Are direct flights from St. Louis to Belfast always the best option?

Direct flights can offer convenience and save travel time, but they are not always the most budget-friendly choice. Flights with layovers may sometimes be significantly cheaper. Consider your priorities for cost versus travel duration when making your decision.

Can flexible travel dates help on St. Louis to Belfast flights?

Yes, being flexible with your travel dates can often unlock more affordable flight prices. Flying on weekdays or during off-peak seasons may result in lower fares compared to weekends or popular travel periods. Adjusting your departure or return by a few days can make a difference.

What extra costs should I check before booking St. Louis to Belfast flights?

Before booking, always check for potential extra costs such as baggage fees, seat selection charges, and in-flight services. Some airlines may also charge for printing boarding passes at the airport. Factor these into your total travel budget to avoid surprises.

Flights From St. Louis

To Belfast

Cheap Flights from St. Louis to Belfast

Browse current best options from St. Louis. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

St. Louis

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

Prices updated 4 days ago

476 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Oct 12, 2026.)

Today’s best flight deals from St. Louis to Belfast

Explore current cheapest deals departing from St. Louis to Belfast

2027-01-17 – 2027-01-21
STL - Belfast
73% AI deal score
$855
$996
Round trip
2027-01-11 – 2027-01-21
STL - Belfast
73% AI deal score
$786
$997
Round trip
2027-01-10 – 2027-01-21
STL - Belfast
73% AI deal score
$777
$997
Round trip
2027-01-11 – 2027-01-14
STL - Belfast
73% AI deal score
$851
$1,007
Round trip
2027-01-10 – 2027-01-14
STL - Belfast
73% AI deal score
$839
$1,007
Round trip
2026-12-02 – 2026-12-09
STL - Belfast
72% AI deal score
$992
$1,045
Round trip
2027-01-11 – 2027-01-17
STL - Belfast
72% AI deal score
$818
$1,055
Round trip
2027-01-10 – 2027-01-17
STL - Belfast
72% AI deal score
$806
$1,055
Round trip
2026-11-11 – 2026-12-07
STL - Belfast
71% AI deal score
$816
$1,065
Round trip
2026-11-11 – 2026-12-07
STL - Belfast
72% AI deal score
$792
$1,066
Round trip

St. Louis to Belfast: Overview

Insights for flights from St. Louis to Belfast

Most itineraries from St. Louis to Belfast connect at least once. Right now, there are no direct flights from St. Louis to Belfast, meaning all journeys will include at least one stopover. For connecting itineraries, the typical number of connections is 3.

A typical journey from St. Louis to Belfast takes about 22h 34m, including connections. This long-haul route covers a distance of 6248 km, making it a significant international trip.

When considering cheap flights from St. Louis to Belfast, the best time to fly is often in July, with a median fare of $358. April is also a more affordable option, with median fares around $459. Fares in May are somewhat higher, with a median of $555.

Fares for flights from St. Louis to Belfast typically range from $476–$582, with a median of $527. Right now, current fares are significantly below the typical level, indicating potential savings. Deals for this route are infrequent, so setting up a price alert can be beneficial.

How much is a round trip from St. Louis to Belfast

Regular price: $682 - $1,093

Prices for flights from St. Louis to Belfast are currently within the regular range.

The regular price range for flights from St. Louis to Belfast is between $682 and $1093. The current lowest deal is $974 with Air Canada, for travel from Jan 11-Jan 21.

now $974

Low $682

High $1,093

The cheapest time to fly from St. Louis to Belfast

The cheapest month to fly from St. Louis to Belfast is January, with a median price of $1018. The most expensive month is October, with a median price of $1161. Prices are generally lower from January to October.

January

Cheapest

Flights from $1,018

October

Most Expensive

Flights from $1,161

Jan

Oct

Direct flights from St. Louis to Belfast

Air Canada

easyJet UK

Aer Lingus

Air Transat

Last-minute flights going from St. Louis to Belfast

Tue, Oct 6

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, easyJet UK

$1,079

$3,926

One-way

Tue, Oct 6

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,056

$3,949

One-way

Thu, Oct 8

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, Air Transat, easyJet UK

$1,259

$3,861

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$939

$1,536

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,140

$3,041

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, WestJet, easyJet UK

$1,009

$3,409

One-way

Biggest price drops on these dates for flights from St. Louis to Belfast

7 nights

Oct 23 - Oct 30

$989 → $1,117

13%

3 nights

Feb 22 - Feb 25

$861 → $999

16%

9 nights

Oct 21 - Oct 30

$941 → $1,106

18%

3 nights

Jan 11 - Jan 14

$839 → $1,017

21%

Popular Airports to fly from St. Louis to Belfast

St. Louis - Belfast route insights

💸 Price insights

Recent fares are below the typical level

Recent fares from St. Louis to Belfast are below the typical level of $527.

📅 Best time to fly

July is historically cheapest at $358

Historically, July is the cheapest month to fly from St. Louis to Belfast, with a median price of $358.

⏱️ Flight duration

Connecting flights average 22h 34m

Flights from St. Louis to Belfast typically involve connections, with a median duration of 22h 34m.

✈️ Airlines & availability

Connecting flights are dominant

Direct flights are not available; connecting flights are the only option for this route.

🏆 Airline highlight

Air Canada offers deals for this route

Air Canada has 31 deals for flights on this route, making it a frequent option.

🎯 Booking tip

Deals are rare for this route

Deals for flights from St. Louis to Belfast are rare, so book when you see a good price.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a convenient option for flights from St. Louis to Belfast.

📍 ~20 km from city center (reachable by car)

💸 Flights from ~$970

Belfast main airports to arrive at

George Best Belfast City (BHD)

Cheapest

George Best Belfast City Airport offers a convenient arrival option for flights from St. Louis to Belfast.

📍 ~4 km from city center (reachable by car)

💸 Flights from ~$951

Airports nearby Belfast used as alternative

Dublin (DUB)

Cheapest

Dublin Airport offers a significantly larger route network and often more competitive pricing for travelers.

📍 ~140 km from Belfast (reachable by bus or rail, requires crossing the border).

💸 Flights from ~$690

Business & First Class Flight Deals to Belfast

Discover luxury on the budget with premium cabin class on flights from St. Louis to Belfast.

Elite

Best Elite deals to Belfast

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From STL

Elite

Jan 30

Belfast, United Kingdom

82% AI deal score

$6,208

$4,988

Save $1,220

Air Canada, +1

Business Class

From STL

Elite

Mar 07

Belfast, United Kingdom

81% AI deal score

$5,475

$4,817

Save $658

Air Canada, +1

Business Class

From STL

Elite

Jan 30

Belfast, United Kingdom

81% AI deal score

$5,970

$4,988

Save $982

Air Canada, +1

Business Class

From STL

Elite

Jan 30

Belfast, United Kingdom

81% AI deal score

$5,940

$4,988

Save $952

Air Canada, +1

Business Class

From STL

Elite

Dec 16

Belfast, United Kingdom

81% AI deal score

$5,968

$5,078

Save $890

Air Canada, +1

Business Class

From STL

Elite

Dec 11

Belfast, United Kingdom

81% AI deal score

$6,351

$5,384

Save $967

Air Canada, +1

Business Class

From STL

Elite

Mar 07

Belfast, United Kingdom

80% AI deal score

$5,564

$4,949

Save $615

Air Canada, +1

Business Class

From STL

Elite

Dec 16

Belfast, United Kingdom

80% AI deal score

$5,868

$5,076

Save $792

Air Canada, +1

Business Class

From STL

Elite

Dec 16

Belfast, United Kingdom

80% AI deal score

$5,875

$5,078

Save $797

Air Canada, +1

Business Class

From STL

Elite

Dec 11

Belfast, United Kingdom

80% AI deal score

$5,874

$5,116

Save $758

Air Canada, +1

Business Class

From STL

Elite

Jan 28

Belfast, United Kingdom

80% AI deal score

$5,910

$5,229

Save $681

Alaska Airlines, Inc., +1

Business Class

From STL

Elite

Jan 28

Belfast, United Kingdom

80% AI deal score

$5,884

$5,229

Save $655

Alaska Airlines, Inc., +1

Business Class

Frequently Asked Questions About Flights to Belfast

To find more affordable flights, consider being flexible with your travel dates and times. Comparing prices across different airlines and booking sites can also help identify better deals. Setting up price alerts may notify you when fares drop for your desired route.

Booking flights in advance often provides more options and potentially better prices. However, last-minute deals can sometimes appear, so monitoring fare trends is usually beneficial. The optimal booking time can vary based on demand and other factors.

Yes, comparing nearby airports at both your origin and destination can sometimes lead to more affordable flight options. Even if an alternative airport is a bit further, the savings on airfare may outweigh the additional ground transportation cost. It's always worth checking.

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Flights to Belfast from other cities

Flights from Alicante to Belfast Flights from Amsterdam to Belfast Flights from Barcelona to Belfast Flights from Birmingham to Belfast Flights from Bristol to Belfast Flights from Edinburgh to Belfast Flights from Glasgow to Belfast Flights from Greensboro to Belfast Flights from Leeds to Belfast Flights from Liverpool to Belfast Flights from London to Belfast Flights from Manchester to Belfast

St. Louis to Belfast: Overview

Insights for flights from St. Louis to Belfast

A typical journey from St. Louis to Belfast takes about 22h 34m, including connections. This long-haul route covers a distance of 6248 km, making it a significant international trip.

How much is a round trip from St. Louis to Belfast

Regular price: $682 - $1,093

Prices for flights from St. Louis to Belfast are currently within the regular range.

The regular price range for flights from St. Louis to Belfast is between $682 and $1093. The current lowest deal is $974 with Air Canada, for travel from Jan 11-Jan 21.

now $974

Low $682

High $1,093

The cheapest time to fly from St. Louis to Belfast

January

Cheapest

Flights from $1,018

October

Most Expensive

Flights from $1,161

Jan

Oct

Direct flights from St. Louis to Belfast

Air Canada

easyJet UK

Aer Lingus

Air Transat

Last-minute flights going from St. Louis to Belfast

Tue, Oct 6

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, easyJet UK

$1,079

$3,926

One-way

Tue, Oct 6

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,056

$3,949

One-way

Thu, Oct 8

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, Air Transat, easyJet UK

$1,259

$3,861

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$939

$1,536

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,140

$3,041

One-way

Sun, Oct 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, WestJet, easyJet UK

$1,009

$3,409

One-way

Biggest price drops on these dates for flights from St. Louis to Belfast

7 nights

Oct 23 - Oct 30

$989 → $1,117

13%

3 nights

Feb 22 - Feb 25

$861 → $999

16%

9 nights

Oct 21 - Oct 30

$941 → $1,106

18%

3 nights

Jan 11 - Jan 14

$839 → $1,017

21%

Popular Airports to fly from St. Louis to Belfast

St. Louis - Belfast route insights

💸 Price insights

Recent fares are below the typical level

Recent fares from St. Louis to Belfast are below the typical level of $527.

📅 Best time to fly

July is historically cheapest at $358

Historically, July is the cheapest month to fly from St. Louis to Belfast, with a median price of $358.

⏱️ Flight duration

Connecting flights average 22h 34m

Flights from St. Louis to Belfast typically involve connections, with a median duration of 22h 34m.

✈️ Airlines & availability

Connecting flights are dominant

Direct flights are not available; connecting flights are the only option for this route.

🏆 Airline highlight

Air Canada offers deals for this route

Air Canada has 31 deals for flights on this route, making it a frequent option.

🎯 Booking tip

Deals are rare for this route

Deals for flights from St. Louis to Belfast are rare, so book when you see a good price.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a convenient option for flights from St. Louis to Belfast.

📍 ~20 km from city center (reachable by car)

💸 Flights from ~$970

Belfast main airports to arrive at

George Best Belfast City (BHD)

Cheapest

George Best Belfast City Airport offers a convenient arrival option for flights from St. Louis to Belfast.

📍 ~4 km from city center (reachable by car)

💸 Flights from ~$951

Airports nearby Belfast used as alternative

Dublin (DUB)

Cheapest

Dublin Airport offers a significantly larger route network and often more competitive pricing for travelers.

Belfast, United Kingdom

80% AI deal score

$5,884

$5,229

Save $655

Alaska Airlines, Inc., +1

Business Class

Frequently Asked Questions About Flights to Belfast

Cheap Flights from St. Louis to Belfast

Today’s best flight deals from St. Louis to Belfast

St. Louis to Belfast: Overview

Insights for flights from St. Louis to Belfast

How much is a round trip from St. Louis to Belfast

The cheapest time to fly from St. Louis to Belfast

Direct flights from St. Louis to Belfast

Last-minute flights going from St. Louis to Belfast

Biggest price drops on these dates for flights from St. Louis to Belfast

Popular Airports to fly from St. Louis to Belfast

St. Louis - Belfast route insights

Recent fares are below the typical level

July is historically cheapest at $358

Connecting flights average 22h 34m

Connecting flights are dominant

Air Canada offers deals for this route

Deals are rare for this route

St. Louis main airports to depart from

Belfast main airports to arrive at

Airports nearby Belfast used as alternative

Business & First Class Flight Deals to Belfast

Best Elite deals to Belfast

Jan 30

Mar 07

Jan 30

Jan 30

Dec 16

Dec 11

Mar 07

Dec 16

Dec 16

Dec 11

Jan 28

Jan 28

Frequently Asked Questions About Flights to Belfast

How can I find cheap flights from St. Louis to Belfast?

When should I book flights from St. Louis to Belfast?

Should I compare nearby airports for flights from St. Louis to Belfast?

Are direct flights from St. Louis to Belfast always the best option?

Can flexible travel dates help on St. Louis to Belfast flights?

What extra costs should I check before booking St. Louis to Belfast flights?

Related routes

More routes from St. Louis

Flights to Belfast from other cities

St. Louis to Belfast: Overview

Insights for flights from St. Louis to Belfast

How much is a round trip from St. Louis to Belfast

The cheapest time to fly from St. Louis to Belfast

Direct flights from St. Louis to Belfast

Last-minute flights going from St. Louis to Belfast

Biggest price drops on these dates for flights from St. Louis to Belfast

Popular Airports to fly from St. Louis to Belfast

St. Louis - Belfast route insights

Recent fares are below the typical level

July is historically cheapest at $358

Connecting flights average 22h 34m

Connecting flights are dominant

Air Canada offers deals for this route

Deals are rare for this route

St. Louis main airports to depart from

Belfast main airports to arrive at

Airports nearby Belfast used as alternative

Business & First Class Flight Deals to Belfast

Best Elite deals to Belfast

Jan 30

Mar 07

Jan 30

Jan 30

Dec 16

Dec 11

Mar 07

Dec 16

Dec 16

Dec 11

Jan 28

Jan 28

Frequently Asked Questions About Flights to Belfast

How can I find cheap flights from St. Louis to Belfast?

When should I book flights from St. Louis to Belfast?

Should I compare nearby airports for flights from St. Louis to Belfast?