$1,096 Find Cheap Flights from St. Louis to Belfast

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Belfast departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Belfast, as well as popular online travel agencies
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Flights Deals

Cheap Flights from St. Louis to Belfast

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Belfast that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from St. Louis to Belfast

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Belfast.
Discover the best prices for you by selecting your travel dates on KAYAK.
British Airways Logo
1:16 pm - 1:00 pmSTL-BHD
17h 44m2 stops
British Airways Logo
7:30 pm - 8:24 pmBHD-STL
30h 54m2 stops
$1,096British Airways
Find Deal
Tue, Jul 15 - Mon, Jul 21
British Airways Logo
4:52 pm - 3:20 pmSTL-BHD
16h 28m2 stops
British Airways Logo
7:30 pm - 8:24 pmBHD-STL
30h 54m2 stops
$1,097British Airways
Find Deal
Tue, Jul 15 - Mon, Jul 21
British Airways Logo
7:23 am - 12:55 pmSTL-BHD
23h 32m2 stops
British Airways Logo
7:30 pm - 8:24 pmBHD-STL
30h 54m2 stops
$1,098British Airways
Find Deal
Mon, Jul 14 - Mon, Jul 21
British Airways Logo
7:23 am - 12:55 pmSTL-BHD
23h 32m2 stops
British Airways Logo
7:30 pm - 8:23 pmBHD-STL
30h 53m2 stops
$1,148British Airways
Find Deal
Mon, Jul 14 - Mon, Jul 21
Aer Lingus Logo
8:26 am - 12:50 pmSTL-BHD
22h 24m3 stops
Aer Lingus Logo
7:00 am - 7:56 amBHD-STL
30h 56m3 stops
$1,554Aer Lingus
Find Deal
Tue, Jul 15 - Mon, Jul 21
Aer Lingus Logo
8:26 am - 12:50 pmSTL-BHD
22h 24m3 stops
Aer Lingus Logo
7:00 am - 7:56 amBHD-STL
30h 56m3 stops
$1,555Aer Lingus
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
9:15 am - 9:10 pmSTL-BHD
29h 55m2 stops
 Logo
7:00 am - 10:45 pmBHD-STL
21h 45m3 stops
$1,584
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
9:15 am - 5:40 pmSTL-BHD
26h 25m2 stops
 Logo
7:00 am - 10:45 pmBHD-STL
21h 45m3 stops
$1,585
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
4:52 pm - 7:55 pmSTL-BHD
21h 03m3 stops
 Logo
3:20 pm - 8:24 pmBHD-STL
35h 04m3 stops
$1,677
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
9:15 am - 5:40 pmSTL-BHD
26h 25m2 stops
 Logo
7:00 am - 9:35 pmBHD-STL
20h 35m3 stops
$2,061
Find Deal
Tue, Jul 15 - Mon, Jul 21
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KAYAK's insights & trends for St. Louis to Belfast flights

Get data-powered insights and trends into flights from St. Louis to Belfast to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Belfast?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Belfast were found on British Airways ($1,096) and Aer Lingus ($1,554).

Good to know

Cheapest flight$1,096
Flight from St. Louis to Belfast City Airport

When to book flights from St. Louis to Belfast

Are your dates flexible? Find out the best times to travel from St. Louis to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Belfast

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

    In the last 3 days, the lowest price for a flight from St. Louis to Belfast was $1,096 for a round-trip ticket.

  • Do I need a passport to fly between St. Louis and Belfast?

    A passport is required to fly from St. Louis to Belfast.

  • Which airports will I be using when flying from St. Louis to Belfast?

    St. Louis is served by only 1 airport and there are 2 airports in Belfast. You will leave St. Louis from Lambert-St Louis and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from St. Louis to Belfast?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Belfast?

    oneworld is the only airline alliance operating flights between St. Louis and Belfast.

  • How does KAYAK find such low prices on flights from St. Louis to Belfast?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Belfast.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Belfast?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Belfast?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Belfast?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from St. Louis to Belfast

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Belfast? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
7.5Boarding
6.9Entertainment
7.2Comfort
6.5Food
8.0Crew
Airline reviews

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

8.0 ExcellentAnonymous, Apr 2025FCO - LHR
Read more American Airlines reviews

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

Not very good , the stewardess were unfriendly and they don't like to be bothered. Cos was a night flight and they need to sleep.

British Airways staff are very polite and willing to help.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

There were several issues with this flight. I have flown quite often internationally and I was surprised by the lack of presence of attendants other than meal and drink times. The food was not best but I feel that is the norm. We also had to get off the plane once in London via stairs and bus to the terminal. Anyone who had another flight had to then get another bus to another terminal. This causes me to miss my flight and have to rebook.

More room. International flight - by the time you put your purse and shoes under the seat in front of you, add in the pillow and blanket they give you- makes for tight fit.

Overall boarding and debarking is a joke. I dont even bring luggage anymore on trips because you can never allow them to be place then in the overhead bin or you have to pay or you check them which is even worse having to wait for your luggage on the tarmac.

The boarding process was a nightmare and though we were traveling business class, we were in Group 2 and the organization was terrible. The Business Class on this flight was crowded and did not feel clean and nice. Overall, I would not travel Business again on the American Airline flight through British Airways Not nearly special enough for the considerable cost .

Everything you need to know for your flight from St. Louis to Belfast

Information on your arrival and departure airports

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