm

2 stops43h 13m

$752

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	14h 09m
Direct flights	None

The fastest flight from St. Louis to Belfast takes 14h 09m

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 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.

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.