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$263+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$587
(Expedia)

One-way from

$263
(Trip.com)

Popular in

May

Cheapest in

September

Average price

$1,415
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 May 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 May 1, 2025.

This Expedia deal was found by Cheapflights users on 4/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:35 pmORD - BHD
1 stop14h 05mIberia
Wed 10/156:50 amBHD - ORD
1 stop16h 10mIberia
Deal found 4/30$587
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 10/89:15 pmORD - BHD
1 stop12h 20mAmerican Airlines
Thu 10/166:35 amBHD - ORD
2 stops17h 20mAmerican Airlines
Deal found 4/30$597
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/78:30 pmORD - BHD
1 stop11h 00mBritish Airways
Tue 5/139:35 amBHD - ORD
1 stop14h 40mBritish Airways
Deal found 4/30$599
This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 5/65:05 pmORD - BHD
2 stops22h 00mDelta
Tue 5/136:30 amBHD - ORD
2 stops16h 59mDelta
Deal found 4/29$726
This Mytrip deal was found by Cheapflights users on 4/30. 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.
Sat 6/1410:00 amORD - BFS
3 stops19h 00mMultiple Airlines
Mon 6/166:10 amBFS - ORD
2 stops21h 46mMultiple Airlines
Deal found 4/30$802
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 4/303:45 pmORD - BHD
2 stops14h 55mAer Lingus
Sat 5/109:50 amBHD - ORD
2 stops15h 10mAer Lingus
Deal found 4/30$956
This Mytrip deal was found by Cheapflights users on 4/30. 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.
Sat 6/1410:00 amORD - BHD
3 stops29h 10mMultiple Airlines
Sat 6/216:55 amBHD - ORD
3 stops32h 14mMultiple Airlines
Deal found 4/30$976
This KLM deal was found by Cheapflights users on 4/30. 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.
Wed 4/306:10 pmORD - BHD
2 stops21h 05mKLM
Sat 5/106:30 amBHD - ORD
2 stops16h 59mKLM
Deal found 4/30$998
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1210:26 amMDW - BFS
2 stops23h 19mMultiple Airlines
Thu 6/198:10 amBFS - MDW
2 stops19h 35mMultiple Airlines
Deal found 4/29$1,008
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 8/131:00 pmMDW - BHD
2 stops21h 55mDelta
Sun 8/246:30 amBHD - MDW
2 stops17h 58mDelta
Deal found 4/30$1,038
This Travelocity deal was found by Cheapflights users on 4/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/146:00 amSTL - BHD
2 stops24h 55mBritish Airways
Mon 7/217:30 pmBHD - STL
2 stops30h 54mBritish Airways
Deal found 4/30$1,079
This Mytrip deal was found by Cheapflights users on 4/30. 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.
Sat 6/149:40 amMDW - BHD
3 stops22h 05mMultiple Airlines
Sat 6/217:00 amBHD - MDW
3 stops31h 45mMultiple Airlines
Deal found 4/30$1,203

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 May 1, 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

Wed 10/8

10:35 pm-6:40 pm

1 stop14h 05m

Belfast City

Wed 10/15

6:50 am-5:00 pm

1 stop16h 10m

$587

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 10/8

9:15 pm-3:35 pm

1 stop12h 20m

Belfast City

Thu 10/16

6:35 am-5:55 pm

2 stops17h 20m

$597

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 10/8

5:00 pm-1:30 pm

2 stops14h 30m

Belfast City

Wed 10/15

6:50 am-7:45 pm

2 stops18h 55m

$602

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 6/14

10:00 am-11:00 am

3 stops19h 00m

Belfast Intl

Mon 6/16

6:10 am-9:56 pm

2 stops21h 46m

$802

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 6/14

10:00 am-9:10 pm

3 stops29h 10m

Belfast City

Sat 6/21

6:55 am-9:09 am

3 stops32h 14m

$976

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Thu 6/12

10:26 am-3:45 pm

2 stops23h 19m

Belfast Intl

Thu 6/19

8:10 am-9:45 pm

2 stops19h 35m

$1,008

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Wed 8/13

1:00 pm-4:55 pm

2 stops21h 55m

Belfast City

Sun 8/24

6:30 am-6:28 pm

2 stops17h 58m

$1,038

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 7/14

6:00 am-12:55 pm

2 stops24h 55m

Belfast City

Mon 7/21

7:30 pm-8:24 pm

2 stops30h 54m

$1,079

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Sat 6/14

9:40 am-1:45 pm

3 stops22h 05m

Belfast City

Sat 6/21

7:00 am-8:45 am

3 stops31h 45m

$1,203

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 6/14

5:39 pm-4:55 pm

2 stops17h 16m

Belfast City

Sat 6/21

6:30 am-5:46 pm

2 stops17h 16m

$1,287

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 22 results
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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 May 1, 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 May 1, 2025.
Read through reviews of airlines operating flights from Illinois to Belfast, such as Delta, KLM and Virgin Atlantic. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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.
Virgin Atlantic
7.4
Good
643 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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
1,076 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

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?

    $360 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on British Airways and Delta, with prices starting from $365 and $433, 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 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 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$622Average$724FlexibilityNo cancel feeOn-time70%

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