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Cheap flights from Illinois to Belfast from £248

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
29 Apr — 6 May1
1 adult

Cheap flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 24 April 2025.

Round-trip from

£507

One-way from

£248

Popular in

May

Cheapest in

September

Average price

£1,009
3/6-10/6
  • 3/6-10/6
  • 4 total stops
  • 61h 45m total
  • Illinois to Belfast
Search Deals
17/8
  • 17/8
  • 2 total stops
  • 32h 50m total
  • Illinois to Belfast
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. 6% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Illinois to Belfast

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 April 2025.

Mon 28/417:45ORD - BHD
1 stop13h 10mAmerican Airlines
Tue 13/516:25BHD - ORD
1 stop25h 20mAmerican Airlines
Deal found 24/4£506
Tue 3/616:43ORD - BFS
2 stops17h 57mMultiple Airlines
Tue 10/606:15BFS - ORD
2 stops43h 48mMultiple Airlines
Deal found 23/4£507
Sun 27/416:20ORD - BHD
1 stop22h 55mVirgin Atlantic
Tue 13/506:30BHD - ORD
1 stop13h 40mVirgin Atlantic
Deal found 22/4£536
Mon 28/418:15ORD - BHD
2 stops16h 40mKLM
Tue 13/506:30BHD - ORD
2 stops16h 59mKLM
Deal found 24/4£537
Thu 21/817:00ORD - BHD
1 stop14h 15mBritish Airways
Thu 4/912:40BHD - ORD
1 stop11h 35mBritish Airways
Deal found 24/4£539
Mon 5/519:25ORD - BHD
2 stops19h 25mMultiple Airlines
Thu 8/520:15BHD - ORD
2 stops33h 14mMultiple Airlines
Deal found 23/4£634
Sun 27/716:20ORD - BHD
1 stop22h 55mDelta
Mon 4/817:25BHD - ORD
1 stop26h 45mDelta
Deal found 22/4£694
Mon 28/713:05MDW - BHD
2 stops26h 10mDelta
Mon 4/806:30BHD - MDW
2 stops38h 26mDelta
Deal found 22/4£706
Tue 3/610:25MDW - BFS
2 stops28h 55mMultiple Airlines
Tue 10/607:45BFS - MDW
2 stops20h 00mMultiple Airlines
Deal found 24/4£810
Tue 15/713:16STL - BHD
2 stops17h 44mBritish Airways
Mon 21/719:30BHD - STL
2 stops30h 54mBritish Airways
Deal found 24/4£825
Sun 27/721:15ORD - BHD
2 stops15h 30mAer Lingus
Fri 1/810:10BHD - ORD
2 stops14h 50mAer Lingus
Deal found 22/4£1,016
Tue 15/707:23STL - BHD
3 stops23h 27mAer Lingus
Mon 21/707:00BHD - STL
3 stops30h 56mAer Lingus
Deal found 23/4£1,207

Cheapflights Fare Finder

Customise your flight search to find flights from Illinois to Belfast 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 24 April 2025.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Illinois

Fly to

Belfast

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 3/6

16:43-16:40

2 stops17h 57m

Belfast Intl

Tue 10/6

06:15-20:03

2 stops43h 48m

£507

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 21/8

17:00-13:15

1 stop14h 15m

Belfast City

Thu 4/9

12:40-18:15

1 stop11h 35m

£539

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 18/8

21:15-17:30

1 stop14h 15m

Belfast City

Sun 24/8

20:05-13:50

1 stop23h 45m

£540

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 21/8

21:15-15:30

1 stop12h 15m

Belfast City

Thu 4/9

06:35-15:45

2 stops15h 10m

£543

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 18/8

21:30-10:35

2 stops31h 05m

Belfast City

Sun 24/8

20:05-15:05

1 stop25h 00m

£554

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 27/7

16:20-21:15

1 stop22h 55m

Belfast City

Mon 4/8

17:25-14:10

1 stop26h 45m

£694

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 28/7

13:05-21:15

2 stops26h 10m

Belfast City

Mon 4/8

06:30-14:56

2 stops38h 26m

£706

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Tue 3/6

10:25-21:20

2 stops28h 55m

Belfast Intl

Tue 10/6

07:45-21:45

2 stops20h 00m

£810

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 15/7

13:16-13:00

2 stops17h 44m

Belfast City

Mon 21/7

19:30-20:24

2 stops30h 54m

£825

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 27/7

21:15-18:45

2 stops15h 30m

Belfast City

Fri 1/8

10:10-19:00

2 stops14h 50m

£1,016

Flights are sorted by cheapest return flights first.

Deals found on 23/4

Showing 1-10 of 19 results
1
2

Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Illinois 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 Illinois to Belfast

Rainfall in Belfast by month

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

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast by month

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

If weather is an important factor for your trip to Belfast, 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 16.0 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 Belfast

Get insights into the airlines that provide service to Belfast. 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 Belfast. Reviews last updated 24 April 2025.
To help decide which airline to fly from Illinois to Belfast, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,920 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,272 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,068 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Belfast. 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 Illinois to Belfast one-way?

    £300 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Delta and KLM, with prices starting from £326 and £387, respectively.

  • What are the most popular routes from Illinois to Belfast?

    The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Lambert-St Louis - Belfast Intl.

  • Can I find deals for flights from Illinois to Belfast that include hotel bookings?

    Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast.

  • Can I find deals for business class flights from Illinois to Belfast?

    Yes. Cheapflights offers flight deals from Illinois to Belfast 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 Illinois to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Belfast (average of £67). Flying from Illinois to Belfast in July is currently the most expensive (average of £90). 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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Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Illinois to Belfast with no change fees?

Need flexible booking options for your flight to Belfast from Illinois? 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 Illinois to Belfast become cheaper?

Yes! Start tracking prices for Illinois to Belfast flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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