How long is the flight from Illinois to Belfast?

For as low as £633, Delta can have you in Belfast from Illinois in 10h 45m. Airlines will cover a distance of 3644 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 Chicago Midway - Belfast City.

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.

£232+ Cheap Flights from Illinois to Belfast

Cheap flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 12 September 2026.

Thu 26/1118:30 -

2 stops21h 25m

Tue 1/1207:05 -

2 stops16h 15m

Deal found 10/9£534

Fri 27/1118:30 -

2 stops20h 10m

Tue 1/1220:55 -

3 stops26h 25m

Deal found 10/9£560

Sun 20/916:15 -

1 stop11h 05m

Mon 5/1017:30 -

1 stop26h 45m

Deal found 9/9£575

Sun 20/916:15 -

1 stop18h 40m

Mon 5/1017:30 -

1 stop26h 45m

Deal found 9/9£591

Tue 27/1019:30 -

2 stops20h 25m

Tue 3/1120:35 -

3 stops26h 45m

Deal found 12/9£596

Thu 5/1118:30 -

2 stops18h 20m

Sat 14/1115:25 -

3 stops30h 05m

Deal found 9/9£601

Mon 26/1019:30 -

2 stops20h 05m

Mon 2/1122:05 -

3 stops25h 15m

Deal found 10/9£605

Thu 5/1116:25 -

1 stop18h 10m

Sat 14/1117:15 -

1 stop27h 10m

Deal found 9/9£665

Mon 28/919:05 -

1 stop14h 25m

Fri 9/1011:00 -

2 stops16h 05m

Deal found 9/9£665

Thu 26/1116:25 -

1 stop18h 10m

Tue 1/1217:20 -

1 stop27h 05m

Deal found 10/9£667

Thu 26/1113:35 -

2 stops21h 00m

Tue 1/1217:20 -

1 stop27h 05m

Deal found 10/9£670

Thu 5/1116:25 -

1 stop18h 10m

Sat 14/1109:40 -

2 stops20h 14m

Deal found 9/9£672

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 12 September 2026.

Thu 26/1118:30 -

2 stops21h 25m

Tue 1/1207:05 -

2 stops16h 15m

Deal found 10/9£534

Sat 9/116:25 -

1 stop10h 45m

Wed 27/117:20 -

1 stop27h 05m

Deal found 12/9£633

Sun 31/111:10 -

2 stops16h 00m

Mon 8/209:40 -

2 stops20h 10m

Deal found 10/9£645

Thu 19/1116:25 -

1 stop18h 10m

Tue 24/1117:15 -

1 stop27h 10m

Deal found 11/9£679

Tue 12/121:50 -

1 stop11h 00m

Sun 31/106:30 -

1 stop18h 15m

Deal found 12/9£699

Tue 27/1019:30 -

2 stops20h 25m

Tue 3/1120:35 -

3 stops26h 45m

Deal found 12/9£596

Sun 31/113:00 -

2 stops14h 10m

Mon 8/209:40 -

2 stops18h 30m

Deal found 10/9£645

Wed 13/109:50 -

2 stops17h 20m

Wed 27/117:20 -

1 stop27h 05m

Deal found 12/9£659

Thu 5/1118:30 -

3 stops19h 50m

Sat 14/1115:25 -

3 stops30h 05m

Deal found 9/9£618

Fri 27/1117:10 -

1 stop14h 55m

Tue 1/1211:40 -

1 stop13h 05m

Deal found 10/9£726

Thu 14/116:25 -

1 stop18h 25m

Sat 30/117:20 -

1 stop27h 05m

Deal found 12/9£670

Mon 26/1019:30 -

3 stops19h 25m

Mon 2/1122:05 -

3 stops25h 15m

Deal found 10/9£623

Fri 8/121:50 -

1 stop13h 35m

Mon 25/111:40 -

1 stop13h 05m

Deal found 12/9£736

Sat 9/116:25 -

1 stop10h 45m

Fri 29/117:20 -

1 stop27h 05m

Deal found 12/9£670

Wed 13/118:25 -

1 stop12h 40m

Mon 25/114:40 -

2 stops34h 35m

Deal found 12/9£672

Fri 25/916:30 -

2 stops19h 40m

Mon 28/919:35 -

1 stop26h 20m

Deal found 9/9£781

Thu 26/1112:05 -

2 stops15h 05m

Tue 1/1209:40 -

2 stops19h 15m

Deal found 10/9£891

Thu 19/1120:05 -

2 stops19h 50m

Tue 24/1107:05 -

2 stops17h 15m

Deal found 11/9£673

Mon 11/118:30 -

2 stops18h 40m

Thu 28/114:40 -

2 stops32h 40m

Deal found 12/9£677

Mon 1/311:31 -

2 stops17h 19m

Wed 3/317:35 -

2 stops36h 23m

Deal found 11/9£852

Fri 27/1118:30 -

2 stops20h 35m

Tue 1/1207:20 -

2 stops18h 38m

Deal found 10/9£678

Fri 26/218:30 -

3 stops21h 30m

Sun 7/320:00 -

2 stops28h 20m

Deal found 7/9£711

Sun 31/118:30 -

2 stops19h 45m

Mon 8/208:30 -

2 stops14h 50m

Deal found 10/9£729

Mon 16/1113:15 -

2 stops15h 35m

Wed 18/1117:35 -

2 stops32h 58m

Deal found 7/9£1,095

Tue 1/1218:30 -

2 stops20h 00m

Sat 5/1207:25 -

2 stops18h 33m

Deal found 11/9£761

Fri 2/1019:01 -

2 stops15h 54m

Sat 10/1017:30 -

2 stops28h 44m

Deal found 12/9£1,501

Mon 28/910:48 -

2 stops16h 32m

Fri 9/1009:50 -

2 stops18h 43m

Deal found 9/9£1,504

Fri 25/919:01 -

2 stops15h 54m

Mon 28/909:50 -

2 stops18h 54m

Deal found 9/9£1,723

Find flight deals from Illinois to Belfast

Round-trip from	£534
One-way from	£232

26/11-1/12
4 total stops
37h 40m total
Illinois to Belfast

Search Deals

11/1-31/12
2 total stops
15h 55m total
Illinois to Belfast

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 11/1

18:30-16:25

2 stops15h 55m

Belfast Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£232

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 27/9

22:25-07:05

2 stops50h 40m

Belfast Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£236

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Mon 11/1

21:50-16:05

1 stop12h 15m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£239

Fastest return journey

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Sun 31/1

17:10-10:45

1 stop11h 35m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£239

ChicagoBelfast

MDW Chicago Midway - BHD Belfast City

MDWBHD

Chicago Midway

Tue 12/1

09:30-09:10

2 stops17h 40m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£250

ChicagoBelfast

MDW Chicago Midway - BHD Belfast City

MDWBHD

Chicago Midway

Sun 10/1

09:55-09:10

2 stops17h 15m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£250

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Wed 13/1

09:50-09:10

2 stops17h 20m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£255

ChicagoBelfast

MDW Chicago Midway - BHD Belfast City

MDWBHD

Chicago Midway

Wed 13/1

12:30-09:10

2 stops14h 40m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£255

ChicagoBelfast

MDW Chicago Midway - BHD Belfast City

MDWBHD

Chicago Midway

Sun 31/1

12:30-09:10

2 stops14h 40m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£258

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Sat 30/1

21:36-10:45

2 stops31h 09m

Belfast City

Wed 31/12

00:00-17:00

Nonstop0h 00m

£270

Flights are sorted by cheapest return flights first.

Deals found on 12/9

Showing 1-10 of 49 resultsSorted by cheapest first

...

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.

ORD-BFS

ORD-BHD

MDW-BHD

STL-BHD

MDW-BFS

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

USIL-BF1

ORD-BFS

ORD-BHD

MDW-BHD

STL-BHD

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 £633, Delta can have you in Belfast from Illinois in 10h 45m. Airlines will cover a distance of 3644 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 Chicago Midway - Belfast City.
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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

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Flights by cabin class

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Popular flights

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 £232

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. 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 12 September 2026.

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 12 September 2026.

Best flights from Illinois to BelfastDiscover 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 12 September 2026.

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 12 September 2026.

Last-minute flights from Illinois to BelfastDiscover last-minute flight deals from Illinois to Belfast. Data last updated 12 September 2026 and is based on user searches.

Discover last-minute flight deals from Illinois to Belfast. Data last updated 12 September 2026 and is based on user searches.

One-way flights from Illinois to BelfastSearch for one-way flight options from Illinois to Belfast. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Search for one-way flight options from Illinois to Belfast. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Find flight deals from Illinois to Belfast

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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

Related info for your journey

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.

Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Northern Ireland

Book a non-stop flight to one of these other cities located in Northern Ireland.

Search flights from Illinois to Belfast by cabin class

Find flights from Illinois to Belfast, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Illinois and Belfast flights

Browse other Illinois and Belfast flight options. Last updated on 12 September 2026.

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

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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 12 September 2026.

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 12 September 2026.

Last-minute flights from Illinois to Belfast
Discover last-minute flight deals from Illinois to Belfast. Data last updated 12 September 2026 and is based on user searches.

One-way flights from Illinois to Belfast
Search for one-way flight options from Illinois to Belfast. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.