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

Direct flights offer convenience by reducing travel time and avoiding layovers, but they are not always the cheapest option. Flights with one or more connections can sometimes be significantly more affordable. Consider your budget and time constraints when deciding between direct and connecting flights.

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

Absolutely, having flexible travel dates can often lead to finding cheaper flights. Prices for airfare can vary significantly depending on the day of the week or even the time of day. Flying during off-peak seasons or weekdays may result in better deals.

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 2 days ago

444 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Aug 9, 2026.)

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

Explore current cheapest deals departing from St. Louis to Belfast

2026-10-19 – 2026-11-05
STL - Belfast
86% AI deal score
$896
$699
Round trip
2026-10-19 – 2026-11-05
STL - Belfast
86% AI deal score
$893
$701
Round trip
2026-10-18 – 2026-11-05
STL - Belfast
86% AI deal score
$895
$709
Round trip
2026-10-18 – 2026-11-05
STL - Belfast
85% AI deal score
$893
$713
Round trip
2026-10-21 – 2026-11-05
STL - Belfast
80% AI deal score
$896
$742
Round trip
2026-10-19 – 2026-11-04
STL - Belfast
79% AI deal score
$897
$759
Round trip
2026-10-20 – 2026-11-05
STL - Belfast
78% AI deal score
$897
$792
Round trip
2026-10-20 – 2026-11-05
STL - Belfast
78% AI deal score
$895
$794
Round trip
2026-10-20 – 2026-11-04
STL - Belfast
77% AI deal score
$896
$802
Round trip
2026-10-20 – 2026-11-04
STL - Belfast
77% AI deal score
$893
$805
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, with 0% of recent fares being non-stop. For the majority of flights that include connections, travelers typically encounter 3 stopovers.

For those seeking cheap flights from St. Louis to Belfast, prices are currently below the typical level. Fares for this route typically range from $476–$582, with a median of $527. New deals show up several times a week, making it possible to find more favorable prices.

If you are wondering when is the cheapest time to fly from St. Louis to Belfast, the data indicates that July is typically the most affordable month, with a median fare of $358. April also offers competitive pricing, with a median fare of $459, followed by May at $555.

A typical journey from St. Louis to Belfast takes approximately 22h 34m, including connections. This is a long-haul flight, covering a distance of 6248 km.

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

Regular price: $782 - $1,613

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

Regular prices for flights from St. Louis to Belfast typically range from $782 to $1613. The current lowest deal is $888 with Frontier Airlines for travel from Sep 6-Sep 12.

now $888

Low $782

High $1,613

The cheapest time to fly from St. Louis to Belfast

The cheapest month to fly from St. Louis to Belfast is August, with a median price of $320. The most expensive month is June, with a median price of $582. Prices are generally lower from February to November.

August

Cheapest

Flights from $320

June

Most Expensive

Flights from $582

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Belfast

Air Canada

easyJet UK

Aer Lingus

Frontier Airlines

Last-minute flights going from St. Louis to Belfast

Tue, Aug 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, WestJet, easyJet UK

$1,066

$1,769

One-way

Wed, Aug 12

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,302

$1,713

One-way

Thu, Aug 13

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,302

$3,264

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,086

$759

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,086

$799

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,081

$800

One-way

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

10 nights

Dec 1 - Dec 11

$1,039 → $934

10%

13 nights

Aug 18 - Aug 31

$1,094 → $1,002

6 nights

Sep 6 - Sep 12

$924 → $888

2 nights

Dec 6 - Dec 8

$1,088 → $1,143

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 at $888.

📅 Best time to fly

Fly in August for the best prices

Historically, August is the cheapest month to fly, with a median price of $320.

⏱️ 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 many deals

Air Canada has historically offered 39 deals for flights on this route.

🎯 Booking tip

Deals appear regularly

Deals for flights on this route appear regularly, about once a month.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

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

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

💸 Flights from ~$782

Belfast main airports to arrive at

George Best Belfast City (BHD)

Cheapest

George Best Belfast City Airport is a convenient arrival option for reaching Belfast and surrounding areas.

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

💸 Flights from ~$693

Airports nearby Belfast used as alternative

Dublin (DUB)

Cheapest

Dublin Airport is a major international hub offering a significantly larger route network than Belfast.

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

💸 Flights from ~$343

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

Oct 13

Belfast, United Kingdom

88% AI deal score

$6,406

$4,763

Save $1,643

Air Canada, +1

Business Class

From STL

Elite

Sep 27

Belfast, United Kingdom

83% AI deal score

$6,622

$5,108

Save $1,514

Air Canada, +1

Business Class

From STL

Elite

Aug 26

Belfast, United Kingdom

83% AI deal score

$6,690

$5,206

Save $1,484

Air Canada, +1

Business Class

From STL

Elite

Oct 13

Belfast, United Kingdom

82% AI deal score

$5,823

$4,759

Save $1,064

Air Canada, +1

Business Class

From STL

Elite

Oct 19

Belfast, United Kingdom

82% AI deal score

$5,913

$4,759

Save $1,154

Air Canada, +1

Business Class

From STL

Elite

Oct 19

Belfast, United Kingdom

82% AI deal score

$5,814

$4,762

Save $1,052

Air Canada, +1

Business Class

From STL

Elite

Nov 13

Belfast, United Kingdom

82% AI deal score

$6,105

$4,802

Save $1,303

Air Canada, +1

Business Class

From STL

Elite

Sep 27

Belfast, United Kingdom

82% AI deal score

$6,281

$5,111

Save $1,170

Air Canada, +1

Business Class

From STL

Elite

Sep 01

Belfast, United Kingdom

82% AI deal score

$6,469

$5,206

Save $1,263

Air Canada, +1

Business Class

From STL

Elite

Nov 16

Belfast, United Kingdom

81% AI deal score

$5,940

$5,054

Save $886

Air Canada, +1

Business Class

From STL

Elite

Nov 16

Belfast, United Kingdom

81% AI deal score

$6,115

$5,056

Save $1,059

Air Canada, +1

Business Class

From STL

Elite

Oct 06

Belfast, United Kingdom

81% AI deal score

$6,127

$5,064

Save $1,063

Air Canada, +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 you discover better deals. Setting up price alerts may notify you when fares drop for your desired route.

Booking flights in advance, often several months out, can sometimes result in lower prices. However, last-minute deals can occasionally appear, so it's wise to monitor fare trends. Prices may fluctuate, so there isn't a single best time for every booking.

Yes, comparing nearby airports for both your origin and destination can often reveal more flight options and potentially lower fares. Sometimes, flying into or out of a smaller airport a short distance away can be more economical. Always factor in the cost and time of ground transportation.

Related routes

More routes from St. Louis

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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 approximately 22h 34m, including connections. This is a long-haul flight, covering a distance of 6248 km.

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

Regular price: $782 - $1,613

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

Regular prices for flights from St. Louis to Belfast typically range from $782 to $1613. The current lowest deal is $888 with Frontier Airlines for travel from Sep 6-Sep 12.

now $888

Low $782

High $1,613

The cheapest time to fly from St. Louis to Belfast

August

Cheapest

Flights from $320

June

Most Expensive

Flights from $582

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Belfast

Air Canada

easyJet UK

Aer Lingus

Frontier Airlines

Last-minute flights going from St. Louis to Belfast

Tue, Aug 11

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BHD)

Air Canada, WestJet, easyJet UK

$1,066

$1,769

One-way

Wed, Aug 12

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,302

$1,713

One-way

Thu, Aug 13

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Air Canada, easyJet UK

$1,302

$3,264

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,086

$759

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,086

$799

One-way

Sun, Aug 16

⌛ Last-Minute

STL - Belfast

St. Louis (STL) - Belfast (BFS)

Frontier Airlines, Norse Atlantic UK, easyJet UK

$1,081

$800

One-way

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

10 nights

Dec 1 - Dec 11

$1,039 → $934

10%

13 nights

Aug 18 - Aug 31

$1,094 → $1,002

6 nights

Sep 6 - Sep 12

$924 → $888

2 nights

Dec 6 - Dec 8

$1,088 → $1,143

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 at $888.

📅 Best time to fly

Fly in August for the best prices

Historically, August is the cheapest month to fly, with a median price of $320.

⏱️ 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 many deals

Air Canada has historically offered 39 deals for flights on this route.

🎯 Booking tip

Deals appear regularly

Deals for flights on this route appear regularly, about once a month.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

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

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

💸 Flights from ~$782

Belfast main airports to arrive at

George Best Belfast City (BHD)

Cheapest

George Best Belfast City Airport is a convenient arrival option for reaching Belfast and surrounding areas.

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

💸 Flights from ~$693

Airports nearby Belfast used as alternative

Dublin (DUB)

Cheapest

Dublin Airport is a major international hub offering a significantly larger route network than Belfast.

Belfast, United Kingdom

81% AI deal score

$6,127

$5,064

Save $1,063

Air Canada, +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

Fly in August for the best prices

Connecting flights average 22h 34m

Connecting flights are dominant

Air Canada offers many deals

Deals appear regularly

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

Oct 13

Sep 27

Aug 26

Oct 13

Oct 19

Oct 19

Nov 13

Sep 27

Sep 01

Nov 16

Nov 16

Oct 06

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

Fly in August for the best prices

Connecting flights average 22h 34m

Connecting flights are dominant

Air Canada offers many deals

Deals appear regularly

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

Oct 13

Sep 27

Aug 26

Oct 13

Oct 19

Oct 19

Nov 13

Sep 27

Sep 01

Nov 16

Nov 16

Oct 06

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?