How long is the flight from Belfast to Illinois?

Airlines like British Airways and Iberia fly from Belfast to Illinois in about 13h 10m. The time it takes to get you to your destination can typically vary by up to 15h 35m. The distance from Belfast to Illinois is about 3644 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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

When flying from Belfast to Illinois, 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 Belfast to Illinois that include hotel bookings?

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

How can I find direct flights from Belfast to Illinois?

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

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

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

£329+ Cheap Flights from Belfast to Illinois

Cheap flight deals from Belfast to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Belfast to Illinois
Explore the most affordable flight options available from Belfast to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 November 2026.

Thu 3/1206:30 -

1 stop13h 15m

Mon 7/1220:30 -

1 stop14h 55m

Deal found 12/11£850

Thu 3/1206:30 -

2 stops19h 13m

Mon 7/1215:19 -

2 stops13h 31m

Deal found 11/11£863

Sat 21/1117:55 -

2 stops26h 15m

Wed 25/1115:55 -

2 stops15h 15m

Deal found 13/11£918

Sun 20/1215:30 -

2 stops28h 40m

Mon 18/121:00 -

2 stops29h 25m

Deal found 14/11£931

Sat 21/1114:20 -

3 stops31h 10m

Wed 25/1119:00 -

2 stops18h 00m

Deal found 13/11£932

Sun 20/1218:10 -

3 stops29h 10m

Mon 18/118:30 -

2 stops16h 50m

Deal found 10/11£940

Sun 20/1217:15 -

1 stop27h 10m

Mon 18/116:25 -

1 stop10h 45m

Deal found 14/11£945

Find flight deals from Belfast to Illinois

Round-trip from	£713
One-way from	£329

British Airways
19/1-26/1
2 total stops
25h 30m total
Belfast to Illinois

Search Deals

20/3-31/12
3 total stops
43h 00m total
Belfast to Illinois

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Sat 20/3

07:25-21:25

3 stops43h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£329

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Sun 21/3

08:20-18:20

3 stops39h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£368

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Sun 21/3

15:15-20:15

1 stop34h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£566

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Tue 19/1

06:35-13:45

1 stop13h 10m

Chicago O'Hare Intl

Tue 26/1

12:06-10:50

2 stops16h 44m

£716

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 21/1

20:00-18:45

1 stop28h 45m

Chicago O'Hare Intl

Mon 25/1

16:50-17:25

2 stops18h 35m

£797

Fastest return journey

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 25/2

06:30-13:45

1 stop13h 15m

Chicago O'Hare Intl

Mon 1/3

21:50-17:25

1 stop13h 35m

£797

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 25/2

06:30-13:45

1 stop13h 15m

Chicago O'Hare Intl

Mon 1/3

15:36-14:15

2 stops16h 39m

£800

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 21/1

06:30-17:24

2 stops16h 54m

Chicago O'Hare Intl

Mon 25/1

12:06-09:05

2 stops14h 59m

£806

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 3/12

06:30-13:45

1 stop13h 15m

Chicago O'Hare Intl

Mon 7/12

20:30-17:25

1 stop14h 55m

£850

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 3/12

06:30-19:43

2 stops19h 13m

Chicago O'Hare Intl

Mon 7/12

15:19-10:50

2 stops13h 31m

£863

Flights are sorted by cheapest return flights first.

Deals found on 14/11

Sorted by cheapest first

Best time to book a flight from Belfast to Illinois

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

BHD-ORD

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 Belfast to Illinois

BF1-USIL

BHD-ORD

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

Related info for your journey

How long is the flight from Belfast to Illinois?
Airlines like British Airways and Iberia fly from Belfast to Illinois in about 13h 10m. The time it takes to get you to your destination can typically vary by up to 15h 35m. The distance from Belfast to Illinois is about 3644 mi. This flight may include one or multiple stops.
Can I find deals for flights from Belfast to Illinois that include hotel bookings?
Yes. In addition to deals on Belfast to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Illinois.
Can I find deals for business class flights from Belfast to Illinois?
Yes. Cheapflights offers flight deals from Belfast to Illinois 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

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Alternative routes for Belfast to Illinois

Belfast Intl to John F Kennedy Intl flights

Belfast Intl to Newark flights

Belfast City to John F Kennedy Intl flights

Belfast City to LaGuardia flights

Belfast Intl to Los Angeles flights

Belfast Intl to Hobby flights

Belfast City to Newark flights

Belfast City to O'Hare Intl flights

Belfast Intl to O'Hare Intl flights

Belfast Intl to Boston flights

Belfast City to Los Angeles flights

Belfast Intl to Dallas/Fort Worth flights

Belfast City to Dallas/Fort Worth flights

Belfast City to George Bush Intcntl flights

Belfast Intl to George Bush Intcntl flights

Belfast Intl to Seattle flights

Belfast Intl to Las Vegas flights

Belfast City to Fort Lauderdale flights

Belfast Intl to Fort Lauderdale flights

Belfast City to Boston flights

Belfast City to Seattle flights

Belfast Intl to Miami flights

Belfast Intl to Dulles Intl flights

Belfast City to San Francisco flights

Belfast City to Las Vegas flights

Belfast Intl to San Francisco flights

Belfast Intl to Atlanta flights

Belfast Intl to Orlando flights

Belfast City to Miami flights

Belfast City to Dulles Intl flights

Belfast City to Santa Ana flights

Belfast City to Ontario flights

Belfast City to Orlando flights

Belfast Intl to Charlotte flights

Belfast Intl to Pittsburgh flights

Belfast City to Charlotte flights

Belfast City to Atlanta flights

Belfast Intl to Santa Ana flights

Belfast Intl to Ontario flights

Belfast Intl to New Orleans flights

Belfast City to Omaha flights

Belfast Intl to Detroit flights

Belfast City to Detroit flights

Belfast Intl to Jacksonville flights

Belfast City to New Orleans flights

Belfast City to Baltimore flights

Belfast City to Colorado Springs flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Belfast to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast to Illinois for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to Illinois from Belfast? 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 Belfast to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from Belfast today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Belfast to Illinois from £329

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Belfast to Illinois

Cheapest flights from Belfast to IllinoisExplore the most affordable flight options available from Belfast to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 November 2026.

Explore the most affordable flight options available from Belfast to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 November 2026.

Best flights from Belfast to IllinoisDiscover carefully curated flight deals from Belfast to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 November 2026.

Discover carefully curated flight deals from Belfast to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 November 2026.

Last-minute flights from Belfast to IllinoisDiscover last-minute flight deals from Belfast to Illinois. Data last updated 15 November 2026 and is based on user searches.

Discover last-minute flight deals from Belfast to Illinois. Data last updated 15 November 2026 and is based on user searches.

One-way flights from Belfast to IllinoisSearch for one-way flight options from Belfast to Illinois. Find affordable one-way fares based on user searches. Data last updated 15 November 2026.

Search for one-way flight options from Belfast to Illinois. Find affordable one-way fares based on user searches. Data last updated 15 November 2026.

Find flight deals from Belfast to Illinois

Round-trip from

One-way from

Cheapflights Fare Finder

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

Best time to book a flight from Belfast to Illinois

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

Cheapflights Insights

Related info for your journey

How long is the flight from Belfast to Illinois?

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

How can I find direct flights from Belfast to Illinois?

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

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 Belfast to Illinois

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

Complete your trip

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

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Belfast to Illinois by cabin class

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

Belfast and Illinois flights

Browse other Belfast and Illinois flight options. Last updated on 15 November 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Belfast to Illinois
Explore the most affordable flight options available from Belfast to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 November 2026.

Best flights from Belfast to Illinois
Discover carefully curated flight deals from Belfast to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 November 2026.

Last-minute flights from Belfast to Illinois
Discover last-minute flight deals from Belfast to Illinois. Data last updated 15 November 2026 and is based on user searches.

One-way flights from Belfast to Illinois
Search for one-way flight options from Belfast to Illinois. Find affordable one-way fares based on user searches. Data last updated 15 November 2026.