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Belfast

$1,060+ Cheap flights from St. Louis (STL) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
Aug 25 — Sep 11
Tue 8/25
Tue 9/1
1 adult, Economy
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Cheap flight deals from St. Louis to Belfast

Cheapest flights from St. Louis to Belfast
Explore the most affordable flight options available from St. Louis to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 26, 2026.

This FlightHub deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:35 pm
STL
-
BHD
1 stop14h 00m
British Airways
Tue 8/188:25 pm
BHD
-
STL
2 stops33h 49m
British Airways
Deal found 7/22$1,060
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/103:39 pm
STL
-
BHD
2 stops19h 16m
Delta
Tue 8/185:30 pm
BHD
-
STL
2 stops27h 40m
Delta
Deal found 7/22$1,090
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:13 am
STL
-
BHD
2 stops16h 07m
Delta
Mon 8/175:30 pm
BHD
-
STL
2 stops27h 03m
Delta
Deal found 7/22$1,110
This Mytrip deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:10 pm
STL
-
BFS
2 stops23h 15m
Multiple Airlines
Sun 9/138:25 am
BFS
-
STL
2 stops35h 00m
Multiple Airlines
Deal found 7/24$1,135
This KLM deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:00 am
STL
-
BHD
2 stops16h 20m
KLM
Tue 8/185:30 pm
BHD
-
STL
2 stops27h 03m
KLM
Deal found 7/22$1,140
This British Airways deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:32 am
STL
-
BHD
2 stops23h 13m
British Airways
Fri 12/46:45 am
BHD
-
STL
2 stops15h 58m
British Airways
Deal found 7/24$1,141
This British Airways deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2912:43 pm
STL
-
BHD
2 stops36h 57m
British Airways
Wed 12/23:40 pm
BHD
-
STL
2 stops34h 41m
British Airways
Deal found 7/21$1,153
This Orbitz deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/129:35 pm
STL
-
BHD
1 stop12h 05m
British Airways
Mon 8/177:35 pm
BHD
-
STL
1 stop29h 55m
British Airways
Deal found 7/22$1,158
This KLM deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:00 am
STL
-
BHD
2 stops16h 20m
KLM
Mon 8/175:30 pm
BHD
-
STL
2 stops28h 47m
KLM
Deal found 7/22$1,160
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:52 pm
STL
-
BHD
2 stops14h 28m
Delta
Sun 8/165:30 pm
BHD
-
STL
2 stops30h 08m
Delta
Deal found 7/22$1,170
This Mytrip deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:55 am
STL
-
BFS
2 stops20h 20m
Multiple Airlines
Mon 9/149:55 pm
BFS
-
STL
2 stops21h 30m
Multiple Airlines
Deal found 7/23$1,209
This Mytrip deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:10 pm
STL
-
BFS
3 stops26h 15m
Multiple Airlines
Mon 8/179:50 pm
BFS
-
STL
2 stops28h 34m
Multiple Airlines
Deal found 7/22$1,237

Find flight deals from St. Louis to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 26, 2026.

Round-trip from

$1,060
(FlightHub)
From Lambert-St Louis to Belfast
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Belfast that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 26, 2026.
Use the filters below to find and compare flights from St. Louis to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 8/10

3:39 pm-4:55 pm

2 stops19h 16m

Belfast City

Tue 8/18

5:30 pm-3:10 pm

2 stops27h 40m

$1,090

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 8/12

11:13 am-9:20 am

2 stops16h 07m

Belfast City

Mon 8/17

5:30 pm-4:17 pm

2 stops28h 47m

$1,110

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 8/10

12:52 pm-9:20 am

2 stops14h 28m

Belfast City

Mon 8/17

5:30 pm-2:33 pm

2 stops27h 03m

$1,110

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 9/6

12:10 pm-5:25 pm

2 stops23h 15m

Belfast Intl

Sun 9/13

8:25 am-1:25 pm

2 stops35h 00m

$1,135

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 12/1

11:32 am-4:45 pm

2 stops23h 13m

Belfast City

Fri 12/4

6:45 am-4:43 pm

2 stops15h 58m

$1,142

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 11/29

12:43 pm-7:40 am

2 stops36h 57m

Belfast City

Wed 12/2

3:40 pm-8:21 pm

2 stops34h 41m

$1,153
Quickest round-trip

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 8/11

9:35 pm-5:35 pm

1 stop14h 00m

Belfast City

Mon 8/17

9:40 am-7:27 pm

2 stops15h 47m

$1,171

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 9/7

8:55 am-11:15 am

2 stops20h 20m

Belfast Intl

Mon 9/14

9:55 pm-1:25 pm

2 stops21h 30m

$1,209

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 8/14

10:33 am-9:20 am

2 stops16h 47m

Belfast City

Sun 8/16

5:30 pm-5:38 pm

2 stops30h 08m

$1,220

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Wed 8/12

12:10 pm-8:25 pm

3 stops26h 15m

Belfast Intl

Mon 8/17

9:50 pm-8:24 pm

2 stops28h 34m

$1,237

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 13 resultsSorted by cheapest first
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Best time to book a flight from St. Louis to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Belfast

No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Belfast?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Belfast from St. Louis. Booking flights from Lambert-St Louis (STL) to Belfast should be relatively easy as there are 0 daily outbound flights to Belfast from 0 different airlines.

  • How long is the flight from St. Louis to Belfast?

    Departing from St. Louis to Belfast will take you 16h 07m. The distance between St. Louis and Belfast is about 3893 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from St. Louis to Belfast that include hotel bookings?

    Yes. In addition to deals on St. Louis to Belfast flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Belfast.

  • Can I find deals for business class flights from St. Louis to Belfast?

    Yes. Cheapflights offers flight deals from St. Louis to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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