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Cheap flights from Ireland to Chicago O'Hare Intl Airport from £378

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 29/8. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
1 Aug — 8 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to O'Hare Intl
Explore the most affordable flight options available from Ireland to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2026.

Thu 8/1010:00
DUB
-
ORD
1 stop12h 40m
Delta
Tue 13/1017:10
ORD
-
DUB
1 stop19h 15m
Delta
Deal found 28/6£461
Mon 7/909:30
DUB
-
ORD
Nonstop8h 00m
British Airways
Sun 13/921:15
ORD
-
DUB
1 stop13h 05m
British Airways
Deal found 30/6£462
Sat 26/920:15
DUB
-
ORD
1 stop22h 10m
British Airways
Sat 17/1013:31
ORD
-
DUB
2 stops14h 09m
British Airways
Deal found 30/6£462
Wed 7/1010:00
DUB
-
ORD
1 stop17h 32m
Delta
Mon 12/1015:39
ORD
-
DUB
1 stop10h 16m
Delta
Deal found 27/6£463
Wed 29/711:30
DUB
-
ORD
1 stop12h 04m
JetBlue
Tue 18/809:35
ORD
-
DUB
1 stop17h 25m
JetBlue
Deal found 1/7£465
Sat 15/811:30
DUB
-
ORD
1 stop27h 22m
JetBlue
Sat 22/813:55
ORD
-
DUB
1 stop12h 25m
JetBlue
Deal found 1/7£465
Thu 24/910:30
DUB
-
ORD
2 stops19h 06m
British Airways
Wed 14/1013:31
ORD
-
DUB
2 stops14h 09m
British Airways
Deal found 30/6£466
Sun 16/810:40
DUB
-
ORD
1 stop29h 31m
JetBlue
Sun 23/806:00
ORD
-
DUB
1 stop21h 00m
JetBlue
Deal found 30/6£469
Wed 2/909:30
DUB
-
ORD
Nonstop8h 00m
Finnair
Wed 9/912:09
ORD
-
DUB
1 stop15h 36m
Finnair
Deal found 2/7£470
Fri 14/811:30
DUB
-
ORD
1 stop16h 28m
JetBlue
Sat 22/813:55
ORD
-
DUB
1 stop12h 25m
JetBlue
Deal found 30/6£471
Mon 24/809:40
DUB
-
ORD
3 stops30h 36m
Multiple Airlines
Fri 28/809:50
ORD
-
DUB
2 stops16h 30m
Multiple Airlines
Deal found 29/6£472

Find flight deals from Ireland to O'Hare Intl

Keep the following information in mind while searching for Ireland to O'Hare Intl flight deals. Data was last updated 2 July 2026.

Round-trip from

£461

One-way from

£378

Popular in

August

Cheapest in

November

Average price

£623

Good round-trip deal

£584 or less

Good one-way deal

£696 or less
Delta
  • Delta
  • 8/10-13/10
  • 2 total stops
  • 31h 55m total
  • Ireland to Chicago
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 29/8
  • 1 total stop
  • 16h 35m total
  • Ireland to Chicago
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ireland to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Ireland to Chicago O'Hare Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to O'Hare Intl 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 858,174 searches. Data last updated 2 July 2026.
Use the filters below to find and compare flights from Ireland to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 16/7

10:40-19:15

1 stop14h 35m

Chicago O'Hare Intl

Wed 22/7

10:56-08:20

1 stop15h 24m

£475

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 17/7

11:30-21:58

1 stop16h 28m

Chicago O'Hare Intl

Thu 23/7

09:40-09:00

1 stop17h 20m

£475

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 27/8

11:10-16:10

2 stops35h 00m

Chicago O'Hare Intl

Mon 31/8

19:15-10:10

2 stops32h 55m

£489

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 15/7

11:30-21:58

1 stop16h 28m

Chicago O'Hare Intl

Mon 27/7

10:56-08:20

1 stop15h 24m

£492

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 13/8

11:30-21:58

1 stop16h 28m

Chicago O'Hare Intl

Sat 22/8

13:55-08:20

1 stop12h 25m

£492

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 26/8

10:40-19:27

1 stop14h 47m

Chicago O'Hare Intl

Sat 29/8

13:55-08:20

1 stop12h 25m

£497

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 23/9

11:40-16:10

2 stops34h 30m

Chicago O'Hare Intl

Fri 2/10

19:15-09:15

2 stops32h 00m

£511

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 3/8

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Mon 10/8

21:15-19:35

1 stop16h 20m

£550
Fastest return journey

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 3/8

09:30-11:30

Nonstop8h 00m

Chicago O'Hare Intl

Mon 10/8

22:20-11:50

Nonstop7h 30m

£551

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 3/8

14:15-21:25

1 stop13h 10m

Chicago O'Hare Intl

Mon 10/8

19:25-13:15

1 stop11h 50m

£575

Flights are sorted by cheapest return flights first.

Deals found on 28/6

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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

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

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

Currently, March is the cheapest month in which you can book a flight from Ireland to Chicago O'Hare Intl Airport (average of £302). Flying from Ireland to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £481). 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 is the cheapest time of day to fly from IE to ORD?

Find hourly flight availability from Ireland to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 July 2026.

When flying from Ireland to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Ireland to Chicago O'Hare Intl Airport

Explore weekly flight availability from Ireland to O'Hare Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 2 July 2026.

The most flights from IE0 to ORD are scheduled on a Monday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).

How often are flights from Ireland to Chicago delayed?

About 14% of weekly flights between Ireland and Chicago have experienced delays in the past year, with the average delay time being 145 minutes.

What is the most punctual flight time for Ireland to Chicago flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Chicago flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 8% of flights being delayed.

How far ahead should I book a flight from Ireland to Chicago O'Hare Intl Airport?

The best time to book flights from Ireland to Chicago O'Hare Intl Airport is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 2 July 2026.
Read reviews from past customers who have flown with Finnair,United Airlines, andAer Lingus from Ireland to Chicago O'Hare Intl Airport. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Finnair
7.6
Good
1,415 reviews
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
United Airlines
7.4
Good
9,920 reviews
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Aer Lingus
7.3
Good
1,634 reviews
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Icelandair
7.0
Good
694 reviews
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
Lufthansa
6.8
Okay
8,107 reviews
Finnair
7.6
Good
1,415 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.7

Overall

7.6

Crew

8.2

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Jake,Jun 2026

RNO - SEA

Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.

Related info for your journey

Find useful and relevant information for your journey from 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.

  • How long is the flight from Ireland to Chicago O'Hare Intl Airport?

    There are many flights that can get you from Ireland to Chicago O'Hare Intl Airport in 8h. Fly via JetBlue, Scandinavian Airlines, or British Airways to get the fastest option. The distance between Ireland and Chicago O'Hare Intl Airport is about 3661 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Ireland to Chicago O'Hare Intl Airport?

    Consider American Airlines (84%), Aer Lingus (84%) or British Airways (84%) when booking your flight. These represent the most reliable airlines when flying from Ireland to Chicago O'Hare Intl Airport.

  • What are the cheapest flights from Ireland to Chicago O'Hare Intl Airport?

    On average you can expect to pay £1,154 for a flight from Ireland to Chicago O'Hare Intl Airport. The cheapest flight overall is £547 while the most popular route, (Dublin - Chicago O'Hare Intl) is currently priced at £382.

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

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

  • How can I find direct flights from 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 Ireland to O'Hare Intl.

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

    Yes. Cheapflights offers flight deals from 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 Ireland to Chicago O'Hare Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Ireland to Chicago O'Hare Intl Airport (average of £302). Flying from Ireland to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £481). 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

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

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village

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Top 5 airlines flying from Ireland to O'Hare Intl

Discover the top 5 airlines that operate flights from Ireland to O'Hare Intl. 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 858,174 searches. Data last updated 2 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£302Average£481FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£336Average£657FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£349Average£548FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£359Average£652FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£463Average£671FlexibilityNo cancel feeOn-time76%
Search Finnair flights

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 Ireland to O'Hare Intl?

When you search for this flight from Ireland to O'Hare Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ireland to O'Hare Intl?

Cheapflights simply makes it quick and affordable to book flights from Ireland to O'Hare Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ireland to O'Hare Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ireland to O'Hare Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ireland to O'Hare Intl become cheaper?

Yes! Start tracking prices for Ireland to O'Hare Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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