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Cheap flights from Belfast to Illinois from £299

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
2 Jun — 9 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Illinois

Enter your travel dates to find the best prices.

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 3 May 2026.

Tue 2/622:30
BFS
-
ORD
3 stops44h 35m
Multiple Airlines
Wed 17/609:55
ORD
-
BFS
2 stops25h 10m
Multiple Airlines
Deal found 2/5£641
Tue 17/1110:00
BHD
-
ORD
1 stop14h 45m
British Airways
Sat 28/1117:10
ORD
-
BHD
1 stop12h 00m
British Airways
Deal found 2/5£688
Thu 4/610:15
BFS
-
ORD
2 stops35h 45m
Multiple Airlines
Mon 8/616:37
ORD
-
BFS
2 stops22h 03m
Multiple Airlines
Deal found 30/4£689
Tue 17/1106:30
BHD
-
ORD
2 stops18h 10m
Multiple Airlines
Sat 28/1116:25
ORD
-
BHD
1 stop18h 25m
Multiple Airlines
Deal found 2/5£699
Wed 11/1106:35
BHD
-
ORD
2 stops18h 15m
British Airways
Sun 15/1116:06
ORD
-
BHD
2 stops15h 49m
British Airways
Deal found 29/4£706
Thu 4/607:00
BHD
-
ORD
2 stops18h 25m
Multiple Airlines
Mon 8/616:37
ORD
-
BHD
2 stops22h 13m
Multiple Airlines
Deal found 30/4£730
Sat 13/608:20
BFS
-
ORD
3 stops34h 50m
Multiple Airlines
Sat 20/607:25
ORD
-
BFS
3 stops33h 15m
Multiple Airlines
Deal found 29/4£797
Sun 14/608:25
BFS
-
ORD
2 stops19h 40m
Multiple Airlines
Sun 21/607:25
ORD
-
BFS
3 stops30h 50m
Multiple Airlines
Deal found 30/4£867

Find flight deals from Belfast to Illinois

Keep the following information in mind while searching for Belfast to Illinois flight deals. Data was last updated 3 May 2026.

Round-trip from

£641

One-way from

£299
2/6-17/6
  • 2/6-17/6
  • 5 total stops
  • 69h 45m total
  • Belfast to Illinois
Search Deals
15/10
  • 15/10
  • 3 total stops
  • 33h 00m total
  • Belfast to Illinois
Search Deals

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 3 May 2026.
Use the filters below to find and compare flights from Belfast to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 2/6

22:30-13:05

3 stops44h 35m

Chicago O'Hare Intl

Wed 17/6

09:55-17:05

2 stops25h 10m

£641

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 4/6

07:00-19:25

2 stops18h 25m

Chicago O'Hare Intl

Mon 8/6

16:37-20:50

2 stops22h 13m

£730

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sat 13/6

08:20-13:10

3 stops34h 50m

Chicago O'Hare Intl

Sat 20/6

07:25-22:40

3 stops33h 15m

£797
Fastest return journey

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 4/6

09:35-17:35

1 stop14h 00m

Chicago O'Hare Intl

Mon 8/6

22:30-17:30

1 stop13h 00m

£837

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 12/6

21:30-09:40

3 stops42h 10m

Chicago O'Hare Intl

Fri 19/6

21:00-21:15

2 stops18h 15m

£1,029

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 4/6

08:15-15:10

1 stop36h 55m

Chicago O'Hare Intl

Mon 8/6

14:20-08:50

2 stops36h 30m

£1,094
Cheapest one-way

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 15/10

07:00-17:50

3 stops40h 50m

£315

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 15/10

08:15-17:50

2 stops39h 35m

£364

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 6/10

18:10-11:50

2 stops47h 40m

£431

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 6/10

06:30-15:55

1 stop15h 25m

£458

Flights are sorted by cheapest return flights first.

Deals found on 1/5

Showing 1-10 of 16 resultsSorted by cheapest first
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
No data available for this route at this time. Please check back soon.

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 3 May 2026.
Read reviews from past customers who have flown with British Airways from Belfast to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,940 reviews
Check prices

Crew

7.7

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Overall

6.7

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,940 reviews
British Airways
6.7
Okay
7,940 reviews
Check prices

Crew

7.7

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Overall

6.7

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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.

  • How long is the flight from Belfast to Illinois?

    Airlines like American Airlines fly from Belfast to Illinois in about 14h. 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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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 3 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£494Average£646FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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 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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