How long is the flight from Belfast to Illinois?

Airlines like British Airways fly from Belfast to Illinois in about 13h 40m. The time it takes to get you to your destination can typically vary by up to . The distance from Belfast to Illinois is about 3644 mi.

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.

£614+ 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 16 September 2026.

Thu 29/1006:30 -

2 stops16h 50m

Thu 5/1118:30 -

2 stops16h 35m

Deal found 14/9£614

Thu 24/906:30 -

1 stop11h 55m

Mon 28/922:25 -

1 stop11h 05m

Deal found 14/9£631

Tue 20/1007:00 -

2 stops18h 15m

Tue 27/1016:55 -

2 stops23h 00m

Deal found 12/9£647

Thu 24/909:35 -

1 stop12h 20m

Mon 28/920:50 -

1 stop14h 35m

Deal found 14/9£648

Fri 27/1106:45 -

2 stops18h 59m

Mon 30/1121:50 -

1 stop10h 25m

Deal found 12/9£655

Thu 5/1111:05 -

1 stop13h 40m

Mon 9/1116:40 -

2 stops17h 25m

Deal found 15/9£676

Wed 4/1109:15 -

1 stop16h 15m

Sun 8/1117:10 -

1 stop14h 40m

Deal found 11/9£677

Tue 27/1015:55 -

2 stops30h 50m

Tue 3/1119:15 -

2 stops20h 55m

Deal found 12/9£681

Thu 1/1009:50 -

2 stops15h 25m

Mon 5/1018:05 -

1 stop12h 50m

Deal found 11/9£693

Thu 24/906:35 -

1 stop16h 40m

Mon 28/917:55 -

1 stop15h 35m

Deal found 14/9£711

Thu 8/1010:30 -

2 stops34h 40m

Mon 12/1017:10 -

2 stops20h 10m

Deal found 15/9£742

Fri 9/1006:15 -

2 stops33h 25m

Fri 16/1011:25 -

2 stops20h 50m

Deal found 11/9£811

Find flight deals from Belfast to Illinois

Round-trip from	£614

29/10-5/11
4 total stops
33h 25m total
Belfast to Illinois

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 20/10

07:00-19:15

2 stops18h 15m

Chicago O'Hare Intl

Tue 27/10

16:55-20:55

2 stops23h 00m

£647

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 5/11

11:05-18:45

1 stop13h 40m

Chicago O'Hare Intl

Mon 9/11

16:40-16:05

2 stops17h 25m

£676

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Wed 4/11

09:15-19:30

1 stop16h 15m

Chicago O'Hare Intl

Sun 8/11

17:10-13:50

1 stop14h 40m

£678

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 1/10

09:50-19:15

2 stops15h 25m

Chicago O'Hare Intl

Mon 5/10

17:00-15:30

2 stops16h 30m

£693

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Thu 29/10

08:50-17:15

1 stop13h 25m

Chicago O'Hare Intl

Thu 5/11

18:25-21:55

1 stop21h 30m

£728

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Thu 8/10

10:30-15:10

2 stops34h 40m

Chicago O'Hare Intl

Mon 12/10

17:10-19:20

2 stops20h 10m

£742

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 27/10

20:55-19:58

3 stops28h 03m

Chicago O'Hare Intl

Tue 3/11

18:30-20:55

3 stops20h 25m

£808

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 9/10

06:15-09:40

2 stops33h 25m

Chicago O'Hare Intl

Fri 16/10

11:25-14:15

2 stops20h 50m

£811

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 27/11

08:20-18:20

2 stops16h 00m

Chicago O'Hare Intl

Mon 30/11

18:30-21:30

3 stops21h 00m

£811

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Fri 9/10

07:00-15:03

3 stops38h 03m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£1,584

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 11 resultsSorted 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.

BFS-ORD

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

BFS-ORD

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 fly from Belfast to Illinois in about 13h 40m. The time it takes to get you to your destination can typically vary by up to . The distance from Belfast to Illinois is about 3644 mi.
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

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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.

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Cheap flights from Belfast to Illinois from £614

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/10. 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 16 September 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 16 September 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 16 September 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 16 September 2026.

Last-minute flights from Belfast to IllinoisDiscover last-minute flight deals from Belfast to Illinois. Data last updated 16 September 2026 and is based on user searches.

Discover last-minute flight deals from Belfast to Illinois. Data last updated 16 September 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 16 September 2026.

Search for one-way flight options from Belfast to Illinois. Find affordable one-way fares based on user searches. Data last updated 16 September 2026.

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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

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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

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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 16 September 2026.

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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?

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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 16 September 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 16 September 2026.

Last-minute flights from Belfast to Illinois
Discover last-minute flight deals from Belfast to Illinois. Data last updated 16 September 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 16 September 2026.