$802 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 9/12. 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
1 adult, Economy

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 (STL-BHD)

 
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.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Fri, Sep 12 - Sat, Jan 17
American Airlines Logo
2:02 pm - 3:30 pmSTL-BHD
19h 28m2 stops
American Airlines Logo
11:15 am - 9:49 pmBHD-STL
16h 34m2 stops
$802American Airlines
Find Deal
Fri, Oct 3 - Tue, Oct 7
Virgin Atlantic Logo
7:05 pm - 9:15 pmSTL-BHD
20h 10m2 stops
Virgin Atlantic Logo
6:30 am - 8:35 pmBHD-STL
20h 05m2 stops
$839Virgin Atlantic
Find Deal
Mon, Jul 14 - Mon, Jul 21
British Airways Logo
8:37 am - 5:30 pmSTL-BHD
26h 53m2 stops
British Airways Logo
7:30 pm - 8:24 pmBHD-STL
30h 54m2 stops
$1,115British Airways
Find Deal
Mon, Jul 14 - Mon, Jul 21
British Airways Logo
6:00 am - 5:30 pmSTL-BHD
29h 30m2 stops
British Airways Logo
7:30 pm - 8:24 pmBHD-STL
30h 54m2 stops
$1,120British Airways
Find Deal
Tue, Jul 15 - Mon, Jul 21
British Airways Logo
7:38 pm - 9:20 amSTL-BHD
31h 42m2 stops
British Airways Logo
6:25 pm - 8:24 pmBHD-STL
31h 59m2 stops
$1,122British Airways
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
9:15 am - 10:30 pmSTL-BFS
31h 15m3 stops
 Logo
11:45 pm - 7:45 pmBFS-STL
26h 00m3 stops
$1,248
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
9:15 am - 3:00 pmSTL-BFS
23h 45m3 stops
 Logo
11:45 pm - 7:45 pmBFS-STL
26h 00m3 stops
$1,253
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
9:15 am - 10:30 pmSTL-BFS
31h 15m2 stops
 Logo
10:00 pm - 7:45 pmBFS-STL
27h 45m2 stops
$1,340
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
9:15 am - 10:30 pmSTL-BFS
31h 15m3 stops
 Logo
10:00 pm - 7:45 pmBFS-STL
27h 45m2 stops
$1,363
Find Deal
Tue, Jul 15 - Mon, Jul 21
 Logo
9:15 am - 3:00 pmSTL-BFS
23h 45m3 stops
 Logo
10:00 pm - 3:16 pmBFS-STL
23h 16m2 stops
$1,368
Find Deal
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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 American Airlines ($802) and Virgin Atlantic ($839).

Good to know

Cheapest flight$802
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 $802 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, and SkyTeam are the airline alliances operating flights between St. Louis and Belfast, with oneworld being the most commonly used for this route.

  • 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.

Reviews of the 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
8.0Crew
7.2Comfort
6.5Food
Airline reviews

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

10.0 ExcellentBrian, Jun 2025SAN - LHR
Read more American Airlines reviews

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

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.

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

Information on your arrival and departure airports

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