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Cheap flights from Missouri to Belfast from $1,308

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Belfast departing on 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Missouri to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:55 am - 10:50 pmSTL  Lambert-St Louis-BFS Belfast Intl
31h 55m3 stops Toronto Pearson Intl Frankfurt am Main Birmingham
Multiple Airlines Logo
10:45 pm - 2:00 pmBFS  Belfast Intl-STL Lambert-St Louis
21h 15m2 stops Manchester Toronto Pearson Intl
$1,308Multiple Airlines
Thu, Sep 24 - Thu, Oct 1
Multiple Airlines Logo
8:55 am - 11:05 pmSTL  Lambert-St Louis-BFS Belfast Intl
32h 10m3 stops Toronto Pearson Intl Frankfurt am Main Birmingham
Multiple Airlines Logo
3:20 pm - 1:25 pmBFS  Belfast Intl-STL Lambert-St Louis
28h 05m2 stops Birmingham Frankfurt am Main
$2,165Multiple Airlines
Sat, Sep 26 - Sat, Oct 3
Multiple Airlines Logo
12:10 pm - 12:25 pmSTL  Lambert-St Louis-BFS Belfast Intl
18h 15m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat
Multiple Airlines Logo
3:20 pm - 1:25 pmBFS  Belfast Intl-STL Lambert-St Louis
28h 05m2 stops Birmingham Frankfurt am Main
$2,338Multiple Airlines
Sat, Sep 26 - Sat, Oct 3

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Customize your flight search to find flights from Missouri to Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated August 15, 2026.
Use the filters below to find and compare flights from Missouri to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Thu 9/24

8:55 am-10:50 pm

3 stops31h 55m

Belfast Intl

Thu 10/1

10:45 pm-2:00 pm

2 stops21h 15m

$1,308

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 9/26

8:55 am-11:05 pm

3 stops32h 10m

Belfast Intl

Sat 10/3

3:20 pm-1:25 pm

2 stops28h 05m

$2,165
Quickest round-trip

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 9/26

12:10 pm-12:25 pm

2 stops18h 15m

Belfast Intl

Sat 10/3

3:20 pm-1:25 pm

2 stops28h 05m

$2,338

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Belfast from

How to get the cheapest flight ticket from Missouri to Belfast Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

How long does it take to fly to Belfast Intl Airport?

On average, it takes 18h 44m to fly from Missouri to Belfast Intl Airport if you fly out of St. Louis (the most popular airport in Missouri) and into Belfast Intl Airport (the most popular airport in Belfast Intl Airport). If you’re flying out of Kansas City and into Belfast Intl Airport, then the flight time is around 23h 10m.

Cheap Missouri to Belfast Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Belfast Intl Airport

Fastest flight time

18h 44m

Direct flights

None
The fastest flight from Missouri to Belfast Intl Airport takes 18h 44m
There are no direct flights from Missouri to Belfast Intl Airport. There are no popular flight routes from Missouri to Belfast Intl Airport.
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Frequently asked questions about flying from Missouri to Belfast Intl Airport

  • When did momondo last update prices for flights from Missouri to Belfast Intl Airport?

    Prices for flights from Missouri to Belfast Intl Airport were last updated today.

  • How old do you have to be to fly from Missouri to Belfast Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Missouri to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents you'll need for your trip to Belfast Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Ballymena
Newry
Dungannon

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Belfast?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Missouri to Belfast for you.

Can I find flights from Missouri to Belfast with flexible booking policies on momondo?

All flight searches from Missouri to Belfast on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Missouri to Belfast?

momondo provides multiple filters to help you find the best flight to Belfast from Missouri. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Missouri to Belfast right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Belfast from Missouri. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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