What is the cheapest month to book a flight from Northern Ireland to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Northern Ireland to Chicago O'Hare Intl Airport (average of $245). Flying from Northern Ireland to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 1.7 in.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest month to fly from Northern Ireland to Chicago O'Hare Intl Airport?

September can be a great time to fly to Chicago O'Hare Intl Airport from Northern Ireland with a flight ticket averaging about $913. Cheapflights users have found deals in the month of September for as cheap as $629. The most expensive prices can be found in the month of August.

What is the cheapest time of day to fly from NIR to ORD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Chicago O'Hare Intl Airport as you normally would.

Can I find deals for flights from Northern Ireland to O'Hare Intl that include hotel bookings?

Yes. In addition to deals on Northern Ireland to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Northern Ireland to O'Hare Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to O'Hare Intl.

Can I find deals for business class flights from Northern Ireland to O'Hare Intl?

Yes. Cheapflights offers flight deals from Northern Ireland to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$681+ Flights from Northern Ireland to Chicago O'Hare Intl Airport

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1. Tell us where you want to go

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Cheap flight deals from Northern Ireland to O'Hare Intl

Round-trip from	$692 (Trip.com)
One-way from	$681 (Kiwi.com)
Popular in	August
Cheapest in	September
Average price	$1,197

From Northern Ireland to Chicago O'Hare Intl

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One-way flight from Northern Ireland to Chicago O'Hare Intl

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High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Northern Ireland to O'Hare Intl

Cheapest flights from Northern Ireland to O'Hare Intl
Explore the most affordable flight options available from Northern Ireland to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

Tue 10/77:00 amBFS - ORD

2 stops44h 15mMultiple Airlines

Sat 10/117:25 pmORD - BFS

2 stops20h 05mMultiple Airlines

Deal found 7/30

$692

Tue 10/76:30 amBHD - ORD

2 stops17h 40mVirgin Atlantic

Sat 10/116:21 pmORD - BHD

2 stops40h 34mVirgin Atlantic

Deal found 7/30

$839

Tue 10/77:05 amBHD - ORD

3 stops18h 24mMultiple Airlines

Sat 10/113:50 pmORD - BHD

2 stops23h 20mMultiple Airlines

Deal found 7/30

$948

Tue 10/78:20 pmBHD - ORD

1 stop24h 20mFinnair

Sat 10/114:50 pmORD - BHD

2 stops36h 40mFinnair

Deal found 7/30

$973

Best flights from Northern Ireland to O'Hare Intl
Discover carefully curated flight deals from Northern Ireland to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2025.

Tue 10/77:00 amBFS - ORD

2 stops44h 15mMultiple Airlines

Sat 10/117:25 pmORD - BFS

2 stops20h 05mMultiple Airlines

Deal found 7/30

$692

Tue 10/76:30 amBHD - ORD

2 stops17h 40mVirgin Atlantic

Sat 10/116:21 pmORD - BHD

2 stops40h 34mVirgin Atlantic

Deal found 7/30

$839

Tue 10/78:20 pmBHD - ORD

1 stop24h 20mFinnair

Sat 10/114:50 pmORD - BHD

2 stops36h 40mFinnair

Deal found 7/30

$973

Tue 10/77:05 amBHD - ORD

3 stops18h 24mMultiple Airlines

Sat 10/113:50 pmORD - BHD

2 stops23h 20mMultiple Airlines

Deal found 7/30

$948

One-way flights from Northern Ireland to O'Hare Intl
Search for one-way flight options from Northern Ireland to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated August 1, 2025.

Sun 12/216:00 amBFS - ORD

2 stops17h 20mMultiple Airlines

Deal found 7/29

$681

Sun 12/217:30 amBHD - ORD

2 stops15h 50mMultiple Airlines

Deal found 7/29

$802

Sun 8/106:50 amBHD - ORD

1 stop13h 00mBritish Airways

Deal found 7/31

$3,001

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 10/7

7:00 am-9:15 pm

2 stops44h 15m

Chicago O'Hare Intl

Sat 10/11

7:25 pm-9:30 pm

2 stops20h 05m

$692

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 10/7

6:30 am-6:10 pm

2 stops17h 40m

Chicago O'Hare Intl

Sat 10/11

6:21 pm-4:55 pm

2 stops40h 34m

$839

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 10/7

7:05 am-7:29 pm

3 stops18h 24m

Chicago O'Hare Intl

Sat 10/11

3:50 pm-9:10 pm

2 stops23h 20m

$948

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 10/7

8:20 pm-2:40 pm

1 stop24h 20m

Chicago O'Hare Intl

Sat 10/11

4:50 pm-11:30 am

2 stops36h 40m

$973

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 12/21

6:00 am-5:20 pm

2 stops17h 20m

$681

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 12/21

7:30 am-5:20 pm

2 stops15h 50m

$802

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 8/10

6:50 am-1:50 pm

1 stop13h 00m

$3,001

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Northern Ireland to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Northern Ireland 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 Northern Ireland to Chicago O'Hare Intl Airport

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing O'Hare Intl

See what other customers who have flown with Finnair, Virgin Atlantic, and British Airways from Northern Ireland to Chicago O'Hare Intl Airport have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,316 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,316 reviews

Finnair

7.6

Good

1,316 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Virgin Atlantic

7.4

Good

655 reviews

Finnair

7.6

Good

1,316 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.6

Okay

7,222 reviews

Finnair

7.6

Good

1,316 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

Can I find deals for flights from Northern Ireland to O'Hare Intl that include hotel bookings?
Yes. In addition to deals on Northern Ireland to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Northern Ireland to O'Hare Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to O'Hare Intl.
Can I find deals for business class flights from Northern Ireland to O'Hare Intl?
Yes. Cheapflights offers flight deals from Northern Ireland to O'Hare Intl 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 Northern Ireland to Chicago O'Hare Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Northern Ireland to Chicago O'Hare Intl Airport (average of $245). Flying from Northern Ireland to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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.

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$681+ Cheap flights from Northern Ireland to O'Hare Intl (ORD)

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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Northern Ireland to O'Hare Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Northern Ireland to O'Hare Intl

Keep the following information in mind while searching for Northern Ireland to O'Hare Intl flight deals. Data was last updated August 1, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Northern Ireland to O'Hare Intl

Cheapest flights from Northern Ireland to O'Hare IntlExplore the most affordable flight options available from Northern Ireland to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

Explore the most affordable flight options available from Northern Ireland to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Chicago O'Hare Intl Airport that are best for you.

Best time to book a flight from Northern Ireland to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Northern Ireland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Northern Ireland to Chicago O'Hare Intl Airport

Reviews of airlines servicing O'Hare Intl

See what other customers who have flown with Finnair, Virgin Atlantic, and British Airways from Northern Ireland to Chicago O'Hare Intl Airport have to say. You can also see how each airline stacks up 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 Northern Ireland to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Northern Ireland to O'Hare Intl that include hotel bookings?

How can I find direct flights from Northern Ireland to O'Hare Intl?

Can I find deals for business class flights from Northern Ireland to O'Hare Intl?

What is the cheapest month to book a flight from Northern Ireland to Chicago O'Hare Intl Airport?

Traveling to a place near Chicago O'Hare Intl Airport?

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 Northern Ireland to O'Hare Intl

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

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Cheapest flights from Northern Ireland to O'Hare Intl
Explore the most affordable flight options available from Northern Ireland to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.