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$749+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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Cheap 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 April 24, 2025.

Round-trip from

$749
(Expedia)
From Lambert-St Louis to Belfast
Search Deals

Find 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 April 24, 2025.

This Orbitz deal was found by Cheapflights users on 4/24. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:23 amSTL - BHD
2 stops21h 12mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops30h 54mBritish Airways
Deal found 4/24$1,099
This StudentUniverse deal was found by Cheapflights users on 4/23. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:23 amSTL - BHD
3 stops23h 27mAer Lingus
Mon 7/217:00 amBHD - STL
3 stops30h 56mAer Lingus
Deal found 4/23$1,604
This StudentUniverse deal was found by Cheapflights users on 4/23. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/154:52 pmSTL - BHD
3 stops21h 03mMultiple Airlines
Mon 7/213:20 pmBHD - STL
3 stops35h 04mMultiple Airlines
Deal found 4/23$1,679

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 April 24, 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

Tue 7/15

7:23 am-10:35 am

2 stops21h 12m

Belfast City

Mon 7/21

7:30 pm-8:24 pm

2 stops30h 54m

$1,099

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

7:23 am-12:50 pm

3 stops23h 27m

Belfast City

Mon 7/21

7:00 am-7:56 am

3 stops30h 56m

$1,604

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

4:52 pm-7:55 pm

3 stops21h 03m

Belfast City

Mon 7/21

3:20 pm-8:24 pm

3 stops35h 04m

$1,679

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

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

What is the cheapest time of day to fly from STL to BFS?

Find hourly flight availability from St. Louis to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

When flying from St. Louis to Belfast, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 48% versus a flight in the morning.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated April 24, 2025.
Aer Lingus
7.0
Good
1,068 reviews

Boarding

7.2

Overall

7.0

Crew

7.9

Entertainment

6.7

Comfort

7.0

Food

6.4

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Aer Lingus
7.0
Good
1,068 reviews
Aer Lingus
7.0
Good
1,068 reviews

Boarding

7.2

Overall

7.0

Crew

7.9

Entertainment

6.7

Comfort

7.0

Food

6.4

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
British Airways
6.6
Okay
6,799 reviews
Aer Lingus
7.0
Good
1,068 reviews

Boarding

7.2

Overall

7.0

Crew

7.9

Entertainment

6.7

Comfort

7.0

Food

6.4

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.

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 1 airline.

  • What are the cheapest airlines flying from St. Louis to Belfast round-trip?

    Our cheapest airline available from St. Louis to Belfast is British Airways. Our recent data shows that you can find tickets from as low as $749 on this airline. An additional option worth looking into is Aer Lingus, starting at $1,265.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Belfast?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Belfast (average of $657). Flying from St. Louis to Belfast in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Belfast

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

Top airline flying from St. Louis to Belfast

Discover the top airline that operate flights from St. Louis to Belfast. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$658Average$778FlexibilityNo cancel feeOn-time71%

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