What are the cheapest airlines flying from Chicago to Belfast round-trip?

Cheapflights users have booked flights from Chicago to Belfast round-trip from £502. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £506, and American Airlines, from £510. Finnair is priced at 29% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest month to book a flight from Chicago to Belfast?

Currently, January is the cheapest month in which you can book a flight from Chicago to Belfast (average of £67). Flying from Chicago 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.

What are the most popular routes from Chicago to Belfast?

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

What is the cheapest month to fly from Chicago to Belfast?

The best pricing can be found in the month of September. Prices to Belfast from Chicago average £709. You can even find prices in September for less than £709, as users have found deals to Belfast from as low as £434. The month of May appears to be one of the more expensive times to travel to Belfast from Chicago. Flying in the targeted month can save you up to 50%.

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

When flying from Chicago 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.

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

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

How can I find direct flights from Chicago to Belfast?

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

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

Yes. Cheapflights offers flight deals from Chicago 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.

£322+ Flights from Chicago to Belfast

Cheap flight deals from Chicago to Belfast

Round-trip from	£502
One-way from	£322
Popular in	May
Cheapest in	September
Average price	£1,013

Finnair
9/9-23/9
2 total stops
35h 20m total
Chicago to Belfast

Search Deals

British Airways
20/8
1 total stop
13h 00m total
Chicago to Belfast

Search Deals

Highest demand for flights based on searches. 26% potential increase in price (£192 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 Chicago to Belfast

Cheapest flights from Chicago to Belfast
Explore the most affordable flight options available from Chicago to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Tue 9/917:45ORD - BHD

1 stop10h 50mFinnair

Tue 23/920:20BHD - ORD

1 stop24h 30mFinnair

Deal found 17/4£502

Tue 13/516:20ORD - BHD

1 stop22h 45mVirgin Atlantic

Tue 20/517:25BHD - ORD

1 stop27h 15mVirgin Atlantic

Deal found 17/4£506

Tue 9/919:10ORD - BHD

1 stop14h 10mAmerican Airlines

Tue 23/909:35BHD - ORD

2 stops17h 50mAmerican Airlines

Deal found 17/4£510

Sun 27/421:15ORD - BHD

1 stop11h 25mBritish Airways

Tue 13/509:35BHD - ORD

1 stop14h 40mBritish Airways

Deal found 17/4£512

Mon 24/1116:25ORD - BHD

1 stop22h 35mDelta

Tue 2/1217:20BHD - ORD

1 stop27h 10mDelta

Deal found 17/4£529

Tue 13/518:25MDW - BHD

2 stops20h 40mDelta

Tue 20/506:30BHD - MDW

2 stops20h 57mDelta

Deal found 17/4£547

Sun 1/616:43ORD - BHD

2 stops22h 27mMultiple Airlines

Sun 8/607:05BHD - ORD

2 stops34h 31mMultiple Airlines

Deal found 16/4£604

Sun 1/616:43ORD - BFS

2 stops17h 12mMultiple Airlines

Sun 8/609:55BFS - ORD

2 stops40h 08mMultiple Airlines

Deal found 16/4£609

Sat 16/817:20ORD - BHD

2 stops17h 35mKLM

Sun 24/806:30BHD - ORD

1 stop13h 40mKLM

Deal found 17/4£698

Sun 23/1119:40ORD - BHD

2 stops15h 40mAer Lingus

Mon 1/1218:00BHD - ORD

2 stops26h 00mAer Lingus

Deal found 17/4£751

Fri 11/717:59MDW - BHD

2 stops16h 56mKLM

Sat 19/706:30BHD - MDW

2 stops17h 33mKLM

Deal found 17/4£2,174

Best flights from Chicago to Belfast
Discover carefully curated flight deals from Chicago to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 April 2025.

Tue 9/917:45ORD - BHD

1 stop10h 50mFinnair

Tue 23/920:20BHD - ORD

1 stop24h 30mFinnair

Deal found 17/4£502

Tue 13/516:20ORD - BHD

1 stop22h 45mVirgin Atlantic

Tue 20/517:25BHD - ORD

1 stop27h 15mVirgin Atlantic

Deal found 17/4£506

Tue 9/919:10ORD - BHD

1 stop14h 10mAmerican Airlines

Tue 23/909:35BHD - ORD

2 stops17h 50mAmerican Airlines

Deal found 17/4£510

Sun 27/421:15ORD - BHD

1 stop11h 25mBritish Airways

Tue 13/509:35BHD - ORD

1 stop14h 40mBritish Airways

Deal found 17/4£512

Sun 27/410:50ORD - BHD

2 stops24h 05mDelta

Tue 13/506:30BHD - ORD

2 stops16h 00mDelta

Deal found 17/4£547

Sun 1/616:43ORD - BHD

2 stops22h 27mMultiple Airlines

Sun 8/607:05BHD - ORD

2 stops34h 31mMultiple Airlines

Deal found 16/4£604

Sat 16/817:20ORD - BHD

2 stops17h 35mKLM

Sun 24/806:30BHD - ORD

1 stop13h 40mKLM

Deal found 17/4£698

Sun 13/715:45ORD - BHD

2 stops15h 05mAer Lingus

Sat 19/718:45BHD - ORD

2 stops30h 15mAer Lingus

Deal found 17/4£985

Tue 13/518:25MDW - BHD

2 stops20h 40mDelta

Tue 20/506:30BHD - MDW

2 stops20h 57mDelta

Deal found 17/4£547

Sun 1/616:43ORD - BFS

2 stops17h 12mMultiple Airlines

Sun 8/609:55BFS - ORD

2 stops40h 08mMultiple Airlines

Deal found 16/4£609

Fri 11/717:59MDW - BHD

2 stops16h 56mKLM

Sat 19/706:30BHD - MDW

2 stops17h 33mKLM

Deal found 17/4£2,174

Last-minute flights from Chicago to Belfast
Discover last-minute flight deals from Chicago to Belfast. Data last updated 18 April 2025 and is based on user searches.

Sun 27/421:15ORD - BHD

1 stop11h 25mBritish Airways

Tue 13/509:35BHD - ORD

1 stop14h 40mBritish Airways

Deal found 17/4£512

Sun 27/422:20ORD - BHD

1 stop16h 25mAmerican Airlines

Tue 13/506:35BHD - ORD

1 stop13h 15mAmerican Airlines

Deal found 17/4£516

Sun 27/410:50ORD - BHD

2 stops24h 05mDelta

Tue 13/506:30BHD - ORD

2 stops16h 00mDelta

Deal found 17/4£547

Thu 1/519:25ORD - BFS

2 stops21h 45mMultiple Airlines

Sun 4/514:55BFS - ORD

2 stops44h 50mMultiple Airlines

Deal found 18/4£694

Tue 13/516:20ORD - BHD

1 stop22h 45mVirgin Atlantic

Tue 20/517:25BHD - ORD

1 stop27h 15mVirgin Atlantic

Deal found 17/4£506

Tue 13/518:25MDW - BHD

2 stops20h 40mDelta

Tue 20/506:30BHD - MDW

2 stops20h 57mDelta

Deal found 17/4£547

Tue 13/509:55ORD - BHD

2 stops21h 50mMultiple Airlines

Tue 20/514:20BHD - ORD

3 stops45h 05mMultiple Airlines

Deal found 17/4£668

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/9

17:45-10:35

1 stop10h 50m

Belfast City

Tue 23/9

20:20-14:50

1 stop24h 30m

£502

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 13/5

16:20-21:05

1 stop22h 45m

Belfast City

Tue 20/5

17:25-14:40

1 stop27h 15m

£506

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 9/9

19:10-15:20

1 stop14h 10m

Belfast City

Tue 23/9

09:35-21:25

2 stops17h 50m

£510

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 27/4

21:15-14:40

1 stop11h 25m

Belfast City

Tue 13/5

09:35-18:15

1 stop14h 40m

£512

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 27/4

10:50-16:55

2 stops24h 05m

Belfast City

Tue 13/5

06:30-16:30

2 stops16h 00m

£547

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Tue 13/5

18:25-21:05

2 stops20h 40m

Belfast City

Tue 20/5

06:30-21:27

2 stops20h 57m

£547

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 1/6

16:43-21:10

2 stops22h 27m

Belfast City

Sun 8/6

07:05-11:36

2 stops34h 31m

£604

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 1/6

16:43-15:55

2 stops17h 12m

Belfast Intl

Sun 8/6

09:55-20:03

2 stops40h 08m

£609

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 16/8

17:20-16:55

2 stops17h 35m

Belfast City

Sun 24/8

06:30-14:10

1 stop13h 40m

£698

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 13/7

15:45-12:50

2 stops15h 05m

Belfast City

Sat 19/7

18:45-19:00

2 stops30h 15m

£985

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 13 results

Best time to book a flight from Chicago to Belfast

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

Rainfall in Belfast 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

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

To help decide which airline to fly from Chicago 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

7,917 reviews

Check prices

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

7,917 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

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

1,329 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

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

1,269 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

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

642 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

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

7,917 reviews

Check prices

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

What are the cheapest airlines flying from Chicago to Belfast round-trip?
Cheapflights users have booked flights from Chicago to Belfast round-trip from £502. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £506, and American Airlines, from £510. Finnair is priced at 29% lower than the current average price of a flight leaving 3 months from now.
What are the most popular routes from Chicago to Belfast?
The most popular route from Chicago to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Chicago Midway - Belfast Intl.
Can I find deals for flights from Chicago to Belfast that include hotel bookings?
Yes. In addition to deals on Chicago to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Chicago to Belfast?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Belfast.
Can I find deals for business class flights from Chicago to Belfast?
Yes. Cheapflights offers flight deals from Chicago 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 Chicago to Belfast?
Currently, January is the cheapest month in which you can book a flight from Chicago to Belfast (average of £67). Flying from Chicago 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

Alternative routes for Chicago to Belfast

O'Hare Intl to Belfast Intl flights

Fly with Cheapflights

How does Cheapflights help users find flights from Chicago to Belfast?

Cheapflights helps you search for flights from Chicago to Belfast via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Chicago to Belfast?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Belfast for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Belfast from Chicago shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Chicago to Belfast become cheaper?

Not ready to book yet? You can track prices for flights from Chicago to Belfast on Cheapflights with our Price Alert feature and get notified when better prices are available.

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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.

Cheap flights from Chicago to Belfast from £322

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 20/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Chicago to Belfast

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Chicago to Belfast

Cheapest flights from Chicago to BelfastExplore the most affordable flight options available from Chicago to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Explore the most affordable flight options available from Chicago to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago to Belfast that are best for you.

Best time to book a flight from Chicago to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Belfast

Rainfall in Belfast by month

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

Temperature in Belfast by month

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

Reviews of airlines servicing Belfast

To help decide which airline to fly from Chicago 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.

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 flying from Chicago to Belfast round-trip?

What are the most popular routes from Chicago to Belfast?

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

How can I find direct flights from Chicago to Belfast?

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

What is the cheapest month to book a flight from Chicago to Belfast?

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 Chicago to Belfast

See prices for flight routes from nearby airports that may be better suited for you.

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 Chicago to Belfast?

Why should you use Cheapflights to find cheap flight tickets from Chicago to Belfast?

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

Can Cheapflights notify me if prices for flights from Chicago to Belfast become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Chicago to Belfast
Explore the most affordable flight options available from Chicago to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.