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$335+ Cheap flights from Illinois to Belfast

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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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 April 24, 2025.

Round-trip from

$686
(Mytrip)

One-way from

$348
(Mytrip)

Popular in

May

Cheapest in

September

Average price

$1,341
From Illinois to Belfast
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One-way flight from Illinois to Belfast
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Highest demand for flights based on searches. 26% potential increase in price ($339 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 24, 2025.

This Mytrip deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/34:43 pmORD - BFS
2 stops17h 57mMultiple Airlines
Tue 6/106:15 amBFS - ORD
2 stops43h 48mMultiple Airlines
Deal found 4/23$674
This American Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:45 pmORD - BHD
1 stop13h 10mAmerican Airlines
Tue 5/136:35 amBHD - ORD
1 stop14h 05mAmerican Airlines
Deal found 4/23$675
This KLM deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/276:15 pmORD - BHD
2 stops16h 40mKLM
Tue 5/135:25 pmBHD - ORD
1 stop27h 15mKLM
Deal found 4/22$712
This Cheapflightsfares deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:15 pmORD - BHD
1 stop14h 20mBritish Airways
Sun 8/246:50 amBHD - ORD
1 stop13h 00mBritish Airways
Deal found 4/22$716
This Mytrip deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/57:25 pmORD - BHD
2 stops19h 25mMultiple Airlines
Thu 5/88:15 pmBHD - ORD
2 stops33h 14mMultiple Airlines
Deal found 4/23$842
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/274:20 pmORD - BHD
1 stop22h 55mDelta
Mon 8/45:25 pmBHD - ORD
1 stop26h 45mDelta
Deal found 4/22$923
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/281:05 pmMDW - BHD
2 stops26h 10mDelta
Mon 8/46:30 amBHD - MDW
2 stops38h 26mDelta
Deal found 4/22$938
This Orbitz deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:23 amSTL - BHD
2 stops21h 12mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops30h 54mBritish Airways
Deal found 4/24$1,099
This Mytrip deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/69:40 amMDW - BFS
3 stops28h 55mMultiple Airlines
Fri 5/97:35 amBFS - MDW
3 stops40h 12mMultiple Airlines
Deal found 4/23$1,298
This SmartFares deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/279:15 pmORD - BHD
2 stops15h 30mAer Lingus
Fri 8/110:10 amBHD - ORD
2 stops14h 50mAer Lingus
Deal found 4/22$1,350
This KLM deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/66:31 pmMDW - BHD
2 stops16h 24mKLM
Fri 6/136:30 amBHD - MDW
2 stops17h 10mKLM
Deal found 4/22$1,501
This StudentUniverse deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:23 amSTL - BHD
3 stops23h 27mAer Lingus
Mon 7/217:00 amBHD - STL
3 stops30h 56mAer Lingus
Deal found 4/23$1,604

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated April 24, 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 6/3

4:43 pm-4:40 pm

2 stops17h 57m

Belfast Intl

Tue 6/10

6:15 am-8:03 pm

2 stops43h 48m

$674

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 8/13

7:15 pm-3:35 pm

1 stop14h 20m

Belfast City

Sun 8/24

6:50 am-1:50 pm

1 stop13h 00m

$716

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 8/13

9:15 pm-3:35 pm

1 stop12h 20m

Belfast City

Sun 8/24

11:00 am-6:15 pm

1 stop13h 15m

$717

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 5/5

7:25 pm-8:50 pm

2 stops19h 25m

Belfast City

Thu 5/8

8:15 pm-11:29 pm

2 stops33h 14m

$842

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 7/27

4:20 pm-9:15 pm

1 stop22h 55m

Belfast City

Mon 8/4

5:25 pm-2:10 pm

1 stop26h 45m

$923

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 7/28

1:05 pm-9:15 pm

2 stops26h 10m

Belfast City

Mon 8/4

6:30 am-2:56 pm

2 stops38h 26m

$938

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

7:23 am-10:35 am

2 stops21h 12m

Belfast City

Mon 7/21

7:30 pm-8:24 pm

2 stops30h 54m

$1,099

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Tue 5/6

9:40 am-8:35 pm

3 stops28h 55m

Belfast Intl

Fri 5/9

7:35 am-5:47 pm

3 stops40h 12m

$1,298

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 7/27

9:15 pm-6:45 pm

2 stops15h 30m

Belfast City

Fri 8/1

10:10 am-7:00 pm

2 stops14h 50m

$1,350

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 7/28

5:45 pm-4:55 pm

2 stops17h 10m

Belfast City

Fri 8/1

6:30 am-2:10 pm

1 stop13h 40m

$1,402

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 17 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 round-trip 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

What is the cheapest time of day to fly from IL to BFS?

Find hourly flight availability from Illinois to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

When flying from Illinois to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 April 24, 2025.
Read through reviews of airlines operating flights from Illinois to Belfast, such as Delta, KLM and American Airlines. 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

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
British Airways
6.6
Okay
6,799 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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 most popular routes from Illinois to Belfast?

    The most popular flight routes from Illinois to Belfast are Chicago O'Hare Intl - Belfast Intl, Lambert-St Louis - Belfast Intl and Lambert-St Louis - Belfast City.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from Illinois to Belfast (average of $657). Flying from Illinois to Belfast in June is currently the most expensive (average of $1,189). 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

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Alternative routes for Illinois to Belfast

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Top airline flying from Illinois to Belfast

Discover the top airline that operate flights from Illinois to Belfast. 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 2,558,603 searches. Data last updated April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$622Average$724FlexibilityNo cancel feeOn-time70%

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