Find flights
When to book
FAQs

Cheap flights from St. Louis to Belfast from £796

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
24 Aug — 31 Aug1
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 25 July 2026.

Tue 11/821:35
STL
-
BHD
1 stop14h 00m
British Airways
Tue 18/820:25
BHD
-
STL
2 stops33h 49m
British Airways
Deal found 22/7£796
Mon 10/815:39
STL
-
BHD
2 stops19h 16m
Delta
Tue 18/817:30
BHD
-
STL
2 stops27h 40m
Delta
Deal found 22/7£818
Wed 12/811:13
STL
-
BHD
2 stops16h 07m
Delta
Mon 17/817:30
BHD
-
STL
2 stops27h 03m
Delta
Deal found 22/7£833
Sun 6/912:10
STL
-
BFS
2 stops23h 15m
Multiple Airlines
Sun 13/908:25
BFS
-
STL
2 stops35h 00m
Multiple Airlines
Deal found 24/7£852
Thu 13/811:00
STL
-
BHD
2 stops16h 20m
KLM
Tue 18/817:30
BHD
-
STL
2 stops27h 03m
KLM
Deal found 22/7£856
Tue 1/1211:32
STL
-
BHD
2 stops23h 13m
British Airways
Fri 4/1206:45
BHD
-
STL
2 stops15h 58m
British Airways
Deal found 24/7£856
Sun 29/1112:43
STL
-
BHD
2 stops36h 57m
British Airways
Wed 2/1215:40
BHD
-
STL
2 stops34h 41m
British Airways
Deal found 21/7£865
Wed 12/821:35
STL
-
BHD
1 stop12h 05m
British Airways
Mon 17/819:35
BHD
-
STL
1 stop29h 55m
British Airways
Deal found 22/7£869
Thu 13/811:00
STL
-
BHD
2 stops16h 20m
KLM
Mon 17/817:30
BHD
-
STL
2 stops28h 47m
KLM
Deal found 22/7£871
Mon 10/812:52
STL
-
BHD
2 stops14h 28m
Delta
Sun 16/817:30
BHD
-
STL
2 stops30h 08m
Delta
Deal found 22/7£878
Mon 7/908:55
STL
-
BFS
2 stops20h 20m
Multiple Airlines
Mon 14/921:55
BFS
-
STL
2 stops21h 30m
Multiple Airlines
Deal found 23/7£907
Wed 12/812:10
STL
-
BFS
3 stops26h 15m
Multiple Airlines
Mon 17/821:50
BFS
-
STL
2 stops28h 34m
Multiple Airlines
Deal found 22/7£928

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 25 July 2026.

Round-trip from

£796
British Airways
  • British Airways
  • 12/8-18/8
  • 3 total stops
  • 48h 59m 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 25 July 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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 10/8

15:39-16:55

2 stops19h 16m

Belfast City

Tue 18/8

17:30-15:10

2 stops27h 40m

£818

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 12/8

11:13-09:20

2 stops16h 07m

Belfast City

Mon 17/8

17:30-16:17

2 stops28h 47m

£833

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 10/8

12:52-09:20

2 stops14h 28m

Belfast City

Mon 17/8

17:30-14:33

2 stops27h 03m

£833

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sun 6/9

12:10-17:25

2 stops23h 15m

Belfast Intl

Sun 13/9

08:25-13:25

2 stops35h 00m

£852

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 1/12

17:31-18:40

2 stops19h 09m

Belfast City

Fri 4/12

06:45-23:58

2 stops23h 13m

£857

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 29/11

12:43-07:40

2 stops36h 57m

Belfast City

Wed 2/12

15:40-20:21

2 stops34h 41m

£865
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 11/8

21:35-17:35

1 stop14h 00m

Belfast City

Mon 17/8

09:40-19:27

2 stops15h 47m

£879

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 7/9

08:55-11:15

2 stops20h 20m

Belfast Intl

Mon 14/9

21:55-13:25

2 stops21h 30m

£907

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 14/8

10:33-09:20

2 stops16h 47m

Belfast City

Sun 16/8

17:30-17:38

2 stops30h 08m

£916

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Wed 12/8

12:10-20:25

3 stops26h 15m

Belfast Intl

Mon 17/8

21:50-20:24

2 stops28h 34m

£928

Flights are sorted by cheapest return flights first.

Deals found on 22/7

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 £833, Delta can have you in Belfast from St. Louis in 16h 07m. 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.