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

Cheapflights users have booked flights from Chicago to Belfast round-trip from £516. Other airlines that can offer you cheap pricing are KLM, from £533, and Delta, from £585. British Airways is priced at 26% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Chicago to Belfast one-way?

The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £417. However, be on the lookout for offers from Aer Lingus and Delta, as they are both options that can get you from Chicago to Belfast for a low price.

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 December. Prices to Belfast from Chicago average £701. You can even find prices in December for less than £701, as users have found deals to Belfast from as low as £457. 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 62%.

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.

£363+ Flights from Chicago to Belfast

Cheap flight deals from Chicago to Belfast

Round-trip from	£509
One-way from	£363
Popular in	May
Cheapest in	December

7/4-14/4
4 total stops
35h 35m total
Chicago to Belfast

Search Deals

25/7
2 total stops
30h 50m total
Chicago to Belfast

Search Deals

Highest demand for flights based on searches. 24% potential increase in price (£176 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£35 potential savings vs. average return price).

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 21 February 2025.

Mon 7/419:30ORD - BFS

2 stops19h 25mMultiple Airlines

Mon 14/408:10BFS - ORD

2 stops16h 10mMultiple Airlines

Deal found 21/2£509

Sun 6/419:15ORD - BHD

1 stop11h 50mBritish Airways

Sun 13/406:50BHD - ORD

1 stop13h 00mBritish Airways

Deal found 20/2£516

Sun 6/418:15ORD - BHD

2 stops16h 40mKLM

Sun 13/417:25BHD - ORD

1 stop26h 45mKLM

Deal found 20/2£533

Mon 7/418:42MDW - BHD

2 stops16h 13mDelta

Mon 14/406:30BHD - MDW

2 stops17h 50mDelta

Deal found 21/2£585

Mon 7/411:30ORD - BHD

3 stops27h 20mMultiple Airlines

Mon 14/418:00BHD - ORD

2 stops27h 55mMultiple Airlines

Deal found 21/2£689

Wed 9/722:35ORD - BHD

1 stop14h 05mAmerican Airlines

Wed 23/706:50BHD - ORD

2 stops14h 55mAmerican Airlines

Deal found 20/2£741

Sat 22/312:55MDW - BFS

3 stops16h 40mMultiple Airlines

Fri 28/317:05BFS - MDW

3 stops46h 15mMultiple Airlines

Deal found 19/2£1,031

Sat 22/321:15ORD - BHD

1 stop14h 25mFinnair

Thu 27/306:35BHD - ORD

1 stop16h 05mFinnair

Deal found 20/2£1,039

Sun 23/318:42MDW - BHD

2 stops17h 08mKLM

Fri 28/306:30BHD - MDW

2 stops16h 32mKLM

Deal found 19/2£3,317

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 21 February 2025.

Mon 7/419:30ORD - BFS

2 stops19h 25mMultiple Airlines

Mon 14/408:10BFS - ORD

2 stops16h 10mMultiple Airlines

Deal found 21/2£509

Sun 6/419:15ORD - BHD

1 stop11h 50mBritish Airways

Sun 13/406:50BHD - ORD

1 stop13h 00mBritish Airways

Deal found 20/2£516

Sun 6/418:15ORD - BHD

2 stops16h 40mKLM

Sun 13/417:25BHD - ORD

1 stop26h 45mKLM

Deal found 20/2£533

Mon 7/418:42MDW - BHD

2 stops16h 13mDelta

Mon 14/406:30BHD - MDW

2 stops17h 50mDelta

Deal found 21/2£585

Wed 9/722:35ORD - BHD

1 stop14h 05mAmerican Airlines

Wed 23/706:50BHD - ORD

2 stops14h 55mAmerican Airlines

Deal found 20/2£741

Sat 22/321:15ORD - BHD

1 stop14h 25mFinnair

Thu 27/306:35BHD - ORD

1 stop16h 05mFinnair

Deal found 20/2£1,039

Mon 7/411:30ORD - BHD

3 stops27h 20mMultiple Airlines

Mon 14/418:00BHD - ORD

2 stops27h 55mMultiple Airlines

Deal found 21/2£689

Sat 22/312:55MDW - BFS

3 stops16h 40mMultiple Airlines

Fri 28/317:05BFS - MDW

3 stops46h 15mMultiple Airlines

Deal found 19/2£1,031

Sun 23/318:42MDW - BHD

2 stops17h 08mKLM

Fri 28/306:30BHD - MDW

2 stops16h 32mKLM

Deal found 19/2£3,317

Last-minute flights from Chicago to Belfast
Discover last-minute flight deals from Chicago to Belfast. Data last updated 21 February 2025 and is based on user searches.

Thu 20/312:00ORD - BHD

2 stops17h 20mBritish Airways

Thu 27/309:00BHD - ORD

2 stops20h 12mBritish Airways

Deal found 20/2£544

Sat 22/305:55ORD - BFS

3 stops28h 35mMultiple Airlines

Thu 27/307:40BFS - ORD

3 stops36h 55mMultiple Airlines

Deal found 20/2£764

Sat 22/312:55MDW - BFS

3 stops16h 40mMultiple Airlines

Fri 28/317:05BFS - MDW

3 stops46h 15mMultiple Airlines

Deal found 19/2£1,031

Sat 22/321:15ORD - BHD

1 stop14h 25mFinnair

Thu 27/306:35BHD - ORD

1 stop16h 05mFinnair

Deal found 20/2£1,039

Sat 22/321:15ORD - BHD

1 stop14h 25mAmerican Airlines

Fri 28/310:10BHD - ORD

2 stops16h 30mAmerican Airlines

Deal found 19/2£1,075

Sat 22/316:00MDW - BHD

2 stops24h 00mDelta

Thu 27/306:30BHD - MDW

2 stops16h 32mDelta

Deal found 20/2£2,255

Sun 23/313:58ORD - BHD

3 stops18h 32mMultiple Airlines

Fri 28/320:05BHD - ORD

3 stops40h 57mMultiple Airlines

Deal found 19/2£985

Sun 23/318:42MDW - BHD

2 stops17h 08mKLM

Fri 28/306:30BHD - MDW

2 stops16h 32mKLM

Deal found 19/2£3,317

One-way flights from Chicago to Belfast
Search for one-way flight options from Chicago to Belfast. Find affordable one-way fares based on user searches. Data last updated 21 February 2025.

Fri 25/718:00ORD - BFS

2 stops30h 50mMultiple Airlines

Deal found 20/2£363

Fri 25/718:00ORD - BHD

2 stops41h 10mMultiple Airlines

Deal found 20/2£411

Fri 25/712:55MDW - BHD

3 stops25h 15mMultiple Airlines

Deal found 20/2£417

Fri 25/719:15ORD - BHD

1 stop14h 15mBritish Airways

Deal found 20/2£417

Fri 25/720:50ORD - BHD

2 stops17h 35mAer Lingus

Deal found 20/2£424

Fri 25/718:50MDW - BHD

2 stops20h 25mDelta

Deal found 20/2£452

Find flights from Chicago to Belfast within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 7/4

19:30-20:55

2 stops19h 25m

Belfast Intl

Mon 14/4

08:10-18:20

2 stops16h 10m

£509

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 6/4

19:15-13:05

1 stop11h 50m

Belfast City

Sun 13/4

06:50-13:50

1 stop13h 00m

£516

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 6/4

18:15-16:55

2 stops16h 40m

Belfast City

Sun 13/4

17:25-14:10

1 stop26h 45m

£533

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 7/4

18:42-16:55

2 stops16h 13m

Belfast City

Mon 14/4

06:30-18:20

2 stops17h 50m

£585

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 7/4

11:30-20:50

3 stops27h 20m

Belfast City

Mon 14/4

18:00-15:55

2 stops27h 55m

£689

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 9/7

22:35-18:40

1 stop14h 05m

Belfast City

Wed 23/7

06:50-15:45

2 stops14h 55m

£741

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Sat 22/3

12:55-10:35

3 stops16h 40m

Belfast Intl

Fri 28/3

17:05-10:20

3 stops46h 15m

£1,031

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 22/3

21:15-16:40

1 stop14h 25m

Belfast City

Thu 27/3

06:35-17:40

1 stop16h 05m

£1,039

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Sun 23/3

18:42-16:50

2 stops17h 08m

Belfast City

Fri 28/3

06:30-18:02

2 stops16h 32m

£3,317

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 25/7

18:00-06:50

2 stops30h 50m

£363

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 15 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.

Travel insights for flights from Chicago to Belfast

Get recent, data-driven insights about flights from Chicago to Belfast including ideal travel times, pricing trends, and more.

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

Delta

8.0

Very Good

8,213 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

8,213 reviews

Delta

8.0

Very Good

8,213 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

1,331 reviews

Delta

8.0

Very Good

8,213 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

1,273 reviews

Delta

8.0

Very Good

8,213 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

8,213 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.

Aer Lingus

7.0

Good

1,070 reviews

Delta

8.0

Very Good

8,213 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 £516. Other airlines that can offer you cheap pricing are KLM, from £533, and Delta, from £585. British Airways is priced at 26% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Chicago to Belfast one-way?
The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £417. However, be on the lookout for offers from Aer Lingus and Delta, as they are both options that can get you from Chicago to Belfast for a low price.
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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Cheap flights from Chicago to Belfast from £363

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 25/7. 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

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 21 February 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 21 February 2025.

Find flights from Chicago to Belfast within your budget

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.

Travel insights for flights from Chicago to Belfast

Get recent, data-driven insights about flights from Chicago to Belfast including ideal travel times, pricing trends, and more.

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

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 cheapest airlines to fly from Chicago to Belfast one-way?

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 21 February 2025.