Find flights
When to book
Airlines
FAQs

Cheap flights from Belfast to Illinois from £303

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
17 May — 24 May1
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 17 April 2026.

Mon 4/517:30
BHD
-
ORD
1 stop26h 45m
KLM
Mon 11/519:00
ORD
-
BHD
2 stops15h 55m
KLM
Deal found 16/4£708
Thu 10/919:30
BHD
-
ORD
1 stop25h 30m
British Airways
Mon 14/918:35
ORD
-
BHD
2 stops18h 50m
British Airways
Deal found 13/4£709
Sun 17/516:30
BFS
-
ORD
3 stops37h 26m
Multiple Airlines
Sun 24/509:55
ORD
-
BFS
2 stops29h 05m
Multiple Airlines
Deal found 17/4£714
Sun 10/516:30
BFS
-
ORD
3 stops37h 26m
Multiple Airlines
Sun 17/508:45
ORD
-
BFS
3 stops30h 15m
Multiple Airlines
Deal found 12/4£730
Sun 10/520:10
BHD
-
ORD
1 stop22h 15m
Multiple Airlines
Sun 17/522:30
ORD
-
BHD
1 stop14h 15m
Multiple Airlines
Deal found 12/4£734
Thu 28/520:05
BFS
-
ORD
2 stops30h 03m
Multiple Airlines
Thu 4/608:45
ORD
-
BFS
3 stops28h 10m
Multiple Airlines
Deal found 13/4£748
Sun 10/520:10
BHD
-
ORD
2 stops26h 11m
British Airways
Sun 17/522:30
ORD
-
BHD
1 stop14h 15m
British Airways
Deal found 12/4£750
Sun 31/509:55
BFS
-
ORD
2 stops18h 19m
Multiple Airlines
Sun 7/608:50
ORD
-
BFS
2 stops28h 00m
Multiple Airlines
Deal found 15/4£793
Mon 4/506:10
BFS
-
ORD
2 stops15h 45m
Multiple Airlines
Mon 11/514:20
ORD
-
BFS
2 stops19h 10m
Multiple Airlines
Deal found 16/4£941

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 17 April 2026.

Round-trip from

£709

One-way from

£303
British Airways
  • British Airways
  • 10/9-14/9
  • 3 total stops
  • 44h 20m total
  • Belfast to Illinois
Search Deals
8/6
  • 8/6
  • 3 total stops
  • 55h 21m 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 17 April 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

BHD - ORD

BHDORD

Belfast City

Mon 4/5

17:30-14:15

1 stop26h 45m

Chicago O'Hare Intl

Mon 11/5

19:00-16:55

2 stops15h 55m

£708

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 10/5

16:30-23:56

3 stops37h 26m

Chicago O'Hare Intl

Sun 17/5

08:45-21:00

3 stops30h 15m

£730

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 10/5

20:10-12:25

1 stop22h 15m

Chicago O'Hare Intl

Sun 17/5

22:30-18:45

1 stop14h 15m

£734

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 17/5

21:25-19:40

2 stops28h 15m

Chicago O'Hare Intl

Sun 24/5

09:55-21:00

2 stops29h 05m

£749

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 10/5

20:10-16:21

2 stops26h 11m

Chicago O'Hare Intl

Sun 17/5

22:30-18:45

1 stop14h 15m

£750

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 28/5

20:05-14:53

2 stops24h 48m

Chicago O'Hare Intl

Thu 4/6

09:55-18:55

2 stops27h 00m

£770
Fastest return journey

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 6/5

11:35-17:35

1 stop12h 00m

Chicago O'Hare Intl

Sun 10/5

22:30-17:40

1 stop13h 10m

£773

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 31/5

09:55-22:14

2 stops18h 19m

Chicago O'Hare Intl

Sun 7/6

08:50-18:50

2 stops28h 00m

£793

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 4/5

06:10-15:55

2 stops15h 45m

Chicago O'Hare Intl

Mon 11/5

14:20-15:30

2 stops19h 10m

£941
Cheapest one-way

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 8/6

18:50-20:11

3 stops55h 21m

£303

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 15 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 17 April 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
7,889 reviews
Check prices

Overall

6.7

Crew

7.7

Entertainment

6.4

Food

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
7,889 reviews
British Airways
6.7
Okay
7,889 reviews
Check prices

Overall

6.7

Crew

7.7

Entertainment

6.4

Food

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 KLM and British Airways fly from Belfast to Illinois in about 26h 11m. The time it takes to get you to your destination can typically vary by up to 34m. 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

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.
Belfast Intl to Orlando flights
Belfast Intl to John F Kennedy Intl flights
Belfast City to Orlando flights
Belfast City to John F Kennedy Intl flights
Belfast City to LaGuardia flights
Belfast Intl to Newark flights
Belfast City to Newark flights
Belfast Intl to Seattle flights
Belfast City to Seattle flights
Belfast Intl to Hobby flights
Belfast City to Boston flights
Belfast Intl to Boston flights
Belfast City to Fort Lauderdale flights
Belfast Intl to George Bush Intcntl flights
Belfast Intl to O'Hare Intl flights
Belfast Intl to Los Angeles flights
Belfast Intl to Las Vegas flights
Belfast City to San Francisco flights
Belfast Intl to San Francisco flights
Belfast City to O'Hare Intl flights
Belfast Intl to Charlotte flights
Belfast Intl to Detroit flights
Belfast City to Charlotte flights
Belfast City to Ontario flights
Belfast City to Los Angeles flights
Belfast Intl to Dulles Intl flights
Belfast City to Dulles Intl flights
Belfast Intl to Baltimore flights
Belfast City to Detroit flights
Belfast City to Reagan-National flights
Belfast City to Las Vegas flights
Belfast City to Pittsburgh flights
Belfast Intl to Miami flights
Belfast City to Grand Rapids flights
Belfast City to Baltimore flights
Belfast City to Dallas/Fort Worth flights
Belfast Intl to West Palm Beach flights
Belfast Intl to Minneapolis flights
Belfast City to Flint flights
Belfast City to Wichita flights
Belfast Intl to Omaha flights
Belfast Intl to Oklahoma City flights

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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£495Average£647FlexibilityNo 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.

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.