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$345+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 2, 2025.

Round-trip from

$621
(Finnair)

One-way from

$345
(Kiwi.com)

Popular in

May

Cheapest in

December

Average price

$872
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. 22% potential increase in price ($249 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($54 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 2, 2025.

This Finnair deal was found by Cheapflights users on 4/1. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/235:45 pmORD - BHD
1 stop10h 50mMultiple Airlines
Tue 10/76:35 amBHD - ORD
1 stop14h 15mMultiple Airlines
Deal found 4/1$621
This StudentUniverse deal was found by Cheapflights users on 4/1. 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 9/235:45 pmORD - BHD
1 stop10h 50mFinnair
Tue 10/74:25 pmBHD - ORD
2 stops33h 09mFinnair
Deal found 4/1$633
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2312:46 pmORD - BHD
2 stops15h 49mBritish Airways
Tue 10/79:35 amBHD - ORD
2 stops16h 00mBritish Airways
Deal found 4/1$641
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Tue 9/235:45 pmORD - BHD
1 stop10h 50mAmerican Airlines
Tue 10/79:35 amBHD - ORD
2 stops16h 00mAmerican Airlines
Deal found 4/1$667
This Mytrip deal was found by Cheapflights users on 4/1. 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 5/139:55 amORD - BFS
2 stops28h 40mMultiple Airlines
Tue 5/206:15 amBFS - ORD
3 stops46h 24mMultiple Airlines
Deal found 4/1$694
This Delta deal was found by Cheapflights users on 4/1. 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.
Fri 5/165:15 pmORD - BHD
2 stops22h 00mDelta
Fri 5/236:30 amBHD - ORD
2 stops19h 51mDelta
Deal found 4/1$972
This Delta deal was found by Cheapflights users on 4/1. 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.
Fri 5/166:38 pmMDW - BHD
2 stops20h 37mDelta
Fri 5/236:30 amBHD - MDW
2 stops18h 15mDelta
Deal found 4/1$972
This Gurufare deal was found by Cheapflights users on 4/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/147:23 amSTL - BHD
2 stops23h 32mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops29h 38mBritish Airways
Deal found 4/1$1,040
This KAYAK deal was found by Cheapflights users on 4/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1512:27 pmSTL - BHD
2 stops16h 08mMultiple Airlines
Mon 7/219:50 amBHD - STL
3 stops19h 59mMultiple Airlines
Deal found 4/1$2,106
This Cheapflightsfares deal was found by Cheapflights users on 4/2. 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.
Fri 4/119:15 pmORD - BHD
1 stop12h 15mIberia
Fri 4/186:35 amBHD - ORD
1 stop17h 40mIberia
Deal found 4/2$3,405

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 2, 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 - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/23

5:45 pm-10:35 am

1 stop10h 50m

Belfast City

Tue 10/7

6:35 am-2:50 pm

1 stop14h 15m

$621

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/23

5:45 pm-10:35 am

1 stop10h 50m

Belfast City

Tue 10/7

4:25 pm-7:34 pm

2 stops33h 09m

$633

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/23

12:46 pm-10:35 am

2 stops15h 49m

Belfast City

Tue 10/7

9:35 am-7:35 pm

2 stops16h 00m

$641

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/23

5:45 pm-10:35 am

1 stop10h 50m

Belfast City

Tue 10/7

9:35 am-7:35 pm

2 stops16h 00m

$667

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 5/13

9:55 am-8:35 pm

2 stops28h 40m

Belfast Intl

Tue 5/20

6:15 am-10:39 pm

3 stops46h 24m

$694

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 5/16

5:15 pm-9:15 pm

2 stops22h 00m

Belfast City

Fri 5/23

6:30 am-8:21 pm

2 stops19h 51m

$972

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Fri 5/16

6:38 pm-9:15 pm

2 stops20h 37m

Belfast City

Fri 5/23

6:30 am-6:45 pm

2 stops18h 15m

$972

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 7/15

4:52 pm-3:20 pm

2 stops16h 28m

Belfast City

Mon 7/21

7:30 pm-7:08 pm

2 stops29h 38m

$1,015

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 7/14

8:01 pm-5:30 pm

2 stops15h 29m

Belfast City

Mon 7/21

9:50 am-11:49 pm

3 stops19h 59m

$2,106

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 6/5

6:17 pm-11:00 am

3 stops58h 43m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 15 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 2, 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 2, 2025.
Read through reviews of airlines operating flights from Illinois to Belfast, such as Delta, Finnair 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
7,898 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

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
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

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
1,267 reviews
Delta
8.0
Very good
7,898 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

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
7,898 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

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
6,715 reviews
Delta
8.0
Very good
7,898 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

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?

    $456 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 American Airlines, with prices starting from $498 and $699, respectively.

  • 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, Chicago O'Hare Intl - Belfast City and Chicago Midway - 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 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$622Average$724FlexibilityNo cancel feeOn-time70%

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