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Cheap flights from Ireland to Chicago from £331

DUB — CHI
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Chicago

Wed 2/1211:30 -
1 stop11h 50m
Mon 7/1218:30 -
1 stop9h 45m
Deal found 9/11£417
Fri 4/1211:30 -
1 stop11h 50m
Mon 14/1218:30 -
1 stop9h 45m
Deal found 7/11£418
Wed 16/1211:30 -
1 stop11h 50m
Tue 12/118:30 -
1 stop9h 45m
Deal found 7/11£432
Wed 16/1211:30 -
1 stop11h 50m
Sun 10/118:30 -
1 stop9h 45m
Deal found 7/11£440
Wed 16/1211:30 -
1 stop11h 50m
Thu 7/118:30 -
1 stop9h 45m
Deal found 7/11£448
Tue 24/1116:55 -
1 stop28h 35m
Sun 29/1120:10 -
1 stop14h 00m
Deal found 7/11£450
Sat 12/1210:10 -
1 stop12h 35m
Wed 30/1219:10 -
2 stops33h 35m
Deal found 10/11£460
Thu 17/1211:30 -
1 stop11h 50m
Tue 12/118:30 -
1 stop9h 45m
Deal found 7/11£462
Tue 22/1211:30 -
1 stop11h 50m
Mon 11/118:30 -
1 stop9h 45m
Deal found 6/11£465
Thu 17/1211:30 -
1 stop11h 50m
Mon 4/118:30 -
1 stop9h 45m
Deal found 9/11£466

Find flight deals from Ireland to Chicago

Round-trip from

£383

One-way from

£331

Popular in

August

Cheapest in

November

Average price

£392

Good round-trip deal

£524 or less

Good one-way deal

£392 or less
Icelandair
  • Icelandair
  • 21/1-18/2
  • 2 total stops
  • 21h 35m total
  • Ireland to Chicago
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Delta
  • Delta
  • 22/3-31/12
  • 1 total stop
  • 11h 35m total
  • Ireland to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£45 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Ireland to Chicago (CHI).
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Price to beat on a one-way flight from Ireland to Chicago (CHI).
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Mon 22/3

08:50-15:25

1 stop11h 35m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£331

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sun 9/5

05:55-14:00

1 stop14h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£334

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Thu 19/11

04:25-15:30

1 stop17h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£340

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sat 27/3

11:55-09:33

1 stop26h 38m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£345

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sun 21/3

10:45-21:33

1 stop15h 48m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£381

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Mon 18/1

11:30-17:20

1 stop11h 50m

Chicago O'Hare Intl

Thu 28/1

18:30-10:15

1 stop9h 45m

£431

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sun 29/11

10:40-18:20

1 stop37h 40m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£471

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Thu 26/11

06:10-18:20

1 stop18h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£481

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Wed 2/12

08:50-14:25

1 stop11h 35m

Chicago O'Hare Intl

Mon 7/12

10:38-09:00

2 stops16h 22m

£481

DublinChicago

DUB Dublin - ORD Chicago O'Hare Intl

DUBORD

Dublin

Sun 10/1

13:25-10:00

2 stops26h 35m

Chicago O'Hare Intl

Sun 17/1

18:25-14:25

1 stop14h 00m

£501

Flights are sorted by cheapest return flights first.

Deals found on 8/11

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Ireland to Chicago

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

Cheapflights Insights

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

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

Currently, November is the cheapest month in which you can book a flight from Ireland to Chicago (average of £416). Flying from Ireland to Chicago in July is currently the most expensive (average of £623). 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 CHI?

When flying from Ireland to Chicago, 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

The most flights from IE0 to CHI are scheduled on a Monday (13 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).

How often are flights from Ireland to Chicago delayed?

About 10% of weekly flights between Ireland and Chicago have experienced delays in the past year, with the average delay time being 165 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?

Monday tends to have the lowest number of delays on this route, whereas Saturday 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?

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ireland to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Chicago

Check out reviews from past customers who have flown with Finnair,Aer Lingus, andBrussels Airlines from Ireland to Chicago to help guide your decision. 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
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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
1,413 reviews
Finnair
7.6
Good
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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
1,882 reviews
Finnair
7.6
Good
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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.
Brussels Airlines
7.3
Good
437 reviews
Finnair
7.6
Good
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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
7.3
Good
10,472 reviews
Finnair
7.6
Good
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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
8,289 reviews
Finnair
7.6
Good
1,413 reviews
Check prices

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.4

Food

6.7

Crew

8.2

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

  • How long is the flight from Ireland to Chicago?

    Departing from Ireland to Chicago will take you 8h 40m. Ireland and Chicago are separated by a distance of 3661 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Ireland to Chicago?

    The top 3 most reliable airlines when flying from Ireland to Chicago are Finnair (71%), American Airlines (68%) and Aer Lingus (68%).

  • What are the cheapest flights from Ireland to Chicago?

    The cheapest flight price from Ireland to Chicago is £239. On average you can expect to pay £541. The most popular route, (Dublin - Chicago O'Hare Intl), can usually be booked for £438.

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

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

  • How can I find direct flights from Ireland to Chicago?

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

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

    Yes. Cheapflights offers flight deals from Ireland to Chicago 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?

    Currently, November is the cheapest month in which you can book a flight from Ireland to Chicago (average of £416). Flying from Ireland to Chicago in July is currently the most expensive (average of £623). 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 Ireland to Chicago

Heathrow to O'Hare Intl flights
Gatwick to O'Hare Intl flights
Stansted to O'Hare Intl flights
London City to O'Hare Intl flights
Luton to O'Hare Intl flights
Heathrow to Midway flights
Edinburgh to O'Hare Intl flights
Manchester to O'Hare Intl flights
Edinburgh to Midway flights
Heathrow to St. Louis flights
Gatwick to St. Louis flights
London City to St. Louis flights
Gatwick to Midway flights
Manchester to Midway flights
Stansted to St. Louis flights
Glasgow Intl to O'Hare Intl flights
Birmingham to O'Hare Intl flights
Luton to St. Louis flights
Newcastle upon Tyne to O'Hare Intl flights
Southend to O'Hare Intl flights
Belfast Intl to O'Hare Intl flights
Belfast City to O'Hare Intl flights
Manchester to St. Louis flights
Dublin to O'Hare Intl flights
Birmingham to Midway flights
Glasgow Intl to Midway flights
Edinburgh to St. Louis flights
Leeds to O'Hare Intl flights
Glasgow Intl to St. Louis flights
Gatwick to Evansville flights
Inverness to O'Hare Intl flights
Leeds to Midway flights
Newcastle upon Tyne to Midway flights
Manchester to Moline flights
Cardiff to O'Hare Intl flights
Bristol to O'Hare Intl flights
Southampton to O'Hare Intl flights
London City to Evansville flights
Cardiff to Midway flights
Dublin to Midway flights
Birmingham to St. Louis flights
Heathrow to Moline flights
Heathrow to Peoria flights
Newcastle upon Tyne to St. Louis flights
Manchester to Peoria flights
Liverpool to O'Hare Intl flights
Heathrow to Champaign flights

Top 6 airlines flying from Ireland to Chicago

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£311Average£476FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£388Average£539FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£452Average£470FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£457Average£650FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£458Average£663FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£522Average£653FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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Cheapflights helps you search for flights from Ireland to Chicago 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 Ireland to Chicago?

Cheapflights simply makes it quick and affordable to book flights from Ireland to Chicago 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 Chicago with no change fees?

Yes, we can. To see specific flights from Ireland to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

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

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