Find flights
When to book
FAQs

Cheap flights from St. Louis to Belfast from £282

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
24 May — 31 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Belfast

Enter your travel dates to find the best prices.

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 24 April 2026.

Sun 23/821:40
STL
-
BHD
1 stop10h 55m
British Airways
Wed 26/811:35
BHD
-
STL
1 stop13h 55m
British Airways
Deal found 21/4£674
Fri 16/1021:35
STL
-
BHD
1 stop14h 35m
British Airways
Tue 20/1009:40
BHD
-
STL
1 stop15h 50m
British Airways
Deal found 23/4£695
Tue 4/818:12
STL
-
BHD
2 stops17h 23m
American Airlines
Thu 13/809:35
BHD
-
STL
2 stops19h 48m
American Airlines
Deal found 19/4£696
Fri 16/1018:51
STL
-
BHD
2 stops17h 19m
Multiple Airlines
Tue 20/1013:45
BHD
-
STL
1 stop11h 45m
Multiple Airlines
Deal found 23/4£717
Tue 4/821:35
STL
-
BHD
1 stop14h 00m
British Airways
Thu 13/809:35
BHD
-
STL
2 stops18h 50m
British Airways
Deal found 19/4£718
Fri 16/1016:51
STL
-
BHD
2 stops19h 19m
American Airlines
Tue 20/1009:40
BHD
-
STL
2 stops19h 45m
American Airlines
Deal found 23/4£720
Sat 1/815:55
STL
-
BHD
2 stops34h 45m
British Airways
Tue 11/820:25
BHD
-
STL
2 stops33h 26m
British Airways
Deal found 19/4£787
Tue 1/1214:17
STL
-
BHD
2 stops20h 28m
British Airways
Fri 4/1206:45
BHD
-
STL
2 stops23h 13m
British Airways
Deal found 23/4£833
Sat 6/608:40
STL
-
BFS
3 stops28h 15m
Multiple Airlines
Sat 13/606:55
BFS
-
STL
3 stops35h 11m
Multiple Airlines
Deal found 22/4£878
Fri 5/614:15
STL
-
BFS
2 stops25h 35m
Multiple Airlines
Fri 12/618:40
BFS
-
STL
3 stops47h 26m
Multiple Airlines
Deal found 21/4£907

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 24 April 2026.

Round-trip from

£672

One-way from

£282
American Airlines
  • American Airlines
  • 23/8-26/8
  • 2 total stops
  • 33h 00m total
  • St. Louis to Belfast
Search Deals
British Airways
  • British Airways
  • 16/10
  • 1 total stop
  • 14h 35m total
  • St. Louis to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 24 April 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 return flight
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 16/10

18:51-18:10

2 stops17h 19m

Belfast City

Tue 20/10

13:45-19:30

1 stop11h 45m

£717

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 16/10

16:51-18:10

2 stops19h 19m

Belfast City

Tue 20/10

09:40-23:25

2 stops19h 45m

£720

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 1/8

15:55-08:40

2 stops34h 45m

Belfast City

Tue 11/8

20:25-23:51

2 stops33h 26m

£787

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 23/8

13:37-14:35

2 stops18h 58m

Belfast City

Wed 26/8

11:35-19:30

1 stop13h 55m

£826

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 4/8

21:35-17:35

1 stop14h 00m

Belfast City

Thu 13/8

20:35-19:30

1 stop28h 55m

£856

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 6/6

08:40-18:55

3 stops28h 15m

Belfast Intl

Sat 13/6

06:55-12:06

3 stops35h 11m

£878

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 5/6

14:15-21:50

2 stops25h 35m

Belfast Intl

Fri 12/6

18:40-12:06

3 stops47h 26m

£907
Cheapest one-way
Fastest single journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 16/10

21:35-18:10

1 stop14h 35m

£282

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 16/10

16:32-18:10

2 stops19h 38m

£289

Flights are sorted by cheapest return flights first.

Deals found on 23/4

Sorted by cheapest first

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 return 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?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Belfast. On average, Lambert-St Louis has 0 outbound flights to Belfast per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

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

    For as low as £720, American Airlines can have you in Belfast from St. Louis in 19h 19m. Airlines will cover a distance of 3893 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 holiday 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Belfast City flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Belfast?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Belfast from St. Louis today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Belfast?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Belfast.

Can Cheapflights find flights from St. Louis to Belfast with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from St. Louis to Belfast become cheaper?

Of course! You can now track prices for flights from St. Louis to Belfast and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.