How long is the flight from Illinois to Belfast?

For as low as £501, British Airways can have you in Belfast from Illinois in 16h 51m. Airlines will cover a distance of 3647 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What are the most popular routes from Illinois to Belfast?

The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Lambert-St Louis - Belfast Intl.

What is the cheapest time of day to fly from IL to BFS?

When flying from Illinois to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Illinois to Belfast that include hotel bookings?

Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Illinois to Belfast?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast.

Can I find deals for business class flights from Illinois to Belfast?

Yes. Cheapflights offers flight deals from Illinois to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£190+ Flights from Illinois to Belfast

Cheap flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 décembre 2025.

mer. 31/1214:06STL - BHD

2 stops18h 09mAmerican Airlines

mer. 7/106:35BHD - STL

2 stops17h 59mAmerican Airlines

Deal found 16/12£816

mar. 30/1217:40ORD - BHD

2 stops15h 10mBritish Airways

lun. 5/119:25BHD - ORD

2 stops28h 22mBritish Airways

Deal found 16/12£972

jeu. 18/1220:40ORD - BHD

1 stop11h 20mBritish Airways

dim. 21/1212:10BHD - ORD

2 stops25h 09mBritish Airways

Deal found 15/12£989

mar. 30/1218:30ORD - BHD

1 stop11h 00mMultiple Airlines

lun. 5/119:25BHD - ORD

1 stop26h 00mMultiple Airlines

Deal found 15/12£1,235

jeu. 18/1219:40ORD - BFS

2 stops20h 20mMultiple Airlines

dim. 21/1207:25BFS - ORD

2 stops18h 35mMultiple Airlines

Deal found 15/12£1,297

jeu. 18/1218:30ORD - BHD

1 stop13h 30mAmerican Airlines

dim. 21/1206:30BHD - ORD

1 stop18h 15mAmerican Airlines

Deal found 15/12£1,306

jeu. 18/1213:05STL - BHD

2 stops25h 25mMultiple Airlines

jeu. 8/107:25BHD - STL

2 stops22h 34mMultiple Airlines

Deal found 15/12£1,392

jeu. 18/1213:54STL - BHD

2 stops18h 06mAmerican Airlines

jeu. 8/106:35BHD - STL

2 stops20h 40mAmerican Airlines

Deal found 15/12£1,462

jeu. 18/1205:00ORD - BHD

3 stops33h 30mMultiple Airlines

dim. 21/1209:50BHD - ORD

2 stops34h 10mMultiple Airlines

Deal found 15/12£1,804

jeu. 18/1215:50ORD - BHD

2 stops16h 15mAer Lingus

sam. 20/1218:55BHD - ORD

2 stops49h 05mAer Lingus

Deal found 14/12£1,945

jeu. 18/1217:26MDW - BHD

2 stops21h 34mKLM

dim. 21/1206:30BHD - MDW

2 stops16h 49mKLM

Deal found 15/12£2,596

jeu. 18/1217:26MDW - BHD

2 stops17h 24mKLM

sam. 20/1206:30BHD - MDW

2 stops16h 49mKLM

Deal found 14/12£2,761

Best flights from Illinois to Belfast
Discover carefully curated flight deals from Illinois to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 décembre 2025.

ven. 30/118:30ORD - BFS

2 stops21h 30mMultiple Airlines

ven. 6/208:05BFS - ORD

2 stops15h 15mMultiple Airlines

Deal found 16/12£451

lun. 12/117:04STL - BHD

2 stops17h 01mBritish Airways

mar. 20/106:35BHD - STL

2 stops17h 41mBritish Airways

Deal found 15/12£466

dim. 18/111:05ORD - BHD

2 stops23h 45mVirgin Atlantic

lun. 2/217:20BHD - ORD

2 stops30h 25mVirgin Atlantic

Deal found 16/12£501

dim. 18/117:59MDW - BHD

2 stops16h 51mKLM

lun. 2/217:20BHD - MDW

2 stops30h 09mKLM

Deal found 16/12£501

dim. 18/120:45ORD - BHD

1 stop11h 10mAmerican Airlines

dim. 25/106:30BHD - ORD

1 stop14h 55mAmerican Airlines

Deal found 15/12£517

jeu. 12/313:09MDW - BHD

2 stops22h 41mDelta

jeu. 19/306:30BHD - MDW

2 stops20h 59mDelta

Deal found 16/12£777

dim. 18/118:30ORD - BFS

2 stops18h 25mMultiple Airlines

lun. 2/222:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 16/12£469

lun. 12/116:33ORD - BHD

2 stops15h 42mBritish Airways

lun. 19/114:40BHD - ORD

2 stops35h 24mBritish Airways

Deal found 15/12£477

lun. 12/118:30ORD - BFS

2 stops19h 45mMultiple Airlines

lun. 19/122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 15/12£489

dim. 18/116:14ORD - BHD

2 stops15h 41mBritish Airways

lun. 2/217:45BHD - ORD

1 stop26h 05mBritish Airways

Deal found 16/12£495

dim. 18/116:14ORD - BHD

2 stops15h 41mBritish Airways

dim. 25/117:35BHD - ORD

1 stop26h 15mBritish Airways

Deal found 16/12£515

mer. 11/221:45ORD - BHD

1 stop12h 50mBritish Airways

dim. 15/215:10BHD - ORD

1 stop28h 40mBritish Airways

Deal found 14/12£525

jeu. 12/312:50ORD - BFS

3 stops26h 35mMultiple Airlines

jeu. 19/309:40BFS - ORD

3 stops35h 45mMultiple Airlines

Deal found 16/12£583

mer. 25/221:45ORD - BHD

1 stop12h 50mBritish Airways

dim. 1/310:40BHD - ORD

1 stop14h 05mBritish Airways

Deal found 14/12£525

mer. 31/1214:04STL - BHD

2 stops18h 11mAmerican Airlines

mer. 7/106:35BHD - STL

2 stops17h 59mAmerican Airlines

Deal found 15/12£816

jeu. 29/118:14MDW - BHD

2 stops16h 36mKLM

dim. 1/217:20BHD - MDW

2 stops30h 09mKLM

Deal found 16/12£817

jeu. 29/117:10ORD - BHD

1 stop11h 10mBritish Airways

dim. 1/212:10BHD - ORD

1 stop12h 35mBritish Airways

Deal found 16/12£539

mer. 4/211:05STL - BHD

2 stops21h 10mBritish Airways

dim. 8/217:35BHD - STL

2 stops33h 40mBritish Airways

Deal found 14/12£626

mer. 11/211:05STL - BHD

2 stops23h 30mBritish Airways

dim. 15/209:10BHD - STL

2 stops19h 44mBritish Airways

Deal found 15/12£630

ven. 6/215:37STL - BHD

2 stops19h 38mBritish Airways

mar. 10/219:25BHD - STL

2 stops33h 19mBritish Airways

Deal found 14/12£630

Last-minute flights from Illinois to Belfast
Discover last-minute flight deals from Illinois to Belfast. Data last updated 17 décembre 2025 and is based on user searches.

lun. 12/118:44STL - BHD

2 stops17h 51mBritish Airways

mar. 20/106:35BHD - STL

2 stops17h 41mBritish Airways

Deal found 16/12£466

lun. 12/116:33ORD - BHD

2 stops17h 32mBritish Airways

lun. 19/114:40BHD - ORD

1 stop29h 10mBritish Airways

Deal found 15/12£477

lun. 12/118:30ORD - BFS

2 stops19h 45mMultiple Airlines

lun. 19/122:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 15/12£489

dim. 18/118:30ORD - BFS

2 stops18h 25mMultiple Airlines

lun. 2/222:20BFS - ORD

3 stops46h 40mMultiple Airlines

Deal found 16/12£469

dim. 18/116:14ORD - BHD

2 stops15h 41mBritish Airways

lun. 2/217:45BHD - ORD

1 stop26h 05mBritish Airways

Deal found 16/12£495

dim. 18/111:05ORD - BHD

2 stops23h 45mVirgin Atlantic

lun. 2/217:20BHD - ORD

2 stops30h 25mVirgin Atlantic

Deal found 16/12£501

dim. 18/117:59MDW - BHD

2 stops16h 51mKLM

lun. 2/217:20BHD - MDW

2 stops30h 09mKLM

Deal found 16/12£501

dim. 18/116:14ORD - BHD

2 stops15h 41mBritish Airways

dim. 25/117:35BHD - ORD

1 stop26h 15mBritish Airways

Deal found 16/12£515

dim. 18/118:25ORD - BHD

1 stop13h 30mAmerican Airlines

dim. 25/109:10BHD - ORD

1 stop13h 50mAmerican Airlines

Deal found 16/12£516

jeu. 29/117:10ORD - BHD

1 stop11h 10mBritish Airways

dim. 1/212:10BHD - ORD

1 stop12h 35mBritish Airways

Deal found 16/12£539

jeu. 29/113:25ORD - BHD

2 stops14h 55mAmerican Airlines

dim. 1/206:30BHD - ORD

2 stops17h 12mAmerican Airlines

Deal found 16/12£571

ven. 30/118:30ORD - BFS

2 stops21h 30mMultiple Airlines

ven. 6/208:05BFS - ORD

2 stops15h 15mMultiple Airlines

Deal found 16/12£451

Find flight deals from Illinois to Belfast

Round-trip from	£451
One-way from	£190

30/1-6/2
4 total stops
36h 45m total
Illinois to Belfast

Search Deals

14/1
2 total stops
15h 40m total
Illinois to Belfast

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

ven. 30/1

18:30-22:00

2 stops21h 30m

Belfast Intl

ven. 6/2

08:05-17:20

2 stops15h 15m

£451

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

lun. 12/1

17:04-16:05

2 stops17h 01m

Belfast City

mar. 20/1

06:35-18:16

2 stops17h 41m

£466

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

dim. 18/1

18:30-18:55

2 stops18h 25m

Belfast Intl

lun. 2/2

22:20-15:00

3 stops46h 40m

£469

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

lun. 12/1

16:33-14:15

2 stops15h 42m

Belfast City

lun. 19/1

14:40-20:04

2 stops35h 24m

£477

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

lun. 12/1

18:30-20:15

2 stops19h 45m

Belfast Intl

lun. 19/1

22:20-15:00

3 stops46h 40m

£489

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

dim. 18/1

16:14-13:55

2 stops15h 41m

Belfast City

lun. 2/2

17:45-13:50

1 stop26h 05m

£495

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

dim. 18/1

11:05-16:50

2 stops23h 45m

Belfast City

lun. 2/2

17:20-17:45

2 stops30h 25m

£501

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

dim. 18/1

17:59-16:50

2 stops16h 51m

Belfast City

lun. 2/2

17:20-17:29

2 stops30h 09m

£501

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

dim. 18/1

16:14-13:55

2 stops15h 41m

Belfast City

dim. 25/1

17:35-13:50

1 stop26h 15m

£515

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

dim. 18/1

20:45-13:55

1 stop11h 10m

Belfast City

dim. 25/1

06:30-15:25

1 stop14h 55m

£517

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 21 results

Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Illinois with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Belfast

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Illinois to Belfast?
For as low as £501, British Airways can have you in Belfast from Illinois in 16h 51m. Airlines will cover a distance of 3647 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most popular routes from Illinois to Belfast?
The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Lambert-St Louis - Belfast Intl.
Can I find deals for flights from Illinois to Belfast that include hotel bookings?
Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Illinois to Belfast?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast.
Can I find deals for business class flights from Illinois to Belfast?
Yes. Cheapflights offers flight deals from Illinois to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Illinois to Belfast

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How does Cheapflights help users find flights from Illinois to Belfast?

Deals for Illinois to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Illinois to Belfast with no change fees?

Need flexible booking options for your flight to Belfast from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Belfast become cheaper?

Yes! Start tracking prices for Illinois to Belfast flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Illinois to Belfast from £190

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Belfast

Cheapest flights from Illinois to BelfastExplore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 décembre 2025.

Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 décembre 2025.

Find flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 17 décembre 2025.

Round-trip from

One-way from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Belfast

Related info for your journey

Find useful and relevant information for your journey from Illinois to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Illinois to Belfast?

What are the most popular routes from Illinois to Belfast?

Can I find deals for flights from Illinois to Belfast that include hotel bookings?

How can I find direct flights from Illinois to Belfast?

Can I find deals for business class flights from Illinois to Belfast?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Belfast

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Belfast?

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Can Cheapflights find flights from Illinois to Belfast with no change fees?

Can Cheapflights notify me if prices for flights from Illinois to Belfast become cheaper?

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Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 décembre 2025.