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Cheap flights from Belfast to Illinois from £517

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
14 Feb — 21 Feb1
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 15 January 2026.

Fri 6/219:35
BHD
-
ORD
2 stops25h 20m
British Airways
Mon 9/219:49
ORD
-
BHD
2 stops33h 41m
British Airways
Deal found 13/1£517
Thu 29/120:00
BHD
-
ORD
1 stop25h 25m
British Airways
Mon 2/216:14
ORD
-
BHD
2 stops16h 01m
British Airways
Deal found 14/1£518
Sat 28/208:10
BFS
-
ORD
2 stops15h 10m
Multiple Airlines
Sat 7/318:30
ORD
-
BFS
2 stops15h 40m
Multiple Airlines
Deal found 14/1£583
Mon 30/311:35
BHD
-
ORD
1 stop30h 50m
Multiple Airlines
Sat 4/419:25
ORD
-
BHD
2 stops18h 15m
Multiple Airlines
Deal found 13/1£653

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 15 January 2026.

Round-trip from

£513
British Airways
  • British Airways
  • 6/2-9/2
  • 4 total stops
  • 42h 16m 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 15 January 2026.
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

Fri 6/2

19:35-14:55

2 stops25h 20m

Chicago O'Hare Intl

Mon 9/2

19:49-11:30

2 stops33h 41m

£517

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 29/1

20:00-17:00

1 stop27h 00m

Chicago O'Hare Intl

Mon 2/2

17:10-10:40

1 stop11h 30m

£518

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sat 28/2

08:10-17:20

2 stops15h 10m

Chicago O'Hare Intl

Sat 7/3

18:30-16:10

2 stops15h 40m

£583

Flights are sorted by cheapest return flights first.

Deals found on 13/1

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 15 January 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
7,680 reviews
Check prices

Crew

7.6

Food

6.4

Overall

6.7

Entertainment

6.4

Boarding

6.9

Comfort

6.8

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
7,680 reviews
British Airways
6.7
Okay
7,680 reviews
Check prices

Crew

7.6

Food

6.4

Overall

6.7

Entertainment

6.4

Boarding

6.9

Comfort

6.8

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 British Airways fly from Belfast to Illinois in about 25h 20m. 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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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 15 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£484Average£615FlexibilityNo 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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