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Cheap flights from Belfast to Illinois from £342

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
28 Apr — 5 May1
1 adult

Cheap flight deals from Belfast to Illinois

Keep the following information in mind while searching for Belfast to Illinois flight deals. Data was last updated 23 April 2025.

Round-trip from

£520

One-way from

£342

Popular in

March

Cheapest in

September

Average price

£745
KLM
  • KLM
  • 7/5-11/5
  • 3 total stops
  • 29h 40m total
  • Belfast to Illinois
Search Deals
12/8
  • 12/8
  • 2 total stops
  • 24h 32m total
  • Belfast to Illinois
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£191 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£41 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Belfast to Illinois

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 23 April 2025.

Wed 7/506:30BHD - ORD
1 stop14h 10mKLM
Sun 11/519:25ORD - BHD
2 stops15h 30mKLM
Deal found 23/4£520
Wed 7/506:30BHD - ORD
2 stops21h 44mDelta
Sun 11/519:25ORD - BHD
2 stops19h 50mDelta
Deal found 23/4£524
Wed 7/516:05BHD - ORD
1 stop25h 40mAmerican Airlines
Sun 11/519:15ORD - BHD
1 stop11h 50mAmerican Airlines
Deal found 22/4£525
Wed 7/506:50BHD - ORD
1 stop13h 50mBritish Airways
Sun 11/522:25ORD - BHD
1 stop13h 20mBritish Airways
Deal found 23/4£598
Sat 7/609:35BHD - ORD
1 stop14h 40mIberia
Sat 14/617:10ORD - BHD
2 stops15h 55mIberia
Deal found 23/4£635
Sat 7/607:00BHD - ORD
2 stops22h 29mMultiple Airlines
Sat 14/610:50ORD - BHD
3 stops20h 55mMultiple Airlines
Deal found 23/4£668
Fri 6/616:40BFS - ORD
3 stops46h 30mMultiple Airlines
Fri 13/616:43ORD - BFS
2 stops21h 22mMultiple Airlines
Deal found 22/4£689
Mon 2/606:30BHD - ORD
2 stops16h 15mVirgin Atlantic
Fri 6/617:40ORD - BHD
2 stops21h 35mVirgin Atlantic
Deal found 22/4£1,186

Cheapflights Fare Finder

Customise your flight search to find flights from Belfast to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 23 April 2025.
Use the filters below to find and compare flights from Belfast to Illinois that are best for you.

Fly from

Belfast

Fly to

Illinois

Route

Depart

Return

Price

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 7/5

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

Sun 11/5

19:25-16:55

2 stops15h 30m

£520

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 7/5

06:30-22:14

2 stops21h 44m

Chicago O'Hare Intl

Sun 11/5

19:25-21:15

2 stops19h 50m

£524

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 7/5

16:05-11:45

1 stop25h 40m

Chicago O'Hare Intl

Sun 11/5

19:15-13:05

1 stop11h 50m

£525

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 7/5

06:50-14:40

1 stop13h 50m

Chicago O'Hare Intl

Sun 11/5

22:25-17:45

1 stop13h 20m

£598

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sat 7/6

09:35-18:15

1 stop14h 40m

Chicago O'Hare Intl

Sat 14/6

17:10-15:05

2 stops15h 55m

£635

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sat 7/6

07:00-23:29

2 stops22h 29m

Chicago O'Hare Intl

Sat 14/6

10:50-13:45

3 stops20h 55m

£668

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 6/6

16:40-09:10

3 stops46h 30m

Chicago O'Hare Intl

Fri 13/6

16:43-20:05

2 stops21h 22m

£689

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 2/6

06:30-14:10

1 stop13h 40m

Chicago O'Hare Intl

Fri 6/6

17:40-21:15

2 stops21h 35m

£1,182

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 12/8

22:55-17:27

2 stops24h 32m

£342

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 12/8

18:50-17:27

2 stops28h 37m

£418

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 16 results
1
2

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.
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

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

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.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 23 April 2025.
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,920 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,272 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

  • What are the cheapest airlines to fly from Belfast to Illinois one-way?

    £607 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Finnair and British Airways, with prices starting from £736 and £777, respectively.

  • 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.

  • What is the cheapest month to book a flight from Belfast to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Belfast to Illinois (average of £595). Flying from Belfast to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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.
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Top airline flying from Belfast to Illinois

Discover the top airline that operate flights from Belfast to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 23 April 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£486Average£592FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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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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