HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast

$740+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Belfast with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 21, 2025.

Round-trip from

$741
(Delta)
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 January 21, 2025.

This Delta deal was found by Cheapflights users on 1/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2810:45 amSTL - BHD
2 stops24h 10mDelta
Wed 5/146:30 amBHD - STL
2 stops20h 03mDelta
Deal found 1/21$740
This American Airlines deal was found by Cheapflights users on 1/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/11:48 pmSTL - BHD
2 stops17h 27mAmerican Airlines
Tue 5/136:35 amBHD - STL
2 stops19h 10mAmerican Airlines
Deal found 1/21$742
This Air France deal was found by Cheapflights users on 1/21. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:30 pmSTL - BHD
2 stops17h 25mMultiple Airlines
Wed 5/146:30 amBHD - STL
2 stops20h 18mMultiple Airlines
Deal found 1/21$1,185
This Gurufare deal was found by Cheapflights users on 1/21. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/146:15 pmSTL - BHD
2 stops17h 15mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops26h 28mBritish Airways
Deal found 1/21$1,204
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/73:45 pmSTL - BFS
2 stops21h 10mMultiple Airlines
Fri 3/148:30 pmBFS - STL
3 stops47h 25mMultiple Airlines
Deal found 1/21$1,477

Find flights from St. Louis to Belfast within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 4/28

10:45 am-4:55 pm

2 stops24h 10m

Belfast City

Thu 5/15

6:30 am-9:33 pm

2 stops21h 03m

$741

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 5/1

10:15 am-1:15 pm

2 stops21h 00m

Belfast City

Tue 5/13

6:35 am-7:45 pm

2 stops19h 10m

$742

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 5/2

5:30 pm-4:55 pm

2 stops17h 25m

Belfast City

Tue 5/13

6:30 am-4:50 pm

2 stops16h 20m

$1,186

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 3/7

3:45 pm-6:55 pm

2 stops21h 10m

Belfast Intl

Fri 3/14

8:30 pm-2:55 pm

3 stops47h 25m

$1,477

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 6/27

5:22 pm-1:40 pm

2 stops38h 18m

$776

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 6/27

1:00 pm-2:30 pm

3 stops19h 30m

$1,089

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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.

Travel insights for flights from St. Louis to Belfast

Get recent, data-driven insights about flights from St. Louis to Belfast including ideal travel times, pricing trends, and more.

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 January 21, 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 January 21, 2025.
Delta
8.0
Very good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

British Airways
6.6
Okay
6,834 reviews
Delta
8.0
Very good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 2 different airlines.

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

    Our cheapest airline available from St. Louis to Belfast is Delta. Our recent data shows that you can find tickets from as low as $741 on this airline. An additional option worth looking into is British Airways, starting at $742.

  • 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

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.
St. Louis to Belfast Intl flights
St. Louis to Belfast City flights
Kansas City to Belfast City flights

Top 2 airlines flying from St. Louis to Belfast

Discover the top 2 airlines 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$658Average$771FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$672Average$1,074FlexibilityNo cancel feeOn-time70%
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.