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Cheap flights from St. Louis to Belfast from £467

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
17 Jan — 24 Jan1
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 18 December 2025.

Wed 31/1214:06STL - BHD
2 stops18h 09mAmerican Airlines
Wed 7/106:35BHD - STL
2 stops17h 59mAmerican Airlines
Deal found 16/12£818
Thu 18/1213:05STL - BHD
2 stops25h 25mMultiple Airlines
Thu 8/107:25BHD - STL
2 stops22h 34mMultiple Airlines
Deal found 15/12£1,395
Thu 18/1213:54STL - BHD
2 stops18h 06mAmerican Airlines
Thu 8/106:35BHD - STL
2 stops20h 40mAmerican Airlines
Deal found 15/12£1,465

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 18 December 2025.

Round-trip from

£467
British Airways
  • British Airways
  • 12/1-20/1
  • 4 total stops
  • 35h 32m total
  • St. Louis to Belfast
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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 18 December 2025.
Use the filters below to find and compare flights from St. Louis to Belfast that are best for you.

Fly from

St. Louis

Fly to

Belfast

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-18:35

2 stops17h 51m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£467

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 11/2

11:05-16:35

2 stops23h 30m

Belfast City

Sun 15/2

09:10-22:54

2 stops19h 44m

£631

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 6/2

17:04-17:15

2 stops18h 11m

Belfast City

Tue 10/2

19:25-21:15

2 stops31h 50m

£631

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 31/12

14:06-14:15

2 stops18h 09m

Belfast City

Wed 7/1

06:35-18:34

2 stops17h 59m

£818

Flights are sorted by cheapest return flights first.

Deals found on 16/12

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 £467, British Airways can have you in Belfast from St. Louis in 17h 51m. Airlines will cover a distance of 3893 mi.

  • 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

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Alternative routes for St. Louis to Belfast

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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.

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